Engineering of ZnO nanostructures for efficient solar photocatalysis

Das, Abinash; Malakar, Pritam; Nair, Ranjith G.

doi:10.1016/j.matlet.2018.02.057

Cited by 38 publications

(9 citation statements)

References 18 publications

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“…Despite the fact that ZnO has been recognized as a promising photocatalyst, it has a high band gap value (~3.3 eV)-only 4% of the solar spectrum is effective to activate it. Therefore, improving the photoresponse of ZnO to longer wavelengths of the electromagnetic spectrum is the goal to be achieved for photocatalytic applications under solar irradiation [7]. Different strategies have been reported to extend photoresponse of semiconductors into the visible light region: (a) sensitization with natural and synthetic dyes [8][9][10][11], (b) coupled semiconductors [12][13][14], (c) surface plasmon resonance [15][16][17][18], and (d) doping ZnO structure with metals and nonmetals [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Methylene Blue Photodegradation under Visible Irradiation on Ag-Doped ZnO Thin Films

Vallejo

Cantillo

Díaz‐Uribe

2020

International Journal of Photoenergy

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This study synthesized and characterized Ag-doped ZnO thin films. Doped ZnO powders were synthesized using the sol-gel method, and thin films were fabricated using the doctor blade technique. The Ag content was determined by optical emission spectrometers with inductively coupled plasma (ICP plasma). Additionally, X-ray diffraction, Raman spectroscopy, Atomic Force Microscopy (AFM), diffuse reflectance, and X-ray photoelectron spectroscopy (XPS) measurements were used for physicochemical characterization. Finally, the photocatalytic degradation of methylene blue (MB) was studied under visible irradiation in aqueous solution. The Langmuir-Hinshelwood model was used to determine the reaction rate constant of the photocatalytic degradation. The physicochemical characterization showed that the samples were polycrystalline, and the diffraction signals corresponded to the ZnO wurtzite crystalline phase. Raman spectroscopy verified the ZnO doping process. The AFM analysis showed that roughness and grain size were reduced after the doping process. Furthermore, the optical results indicated that the presence of Ag improved the ZnO optical properties in the visible range, and the Ag-doped ZnO thin films had the lowest band gap value (2.95 eV). Finally, the photocatalytic degradation results indicated that the doping process enhanced the photocatalytic activity under visible irradiation, and the Ag-doped ZnO thin films had the highest MB photodegradation value (45.1%), as compared to that of the ZnO thin films (2.7%).

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Section: Introductionmentioning

confidence: 99%

Methylene Blue Photodegradation under Visible Irradiation on Ag-Doped ZnO Thin Films

Vallejo

Cantillo

Díaz‐Uribe

2020

International Journal of Photoenergy

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“…[1][2][3][4] Additionally, the study of semiconductors in photolysis has received significant research attention. 5 Since utilising an effective photocatalyst is essential, numerous commercially available photocatalysts, such as ZnO, 6 TiO 2 , 7 V 2 O 5 , 8 and ZnS, 9 have been extensively researched. Owing to its safety, low price, high efficiency, and exceptional electrical conductivity, ZnO is one of the most promising materials.…”

Section: Introductionmentioning

confidence: 99%

Synergistic surface modulation of Ag/ZnO@ZIF-8 hybrid microspheres for enhanced photocatalytic degradation efficiency of rhodamine B

2023

CrystEngComm

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“…The research and development of new effective photocatalytic materials are the subject of numerous and intensive studies being carried out all over the world. It is known that materials based on zinc oxide are one of the most efficient photocatalysts [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Structural Engineering of Photocatalytic ZnO-SnO2-Fe2O3 Composites

et al. 2022

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The ZnO-SnO2-Fe2O3 composites containing flower-like particles were prepared by the non-isothermal polymer-salt method. Thermochemical processes proceeding during composites synthesis was studied by DTA/TG method. The structure and morphology of obtained composites were studied by the SEM and XRD analysis. Prepared composites containing small amounts of SnO2 and Fe2O3 demonstrate the high adsorption and photodecomposition of the organic dye Rhodamine 6G in its solutions. Obtained materials show the ability of the photogeneration of the chemically active singlet oxygen under the visible irradiation. The synergistic effect of the flower structure and Fe2O3 doping can significantly improve the photocatalytic and adsorption activities.

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Engineering of ZnO nanostructures for efficient solar photocatalysis

Cited by 38 publications

References 18 publications

Methylene Blue Photodegradation under Visible Irradiation on Ag-Doped ZnO Thin Films

Methylene Blue Photodegradation under Visible Irradiation on Ag-Doped ZnO Thin Films

Synergistic surface modulation of Ag/ZnO@ZIF-8 hybrid microspheres for enhanced photocatalytic degradation efficiency of rhodamine B

Structural Engineering of Photocatalytic ZnO-SnO2-Fe2O3 Composites

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