Добірка наукової літератури з теми "Bi₂O₂CO₃ nanosheets"

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Статті в журналах з теми "Bi₂O₂CO₃ nanosheets"

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Peng, Yin, Qian Zhang, and Peng-Fei Kan. "Synthesis of a novel one-dimensional Bi2O2CO3–BiOCl heterostructure and its enhanced photocatalytic activity." CrystEngComm 22, no. 41 (2020): 6822–30. http://dx.doi.org/10.1039/d0ce01181a.

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Анотація:
A novel one-dimensional Bi2O2CO3–BiOCl heterostructure was synthesized. BiOCl nanosheets uniformly and vertically grew onto the Bi2O2CO3 porous rods via crystallographic oriented epitaxial nucleation and growth. Bi2O2CO3–BiOCl displayed excellent photocatalytic activity.
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Wang, Fang, Ziyan Zhao, Kunhao Zhang, Fan Dong та Ying Zhou. "Topochemical transformation of low-energy crystal facets to high-energy facets: a case from Bi2O2CO3 {001} facets to β-Bi2O3 {001} facets with improved photocatalytic oxidation of NO". CrystEngComm 17, № 32 (2015): 6098–102. http://dx.doi.org/10.1039/c5ce01035g.

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Анотація:
Photocatalytically active β-Bi2O3 nanosheets exposed with active {001} facets were facilely prepared through annealing Bi2O2CO3 with thermal stable {001} facets.
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Qin, Hangdao, Yingchang Yang, Wei Shi, and Yuanbin She. "Few-layer Bi2O2CO3 nanosheets derived from electrochemically exfoliated bismuthene for the enhanced photocatalytic degradation of ciprofloxacin antibiotic." RSC Advances 11, no. 23 (2021): 13731–38. http://dx.doi.org/10.1039/d1ra00528f.

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Few-layer 2D Bi2O2CO3 nanosheets derived from electrochemically cathodic exfoliated bismuthene exhibit enhanced photocatalytic degradation of the ciprofloxacin antibiotic.
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An, Xiaowei, Shasha Li, Xiaoqiong Hao, Xiao Du, Tao Yu, Zhongde Wang, Xiaogang Hao, Abuliti Abudula, and Guoqing Guan. "The in situ morphology transformation of bismuth-based catalysts for the effective electroreduction of carbon dioxide." Sustainable Energy & Fuels 4, no. 6 (2020): 2831–40. http://dx.doi.org/10.1039/d0se00228c.

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Анотація:
An in situ morphological transformation phenomenon accompanied by petal-shaped Bi2O2CO3 nanosheets formation has been observed to help improving electrocatalytic performance.
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Luo, Haidong, Binxia Zhao, Mengran Zhang, Yuling Liu, Ruixuan Han, and Linxue Liu. "Novel Co-doped Fe3O4/Bi2WO6 core–shell magnetic photocatalysts with enhanced photocatalytic degradation of contaminants." New Journal of Chemistry 43, no. 38 (2019): 15335–41. http://dx.doi.org/10.1039/c9nj03918j.

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Yang, Li-Min, Guo-Ying Zhang, Hai-Rong Wang, Xue Bai, Xing-Qi Shen, Jing-Wang Liu, and Dong-Zhao Gao. "Mild synthesis of {001} facet predominated Bi2O2CO3 clusters with outstanding simulated sunlight photocatalytic activities." CrystEngComm 18, no. 20 (2016): 3683–95. http://dx.doi.org/10.1039/c6ce00435k.

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Анотація:
Bi2O2CO3 clusters built up of ultrathin nanosheets with predominated {001} facets were facilely synthesized via a template-free hydrothermal strategy at a mild temperature of 60 °C and exhibit excellent photocatalytic activity.
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Selvamani, Thangavel, Balasubramaniam Gnana Sundara Raj, Sambandam Anandan, Jerry J. Wu, and Muthupandian Ashokkumar. "Synthesis of morphology-controlled bismutite for selective applications." Physical Chemistry Chemical Physics 18, no. 11 (2016): 7768–79. http://dx.doi.org/10.1039/c5cp07523h.

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Анотація:
Bismutite (Bi2O2CO3) possessing diverse morphologies, namely, nanosheets, nanodiscs and nanoplatelets, was synthesized by a simple controllable method shows excellent materials as adsorbents and photocatalysts for wastewater treatment with supercapacitor activities for energy applications.
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SUN, PENG, YUJIAN JIN, YUNXUAN ZHAO, JUAN XU, MINDONG CHEN, WENQING YAO, YONGFA ZHU, and FEI TENG. "NOVEL HIERARCHICAL NANORODS OF SILICON-DOPED Bi2O2CO3 AND ITS PHOTOCATALYTIC ACTIVITY." Nano 09, no. 08 (December 2014): 1450094. http://dx.doi.org/10.1142/s1793292014500945.

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The silicon-doped Bi 2 O 2 CO 3 nanorods with the interesting hierarchical structure are synthesized by a simple hydrothermal method. The samples are characterized by XRD, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), Ultraviolet-visible diffuse reflectance spectra (UV-DRS) and nitrogen sorption isotherms. It is found that with the increase of silicon content, the XRD peak of the sample significantly shifts toward a low diffraction angle and the particle morphologies change from nanosheets, nanoflowers to hierarchical nanorods. Moreover, the silicon-doped Bi 2 O 2 CO 3 hierarchical nanorods exhibit improved photocatalytic degradation activities for different types of dyes under simulated solar light irradiation. The improved activity has been mainly attributed to the unique hierarchical nanorods structure and the formation of Si – O – Bi bonds.
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Zhang, Lili, Zhiqiang Wang, Tong Li, Chun Hu, and Min Yang. "Ultrathin Bi4O5Br2 nanosheets with surface oxygen vacancies and strong interaction with Bi2O2CO3 for highly efficient removal of water contaminants." Environmental Science: Nano 9, no. 4 (2022): 1341–52. http://dx.doi.org/10.1039/d1en01024g.

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Wang, Bo, Jingyi Wang, Yan Zhang, Yi Mei, and Peichao Lian. "Electrochemical performance of Bi 2 O 2 CO 3 nanosheets as negative electrode material for supercapacitors." Ceramics International 43, no. 12 (August 2017): 9310–16. http://dx.doi.org/10.1016/j.ceramint.2017.04.092.

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Дисертації з теми "Bi₂O₂CO₃ nanosheets"

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Nominé, Anna V. "Synthesis of Bi₂O₂CO₃ nanosheets by electrical discharges in liquids for photocatalytic and nanoelectronic applications." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0357.

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Ce travail fournit des informations sur la synthèse de feuillets nanométriques ultrafins composés de Bi₂O₂CO₃, ci-après dénommé BOC. La synthèse est réalisée par une technique rapide et simple connue sous le signe EDDL correspondant au procédé de décharges électriques dans les liquides diélectriques. Pour assurer la reproductibilité de la synthèse, une méthode de prétraitement impliquant la gravure d'électrodes de bismuth avec du Nital a été employée. Le processus choisi consiste à initier des décharges électriques entre ces électrodes alors qu'elles sont immergées soit dans l'azote liquide, soit dans l'eau. Fait remarquable, les deux liquides conduisent à des nanostructures identiques, une similitude validée par spectroscopie d'émission optique, technique qui a permis de confirmer la nature métallique de la décharge dans les deux milieux. Après cette étape, les nanofeuillets subissent une oxydation et une carbonatation rapides lorsqu'ils sont exposés à l'air. Le mécanisme de croissance proposé est étroitement lié au mécanisme connu sous le nom de « ledge mechanism », en raison de la présence de « kinks » et de « jogs » clairement visibles le long des bords des nanofeuillets. Ces nanostructures bidimensionnelles émergent d'abord à la surface de la cathode et croissent ensuite verticalement. Cette croissance anisotrope est rendue possible par l'assistance ionique dans les régions qui ressemblent à des motifs en forme de peigne formés pendant l'étape de gravure chimique, condition préalable nécessaire à une forte reproductibilité du processus de croissance. La caractérisation cristallographique détaillée des nanofeuillets de BOC a été réalisée à l'aide d'une série de techniques, notamment la microscopie électronique en transmission (TEM), la microscopie électronique en transmission à balayage (STEM), la microscopie électronique en transmission à haute résolution (HRTEM), la spectroscopie de rayons X à dispersion d'énergie (EDX), la diffraction d'électrons en aire sélectionnée (SAED), la diffraction d'électrons en faisceau convergent (CBED), la microscopie électronique en transmission filtrée en énergie (EFTEM) et la spectroscopie de perte d'énergie des électrons (EELS). L'étude révèle que la structure cristallographique du BOC est conforme au groupe spatial I4/mmm, avec des paramètres de réseau a=3,91 Å et c=13,77 Å, une détermination qui a été confirmée par diffraction des rayons X (DRX). L'étude clarifie également l'origine potentielle des taches satellites qui sont régulièrement observées dans les motifs SAED le long de l'axe de zone [001]. Dans cette étude, ces taches ont été principalement attribuées à deux phénomènes : la diffraction multiple et les transformations locales ordre-désordre qui se produisent dans la structure cristalline du BOC. Cette transformation implique une transition d'une structure quadratique centrée vers un réseau primitif de Bravais. Afin d'évaluer leur utilité pratique, nous avons mesuré la performance photocatalytique des nanofeuillets de BOC synthétisés à l'aide de la méthode EDDL et nous avons constaté qu'elle était comparable à elle de BOCs obtenus par d'autres méthodes. En outre, nous avons évalué la performance électronique des BOC dans le but de découvrir leur potentiel dans les applications liées à des nanodispositifs
This work provides information on the synthesis of ultrathin nanosheets composed of Bi₂O₂CO₃, hereafter referred to as BOC. The synthesis is achieved through the rapid and straightforward technique known as Electrical Discharges in Dielectric Liquids (EDDL). To ensure the reproducibility of the synthesis, a pre-treatment method involving the etching of bismuth electrodes with Nital was employed. The chosen process entails initiating electrical discharges between these electrodes while submerged in either liquid nitrogen or water. Remarkably, both liquids produced identical nanostructures, a similarity validated by optical emission spectroscopy, which confirmed the metallic nature of the discharge in both environments. Following this stage, the nanosheets undergo rapid oxidation and carbonation upon exposure to air. The proposed growth mechanism is closely linked to the ledge mechanism, considering the presence of clearly visible kinks and jogs along the edges of the nanosheets. These two-dimensional nanostructures first emerge on the cathode's surface and then grow vertically. This anisotropic growth is made possible by ion assistance in regions that exhibit comb-like patterns formed during the chemical etching step, which is a necessary precondition for high reproducibility of the discharge process. Detailed crystallographic characterization of BOC nanosheets was achieved through a range of techniques, including Transmission Electron Microscopy (TEM), Scanning Transmission Electron Microscopy (STEM), High-Resolution TEM Transmission Electron Microscopy (HRTEM), Energy-Dispersive X-ray Spectroscopy (EDX), Selected Area Electron Diffraction (SAED), Convergent Beam Electron Diffraction (CBED), Energy Filtered Transmission Electron Microscopy (EFTEM), and Electron Energy-Loss Spectroscopy (EELS). The investigation reveals that the crystallographic structure of BOC conforms to the space group I4/mmm, with lattice parameters a=3.91 Å and c=13.77 Å, a determination that was confirmed by X-ray Diffraction (XRD). The study also clarifies the potential origin of satellite spots that are consistently observed in SAED patterns along the [001] zone axis. In this research, these spots were primarily attributed to two phenomena: multiple diffraction and local disorder-to-order transformations occurring within the BOC crystal structure. This transformation entails a transition from a body-centered tetragonal structure to a primitive Bravais lattice. To gauge their practical usefulness, we assessed the photocatalytic performance of BOC nanosheets synthesized using the EDDL method and found it to be consistent with BOC obtained through alternative methods. Furthermore, we explored the electronic performance of BOC with the goal of uncovering their potential in nanodevice applications
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