Journal Article10.1021/AM300835P
Oxygen vacancy induced band-gap narrowing and enhanced visible light photocatalytic activity of ZnO.
Junpeng Wang,Zeyan Wang,Baibiao Huang,Yandong Ma,Yuanyuan Liu,Xiaoyan Qin,Xiaoyang Zhang,Ying Dai +7 more
1.4K
TL;DR: The ZnO with oxygen vacancies are found to be efficient for photodecomposition of 2,4-dichlorophenol under visible light irradiation and a narrowing bandgap can be confirmed by the enhancement of the photocurrent response when theZnO was irradiated with visible light.
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Abstract: Oxygen vacancies in crystal have important impacts on the electronic properties of ZnO. With ZnO2 as precursors, we introduce a high concentration of oxygen vacancies into ZnO successfully. The obtained ZnO exhibits a yellow color, and the absorption edge shifts to longer wavelength. Raman and XPS spectra reveal that the concentration of oxygen vacancies in the ZnO decreased when the samples are annealed at higher temperature in air. It is consistent with the theory calculation. The increasing of oxygen vacancies results in a narrowing bandgap and increases the visible light absorption of the ZnO. The narrowing bandgap can be confirmed by the enhancement of the photocurrent response when the ZnO was irradiated with visible light. The ZnO with oxygen vacancies are found to be efficient for photodecomposition of 2,4-dichlorophenol under visible light irradiation.
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Citations
CeO2 Nanostructures Enriched with Oxygen Vacancies for Photocatalytic CO2 Reduction
Abdo Hezam,Keerthiraj Namratha,Qasem Ahmed Drmosh,Deepalekshmi Ponnamma,Jingwei Wang,Suchitra Prasad,Momin Ahamed,Chun Cheng,Kullaiah Byrappa +8 more
- 24 Jan 2020
TL;DR: In this paper, the authors proposed a method for synthesizing nanomaterials at the expense of solar energy and associated energy generation, which has the utmost significance as far as environmental sustainability is concerned.
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Metal oxide semiconductors with highly concentrated oxygen vacancies for gas sensing materials: a review
TL;DR: In this article, the role of oxygen vacancies on band structure, electrical conductivity, optical absorption and gas adsorption is presented, and the application of metal oxide semiconductors with highly concentrated oxygen vacancies in the field of gas sensors is reviewed.
189
Stable Ti3+ Self-Doped Anatase-Rutile Mixed TiO2 with Enhanced Visible Light Utilization and Durability
TL;DR: In this paper, a photocatalytic mechanism of self-doped blue TiO2 nanoparticles with mixed phases of anatase and rutile has been proposed, which could be attributed to the presence of Ti3+ centers and the synergetic effect between the two phases.
188
Visible-light photocatalysis on C-doped ZnO derived from polymer-assisted pyrolysis
Ahmad S. Alshammari,Lina Chi,Lina Chi,Xiaoping Chen,Xiaoping Chen,Abdulaziz A. Bagabas,Denis Kramer,Abdulaziz I. Al-Romaeh,Zheng Jiang +8 more
TL;DR: In this paper, C-doped ZnO with a large surface area was prepared via F127-assisted pyrolysis at 500 °C and used for visible-light-responsive photocatalytic water purification.
Oxygen Vacancy-Induced Structural, Optical, and Enhanced Supercapacitive Performance of Zinc Oxide Anchored Graphitic Carbon Nanofiber Hybrid Electrodes
Gowra Raghupathy Dillip,Arghya Narayan Banerjee,Veettikkunnu Chandran Anitha,Borelli Deva Prasad Raju,Sang Woo Joo,Bong-Ki Min +5 more
TL;DR: An effective strategy to intrinsically improve the conductivity and supercapacitive performance of the hybrids by inducing oxygen vacancies is demonstrated and is expected to provide new insights into improving the electrochemical properties of various composites/hybrids.
185
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