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Microwave-assisted synthesis of Ag2O/reduced TiO2nano-tube arrays photoelectrode with enhanced visible photocatalytic activity for degradation of organic pollutants
Deng, Xiaoyong1; Ma, Qiuling1; Cui, Yuqi1; Zhang, Huixuan1; Cheng, Xiuwen1,2,4,5; Li, Xiaoli1; Xie, Mingzheng1; Cheng, Qingfeng3; Li, Bo2
2017
Source PublicationSeparation and Purification Technology
ISSN13835866
Volume182Pages:230-237
AbstractIn order to improve the charge separation and photocatalytic (PC) efficiency of TiO2nano-tube arrays (TiO2NTAs) photoelectrode, narrower band gap Ag2O nano-crystallites decorated reduced TiO2NTAs (Ag2O/r-TiO2NTAs) photoelectrode was fabricated through one-step microwave reduction strategy, which could simultaneously induce the generation of Ag2O nano-crystallites onto the surface of TiO2NTAs and Ti3+self-doping energy level below the conduction band of TiO2. Subsequently, the resulting photoelectrodes were systematically studied by scanning electron spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV–visible light diffuse reflectance spectroscopy and photoelectrochemical measurements. In addition, the photocatalytic (PC) performance was evaluated by photodecomposition of methyl blue and generation of OH radicals. As a result, Ag2O/r-TiO2NTAs photoelectrode performed a significantly enhanced light absorbance in the whole visible region, transient photocurrent density of 0.189 mA cm−2, photoinduced charge separation efficiency and 98.9% of PC efficiency for decomposition of methyl blue. Furthermore, the enhanced visible light PC mechanism for decomposition of organic pollutant was proposed, which was mainly attributed to the strong visible light absorbance and high photoinduced charge separation efficiency. Moreover, the as-fabricated Ag2O/r-TiO2NTAs photoelectrode performed well stability after consecutive utilization for five cycles. This study provides a versatile strategy to fabricate high-efficient catalyst which could be utilized in waste water elimination. © 2017 Elsevier B.V.
DOI10.1016/j.seppur.2017.03.060
EI Accession Number20171403537833
EI KeywordsX ray photoelectron spectroscopy
EI Classification Number445.1 Water Treatment Techniques - 714.1 Electron Tubes - 741.1 Light/Optics - 761 Nanotechnology - 802.3 Chemical Operations - 804 Chemical Products Generally
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25645
Collection中国科学院上海硅酸盐研究所
Affiliation1.Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China;
2.Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lake, Chinese Academy of Sciences, Xinning Road 18, Chengxi District, Xining; 810008, China;
3.College of Resources and Environment, Chengdu University of Information Technology, Chengdu; 610225, China;
4.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi Road, Changning District, Shanghai; 2000050, China;
5.Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials (CEM), Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Sciences and Engineering, Nanjing University of Information Science and Technology, Nanjing; 210044, China
Recommended Citation
GB/T 7714
Deng, Xiaoyong,Ma, Qiuling,Cui, Yuqi,et al. Microwave-assisted synthesis of Ag2O/reduced TiO2nano-tube arrays photoelectrode with enhanced visible photocatalytic activity for degradation of organic pollutants[J]. Separation and Purification Technology,2017,182:230-237.
APA Deng, Xiaoyong.,Ma, Qiuling.,Cui, Yuqi.,Zhang, Huixuan.,Cheng, Xiuwen.,...&Li, Bo.(2017).Microwave-assisted synthesis of Ag2O/reduced TiO2nano-tube arrays photoelectrode with enhanced visible photocatalytic activity for degradation of organic pollutants.Separation and Purification Technology,182,230-237.
MLA Deng, Xiaoyong,et al."Microwave-assisted synthesis of Ag2O/reduced TiO2nano-tube arrays photoelectrode with enhanced visible photocatalytic activity for degradation of organic pollutants".Separation and Purification Technology 182(2017):230-237.
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