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Journal articles on the topic 'Magnetic photocatalyst'

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Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Pujiarti, Yuly, Suyanta Suyanta, and Eko Sri Kunarti. "A Visible Light-Induced Fe3O4/ZnO-Cu Nanocomposite and its Photocatalytic Activities for Rhodamine B Photodegradation." Key Engineering Materials 884 (May 2021): 60–66. http://dx.doi.org/10.4028/www.scientific.net/kem.884.60.

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Synthesis of Fe3O4/ZnO-Cu nanocomposite photocatalyst has been conducted. The synthesis was carried out using the co-precipitation method with the variation of Cu concentration and modification by Fe3O4 magnetic material. As synthesized photocatalysts were characterized using FTIR, XRD, TEM, and SR UV-Visible. Photocatalytic activities of samples were evaluated through Rhodamine B degradation under visible light irradiation. The results showed that a sample with Fe3O4/ZnO-Cu 1% has smaller band gap energy of 2.90 eV and the highest photocatalytic activity than pure ZnO or Fe3O4-modified ZnO (Fe3O4/ZnO-Cu 0%) under visible light. The percentage of Rhodamine B degradation was approximately 89.41% during 120 min of visible light illumination. Moreover, the photocatalyst materials could be easily separated after photocatalysis which is due to the magnetic property of Fe3O4 material. Therefore, Cu-doped ZnO with Fe3O4 modification has been an efficient and effective visible-light-induced photocatalyst in removing non-biodegradable Rhodamine B dyes.
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2

Liu, Robert, Chia Feng Wu, and Ming Der Ger. "Degradation of FBL Dye Wastewater by Magnetic Photocatalysts from Scraps." Journal of Nanomaterials 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/651021.

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Magnetic photocatalyst solves the separation problem between wastewater and TiO2photocatalysts by the application of magnetic field. This research investigates the treatment of simulated FBL dye wastewater using Mn-Zn ferrite/TiO2magnetic photocatalyst. The magnetic Mn-Zn ferrite powder was first produced by a chemical coprecipitation method from spent dry batteries and spent pickling acid solutions. These two scraps comprise the only constituents of Mn-Zn ferrite. The as-synthesized Mn-Zn ferrite was then suspended in a solution containing Ti(SO4)2and urea. Subsequently a magnetic photocatalyst was obtained from the solution by chemical coprecipitation. The prepared Mn-Zn ferrite powder and magnetic photocatalyst (Mn-Zn ferrite/TiO2) were characterized using XRD, EDX, SEM, SQUID, BET, and so forth. The photocatalytic activity of the synthesized magnetic photocatalysts was tested using degradation of FBL dye wastewater. The adsorption and degradation studies by the TOC and ADMI measurement were carried out, respectively. The adsorption isotherm and Langmuir-Hinshelwood kinetic model for the prepared magnetic TiO2were proved to be applicable for the treatment. This research transforms waste into a valuable magnetic photocatalyst.
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3

Zhang, Qing Wei, Wei Xie, Bao Hong Shen, Qiang Xie, and Xiao Liang Li. "Preparation of Magnetically Separable Composite Photocatalyst: Titania Coated Magnetic Activated Carbon." Applied Mechanics and Materials 719-720 (January 2015): 145–56. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.145.

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In the present work, the embedded-type TiO2/magnetic activated carbon (TiO2/MAC) photocatalysts were prepared. The MAC support was manufactured by one-step method and the TiO2coated on the surface of MAC was prepared by sol-gel method. Its crystalline structural properties, morphology, magnetic performances and pore texture were characterized by XRD, SEM, TEM, ultraviolet-visible absorption spectra (Uv-vis), vibrating sample magnetometry (VSM) and N2adsorption isotherm. Characterization results showed that TiO2was highly dispersed on the surface of MAC support in the form of anatase with a particle size of 10 nm. Obtained TiO2/MAC photocatalysts were applied to treatment of contaminant phenol in aqueous solution. The phenol removal percentage by TiO2/MAC photocatalyst is as high as 94% after three cycles. In addition, photocatalytic degradation of phenol in water was examined using TiO2/MAC photocatalysts. The results show that 4wt% Fe3O4was suitable to prepare the support of TiO2/MAC composite. The phenol removal percentage by TiO2/MAC photocatalyst is as high as 94% after three cycles. However, the adsorption capability of photocatalyst disappears after six cycles, while its phenol removal percentage via photodegradation is still as high as 60%. Meanwhile, the used TiO2/MAC photocatalyst after six cycles still maintains good magnetic stability because the majority of magnetic particles are embedded into the bulk of carbon matrix. And the embedded structure could still meet the requirement of magnetic separation by an external magnetic field.
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4

Lu, Ziyang, Zehui Yu, Jinbo Dong, Xinyu Xiong, Lin Gao, Minshan Song, Yang Liu, Di Fan, Yongsheng Yan, and Pengwei Huo. "Enhanced Photocatalytic Activity and Selectivity of a Novel Magnetic PW@PEDOT Imprinted Photocatalyst with Good Reproducibility." Nano 13, no. 02 (February 2018): 1850020. http://dx.doi.org/10.1142/s1793292018500200.

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The novel magnetic PW-doped PEDOT (PW@PEDOT) imprinted photocatalyst with good reproducibility was prepared by the surface imprinting technique and microwave heating method. Due to the existence of PW@PEDOT and imprinted cavity in the imprinted layer, the as-prepared magnetic PW@PEDOT imprinted photocatalyst not only had higher photocatalytic activity, but also had the excellent specific recognition ability for selective photodegradation of TC. This paper proposed a new idea to prepare the imprinted photocatalysts.
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5

Wu, Chun Du, Kun Zheng, and Qing Jie Xie. "The Primary Study of Synthesis and Photocatalytic Activity of ZnO/Nickel-Zinc Ferrite Magnetic Photocatalyst." Advanced Materials Research 955-959 (June 2014): 154–57. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.154.

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Magnetic photocatalyst ZnO/nickel-zinc ferrite powders were synthesized by two-step method: First ,nickel-zinc ferrite powders were prepared by coprecipitation method and then ZnO /nickel-zinc ferrite composite powders were prepared by the homogeneous precipitation method. The as-prepared sample was characterized by X-ray Diffraction (XRD), and Transmission Electron Microscopy (TEM), the photocatalysis of the catalyst was evaluated with methylene blue as decomposition substance and the photocatalytic activity of the material has been tested on decomposable substrate under visible-light in the magnetic photocatalytic wastewater treatment reactor. The results demonstrate that the magnetic photocatalyst ZnO/nickel-zinc ferrite powders exhibit highly efficient visible-light-driven photocatalytic activity, the degradation rate of methylene blue is 84%.
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6

Yan, Li Jun, Yue Cheng, Xiao Juan Yan, and Tan Tan Ge. "Preparation and Photocatalytic Properties of Magnetic TiO2 Compounds." Advanced Materials Research 396-398 (November 2011): 306–10. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.306.

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In this paper, magnetic composite photocatalysts were prepared through depositing TiO2 on the surface of NiFe2O4 by sol-gel method. The composition, structure and magnetism of the samples are tested by XRD, TEM and VSM, respectively. The photoactivity of the as-prepared photocatalysts was investigated by degrading methyl orange under UV light. The effect of NiFe2O4 and SiO2 intermediate layer on the activity of photocatalyst was also studied. It has been found that NiFe2O4 has a negative influence on the photocatalytic activity of magnetic TiO2 compounds. The middle layer of SiO2 can effectively improve the photocatalytic activity of magnetic TiO2 compounds.
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7

Liu, Robert, and H. T. Ou. "Synthesis and Application of Magnetic Photocatalyst of Ni-Zn Ferrite/TiO2from IC Lead Frame Scraps." Journal of Nanotechnology 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/727210.

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IC lead frame scraps with about 18.01% tin, 34.33% nickel, and 47.66% iron in composition are industrial wastes of IC lead frame production. The amount of thousand tons of frame scraps in Taiwan each year is treated as scrap irons. Ni-Zn ferrites used in high frequent inductors and filters are produced from Ni-Zn ferrite powders by pressing and sintering. The amount of several ten thousand tons of ferrites ofNi1-XZnXFe2O4in compositions is consumed annually in the whole world. Therefore, these IC lead frame scraps will be used in this research as raw materials to fabricate magnetic ferrite powders and combined subsequently with titanium sulfate and urea to produce magnetic photocatalysts by coprecipitation for effective waste utilization. The prepared Ni-Zn ferrite powder and magnetic photocatalyst (Ni-Zn ferrite/TiO2) were characterized by ICP, XRF, XRD, EDX, SEM, SQUID, and BET. The photocatalytic activity of synthesized magnetic photocatalysts was tested by FBL dye wastewater degradation. TOC and ADMI measurement for degradation studies were carried out, respectively. Langmuir-Hinshelwood kinetic model of the prepared magnetic TiO2proved available for the treatments. Wastes are transformed to valuable magnetic photocatalysts in this research to solve the separation problem of wastewater and TiO2photocatalysts by magnetic field.
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8

Ojemaye, Mike O., Omobola O. Okoh, and Anthony I. Okoh. "Performance of NiFe2O4-SiO2-TiO2 Magnetic Photocatalyst for the Effective Photocatalytic Reduction of Cr(VI) in Aqueous Solutions." Journal of Nanomaterials 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/5264910.

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Investigation into the reduction of Cr(VI) in aqueous solution was carried out through some batch photocatalytic studies. The photocatalysts used were silica coated nickel ferrite nanoparticles (NiFe2O4-SiO2), nickel ferrite titanium dioxide (NiFe2O4-TiO2), nickel ferrite silica titanium dioxide (NiFe2O4-SiO2-TiO2), and titanium dioxide (TiO2). The characterization of the materials prepared via stepwise synthesis using coprecipitation and sol-gel methods were carried out with the aid of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), and vibrating sample magnetometry (VSM). The reduction efficiency was studied as a function of pH, photocatalyst dose, and contact time. The effects of silica interlayer between the magnetic photocatalyst materials reveal that reduction efficiency of NiFe2O4-SiO2-TiO2 towards Cr(VI) was higher than that of NiFe2O4-TiO2. However, TiO2 was observed to have the highest reduction efficiency at all batch photocatalytic experiments. Kinetics study shows that photocatalytic reduction of Cr(VI) obeyed Langmuir-Hinshelwood model and first-order rate kinetics. Regenerability study also suggested that the photocatalyst materials can be reused.
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9

Ding, Zhiqiang, Yue Liu, Yong Fu, Feng Chen, Zhangpei Chen, and Jianshe Hu. "Magnetically recyclable Ag/TiO2 co-decorated magnetic silica composite for photodegradation of dibutyl phthalate with fluorescent lamps." Water Science and Technology 81, no. 4 (February 15, 2020): 790–800. http://dx.doi.org/10.2166/wst.2020.162.

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Abstract In recent years, industrial contaminants and especially organic pollutions have been threatening both environmental safety and human health. Particularly, dibutyl phthalate (DBP) has been considered as one of the major hazardous contaminants due to its widespread production and ecological toxicities. Consequently, reliable methods toward the efficient and environmentally benign degradation of DBP in wastewater would be very desirable. To this end, a novel magnetically separable porous TiO2/Ag composite photocatalyst with magnetic Fe3O4 particles as the core was developed and successfully introduced to the photocatalytic degradation of DBP under visible irradiation with a fluorescent lamp. The presented work describes the grafting of Ag co-doped TiO2 composite on the silica-modified porous Fe3O4 magnetic particles with a simple and inexpensive chemical co-precipitation method. Through the investigation of the influencing factors including photocatalyst dosage, initial concentration of DBP, solution pH, and H2O2 content, we found that the degradation efficiency could reach 74%. The photodegradation recovery experiment showed that the degradation efficiency of this photocatalyst remained almost the same after five times of reuse. In addition, a plausible degradation process was also proposed involving the attack of active hydroxyl radicals generated from this photocatalysis system and production of the corresponding intermediates of butyl phthalate, diethyl phthalate, dipropyl phthalate, methyl benzoate, and benzoic acid.
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10

Lu, Zhong Li, Hui Zhang, and Xue Duan. "Synthesis, Characterization and Catalytic Property of Nanoscale Magnetic Photocatalyst Titania/Silica/Cobalt Ferrite." Advanced Materials Research 11-12 (February 2006): 611–14. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.611.

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Magnetic material CoFe2O4 was prepared via layered precursor method. Magnetic nanosized photocatalyst TiO2/SiO2/CoFe2O4 was synthesized by hydrolysis titanium bis- ammonium lactato dihydroxide into photoactive TiO2 onto silica-modified CoFe2O4. Based on XRD, FT-IR, VSM analysis and catalytic evaluation, as-synthesized magnetic photocatalyst possess core-shell structure and exhibits evident photodegradation activity for methyl orange.
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11

Smułek, Wojciech, Zuzanna Bielan, Amanda Pacholak, Agata Zdarta, Agnieszka Zgoła-Grześkowiak, Anna Zielińska-Jurek, and Ewa Kaczorek. "Nitrofurazone Removal from Water Enhanced by Coupling Photocatalysis and Biodegradation." International Journal of Molecular Sciences 22, no. 4 (February 22, 2021): 2186. http://dx.doi.org/10.3390/ijms22042186.

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(1) Background: Environmental contamination with antibiotics is particularly serious because the usual methods used in wastewater treatment plants turn out to be insufficient or ineffective. An interesting idea is to support natural biodegradation processes with physicochemical methods as well as with bioaugmentation with efficient microbial degraders. Hence, the aim of our study is evaluation of the effectiveness of different methods of nitrofurazone (NFZ) degradation: photolysis and photodegradation in the presence of two photocatalysts, the commercial TiO2-P25 and a self-obtained Fe3O4@SiO2/TiO2 magnetic photocatalyst. (2) Methods: The chemical nature of the photocatalysis products was investigated using a spectrometric method, and then, they were subjected to biodegradation using the strain Achromobacter xylosoxidans NFZ2. Additionally, the effects of the photodegradation products on bacterial cell surface properties and membranes were studied. (3) Results: Photocatalysis with TiO2-P25 allowed reduction of NFZ by over 90%, demonstrating that this method is twice as effective as photolysis alone. Moreover, the bacterial strain used proved to be effective in the removal of NFZ, as well as its intermediates. (4) Conclusions: The results indicated that photocatalysis alone or coupled with biodegradation with the strain A. xylosoxidans NFZ2 leads to efficient degradation and almost complete mineralization of NFZ.
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12

Zhang, Zhijun, Andong Zhao, Faming Wang, Jinsong Ren, and Xiaogang Qu. "Design of a plasmonic micromotor for enhanced photo-remediation of polluted anaerobic stagnant waters." Chemical Communications 52, no. 32 (2016): 5550–53. http://dx.doi.org/10.1039/c6cc00910g.

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13

Li, Wenjuan, Zhenyu Gu, Fuhua Teng, Jianhai Lu, Shibi Dong, Xiaoping Miao, and Zhongbiao Wu. "The synergetic effect of UV rays on the decomposition of xylene in dielectric barrier discharge plasma and photocatalyst process." European Physical Journal Applied Physics 81, no. 2 (February 2018): 20801. http://dx.doi.org/10.1051/epjap/2018180023.

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The degradation of xylene in the dielectric barrier discharge plasma and photocatalyst process was studied, focusing on the synergetic effect of UV rays from plasma process and external UV lamps on the decomposition of xylene. The results showed that xylene could be decomposed by the discharge process in plasma system, whereas the UV rays from plasma process was very weak. After adding TiO2, the removal efficiency of xylene and energy yield in plasma process were enhanced since energetic particles activated the catalysis of TiO2. The removal efficiency of xylene and energy field in plasma and photocatalyst process combined with external UV lamps were further enhanced attributed to the degradation effect of plasma, the catalysis of TiO2 activated by plasma, the photolysis of UV rays and the photocatalysis of photocatalyst. The synergetic effect of UV rays from external UV lamps was obvious.
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14

Orge, Carla A., O. Salomé G. P. Soares, Patrícia S. F. Ramalho, M. Fernando R. Pereira, and Joaquim L. Faria. "Magnetic Nanoparticles for Photocatalytic Ozonation of Organic Pollutants." Catalysts 9, no. 9 (August 22, 2019): 703. http://dx.doi.org/10.3390/catal9090703.

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Magnetic nanoparticles (MNP) composed of iron oxide (or other metal–FeO cores) coated with carbon produced by chemical vapour decomposition (CVD) were used in the photocatalytic ozonation of oxamic acid (OMA) which we selected as a model pollutant. The incorporation of Ag and Cu on FeO enhanced the efficiency of the process. The carbon phase significantly increased the photocatalytic activity towards the conversion of OMA. As for the synthesis process, raising the temperature of CVD improved the performance of the produced photocatalysts. The obtained results suggested that the carbon phase is directly related to high catalytic activity. The most active photocatalyst (C@FeO_CVD850) was used in the removal of other compounds (dyes, industrial pollutants and herbicides) from water and high mineralization levels were attained. This material was also revealed to be stable during reutilisation.
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15

Ahmad Zubir, Zuhana, Suhaina Mohd Ibrahim, Nor Adhila Muhammad, Mohamad Ibrahim Ahmad, Fei Yee Yeoh, Ting Lee, and Nur Shuhada Shaari. "Synthesis and Characterization of Fe2O3/TiO2/ SiO2 and Fe2O3/TiO2/Activated Carbon Nanocomposite Photocatalysts for Dye Removal." Advanced Materials Research 1133 (January 2016): 523–26. http://dx.doi.org/10.4028/www.scientific.net/amr.1133.523.

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Magnetic nanocomposite photocatalyst is an alternative approach for easy separation of catalyst from the treated water by magnetic force. This paper will discuss the performance of dye degradation using two different supported layer; Silica and Activated Carbon that shield between magnetic iron oxide (Fe2O3) and Titanium dioxide (TiO2) photocatalyst. Photocatalytic activity is measure using Methylene Blue (MB) as indicator. The magnetic nanocomposite was synthesis using an evaporation indused self-assembly (EISA) approach and wet synthesis method. The photocatalyst were then characterized using Vibrating Sample Magnetometer (VSM), Brunauer-Emmet-Teller (BET), and Transmission Electron Microscope (TEM) and the effect of dye degradation were characterizing using Ultraviolet-Visible (UV-VIS) spectroscopy. The result showed that activated carbon is the good supporter compare to silica.
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16

Jing, Hong-Xia, Long-Xiang Li, Jing Huang, Na Li, Wang-Jun Pei, and Xiao-Feng Yang. "Synthesis and characterization of ZnO-TiO2/CoFe2O4 hollow photocatalyst: Magnetic recovery and highly efficient photocatalytic performance." Functional Materials Letters 13, no. 06 (July 22, 2020): 2051027. http://dx.doi.org/10.1142/s1793604720510273.

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TiO2 has been known as an excellent semiconductor photocatalyst for wastewater treatment purposes. But, its visible light efficiency is low and cannot be easily recovered from the reaction mixture. In order to overcome these major disadvantages, a novel hollow magnetically recoverable ZnO-TiO2/CoFe2O4 photocatalyst is synthesized by the sol–gel and layer self-assembly methods. The synthesized photocatalyst was characterized by means of X-ray diffractometer (XRD), Transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM), Fluorescence spectrometer (FL), and UV-Vis/DRS techniques. Complete degradation of rhodamine B is attained in the presence of ZnO-TiO2/CoFe2O4 photocatalyst under the irradiation of ultraviolet and sunlight within 90[Formula: see text]min. The photocatalyst can be repeatedly reused for five times without significantly diminishing of its photocatalytic performance.
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17

Nguyen, Anh, Ngoc Nguyen, Irina Mittova, Nikolai Perov, Valentina Mittova, Thi Hoang, Van Nguyen, Van Nguyen, Vinh Pham, and Xuan Bui. "Crystal structure, optical and magnetic properties of PrFeO3 nanoparticles prepared by modified co-precipitation method." Processing and Application of Ceramics 14, no. 4 (2020): 355–61. http://dx.doi.org/10.2298/pac2004355n.

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In this work, PrFeO3 nanoparticles were synthesized by modified co-precipitation method and annealed at different temperatures up to 850?C. The annealed PrFeO3 nanoparticles have single phase orthorhombic structure and the average particle size of 25-30 nm. Due to the very small particle size the prepared PrFeO3 nanoparticles are capable of being used as photocatalyst materials thanks to their strong adsorption bands at 230-400 nm and 400-800 nm observed from the UV-Vis spectra. Additionally, the PrFeO3 nanoparticles are paramagnetic materials with Hc ~ 10Oe and Mr ~ 0. These findings demonstrate their potential use not only as photocatalysts, but also as magnetic materials.
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18

Nguyen, Anh, Ngoc Nguyen, Irina Mittova, Nikolai Perov, Valentina Mittova, Thi Hoang, Van Nguyen, Van Nguyen, Vinh Pham, and Xuan Bui. "Crystal structure, optical and magnetic properties of PrFeO3 nanoparticles prepared by modified co-precipitation method." Processing and Application of Ceramics 14, no. 4 (2020): 355–61. http://dx.doi.org/10.2298/pac2004355n.

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In this work, PrFeO3 nanoparticles were synthesized by modified co-precipitation method and annealed at different temperatures up to 850?C. The annealed PrFeO3 nanoparticles have single phase orthorhombic structure and the average particle size of 25-30 nm. Due to the very small particle size the prepared PrFeO3 nanoparticles are capable of being used as photocatalyst materials thanks to their strong adsorption bands at 230-400 nm and 400-800 nm observed from the UV-Vis spectra. Additionally, the PrFeO3 nanoparticles are paramagnetic materials with Hc ~ 10Oe and Mr ~ 0. These findings demonstrate their potential use not only as photocatalysts, but also as magnetic materials.
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19

Kahng, Soojin, and Jung Hyeun Kim. "Manufacturing CuxZn1-xS Photocatalysts and Their Solar H2 Production Characteristics with Varying Cu Content." Korean Journal of Metals and Materials 58, no. 12 (December 5, 2020): 907–14. http://dx.doi.org/10.3365/kjmm.2020.58.12.907.

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Solar water splitting is an attractive method for producing hydrogen from renewable natural resources, and heterostructure photocatalysts have been widely investigated for photocatalytic applications. Hetero-component photocatalysts can reduce the charge recombination process by improving electron utilization, and are considered promising candidates for solar water splitting. Amongst various heterostructure systems, combinations of copper and zinc have been advantageous for constructing efficient band potential energy systems. In this work, CuxZn1-xS composite photocatalysts were solvothermally prepared with various copper contents. The morphology of the CuxZn1-xS photocatalysts was examined using scanning electron microscopy, and the crystalline structures were established with an X-ray diffractometer. Atomic analyses of the surface components of the photocatalysts were performed using X-ray photoelectron spectroscopy. UV-Vis spectroscopy and photoluminescence spectroscopy were also used to examine the efficiency of the photocatalysts’ light responses. Brunauer Emmett Teller analyses were employed to characterize the surface area and pore volume of the photocatalysts. Among the various CuxZn1-xS compositions, the highest H2 production rate was determined to be 1122 µmol g<sup>-1</sup> h<sup>-1</sup> from the Cu0.03Zn0.97S photocatalyst. This highest H2 production rate is strongly related to the observed efficient light absorption, and its influence on charge generation. The improvement is mainly attributed to the optimized charge separation and utilization, high visible light absorption, and high surface area of the photocatalyst.
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20

Abd Aziz, Azrina, Shaliza Ibrahim, and Saravanan Pichiah. "Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential." Materials Science Forum 819 (June 2015): 226–31. http://dx.doi.org/10.4028/www.scientific.net/msf.819.226.

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Barium hexaferrite embedded-silica-titania photocatalyst (TiO2-SiO2-BaFe12O19) was synthesized through sol-gel, liquid catalytic phase transformation and solid reaction routes. The magnetic photocatalyst was aimed to harvest the photoenergy from the sunlight, minimize the electron-holes recombination rate, improve the long lifetime charge-carriers transfer to maximize the photocatalytic activity and enhances the separation and reusability of it. The as-synthesized photocatalyst was characterized and the photocatalytic activity was evaluated for the reduction of 2, 4-dichlorophenol (2, 4-DCP) under direct sunlight. The presence of SiO2 interlayer in TiO2-SiO2-BaFe12O19 prevents the phase transformation of magnetic core. TiO2-SiO2-BaFe12O19 benefits the magnetic separation with appreciable magnitude of coercivity (5035.6 Oe) and saturation magnetization (18.8256E-3 emu/g), respectively. The ferrite ions from the magnetic core which dispersed into TiO2 matrix exhibited an evident shift of the absorption in the visible region. This was again confirmed with the reduced band gap energy of 1.90 eV. Furthermore, TiO2-SiO2-BaFe12O19 destructed 100% of 2, 4-DCP compound within 150 min under very bright sunlight with an average irradiance of 820.8 W/m2 (results not shown). The embedding of BaFe12O19 with a SiO2 layer onto TiO2 nanocrystals contributed for an excellent solar-light utilization and ease magnetic separation of the nanosized photocatalyst.
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Haw, Choonyian, Weesiong Chiu, Saadah Abdul Rahman, Poisim Khiew, Shahidan Radiman, Roslan Abdul Shukor, Muhammad Azmi Abdul Hamid, and Naziri Ghazali. "The design of new magnetic-photocatalyst nanocomposites (CoFe2O4–TiO2) as smart nanomaterials for recyclable-photocatalysis applications." New Journal of Chemistry 40, no. 2 (2016): 1124–36. http://dx.doi.org/10.1039/c5nj02496j.

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22

Sun, Dong Feng, Zhi Jian Xu, Kai Wang, Gui Fu Dong, and Xiu Ling Zhang. "Preparation and Photocatalytic Properties of TiO2-CoFe2O4 Magnetic Composite Photocatalyst." Advanced Materials Research 391-392 (December 2011): 1488–92. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.1488.

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A TiO2-CoFe2O4composite photocatalyst was prepared by one-step method with ultrasound technique using TiCl4, trivalent iron salt and divalent cobalt salts as precursors. The properties of the sample were investigated by XRD, TEM and VSM techniques. The photocatalyst activity was evaluated by using methyl orange aqueous solution as the model contaminant under the sunlight. The results showed that the TiO2-CoFe2O4composite photocatalyst exhibited good magnetic properties and the saturation magnetization was 212Gs. The microstructure of samples consists of the TiO2with anatase phase and CoFe2O4with spinel structure. The size of TiO2-CoFe2O4particles is approximately 20 nm in diameter. The photocatalyst test showed highly photocatalytic activity in the sunlight.
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23

Lagare, Jeanne Phyre, Mark Anthony M. Lavapiez, Joel H. Jorolan, Arnold C. Alguno, and Rey Y. Capangpangan. "Facile Synthesis and Characterization of Magnetic Nanophotocatalyst for Photocatalytic Degradation of Cyanide." Solid State Phenomena 294 (July 2019): 17–23. http://dx.doi.org/10.4028/www.scientific.net/ssp.294.17.

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This paper reports on the synthesis and application of Fe3O4/TiO2 nanocomposite. In situ attachment of TiO2 coating to the surface of the magnetic nanoparticles (Fe3O4) was attained by direct condensation of titanium precursors. Characterization result suggests that the average particle size of the synthesized nanocomposite is 10-15 nm. Also, FT-IR result confirms the presence of TiO2 layer in the surface of the magnetic nanoparticles. Furthermore, the prepared Fe3O4/TiO2 nanocomposite was utilized as an active magnetic nanophotocatalyst for the degradation of cyanide. Results show that even at 5.0 mg of Fe3O4/TiO2 photocatalyst, higher cyanide removal efficiency (91%) was obtained when 60 ppm CN- was incubated with the photocatalyst for 30 minutes. Likewise, it has been demonstrated that the synthesized magnetic nanophotocatalyst can be used to degrade cyanide using sunlight as the natural light source. A 94% cyanide removal efficiency was obtained when the sample was incubated with the synthesized magnetic nanophotocatalyst for 120 minutes under sunlight irradiation. Importantly, the prepared magnetic photocatalyst can be re-used several times (up to 5 cycles) without significant changes in the cyanide removal efficiency.
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Bertrams, Maria-Sophie, and Christoph Kerzig. "Converting p-terphenyl into a novel organo-catalyst for LED-driven energy and electron transfer photoreactions in water." Chemical Communications 57, no. 55 (2021): 6752–55. http://dx.doi.org/10.1039/d1cc01947c.

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A robust photocatalyst for reactions under particularly sustainable conditions has been discovered. The importance of its photoactive triplet state has been elucidated by combining optical spectroscopy with lab-scale photocatalysis.
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Liu, Xinlin, Yingying Qin, Yongsheng Yan, and Peng Lv. "The fabrication of CdS/CoFe2O4/rGO photocatalysts to improve the photocatalytic degradation performance under visible light." RSC Advances 7, no. 64 (2017): 40673–81. http://dx.doi.org/10.1039/c7ra07202c.

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A magnetic photocatalyst, CdS/CoFe2O4/rGO, has been successfully prepared via a simple hydrothermal method. The photocatalytic activity of the as-obtained composite photocatalyst was evaluated using the degradation of tetracycline.
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Mérai, László, Ágota Deák, Dániel Sebők, Ákos Kukovecz, Imre Dékány, and László Janovák. "A Stimulus-Responsive Polymer Composite Surface with Magnetic Field-Governed Wetting and Photocatalytic Properties." Polymers 12, no. 9 (August 21, 2020): 1890. http://dx.doi.org/10.3390/polym12091890.

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With the increasing demand for liquid manipulation and microfluidic techniques, surfaces with real-time tunable wetting properties are becoming the focus of materials science researches. In this study, we present a simple preparation method for a 0.5–4 µm carbonyl iron (carbonyl Fe) loaded polydimethylsiloxane (PDMS)-based magnetic composite coating with magnetic field-tailored wetting properties. Moreover, the embedded 6.3–16.7 wt.% Ag-TiO2 plasmonic photocatalyst (d~50 nm) content provides additional visible light photoreactivity to the external stimuli-responsive composite grass surfaces, while the efficiency of this photocatalytic behavior also turned out to be dependent on the external magnetic field. The inclusion of the photocatalyst introduced hierarchical surface roughness to the micro-grass, resulting in the broadening of the achievable contact and sliding angle ranges. The photocatalyst-infused coatings are also capable of catching and releasing water droplets, which alongside their multifunctional (photocatalytic activity and tunable wetting characteristics) nature makes surfaces of this kind the novel sophisticated tools of liquid manipulation.
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Heredia, Carla Lorena, dgrado Ling Sham, and lsa Mónica Farfán-Torres. "Tartrazine degradation by supported TiO2on magnetic particles." Matéria (Rio de Janeiro) 20, no. 3 (September 2015): 668–75. http://dx.doi.org/10.1590/s1517-707620150003.0069.

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ABSTRACTMagnetic beads were obtained by dropping a solution of sodium alginate containing magnetite particles into a CaCl2 solution. TiO2anatase particles were synthetized by a sol-gel method at low temperature (75 °C), and were supported on magnetic beads to obtain the magnetic photocatalyst, MC. Magnetite particles and magnetic photocatalyst were characterized by nitrogen adsorption (BET, surface area), their morphology observed by scanning electronic microscopy (SEM) and TiO2 phase was analyzed by means of Raman spectroscopy. The photocatalytic activity of MC was evaluated on tartrazine degradation, highly used in food industry, at two different concentrations. Finally, MC stability was evaluated by reusability assays in several subsequent cycles. Results showed a good photocatalytic response for tartrazine degradation, especially at low concentration, easy recuperation and appropriate perform in the reusability of MC.
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Chin, Ching Ju Monica, Yu Jie Chang, Guo Jie Weng, and Chia Yu Shen. "Synthesis of Magnetic TiO2 Nanoparticles as Bactericidal Photocatalyst." Advanced Materials Research 123-125 (August 2010): 260–63. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.260.

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The magnetic photocatalysts can provide both a high specific surface area and an alternative for recovering used catalyst from treated water by the application of a magnetic field. In this study, the Fe3O4 nanoparticles were synthesized by co-precipitation. After chemical co-precipitation of ferric and ferrous solution under alkaline condition, the suspension of magnetite nanoparticles were then mixed with TEOT (Titanium (Ⅳ) ethoxide) for sol-gel coating. The separated MPCs (magnetic photocatalyst nanoparticle) were then dried and calcined in 400oC. Magnetic properties of MPCs were identified by superconducting quantum interference device magnetometer (SQUID). The bactericidal ability of synthesized MPCs was evaluated by counting the residual numbers of E. coli after irradiation under a light intensity of 1.0 mW/cm2 at 365 nm. The results show that the MPCs were both anatase and had good crystallinity with clear peaks and insignificant noises after calcination. The SQUID test also reveals that calcination only affects the magnetic susceptibility of the MPC nanoparticles slightly (< 8%). The bactericidal ability of the synthesized MPCs was compared with the commercial TiO2 nanoparticle DegussaTM P25; P25 provided a faster inactivation rate for E. coli in water than MPCs did at the same dosage. The calculated photocatalytic bactericidal rate by P25 is about 3.6 times faster than that by MPCs synthesized in this work. However, the bactericidal rate of magnetic TiO2 synthesized in this work was 5 times than that of other MPCs in the literature. The particles size and surface area of MPCs from this work were about 135 nm and 210 m2/g, respectively. The MPCs from this work have much smaller size and larger surface area; hence there are more active sites for bactericidal reaction.
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29

Lee, Chang-Woo, Soon-Gil Kim, Sung-Hee Yun, Jai-Sung Lee, and Yong-Ho Choa. "Synthesis of TiO2-Fe2O3Nanocomposite Powders for Magnetic Photocatalyst." Korean Journal of Materials Research 15, no. 8 (August 1, 2005): 508–13. http://dx.doi.org/10.3740/mrsk.2005.15.8.508.

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30

Farhadian, Mousa, and Mahmood Kazemzad. "Photocatalytic Degradation of Malachite Green by Magnetic Photocatalyst." Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 46, no. 3 (October 17, 2015): 458–63. http://dx.doi.org/10.1080/15533174.2014.988802.

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31

Zhang, Ling, Wenzhong Wang, Lin Zhou, Meng Shang, and Songmei Sun. "Fe3O4 coupled BiOCl: A highly efficient magnetic photocatalyst." Applied Catalysis B: Environmental 90, no. 3-4 (August 2009): 458–62. http://dx.doi.org/10.1016/j.apcatb.2009.04.005.

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32

Kunarti, E. S., R. Roto, S. Sutarno, I. S. Budi, and M. Mardiansyah. "Effective Photocatalytic Degradation of Nitrobenzene by Magnetite Modified Titania Composite." Asian Journal of Chemistry 33, no. 6 (2021): 1319–24. http://dx.doi.org/10.14233/ajchem.2021.23137.

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Magnetic photocatalyst of magnetite modified titania composite Fe3O4/TiO2 was prepared by co-precipitation and sol-gel methods followed by calcination at 450 ºC. The produced material was confirmed by XRD, FTIR spectrophotometer, vibrating sample magnetometer and transmission electron microscope. The solid material was tested as a photocatalyst for degradation of nitrobenzene under UV light irradiation. The progress of degradation of nitrobenzene was monitored by using a UV-visible spectrophotometer. The photodegradation of nitrobenzene could be best realized at a medium pH of 7 and 120 min of irradiation. The reaction rate constant of nitrobenzene degradation catalyzed by TiO2 and Fe3O4/TiO2 solids were found to be 0.0058 min-1 and 0.0092 min-1, respectively. The photocatalyst was recoverable by use of a magnetic bar and reusable.
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Bielan, Zuzanna, Agnieszka Sulowska, Szymon Dudziak, Katarzyna Siuzdak, Jacek Ryl, and Anna Zielińska-Jurek. "Defective TiO2 Core-Shell Magnetic Photocatalyst Modified with Plasmonic Nanoparticles for Visible Light-Induced Photocatalytic Activity." Catalysts 10, no. 6 (June 15, 2020): 672. http://dx.doi.org/10.3390/catal10060672.

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In the presented work, for the first time, the metal-modified defective titanium(IV) oxide nanoparticles with well-defined titanium vacancies, was successfully obtained. Introducing platinum and copper nanoparticles (NPs) as surface modifiers of defective d-TiO2 significantly increased the photocatalytic activity in both UV-Vis and Vis light ranges. Moreover, metal NPs deposition on the magnetic core allowed for the effective separation and reuse of the nanometer-sized photocatalyst from the suspension after the treatment process. The obtained Fe3O4@SiO2/d-TiO2-Pt/Cu photocatalysts were characterized by X-ray diffractometry (XRD) and specific surface area (BET) measurements, UV-Vis diffuse reflectance spectroscopy (DR-UV/Vis), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Further, the mechanism of phenol degradation and the role of four oxidative species (h+, e−, •OH, and •O2−) in the studied photocatalytic process were investigated.
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34

Zhang, Zhaodi, Longjun Xu, and Chenglun Liu. "Preparation and characterization of composite magnetic photocatalyst MnxZn1−xFe2O4/β-Bi2O3." RSC Advances 5, no. 97 (2015): 79997–80004. http://dx.doi.org/10.1039/c5ra11914f.

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Composite magnetic photocatalyst MnxZn1−xFe2O4/β-Bi2O3 was synthesized by a dip-calcination method using manganese zinc ferrite as a magnetic substrate.
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35

Li, Wei, Yi Tian, Peitao Li, Baoliang Zhang, Hepeng Zhang, Wangchang Geng, and Qiuyu Zhang. "Synthesis of rattle-type magnetic mesoporous Fe3O4@mSiO2@BiOBr hierarchical photocatalyst and investigation of its photoactivity in the degradation of methylene blue." RSC Advances 5, no. 59 (2015): 48050–59. http://dx.doi.org/10.1039/c5ra06894k.

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36

Fu, Yen-Pei, Wen-Ku Chang, Hsin-Chao Wang, Chung-Wen Liu, and Cheng-Hsiung Lin. "Synthesis and characterization of anatase TiO2 nanolayer coating on Ni–Cu–Zn ferrite powders for magnetic photocatalyst." Journal of Materials Research 25, no. 1 (January 2010): 134–40. http://dx.doi.org/10.1557/jmr.2010.0015.

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In the current research, we successfully prepared TiO2/Ni–Cu–Zn ferrite composite powder for magnetic photocatalyst. The core Ni–Cu–Zn ferrite powder was synthesized using the steel pickling liquor and the waste solution of electroplating as the starting materials. The shell TiO2 nanocrystal was prepared by sol-gel hydrolysis precipitation of titanium isopropoxide [Ti(OC3H7)4] on the Ni–Cu–Zn ferrite powder followed by heat treatment. From transmission electron microscopy (TEM) image, the thickness of the titania shell was found to be approximately 5 nm. The core of Ni–Cu–Zn ferrite is spherical or elliptical shape, and the particle size of the core is in the range of 70–110 nm. The magnetic Ni–Cu–Zn ferrite nanopowder is uniformly encapsulated in a titania layer forming core-shell structure of TiO2/Ni–Cu–Zn ferrite powder. The degradation efficiency for methylene blue (MB) increases with magnetic photocatalyst (TiO2/Ni–Cu–Zn ferrite powder) content. When the magnetic photocatalyst content is 0.40 g in 150 mL of MB, the photocatalytic activity reached the largest value. With a further increase in the content of magnetic photocatalyst, the degradation efficiency slightly decreased. This occurs because the ultraviolet (UV) illumination is covered by catalysts, which were suspended in the methylene blue solution and resulted in the inhibition in the photocatalytic reaction. The photocatalytic degradation result for the relationship between MB concentration and illumination revealed a pseudo first-order kinetic model of the degradation with the limiting rate constant of 1.717 mg/L·min and equilibrium adsorption constant 0.0627 L/mg. Furthermore, the Langmuir–Hinshelwood model can be used to describe the degradation reaction, which suggests that the rate-determining step is surface reaction rather than adsorption is in photocatalytic degradation.
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37

Xu, Jing-Yin, Xin-Ping Zhai, Lin-Feng Gao, Peng Chen, Min Zhao, Hong-Bin Yang, Deng-Feng Cao, Qiang Wang, and Hao-Li Zhang. "In situ preparation of a MOF-derived magnetic carbonaceous catalyst for visible-light-driven hydrogen evolution." RSC Advances 6, no. 3 (2016): 2011–18. http://dx.doi.org/10.1039/c5ra23838b.

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38

Yang, Xiaofeng, Lei Zhang, Zhiping Chen, Hongxia Jing, Yuzhe Chen, and Qiaoling Li. "Synthesis of magnetic photocatalyst and sensitization properties of polypyrrole." Science and Engineering of Composite Materials 23, no. 3 (May 1, 2016): 269–75. http://dx.doi.org/10.1515/secm-2014-0035.

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AbstractIn order to solve the difficulty of separation and recycling of TiO2 and its lower utilization of solar radiation, a new type of TiO2 photocatalyst, which was sensitized by polypyrrole (PPy) and carried by self-made modified Fe3O4, named PPy-TiO2/M-Fe3O4, was fabricated successfully by combining suspension dispersion and in situ polymerization. The structure of photocatalyst and Fe3O4 was characterized using X-ray diffraction, the Fourier transmission infrared spectrometer, and scanning electron microscopy. Light response property was tested by ultraviolet-visible diffuse reflectance spectra. Photocatalytic activity was evaluated with methyl orange as the degradation substance under different light radiation. Magnetic recovery property was investigated by using vibrating sample magnetometer and gravimetric analysis methods. The results showed that due to sensitization of PPy, the light response scope of PPy-TiO2/M-Fe3O4 was broadened to 451 nm and the degradation rate of methyl orange had been increased by 32.5% under the same conditions. Meanwhile, the recovery rate of PPy-TiO2/M-Fe3O4 remained above 97.9% after five cycles.
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39

Kurinobu, S., K. Tsurusaki, Y. Natui, M. Kimata, and M. Hasegawa. "Decomposition of pollutants in wastewater using magnetic photocatalyst particles." Journal of Magnetism and Magnetic Materials 310, no. 2 (March 2007): e1025-e1027. http://dx.doi.org/10.1016/j.jmmm.2006.11.072.

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40

Kim, Lyung-Joo, Jun-Won Jang, and Jae-Woo Park. "Nano TiO2-functionalized magnetic-cored dendrimer as a photocatalyst." Applied Catalysis B: Environmental 147 (April 2014): 973–79. http://dx.doi.org/10.1016/j.apcatb.2013.10.024.

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41

Fu, Congzhi, Xijun Liu, Yuwei Wang, Li Li, and Zihao Zhang. "Preparation and characterization of Fe3O4@SiO2@TiO2–Co/rGO magnetic visible light photocatalyst for water treatment." RSC Advances 9, no. 35 (2019): 20256–65. http://dx.doi.org/10.1039/c9ra04002a.

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With its low cost, high photocatalytic activity, high chemical stability and easy magnetic separation, Fe3O4@SiO2@TiO2–Co/rGO magnetic photocatalyst has a good application potential.
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42

Tang, Wenshu, Yu Su, Xiaoxin Wang, Qi Li, Shian Gao, and Jian Ku Shang. "Synthesis of a superparamagnetic MFNs@SiO2@Ag4SiW12O40/Ag composite photocatalyst, its superior photocatalytic performance under visible light illumination, and its easy magnetic separation." RSC Adv. 4, no. 57 (2014): 30090–99. http://dx.doi.org/10.1039/c4ra03711a.

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43

Nasiri, Alireza, Fatemeh Tamaddon, Mohammad Hossein Mosslemin, Majid Amiri Gharaghani, and Ali Asadipour. "Magnetic nano-biocomposite CuFe2 O4 @methylcellulose (MC) prepared as a new nano-photocatalyst for degradation of ciprofloxacin from aqueous solution." Environmental Health Engineering and Management 6, no. 1 (February 28, 2019): 41–51. http://dx.doi.org/10.15171/ehem.2019.05.

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Background: Antibiotics such as ciprofloxacin (CIP) are even more important in bacterial resistance, even at low concentrations. The aim of this research was to synthesize CuFe2 O4 @methylcellulose (MC) as a new nano-photocatalyst for degradation of CIP from aqueous solution. Methods: The nano-photocatalyst (CuFe2 O4 @MC) was characterized by FESEM, energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM). Powder XRD and EDS analysis confirmed the formation of pure-phase spinel ferrites. After CuFe2 O4 @MC characterization, the effective parameters in removal efficiency of CIP such as reaction time, initial antibiotic concentration, pH, photocatalyst loading, and degradation kinetic were investigated and conditions were optimized. Then, CIP degradation experiments were conducted on the real sample in the optimal conditions. The removal of chemical oxygen demand (COD) was determined under optimum conditions. Results: The structural characterization of the magnetic nanobiocomposite showed that it is in nanoscale, ferromagnetic property, and thermal stability. The optimal conditions were obtained at pH = 7, irradiation time (90 minutes), photocatalyst loading (0.2 g), and initial concentration of CIP (3 mg/L). The removal efficiency of CIP in the optimal conditions was obtained as 80.74% and 72.87% from the synthetic and real samples, respectively. The removal of COD was obtained as 68.26% in this process. The evaluation of kinetic linear models showed that the photocatalytic degradation process was fitted by pseudo-first order kinetic model and Langmuir-Hinshelwood. CuFe2 O4 @MC photocatalyst had a good stability and reusability for the fourth runs. Conclusion: The photocatalytic degradation of CIP from aqueous media with CuFe2 O4 @MC photocatalyst has a high efficiency, which can be used in the treatment of pharmaceutical wastewaters.
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44

Bian, Yuecheng, Ganhong Zheng, Wei Ding, Lin Hu, and Zhigao Sheng. "Magnetic field effect on the photocatalytic degradation of methyl orange by commercial TiO2 powder." RSC Advances 11, no. 11 (2021): 6284–91. http://dx.doi.org/10.1039/d0ra08359c.

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45

Peng, Jiayi, Ziyang Lu, Jing Lu, Zhongfei Ma, Minshan Song, Xinlin Liu, Pengwei Huo, Hongjun Dong, Xuchun Qiu, and Song Han. "Enhanced selectivity for photodegrading ciprofloxacin by a magnetic photocatalyst modified with a POPD–CdS heterojunction embedded imprinted layer." New Journal of Chemistry 43, no. 6 (2019): 2610–23. http://dx.doi.org/10.1039/c8nj05710a.

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A POPD–CdS heterojunction embedded magnetic imprinted photocatalyst achieves the purpose of selective photodegradation of ciprofloxacin and effectively suppresses the secondary pollution caused by CdS photocorrosion.
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46

QIU, W., Y. ZHENG, and K. HARALAMPIDES. "Study on a novel POM-based magnetic photocatalyst: Photocatalytic degradation and magnetic separation." Chemical Engineering Journal 125, no. 3 (January 15, 2007): 165–76. http://dx.doi.org/10.1016/j.cej.2006.08.025.

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47

Zhang, Qiu-Yan, Fen-Jun Liu, Ping-An Gao, Xuan-Ming Zhao, Li Wang, and Hong-Xia Guo. "Magnetic properties and photocatalytic mechanism of magnetic separable M-type strontium ferrite photocatalyst." Materials Research Express 6, no. 9 (July 19, 2019): 095520. http://dx.doi.org/10.1088/2053-1591/ab31a0.

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48

Wang, Yuan, Shunli Wang, Yabiao Wu, Zinan Wang, Honghao Zhang, Zongsheng Cao, Jie He, et al. "A α-Fe2O3/rGO magnetic photocatalyst: Enhanced photocatalytic performance regulated by magnetic field." Journal of Alloys and Compounds 851 (January 2021): 156733. http://dx.doi.org/10.1016/j.jallcom.2020.156733.

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49

Xu, Yuanguo, Teng Zhou, Shuquan Huang, Meng Xie, Hongping Li, Hui Xu, Jiexiang Xia, and Huaming Li. "Preparation of magnetic Ag/AgCl/CoFe2O4 composites with high photocatalytic and antibacterial ability." RSC Advances 5, no. 52 (2015): 41475–83. http://dx.doi.org/10.1039/c5ra04410c.

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50

Wang, Zhen, Lu Yin, Ziwen Chen, Guowang Zhou, and Huixiang Shi. "Photodegradation of Methyl Orange Using Magnetically Recoverable AgBr@Ag3PO4/Fe3O4Photocatalyst under Visible Light." Journal of Nanomaterials 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/150150.

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A novel magnetically recoverable AgBr@Ag3PO4/Fe3O4hybrid was prepared by a simple deposition-precipitation approach and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-Vis diffuse reflectance spectroscopy (DRS). The results revealed that the photocatalytic activity and stability of AgBr@Ag3PO4/Fe3O4composite toward decomposition of methyl orange (MO) dye were superior to those of pure Ag3PO4under visible light irradiation. The photocatalytic activity enhancement of AgBr@Ag3PO4/Fe3O4is closely related to the efficient separation of electron-hole pairs derived from the matching band potentials between Ag3PO4and AgBr, as well as the good conductivity of Fe3O4. Moreover, the photocatalyst could be easily separated by applying an external magnetic field due to its magnetic property. The quenching effects of different scavengers proved that active h+and played the major role for the MO degradation. This work would provide new insight for the construction of visible light responsible photocatalysts with high performance, good stability, and recoverability.
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