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Journal articles on the topic 'Cu2+ doped nanoparticles'

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Author: Grafiati
Published: 11 March 2023

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1

Sagadevan, Suresh, Zaira Zaman Chowdhury, Mohd Rafie Bin Johan, Fauziah Abdul Aziz, L. Selva Roselin, Jiban Podder, J. Anita Lett, and Rosilda Selvin. "Cu-Doped SnO2 Nanoparticles: Synthesis and Properties." Journal of Nanoscience and Nanotechnology 19, no. 11 (November 1, 2019): 7139–48. http://dx.doi.org/10.1166/jnn.2019.16666.

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In this work, a simple, co-precipitation technique was used to prepare un-doped, pure tin oxide (SnO2). As synthesized SnO2 nanoparticles were doped with Cu2+ ions. Detailed characterization was carried out to observe the crystalline phase, morphological features and chemical constituents with opto-electrical and magnetic properties of the synthesized nanoparticles (NPs). X-ray diffraction analysis showed the existence of crystalline, tetragonal structure of SnO2. Both the sample synthesized here showed different crystalline morphology. The band gap energy (Eg) of the synthesized sample was estimated and it was found to decrease from 3.60 to 3.26 eV. The band gap energy reduced due to increase in Cu2+ dopant amount inside the SnO2 lattice. Optical properties were analyzed using absorption spectra and Photoluminescence (PL) spectra. It was observed that Cu2+ ions incorporated SnO2 NPs exhibited more degradation efficiencies for Rhodamine B (RhB) dye compared to un-doped sample under UV-Visible irradiation. The dielectric characteristics of un-doped, pure and Cu2+ incorporated SnO2 nanoparticles were studied at different frequency region under different temperatures. The ac conductivity and impedance analysis of pure and Cu2+ incorporated SnO2 nanoparticles was also studied. The magnetic properties of the synthesized samples were analysed. Both the sample showed ferromagnetic properties. The research indicated that the Cu2+ ions doping can make the sample a promising candidate for using in the field of optoelectronics, magneto electronics, and microwave devices.
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2

HUANG Shang-pan, 黄尚攀, 魏智强 WEI Zhi-qiang, 武晓娟 WU Xiao-juan, 陈秀娟 CHEN Xiu-juan, and 元丽华 YUAN Li-hua. "Optical Properties of Cu2+ Doped ZnAl2O4 Nanoparticles." Chinese Journal of Luminescence 40, no. 11 (2019): 1386–93. http://dx.doi.org/10.3788/fgxb20194011.1386.

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3

Galhano, Joana, Gonçalo A. Marcelo, Hugo M. Santos, José Luis Capelo-Martínez, Carlos Lodeiro, and Elisabete Oliveira. "Development of Cyanine 813@Imidazole-Based Doped Supported Devices for Divalent Metal Ions Detection." Chemosensors 10, no. 2 (February 14, 2022): 80. http://dx.doi.org/10.3390/chemosensors10020080.

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A NIR cyanine@imidazole derivative Cy1 was synthesized and evaluated as a metal ion sensor in solution. Cy1 was shown to be very sensitive to all metal ions tested, presenting a blue shift in the absorption from 668 nm to 633 nm, followed by a change in colour from pale green to blue with Zn2+, Cd2+, Co2+, Ni2+ and Hg2+ ions. Despite the blue shift in the absorption, a decrease at 633 nm (with a colour change from pale green to colourless), as well as a quenching in the emission intensity at 785 nm were observed for Cu2+ ions. The results show the formation of sandwich complexes of two ligands per metal ion with the highest association constant observed for Cu2+ (Log Kass.abs = 14.76 ± 0.09; Log Kass.emis. = 14.79 ± 0.06). The minimal detectable amounts were found to be 31 nM and 37 nM, with a naked eye detection of 2.9 ppm and 2.1 ppm for Hg2+ and Cu2+ ions, respectively. These results prompted us to explore the applicability of Cy1 by its combination with nanomaterials. Thus, Cy1@ doped MNs and Cy1@ doped PMMA nanoparticles were synthesized. Both nanosystems were shown to be very sensitive to Cu2+ ions in water, allowing a naked-eye detection of at least 1 ppm for Cy1@ doped MNs and 7 ppm for Cy1@ doped PMMA. This colourimetric response is an easy and inexpensive way to assess the presence of metals in aqueous media with no need for further instrumentation.
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4

Beena, V., S. L. Rayar, S. Ajitha, Awais Ahmad, Faiza Jan Iftikhar, Khamael M. Abualnaja, Taghrid S. Alomar, Mohmed Ouladsmne, and Shafaqat Ali. "Photocatalytic Dye Degradation and Biological Activities of Cu-Doped ZnSe Nanoparticles and Their Insights." Water 13, no. 18 (September 17, 2021): 2561. http://dx.doi.org/10.3390/w13182561.

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Environmental nanotechnology has received much attention owing to its implications on environmental ecosystem, and thus is promising for the elimination of toxic elements from the aquatic surface. This work focuses on Cu-doped ZnSe nanoparticles using the co-precipitation method. The synthesized Cu-doped ZnSe nanoparticles were examined for structural, optical, and morphological properties with the help of XRD, FTIR, UV/vis diffuse reflection spectroscopy (DRS), FESEM, TEM, and XPS. The synthesized Cu-doped ZnSe nanoparticles revealed the presence of Cu2+ in the ZnSe lattice, which has been shown to take a predominant role for enhanced catalysis in the Cu-doped ZnSe nanoparticles. The synthesized Cu-doped ZnSe nanoparticles were investigated for their catalytic and antibacterial activities. The 0.1 M copper-doped ZnSe nanoparticles exhibited the highest rate of degradation against the methyl orange dye, which was found to be 87%. A pseudo-first-order kinetics was followed by Cu-doped ZnSe nanoparticles with a rate constant of 0.1334 min−1. The gram-positive and gram-negative bacteria were used for investigating the anti-bacterial activity of the Cu-doped ZnSe nanoparticles. The Cu-doped ZnSe nanoparticles exhibited enhanced photocatalytic and antibacterial activity.
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Saleem, Shahroz, Muhammad Irfan, Muhammad Yasin Naz, Shazia Shukrullah, Muhammad Adnan Munir, Muhammad Ayyaz, Abdullah Saeed Alwadie, Stanislaw Legutko, Jana Petrů, and Saifur Rahman. "Investigating the Impact of Cu2+ Doping on the Morphological, Structural, Optical, and Electrical Properties of CoFe2O4 Nanoparticles for Use in Electrical Devices." Materials 15, no. 10 (May 13, 2022): 3502. http://dx.doi.org/10.3390/ma15103502.

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This study investigated the production of Cu2+-doped CoFe2O4 nanoparticles (CFO NPs) using a facile sol−gel technique. The impact of Cu2+ doping on the lattice parameters, morphology, optical properties, and electrical properties of CFO NPs was investigated for applications in electrical devices. The XRD analysis revealed the formation of spinel-phased crystalline structures of the specimens with no impurity phases. The average grain size, lattice constant, cell volume, and porosity were measured in the range of 4.55–7.07 nm, 8.1770–8.1097 Å, 546.7414–533.3525 Å3, and 8.77–6.93%, respectively. The SEM analysis revealed a change in morphology of the specimens with a rise in Cu2+ content. The particles started gaining a defined shape and size with a rise in Cu2+ doping. The Cu0.12Co0.88Fe2O4 NPs revealed clear grain boundaries with the least agglomeration. The energy band gap declined from 3.98 eV to 3.21 eV with a shift in Cu2+ concentration from 0.4 to 0.12. The electrical studies showed that doping a trace amount of Cu2+ improved the electrical properties of the CFO NPs without producing any structural distortions. The conductivity of the Cu2+-doped CFO NPs increased from 6.66 × 10−10 to 5.26 × 10−6 ℧ cm−1 with a rise in Cu2+ concentration. The improved structural and electrical characteristics of the prepared Cu2+-doped CFO NPs made them a suitable candidate for electrical devices, diodes, and sensor technology applications.
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6

Fischer, Daiane Kessler, Karina Rodrigues de Fraga, and Carla Weber Scheeren. "Ionic liquid/TiO2 nanoparticles doped with non-expensive metals: new active catalyst for phenol photodegradation." RSC Advances 12, no. 4 (2022): 2473–84. http://dx.doi.org/10.1039/d1ra08459c.

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7

Jiménez-Holguín, Javier, Sandra Sánchez-Salcedo, Mónica Cicuéndez, María Vallet-Regí, and Antonio J. Salinas. "Cu-Doped Hollow Bioactive Glass Nanoparticles for Bone Infection Treatment." Pharmaceutics 14, no. 4 (April 12, 2022): 845. http://dx.doi.org/10.3390/pharmaceutics14040845.

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In search of new approaches to treat bone infection and prevent drug resistance development, a nanosystem based on hollow bioactive glass nanoparticles (HBGN) of composition 79.5SiO2-(18-x)CaO-2.5P2O5-xCuO (x = 0, 2.5 or 5 mol-% CuO) was developed. The objective of the study was to evaluate the capacity of the HBGN to be used as a nanocarrier of the broad-spectrum antibiotic danofloxacin and source of bactericidal Cu2+ ions. Core-shell nanoparticles with specific surface areas close to 800 m2/g and pore volumes around 1 cm3/g were obtained by using hexadecyltrimethylammonium bromide (CTAB) and poly(styrene)-block-poly(acrylic acid) (PS-b-PAA) as structure-directing agents. Flow cytometry studies showed the cytocompatibility of the nanoparticles in MC3T3-E1 pre-osteoblastic cell cultures. Ion release studies confirmed the release of non-cytotoxic concentrations of Cu2+ ions within the therapeutic range. Moreover, it was shown that the inclusion of copper in the system resulted in a more gradual release of danofloxacin that was extended over one week. The bactericidal activity of the nanosystem was evaluated with E. coli and S. aureus strains. Nanoparticles with copper were not able to reduce bacterial viability by themselves and Cu-free HBGN failed to reduce bacterial growth, despite releasing higher antibiotic concentrations. However, HBGN enriched with copper and danofloxacin drastically reduced bacterial growth in sessile, planktonic and biofilm states, which was attributed to a synergistic effect between the action of Cu2+ ions and danofloxacin. Therefore, the nanosystem here investigated is a promising candidate as an alternative for the local treatment of bone infections.
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8

Li, Pen-Xin, Ai-Yun Yang, Lang Xin, Biao Xue, and Chun-Hao Yin. "Photocatalytic Activity and Mechanism of Cu2+ Doped ZnO Nanomaterials." Science of Advanced Materials 14, no. 10 (October 1, 2022): 1599–604. http://dx.doi.org/10.1166/sam.2022.4363.

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The photocatalytic activity and mechanism of photocatalysts made of ZnO nanoparticles before and after doping with different Cu2+ concentrations were studied by electron paramagnetic resonance and X-ray diffraction. The nanoparticles were prepared using sol–gel method. UV-vis spectrometers characterized the photocatalytic degradation effect of the composite samples on methyl orange solution. The results of X-ray diffraction showed that the hexagonal wurtzite structure of ZnO changed little by Cu2+ doping. With the increase in doping concentration, the CuO and Cu2O diffraction peaks were detected successively in the crystal. The results of the electron paramagnetic resonance test for all samples indicated three kinds of unpaired electrons with g factors of 2.07, 1.997, and 1.954. Further analysis confirmed them to be Cu2+, V+O, and Zn–H complexes. Photocatalytic degradation results of methyl orange showed that proper doping (c(Cu2+) = 2%) could improve the photocatalytic activity of ZnO. The main reason for the increase was that the substitution of Cu2+ for Zn2+ in the crystal lattice produced Zni, and the Zn atom could act as the donor to release electrons, so that the number of electrons in the material increased, which indirectly increased the superoxide radical content in the solution and improves the photocatalytic activity of ZnO.
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9

Kamble, Ravi, Smita Mahajan, Vijaya Puri, Harish Shinde, and Kalayanrao Garadkar. "Visible Light-Driven high Photocatalytic Activity of Cu-Doped TiO2 Nanoparticles Synthesized by Hydrothermal Method." Material Science Research India 15, no. 3 (October 18, 2018): 197–208. http://dx.doi.org/10.13005/msri/150301.

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TiO2 and Cu-doped TiO2 nanoparticles (NPs) with totally extraordinary substance of Cu by exploitation hydrothermal method. The part immaculateness, morphology, molecule estimate, optical properties, and elemental composition of as-incorporated Cu-doped TiO2 NPs were investigated by numerous systematic methods. The XRD designs unveiled Cu-doped TiO2 NPs inside the part unadulterated anatase phase. The plane of (101) XRD and XPS results show the lucky doping of Cu2+ inside the TiO2 lattice. The optical edges of Cu-doped TiO2 demonstrated a transparent light absorption in visible region that assumes an essential part inside the photocatalytic action underneath characteristic daylight. Certain Cu2+ content shows least PL intensity that backings the decrease in recombination rate of charge species. In addition, to get a handle on photocatalytic action, we have tried Cu-doped TiO2 for the degradation of Malachite Green (MG) under visible light. A large portion of 85% degradation was found for Cu-doped TiO2 (1.71 wt.%) underneath daylight minimum of 180 min, severally, that is past that of TiO2 (53%). Also, the degradation of the MG was affirmed by measurement of the chemical oxygen demand of the photodegraded solution. These outcomes demonstrates that the Cu-doped TiO2 NPs are extremely productive for the photodegration of the MG.
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10

El Masaoudi, Hind, Ismail Benabdallah, Boujemâa Jaber, and Mohammed Benaissa. "Enhanced visible light photocatalytic activity of Cu2+-doped Ag3PO4 nanoparticles." Chemical Physics 545 (May 2021): 111133. http://dx.doi.org/10.1016/j.chemphys.2021.111133.

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11

Undre, Pallavi G., Prashant B. Kharat, Jitendra S. Kounsalye, R. V. Kathare, and K. M. Jadhav. "Structural, Morphological and Magnetic Properties of Cu2+ Doped ZnO Nanoparticles." Journal of Physics: Conference Series 1644 (September 2020): 012008. http://dx.doi.org/10.1088/1742-6596/1644/1/012008.

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12

Muntaz Begum, Sk, M. C. Rao, and R. V. S. S. N. Ravikumar. "Cu2+ Doped PVA Passivated ZnSe Nanoparticles-Preparation, Characterization and Properties." Journal of Inorganic and Organometallic Polymers and Materials 23, no. 2 (November 22, 2012): 350–56. http://dx.doi.org/10.1007/s10904-012-9783-8.

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13

Undre, Pallavi G., Prashant B. Kharat, R. V. Kathare, and K. M. Jadhav. "Ferromagnetism in Cu2+ doped ZnO nanoparticles and their physical properties." Journal of Materials Science: Materials in Electronics 30, no. 4 (January 9, 2019): 4014–25. http://dx.doi.org/10.1007/s10854-019-00688-4.

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14

Pascuta, Petru, Razvan Stefan, Loredana Elena Olar, Liviu Calin Bolundut, and Eugen Culea. "Effects of Copper Metallic Nanoparticles on Structural and Optical Properties of Antimony Phosphate Glasses Co-Doped with Samarium Ions." Materials 13, no. 21 (November 9, 2020): 5040. http://dx.doi.org/10.3390/ma13215040.

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New antimony phosphate glasses doped with samarium (III) oxide and co-doped with copper metallic nanoparticles (CuNPs) were obtained by the melt quenching technique. The samples were analyzed by X-ray diffraction analysis (XRD), electron paramagnetic resonance (EPR), ultraviolet-visible (UV–Vis) and photoluminescence (PL) spectroscopies. XRD data suggested that all the obtained samples showed an amorphous nature. EPR data suggested the existence of Cu2+ ions octahedrally surrounded by six oxygen atoms. The dipole–dipole interactions between Cu2+ ions were predominant. UV–Vis spectra revealed the presence of Sm3+ and Cu2+ ions in the samples. The values for nephelauxetic and bonding parameters were also calculated. The negative values obtained for bonding parameter indicate an ionic character of the bonds from the glass network. Photoluminescence spectra exhibited emissions from samarium ions and revealed the influence of dopant nature on of rare-earth ions emissions. The obtained results indicate that the studied materials are suitable for solid state lasers.
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15

Yang, Ping, Mengkai Lü, Dong Xü, Duolong Yuan, and Guangjun Zhou. "Photoluminescence properties of ZnS nanoparticles co-doped with Pb2+ and Cu2+." Chemical Physics Letters 336, no. 1-2 (March 2001): 76–80. http://dx.doi.org/10.1016/s0009-2614(01)00038-0.

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16

Habte, Abebe G., Fekadu Gashaw Hone, and F. B. Dejene. "Influence of Cu-Doping Concentration on the Structural and Optical Properties of SnO2 Nanoparticles by Coprecipitation Route." Journal of Nanomaterials 2022 (November 11, 2022): 1–10. http://dx.doi.org/10.1155/2022/5957125.

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Tin dioxide (SnO2) nanoparticles doped with varying concentrations of copper were synthesized and characterized using various techniques. The X-ray diffraction analysis revealed that all doped and undoped SnO2 samples had a rutile-type tetragonal structure. The average crystalline size of the doped samples estimated using Scherrer’s formula and the Williamson–Hall plot decreased as dopant concentration increased. Images from scanning electron microscopy revealed spherical grains in the samples. The transmission electron microscope was used to examine the particle nature, and nearly spherical particles were discovered. The energy-dispersive X-ray spectroscopy analyses confirmed that the synthesized nanoparticles were nearly stoichiometrically composed of the expected elements copper, oxygen, and tin. The bandgap energy of doped and undoped SnO2 nanoparticles was determined using UV–visible diffuse reflectance spectra, and it was found to decrease as Cu2+ ion concentration increased. The photoluminescence study at the excitation wavelength of 300 nm revealed defect-oriented emissions between 350 and 500 nm. All the obtained results showed that the physical properties of SnO2 can be easily engineered through Cu doping for various optoelectronic applications using a low-cost coprecipitation method.
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Zou, Wen Guo, Meng Kai Lü, Feng Gu, Shufen Wang, Zhiliang Xiu, and Guangjun Zhou. "Photoluminescence characteristics of β-BaB2O4 nanoparticles co-doped with Cu2+ and Pb2+." Materials Science and Engineering: B 127, no. 2-3 (February 2006): 134–37. http://dx.doi.org/10.1016/j.mseb.2005.10.002.

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18

Zhao, Lianqin, Xue-Ling Chang, Rong Liao, Xiaoliang Zhang, Jingru Xie, Baowei Yu, Ruihan Wu, Ruijue Wang, and Sheng-Tao Yang. "Facile hydrothermal preparation of S-doped Fe3O4@C nanoparticles for Cu2+ removal." Materials Letters 135 (November 2014): 154–57. http://dx.doi.org/10.1016/j.matlet.2014.07.166.

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19

Singhania, Amit, and Shipra Mital Gupta. "Low-temperature CO oxidation over Cu/Pt co-doped ZrO2 nanoparticles synthesized by solution combustion." Beilstein Journal of Nanotechnology 8 (July 31, 2017): 1546–52. http://dx.doi.org/10.3762/bjnano.8.156.

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Zirconia (ZrO2) nanoparticles co-doped with Cu and Pt were applied as catalysts for carbon monoxide (CO) oxidation. These materials were prepared through solution combustion in order to obtain highly active and stable catalytic nanomaterials. This method allows Pt2+ and Cu2+ ions to dissolve into the ZrO2 lattice and thus creates oxygen vacancies due to lattice distortion and charge imbalance. High-resolution transmission electron microscopy (HRTEM) results showed Cu/Pt co-doped ZrO2 nanoparticles with a size of ca. 10 nm. X-ray diffraction (XRD) and Raman spectra confirmed cubic structure and larger oxygen vacancies. The nanoparticles showed excellent activity for CO oxidation. The temperature T 50 (the temperature at which 50% of CO are converted) was lowered by 175 °C in comparison to bare ZrO2. Further, they exhibited very high stability for CO reaction (time-on-stream ≈ 70 h). This is due to combined effect of smaller particle size, large oxygen vacancies, high specific surface area and better thermal stability of the Cu/Pt co-doped ZrO2 nanoparticles. The apparent activation energy for CO oxidation is found to be 45.6 kJ·mol−1. The CO conversion decreases with increase in gas hourly space velocity (GHSV) and initial CO concentration.
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20

Gao, Buhong, Fengyi Zhao, Yingchun Miao, Huihua Min, Li Xu, and Chaobo Huang. "Boron- and nitrogen-doped photoluminescent polymer carbon nanoparticles as nanosensors for imaging detection of Cu2+ and biothiols in living cells." RSC Adv. 7, no. 75 (2017): 47654–61. http://dx.doi.org/10.1039/c7ra07683e.

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21

Wang, Xianliang, Xin Liu, Dewei Zhu, and Mark T. Swihart. "Controllable conversion of plasmonic Cu2−xS nanoparticles to Au2S by cation exchange and electron beam induced transformation of Cu2−xS–Au2S core/shell nanostructures." Nanoscale 6, no. 15 (2014): 8852–57. http://dx.doi.org/10.1039/c4nr02114b.

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Self-doped Cu2−xS plasmonic semiconductor nanocrystals were converted into monodisperse Cu2−xS–Au2S nanocrystals of tunable composition, including pure Au2S, by cation exchange.
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22

Teng, Yu, Bin Qian, Nan Jiang, Yin Liu, Fangfang Luo, Song Ye, Jiajia Zhou, Bin Zhu, Heping Zeng, and Jianrong Qiu. "Light and heat driven precipitation of copper nanoparticles inside Cu2+-doped borate glasses." Chemical Physics Letters 485, no. 1-3 (January 2010): 91–94. http://dx.doi.org/10.1016/j.cplett.2009.12.010.

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23

Aghazadeh, Mustafa, Mohammad Reza Ganjali, Mina Mohebi Morad, and Davoud Gharailou. "Saccharide-capped Superparamagnetic Copper Cations-doped Magnetite Nanoparticles for Biomedical Applications: A Novel and Simple Synthesis Procedure, In-situ Surface Engineering and Characterization." Current Nanoscience 16, no. 5 (October 5, 2020): 770–78. http://dx.doi.org/10.2174/1573413716666191220120718.

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Background: Recently, superparamagnetic and electromagnetic nano-materials have been extensively studied and their potential applications have also been investigated in various fields. In this regard, currently, Fe3O4 NPs are valuable candidates as diagnostic agents such as magnetic resonance imaging, enzyme immobilization, biosensing and cell labeling, and therapeutic probes, including drug delivery, bacteria detection, magnetic separation, and hyperthermia agents. Objective: In this study, electrochemical synthesis of Cu2+ cations-doped superparamagnetic magnetite nanoparticles (Cu-SMNPs) and their in situ surface coating with saccharides (i.e., glucose, sucrose and starch) are reported. The prepared glucose/Cu-SMNPs, sucrose/Cu-SMNPs and starch/Cu-SMNPs samples are characterized by structural, magnetic and morphological analyses by XRD, FT-IR, FE-SEM, EDAX and VSM. The suitability of the prepared samples for biomedical use is also proved. Methods: A simple cathodic electrochemical set-up was used to fabricate the iron oxide samples. The bath electrolyte was one litre deionized water containing 1.5g iron chloride, 3g iron nitrate, 0.5g copper chloride and 0.5g saccharide (i.e., glucose or sucrose or starch). The cathode and anode electrodes were connected to a DC power supply (PROVA 8000) as the power source. The deposition experiments were conducted at 10 mA cm-2 for 30 min. For the preparation of glucose/Cu-SMNPs, sucrose/Cu-SMNPs and starch/Cu-SMNPs samples, three electrodeposition experiments were carried out in three similar baths with only a change in the dissolved saccharide type. The prepared SMNPs samples were characterized by structural, morphological and magnetic analyses including X-ray powder diffraction (XRD, a Phillips PW-1800 diffractometer Smart Lab), field-emission scanning electron microscopy (FE-SEM, Mira 3-XMU with accelerating voltage of 100 kV), transmission electron microscopy (TEM, model Zeiss EM900 with an accelerating voltage of 80 kV), fourier transform infrared (FT-IR, a Bruker Vector 22 Fourier transformed infrared spectrometer) and vibrating sample magnetometers (VSM, model Lakeshore 7410). Results: Three types of metal-cations doped superparamagnetic magnetite nanoparticles (SMNPs), glucosegrafted Cu2+-doped MNPs (glucose/Cu-SMNPs), sucrose-grafted Cu2+-doped SMNPs (sucrose/Cu-SMNPs) and starch-grafted Cu2+-doped SMNPs (starch/Cu-SMNPs), were prepared for the first time. Fourier-transform infrared spectroscopy, field-emission scanning electron microscopy and energy dispersive X-ray techniques proved the presence of saccharide capped layer on the surface of deposited SMNPs and also copper cations doping on their crystal structures. Superparamagnetic behaviors, including low coercivity and remanence values, were observed for all the prepared samples. Conclusion: SMNPs capped with saccharides (i.e., glucose, sucrose and starch) were successfully synthesized via one-pot simple deposition procedures. These particles showed suitable superparamagnetic properties with negligible remanence values and proper saturation magnetization, thus proving that they all have required physicochemical and magnetic characteristics for biomedical purposes.
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Gurin, V. S., and A. A. Alexeenko. "Optical Features of the Silica Sol–Gel Derived Glasses Doped with Copper Selenide Nanoparticles." International Journal of Nanoscience 18, no. 03n04 (March 26, 2019): 1940021. http://dx.doi.org/10.1142/s0219581x19400210.

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In the field of semiconductor nanooptics, copper chalcogenides have challenged a novel direction associated with nontrivial optical features in the near IR range important for applications. We consider this phenomenon in the silica sol–gel derived glasses doped with copper selenide nanoparticles. They were characterized with transmission electron microscopy, X-ray photoelectron spectroscopy and optical absorption spectroscopy. An origin of the near IR optical features is discussed involving both the plasmon resonance concept extended to the self-doping of chalcogenides with a variable stoichiometry and the effect of Cu2+ impurity-generated intraband levels providing linear and nonlinear optical response of these materials.
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Zhu, Wei, Qihui Shen, Xinjian Bao, Xiao Bai, Tingting Li, Mingqiang Zou, Jinfeng Li, Yan Liu, and Xiaoyang Liu. "Optical Characterization of Monodispersed Aaqueous Cu2+-Doped CdS Nanoparticles Prepared Under Microwave Irradiation Conditions." Current Microwave Chemistry 01, no. 999 (November 11, 2014): 1. http://dx.doi.org/10.2174/2213335601666141111225136.

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AJALA, Mary Adejoke, Ambali Saka ABDULKAREEM, Abdulsalami Sanni KOVO, Jimoh Oladejo TIJANI, and Olawale Elijah AJALA. "ADSORPTION STUDIES OF ZINC, COPPER, AND LEAD IONS FROM PHARMACEUTICAL WASTEWATER ONTO SILVER-MODIFIED CLAY ADSORBENT." SOUTHERN JOURNAL OF SCIENCES 30, no. 33 (June 27, 2022): 28–43. http://dx.doi.org/10.48141/sjs.v30.n33.2022.06_ajala_pgs_28_43.pdf.

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Background: Industrial wastewater contains pollutants that are detrimental to human health in varied proportions. Among the pollutants are heavy metals, including Zn2+, Pb2+, and Cu2+ found in a characterized pharmaceutical wastewater. Several techniques have been proposed for the heavy metal sequester. However, they are with attendant challenges. The adsorption techniques using clay-metal oxide modified adsorbent/composite such as silver-clay adsorbent is considered suitable for an effective sequestering process. Aims: To develop and characterize Ag/clay adsorbent for pharmaceutical wastewater treatment. Methods: The Ag nanoparticles were synthesized using Parkia biglobossa aqueous leaves extract in an optimization study. The raw clay was beneficiated and doped with silver nanoparticles via the wet impregnation method. The silver-clay adsorbent was characterized using FTIR, XRD, SEM, and EDS characterization tools. The developed adsorbent was used for the batch adsorption process of the heavy metal ion removal from the wastewater. Results and Discussion: The phytochemical analysis and FTIR results of the P. biglobosa showed that the leaf contains phenol, tannin, and flavonoids which acts as reducing, capping, and stabilizing agent required for synthesizing the silver nanoparticles. The prepared silver nanoparticles modified clay adsorbent Ag/clay, have evenly distributed stacks of pseudo-hexagonal plates, are rich in silica, possess silver nanoparticles in the frameworks, and contain functional groups suitable for binding heavy metals. The adsorptions of Zn2+, Pb2+, and Cu2+ from pharmaceutical wastewater onto the silver-modified clay were studied as a function of adsorbent dosage and contact time. The percentage removal results obtained showed that the adsorbent had up to 99.96%, 99.5%, and 99.44% removal efficiency for Zn2+, Pb2+, and Cu2+, respectively, which are better compared with previous studies. The adsorption process was feasible, spontaneous, and exothermic, with Langmuir and Pseudo-second-order models as best fits for the process. Conclusions: The adsorption of selected heavy metal ions onto the green synthesized silver-modified clay adsorbent (Ag/clay) was feasible, spontaneous, and exothermic in the order Zn2+>Pb2+>Cu2+ with Langmuir and Pseudo-second-order model best fitted for the process. These show that the synthesized silver oxide nanoparticles supported on local clay can be used as a potentially low-cost adsorbent to remove heavy metal ions from industrial wastewater.
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Tain, You-Lin, Hung-Wei Yang, Chih-Yao Hou, Guo-Ping Chang-Chien, Sufan Lin, and Chien-Ning Hsu. "Anti-Hypertensive Property of an NO Nanoparticle in an Adenine-Induced Chronic Kidney Disease Young Rat Model." Antioxidants 12, no. 2 (February 17, 2023): 513. http://dx.doi.org/10.3390/antiox12020513.

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Hypertension is the most common complication of chronic kidney disease (CKD) in children but is still poorly controlled. Nitric oxide (NO) deficiency plays a pivotal role in CKD and hypertension. NO is known to have health benefits, while NO typically has a short half-life and is not specifically targeted. In this study, we used a pediatric CKD model, which was induced in young rats by feeding them 0.25% adenine. We investigated two different NO donors, namely S-nitrosoglutathione (GSNO) and diethylenetriamine/NO adduct (DETA NONOate) via intraperitoneal injection at 10 mg/kg/day daily for 3 weeks. GSNO was delivered by Cu2+-doped zeolitic imidazolate framework (Cu/ZIF-8) nanoparticles to generate NO. As a result, we observed Cu/ZIF-8 nanoparticles were successfully loaded with GSNO and were able to release NO. Young rats fed with adenine displayed kidney dysfunction and hypertension at 9 weeks of age, which were prevented by GSNO-loaded nanoparticle or DETA NONOate treatment. GSNO-loaded nanoparticles reduced CKD-induced hypertension, which was related to an enhanced endogenous NO-generating system, reduced renal oxidative stress, and downregulated several components belonging to the classic renin–angiotensin (RAS) system. Our results cast new light on targeting NO delivery through the use of nanoparticles aiming to improve child-focused outcomes related to CKD worthy of clinical translation.
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de los Santos, Desireé M., Sara Chahid, Rodrigo Alcántara, Javier Navas, Teresa Aguilar, Juan Jesús Gallardo, Roberto Gómez-Villarejo, Iván Carrillo-Berdugo, and Concha Fernández-Lorenzo. "MoS2/Cu/TiO2 nanoparticles: synthesis, characterization and effect on photocatalytic decomposition of methylene blue in water under visible light." Water Science and Technology 2017, no. 1 (March 7, 2018): 184–93. http://dx.doi.org/10.2166/wst.2018.101.

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Abstract Photodegradation processes are of great interest in a range of applications, one of which is the photodecomposition of pollutants. For this reason, analysing nanoparticles that improve the efficiency of these processes under solar radiation are very necessary. Thus, in this study, TiO2 was doped with Mo and Cu using low-temperature hydrolysis as the method of synthesis. Pure TiO2 and x%MoS2/Cu/TiO2 nanoparticles were prepared, where x is the theoretical quantity of MoS2 added (0.0%, 1.0%, 5.5%, 10.0%), setting the nominal quantity of Cu at 0.5 wt.%. The samples obtained were characterized by X-ray diffraction, Raman spectroscopy, X-ray electron spectroscopy and UV-Vis spectroscopy in diffuse reflectance mode. The results suggest that the TiO2 structure was doped with the Mo6+ and Cu2+ ions in the position of the Ti4+. The x%MoS2/Cu/TiO2 samples presented lower band gap energy values and greater optical absorption in the visible region than the pure TiO2 sample. Lastly, the photocatalytic activity of the samples was assessed by means of the photodegradation of methylene blue under visible light. The results show that when the quantity of Mo in the co-doped samples increased (x%MoS2/Cu/TiO2) there were significant increases of up to 93% in the photocatalytic activity.
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Hamdi, N., L. Bessais, and W. Belam. "Sol-gel Autocombustion Elaboration and Physiochemical Characterizations of Cu2+ Substituted Cobalt Ferrite Nanoparticles." Open Chemistry Journal 7, no. 1 (December 31, 2020): 44–54. http://dx.doi.org/10.2174/1874842202007010044.

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Introduction: The copper doped cobalt ferrite series, with nominal formula CuXCo1-XFe2O4 (X = 0, 0.25, 0.5, 0.75, 1), has been elaborated via sol-gel autocombustion process by copper substitution procedure into cobalt ferrite framework. Methods: The five synthesized ferrites have been analyzed by X-ray powder diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy coupled to energy dispersive X-ray spectroscopy, complex impedance spectroscopy and superconducting quantum interference device magnetometry. Results and Discussion: The analysis of the results allowed to deduce that the cubic spinel basic structure was not modified by the incorporation of copper into the host lattice and the corresponding pure fine powders obtained formed by homogeneous nanoparticles. The highest electrical conductivity value, σDC(373K) = 27.03x10-3S.cm-1, was observed in the case of CuFe2O4. Conclusion: Moreover, the superparamagnetic behavior at room temperature has been confirmed by using both ZFC-FC and hysteresis magnetic measurement modes. In addition, the remarkable electrical conductivity and magnetic properties of the five explored nanoferrites, derived from the present investigation, enabled them useful in several modern nanotechnological and biomedical applications.
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Kole, A. K., P. Kumbhakar, and U. Chatterjee. "Observation of nonlinear absorption and visible photoluminescence emission in chemically synthesized Cu2+ doped ZnS nanoparticles." Applied Physics Letters 100, no. 1 (January 2, 2012): 013103. http://dx.doi.org/10.1063/1.3674307.

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Yan, Qing, Zi-Han Chen, Shi-Fan Xue, Xin-Yue Han, Zi-Yang Lin, Shengqiang Zhang, Guoyue Shi, and Min Zhang. "Lanthanide-doped nanoparticles encountering porphyrin hydrate: Boosting a dual-mode optical nanokit for Cu2+ sensing." Sensors and Actuators B: Chemical 268 (September 2018): 108–14. http://dx.doi.org/10.1016/j.snb.2018.04.080.

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Hammad, Talaat M., Jamil K. Salem, S. Kuhn, Mohammed Abu Draaz, R. Hempelmann, and Fawzi S. Kodeh. "Optical properties of Cu2+ and Fe2+ doped ZnS semiconductor nanoparticles synthesized by co-precipitation method." Journal of Materials Science: Materials in Electronics 26, no. 7 (May 1, 2015): 5495–501. http://dx.doi.org/10.1007/s10854-015-3106-0.

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Dzhagan, Volodymyr M., Oleksandr L. Stroyuk, Oleksandra E. Rayevska, Stepan Ya Kuchmiy, Mykhailo Ya Valakh, Yuriy M. Azhniuk, Cristian von Borczyskowski, and Dietrich R. T. Zahn. "A spectroscopic and photochemical study of Ag+-, Cu2+-, Hg2+-, and Bi3+-doped CdxZn1−xS nanoparticles." Journal of Colloid and Interface Science 345, no. 2 (May 2010): 515–23. http://dx.doi.org/10.1016/j.jcis.2010.02.001.

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Kuppayee, M., G. K. Vanathi Nachiyar, and V. Ramasamy. "Synthesis and characterization of Cu2+ doped ZnS nanoparticles using TOPO and SHMP as capping agents." Applied Surface Science 257, no. 15 (May 2011): 6779–86. http://dx.doi.org/10.1016/j.apsusc.2011.02.124.

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Hejazi, Sina, Shiva Mohajernia, and Manuela Kilian. "Intrinsic Cu Nanoparticle Decoration of TiO2 Nanotubes: A Platform for Efficient Noble Metal Free Photocatalytic H2 Production." ECS Meeting Abstracts MA2022-01, no. 36 (July 7, 2022): 1593. http://dx.doi.org/10.1149/ma2022-01361593mtgabs.

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The use of titanium dioxide (TiO2) for photocatalytic applications has been intensively investigated for years due to appropriate electronic properties, chemical and photocorrosion resistance, as well as the low cost of the material [1]. Although TiO2 has a suitable conduction band position for the photocatalytic H2 formation reaction, the hydrogen evolution reaction from water on a TiO2 surface is kinetically hampered. To tackle this problem, typically decoration with noble metals such as Pt, Pd, Au that act as a co-catalyst is employed. However, these noble metals are costly and a variety of pathways for replacing these elements have been explored. One of the promising substitutes for noble metals are copper and copper-compounds. The fabrication of copper co-catalyst loaded TiO2 nanotubes is conventionally carried out by chemical methods such as hydrothermal, impregnation, photo-deposition and electrochemical deposition [2]. However, a most straightforward and unique method to modify anodic TiO2 nanotube properties is employing, instead of pure Ti metallic substrate, a Ti‐X alloy in the anodization process, were X is another metal. During anodizing the second metal can be simultaneously oxidized and doped into the TiO2 lattice (in substitutional or interstitial position), giving the nanotubes a specific functionality [3–5]. A number of such intrinsically doped nanotube arrays have been reported, namely using Nb, Ta, Ru and etc., alloyed in Ti [3–5]. In this work, we grow intrinsically Cu doped TiO2 nanotubes (TiNTs) by self-organizing anodization of Ti-Cu binary alloys. We demonstrate that up to a copper concentration of 1.5 at.% in the alloy, self-ordered Cu2+-doped nanotubes can be grown. Under UV illumination the Cu2+ ion-doped oxide structures can be converted to nanotubes that carry metallic nanoparticles (NPs) uniformly decorated TiNTs. We investigate the formation of these metallic nanoparticles under UV illumination by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR). The resulting intrinsic copper doped and decorated TiNTs provide a strongly enhanced photocatalytic activity for H2 evolution in comparison to pristine TiNTs. Key is the light induced conversion of the intrinsic Cu doping to metallic copper nanoparticles that act as a stable co-catalyst for H2 generation. [1] K. Lee, A. Mazare, P. Schmuki, Chem. Rev. 2014, 114, 9385–9454. [2] M. Janczarek, E. Kowalska, Catalysts. 2017, 7, 317-324. [3] P. Roy, C. Das, K. Lee, R. Hahn, T. Ruff, M. Moll, P. Schmuki, J. Am. Chem. Soc. 2011, 133, 5629–5631. [4] M. Altomare, K. Lee, M.S. Killian, E. Selli, P. Schmuki, Chem. - A Eur. J. 2013, 19, 5841–5844. [5] C. Das, P. Roy, M. Yang, H. Jha, P. Schmuki, Nanoscale. 2011, 3, 3094–3096. Figure 1
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36

Abhirama, K. J., N. Saraswathi, and K. U. Madhu. "Antibacterial Activity of Undoped and Cu2+ Doped Tin Oxide Nanoparticles Synthesized by Microwave Irradiated Solvothermal Method." Asian Journal of Chemistry 34, no. 7 (2022): 1773–78. http://dx.doi.org/10.14233/ajchem.2022.23733.

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In present work, a simple and facile microwave irradiated solvothermal method was applied for the synthesis of undoped and Cu2+ doped tin oxide nanoparticles. Thermal characterization was performed to study the thermal stability and to fix the annealing temperature. All the prepared samples were annealed at 500 ºC and then characterized. Structural, morphological and optical characterizations were done using PXRD, TEM, SEM and UV-Vis NIR analysis. The PXRD measurement shows the tetragonal phase of tin oxide. Agglomerated and spherical morphology was observed in SEM and TEM micrographs. Presence of blue shift was observed in the absorption spectra of the prepared samples. Elemental compositions of the samples were analyzed using EDX patterns. Magnetic characterization was performed using vibrating sample magnetometer and the analysis revealed that the prepared samples were diamagnetic in nature. Antibacterial studies showed the efficient activity against the Gram-positive and Gram-negative bacterial stains.
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Gandhi, Nishith P., Jigneshkumar V. Rohit, Mungara Anil Kumar, and Suresh Kumar Kailasa. "4-Mercaptophenylacetic acid functionalized Mn2+-doped ZnS nanoparticles fluorescence quenching caused by the addition of Cu2+." Research on Chemical Intermediates 39, no. 8 (November 2, 2012): 3631–39. http://dx.doi.org/10.1007/s11164-012-0867-4.

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Wang, Xueyao, Qiang Li, Dongmei Yang, Xianhui An, and Xueren Qian. "Phytic Acid Doped Polyaniline as a Binding Coating Promoting Growth of Prussian Blue on Cotton Fibers for Adsorption of Copper Ions." Coatings 12, no. 2 (January 25, 2022): 138. http://dx.doi.org/10.3390/coatings12020138.

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In recent years, the elimination of heavy metals from wastewater has become an important topic due to rapid industrialization, and it is of considerable interest to develop renewable and degradable materials for this purpose. In this work, a novel Prussian blue/polyaniline@cotton fibers (PB/PANI@CFs) composite was fabricated by a two-step process. Phytic acid doped PANI as a binding coating greatly promoted both the growth of PB and the adsorption of Cu2+. The deposition ratio of PB was as high as 24.68%. Scanning electron microscopy (SEM) displayed that PB nanoparticles were grown more uniformly in the composite and formed a perfect nanocube structure compared with PB@CFs. The successful deposition of both PB and PANI on CFs was demonstrated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FITR), and X-ray photoelectron spectroscopy (XPS). The effect of adsorption time, adsorbent dose, initial pH value, and initial copper sulphate concentration on the adsorption of PB/PANI@CFs composite for Cu2+ was studied by static adsorption and was compared with those of PANI@CFs and PB@CFs. The results showed that the maximum removal efficiency of Cu2+ by PB/PANI@CFs can reach 93.4% within 5 h, and the maximum adsorption capacity of Cu2+ can reach 31.93 mg·g−1. The adsorption of Cu2+ on PB/PANI@CFs followed the pseudo-second order kinetic model and conformed to the Freundlich adsorption isothermal model. The PB-functionalized CFs provided new insights into the design of efficient and low-cost absorbents for heavy metal remediation. The proposed process solves two problems simultaneously, i.e., the utilization of environmentally friendly and biodegradable biomass resources and the adsorption of heavy metal ions, and is a good approach to achieve high-quality and sustainable development.
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Huang, Xuanlin, Wei Du, Rong Chen, and Fengxi Chen. "Adsorption-enhanced catalytic wet peroxide oxidation of aromatic compounds on ionothermally synthesised copper-doped magnetite magnetic nanoparticles." Environmental Chemistry 17, no. 6 (2020): 426. http://dx.doi.org/10.1071/en19245.

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Environmental contextAromatic compounds are major organic pollutants that are hard to clean up by either adsorption or biological treatment processes. We synthesised Cu-doped Fe3O4 magnetic nanoparticles and showed that they efficiently degrade various aromatic compounds with H2O2 under mild conditions. This active and stabile heterogeneous Fenton-like catalyst has the potential for various environmental applications. AbstractMagnetite magnetic nanoparticles (Fe3O4 MNPs) have great potential in environmental remediation owing to the intrinsic peroxidase-like activity, which is unfortunately not strong enough to activate H2O2 for practical applications. Herein, Cu-doped Fe3O4 MNPs (Fe2.88Cu0.12O4) were ionothermally synthesised and demonstrated as a highly efficient and stable heterogeneous Fenton-like catalyst for the catalytic wet peroxide oxidation of aromatic compounds with H2O2 at pH ~7 and 25°C. Theoretical calculations found that the interaction between aromatic compounds (e.g. orange G) and Cu2+ through a terminal end-on binding mode with moderate strength was favourable to enhance their adsorption on Fe2.88Cu0.12O4. In addition, copper dopants increased the decomposition rate of H2O2 at 25°C about four-fold (0.584h−1 on Fe2.88Cu0.12O4 versus 0.153h−1 on Fe3O4), which is attributed to efficient redox cycling of iron and copper ions for synergistic activation of H2O2. Copper-enhanced adsorption of aromatic compounds, together with synergistic activation of H2O2 by surface iron and copper active sites, explained the higher catalytic activity of Fe2.88Cu0.12O4. This study provided new insight for improving the catalytic performance of magnetite-based heterogeneous catalysts for various environmental and biomedical applications.
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Sharma, Anuradha, Anuj Mittal, Shankar Sharma, Kavitha Kumari, Sanjeev Maken, and Naveen Kumar. "Cu2+-doped α–β phase heterojunctions in Bi2O3 nanoparticles for enhanced photocatalytic degradation of organic dye rhodamine B." Applied Nanoscience 12, no. 2 (December 3, 2021): 151–64. http://dx.doi.org/10.1007/s13204-021-02250-3.

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41

Rivera, Julio A., Sonia J. Bailón-Ruiz, and Oscar J. Perales-Perez. "One-step Aqueous Synthesis of Zn-based Quantum Dots as Potential Generators of Reactive Oxygen Species." MRS Advances 4, no. 07 (2019): 399–404. http://dx.doi.org/10.1557/adv.2019.27.

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AbstractThe actual incorporation of dopant species into the ZnS Quantum Dots (QDs) host lattice will induce structural defects evidenced by a red shift in the corresponding exciton. The doping should create new intermediate energetic levels between the valence and conduction bands of the ZnS and affect the electron-hole recombination. These trap states would favour the energy transfer processes involved with the generation of cytotoxic radicals, so-called Reactive Oxygen Species, opening the possibility to apply these nanomaterials in cancer research. Any synthesis approach should consider the direct formation of the QDs in biocompatible medium. Accordingly, the present work addresses the microwave-assisted aqueous synthesis of pure and doped ZnS QDs. As-synthesized quantum dots were fully characterized on a structural, morphological and optical viewpoint. UV-Vis analyzes evidenced the excitonic peaks at approximately 310 nm, 314 nm and 315 nm for ZnS, Cu-ZnS and Mn-ZnS, respectively, Cu/Zn and Mn/Zn molar ratio was 0.05%. This indicates the actual incorporation of the dopant species into the host lattice. In addition, the Photoluminescence spectrum of non-doped ZnS nanoparticles showed a high emission peak that was red shifted when Mn2+ or Cu2+ were added during the synthesis process. The main emission peak of non-doped ZnS, Cu-doped ZnS and Mn-doped ZnS were observed at 438 nm, 487 nm and 521 nm, respectively. Forthcoming work will address the capacity of pure and Cu-, Mn-ZnS quantum dots to generate cytotoxic Reactive Oxygen Species for cancer treatment applications.
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Phuc, Dang Huu, and Ha Thanh Tung. "Band Tunable CdSe Quantum Dot-Doped Metals for Quantum Dot-Sensitized Solar Cell Application." International Journal of Photoenergy 2019 (February 25, 2019): 1–8. http://dx.doi.org/10.1155/2019/9812719.

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Quantum dots are drawing great attention as a material for the next-generation solar cells because of the high absorption coefficient, tunable band gap, and multiple exciton generation effect. In search of the viable way to enhance the power conversion efficiency of quantum dot-sensitized solar cells, we have succeeded in preparing the quantum dot solar cells with high efficiency based on CdSe:X (Mn2+ or Cu2+) nanocrystal by successive ionic layer absorption and reaction. The morphological observation and crystalline structure of photoanode were characterized by field-emission scanning electron microscopy, X-ray diffraction, and the EDX spectra. In addition, the electrochemical performance of photoelectrode was studied by the electrochemical impedance spectra. As a result, we have succeeded in designing QDSSCs with a high efficiency of 4.3%. Moreover, the optical properties, the direct optical energy gap, and both the conduction band and the valence band levels of the compositional CdSe:X were estimated by the theory of Tauc and discussed details. This theory is useful for us to understand the alignment energy structure of the compositions in electrodes, in particular, the conduction band and valence band levels of CdSe:X nanoparticles.
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Li, Xianghong, Rongqing Zeng, Chaoyi Xie, Dingguo Tang, Qin Li, Bingguang Zhang, and Tao Huang. "Silica nanoparticles doped with a benzo[e]indolium-tethered iridium(III) complex for reversible detection of HSO3− and Hg2+/Cu2+ in water." Dyes and Pigments 165 (June 2019): 128–36. http://dx.doi.org/10.1016/j.dyepig.2019.02.018.

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Dostani, Morteza, Ali Hossein Kianfar, and Mohammad Mohsen Momeni. "Visible light photocatalytic activity of novel Ni2+, Cu2+ and VO2 complexes derived from vanillin bidentate Schiff base ligand doped on TiO2 nanoparticles." Journal of Materials Science: Materials in Electronics 28, no. 1 (August 24, 2016): 633–40. http://dx.doi.org/10.1007/s10854-016-5568-0.

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45

Fedorenko, Svetlana, Dinara Farvaeva, Alexey Stepanov, Olga Bochkova, Kirill Kholin, Irek Nizameev, Sergey Drobyshev, et al. "Tricks for organic-capped Cu2-xS nanoparticles encapsulation into silica nanocomposites co-doped with red emitting luminophore for NIR activated-photothermal/chemodynamic therapy." Journal of Photochemistry and Photobiology A: Chemistry 433 (December 2022): 114187. http://dx.doi.org/10.1016/j.jphotochem.2022.114187.

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46

Azizi, Seyed Naser, Mohammad Javad Chaichi, Parmis Shakeri, Ahmadreza Bekhradnia, Mehdi Taghavi, and Mousa Ghaemy. "Chemiluminescence of Mn-Doped ZnS Nanocrystals Induced by Direct Chemical Oxidation and Ionic Liquid-Sensitized Effect as an Efficient and Green Catalyst." Journal of Spectroscopy 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/803592.

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A novel chemiluminescence (CL) method was proposed for doping water-soluble Mn in ZnS quantum dots (QDs) as CL emitter. Water-soluble Mn-doped ZnS QDs were synthesized by using L-cysteine as stabilizer in aqueous solution. These nanoparticles were structurally and optically characterized by X-ray powder diffraction (XRD), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), UV-Vis absorption spectroscopy, and photoluminescence (PL) emission spectroscopy. The CL of ZnS QDs was induced directly by chemical oxidation and its ionic liquid-sensitized effect in aqueous solution was then investigated. It was found that oxidants, especially hydrogen peroxide, could directly oxidize ZnS QDs to produce weak CL emission in basic solutions. In the presence of 1,3-dipropylimidazolium bromide/copper, a drastic light emission enhancement was observed which is related to a strong interaction between Cu2+and the imidazolium ring. In these conditions, an efficient CL light was produced at low pH which is suggested to be beneficial to the biological analysis. The CL properties of QDs not only will be helpful to study physical chemistry properties of semiconductor nanocrystals but also they are expected to find use in many fields such as luminescence devices, bioanalysis, and multicolor labeling probes.
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Ranjith, Kugalur Shanmugam, Chung-Li Dong, Ying-Rui Lu, Yu-Cheng Huang, Chi-Liang Chen, Padmanapan Saravanan, Kandasami Asokan, and Ramasamy Thangavelu Rajendra Kumar. "Evolution of Visible Photocatalytic Properties of Cu-Doped CeO2 Nanoparticles: Role of Cu2+-Mediated Oxygen Vacancies and the Mixed-Valence States of Ce Ions." ACS Sustainable Chemistry & Engineering 6, no. 7 (May 14, 2018): 8536–46. http://dx.doi.org/10.1021/acssuschemeng.8b00848.

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48

Abbasi, Amirali, and Jaber Jahanbin Sardroodi. "Theoretical investigation of the adsorption behaviors of CO and CO2 molecules on the nitrogen-doped TiO2 anatase nanoparticles: Insights from DFT computations." Journal of Theoretical and Computational Chemistry 16, no. 01 (February 2017): 1750005. http://dx.doi.org/10.1142/s0219633617500055.

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Over the past years, an interest has arisen in resolving the problems of the increased carbon monoxide and carbon dioxide emissions, leading to the serious air pollution and many detrimental effects. A convenient solution would be a process that could utilize metal oxide nanoparticles such as TiO2 to control the concentration of atmospheric pollutants. The chemisorption of CO and CO2 molecules over the semiconductor titanium dioxide (TiO[Formula: see text] is such a process. In this way, density functional theory (DFT) calculations were performed to investigate CO and CO2 adsorptions on undoped and N-doped TiO2 anatase nanoparticles. The supercell approach is conducted to construct the considered nanoparticles and the adsorption of COx molecule was simulated by use of these chosen nanoparticles. By including van der Waals (vdW) interactions between COx molecule and TiO2 nanoparticle, we found that both CO and CO2 molecules can bind strongly to the N-doped nanoparticles. The adsorption on the five-fold coordinated titanium site of TiO2 nanoparticles including the bond lengths, bond angles, adsorption energies, density of states (DOSs), Mulliken population analysis and molecular orbitals has been broadly studied in this work. Based on the obtained results, it can be concluded that the adsorption on the N-doped nanoparticle is more energetically favorable than the adsorption on the pristine one, representing the higher tendency of N-doped nanoparticles for COx detention, compared to the undoped ones. Therefore, the results indicate that the N-doped TiO2 would be an ideal COx gas sensor in the environment.
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Kulchat, Sirinan, Anusak Chaicham, Sanong Ekgasit, Gamolwan Tumcharern, Thawatchai Tuntulani, and Boosayarat Tomapatanaget. "Self-assembled coordination nanoparticles from nucleotides and lanthanide ions with doped-boronic acid-fluorescein for detection of cyanide in the presence of Cu2+ in water." Talanta 89 (January 2012): 264–69. http://dx.doi.org/10.1016/j.talanta.2011.12.024.

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Chun, Se Min, Dae Hyun Choi, Jong Bae Park, and Yong Cheol Hong. "Optical and Structural Properties of ZnO Nanoparticles Synthesized by CO2 Microwave Plasma at Atmospheric Pressure." Journal of Nanoparticles 2014 (June 23, 2014): 1–7. http://dx.doi.org/10.1155/2014/734256.

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The results of carbon-doped zinc oxide nanoparticles synthesized by CO2 microwave plasma at atmospheric pressure are presented. The 2.45-GHz microwave plasma torch and feeder for injecting Zn granules are used in the synthesis of zinc oxide nanoparticles. The Zn granules (13.5 g/min) were introduced into the microwave plasma by CO2 (5 l/min) swirl gas. The microwave power delivered to the CO2 microwave plasma was 1 kW. The synthesis of carbon-doped zinc oxide nanoparticles was carried out in accordance with CO2 + Zn → carbon-doped ZnO + CO. The synthesized carbon-doped zinc oxide nanoparticles have a high purity hexagonal phase. The absorption edge of carbon-doped zinc oxide nanoparticles exhibited a red shift from a high-energy wavelength to lower in the UV-visible spectrum, due to band gap narrowing. A UV-NIR spectrometer, X-ray diffraction, emission scanning electron-microscopy, energy dispersive X-ray microanalysis, Fourier transform infrared spectroscopy, and a UV-Vis-NIR spectrophotometer were used for the characterization of the as-produced products.
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