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Fabrication of Ag-Ag2O/reduced TiO2nanophotocatalyst and its enhanced visible light driven photocatalytic performance for degradation of diclofenac solution
Cui, Yuqi1; Ma, Qiuling1; Deng, Xiaoyong1; Meng, Qi1; Cheng, Xiuwen1,3,4,5; Xie, Mingzheng1,3; Li, Xiaoli1; Cheng, Qingfeng2,3; Liu, Huiling3
2017
Source PublicationApplied Catalysis B: Environmental
ISSN09263373
Volume206Pages:136-145
AbstractIn this study, Ag-Ag2O/reduced TiO2(denoted as Ag-Ag2O/r-TiO2) nano-photocatalyst had been fabricated through one-step solution reduction strategy in the presence of potassium borohydride. Afterwards, physicochemical properties of the resulting samples were investigated by scanning electron microscope (SEM), N2adsorption/desorption isotherms, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (UV-vis DRS), electron spin resonance (ESR) and time-resolved surface photovoltage (TR-SPV) techniques. Results indicated that potassium borohydride treatment could simutaneously induce the generation of Ti3+self-doping energy level between the forbidden band of TiO2and metallic Ag species existed in the forms of Ag0and Ag2O nanocrystalline, thereby resulting in the greatly enhanced visible light absorbance and photoinduced charge separation efficiency. In addition, the visible light driven (VLD) photocatalytic (PC) performance was evaluated through the degradation of diclofenac and generation of ·OH radicals. As-expected, Ag-Ag2O/r-TiO2sample exhibited higher VLD PC performance and larger generation amount of ·OH radicals. Furthermore, the enhanced VLD PC mechanism was proposed and confirmed, which was mainly attributed to the synergistic effect originated from the localized SPR of Ag0nanocrystalline and Ti3+self-doping which responsible for the intense visible light absorbance, high photoinduced charge separation efficiency and VLD PC performance. © 2017 Elsevier B.V.
DOI10.1016/j.apcatb.2017.01.014
EI Accession Number20170403269030
EI KeywordsElectron spin resonance spectroscopy
EI Classification Number701.2 Magnetism: Basic Concepts and Phenomena - 741.1 Light/Optics - 761 Nanotechnology - 801 Chemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds
Citation statistics
Cited Times:37[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25570
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, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; Gansu Province; 730000, China;
2.College of Resources and Environment, Chengdu University of Information Technology, Chengdu; 610225, China;
3.State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Municipal of Environmental Engineering, Harbin Institute of Technology, Huanghe Road 73, Nangang District, Harbin; 150090, 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
Cui, Yuqi,Ma, Qiuling,Deng, Xiaoyong,et al. Fabrication of Ag-Ag2O/reduced TiO2nanophotocatalyst and its enhanced visible light driven photocatalytic performance for degradation of diclofenac solution[J]. Applied Catalysis B: Environmental,2017,206:136-145.
APA Cui, Yuqi.,Ma, Qiuling.,Deng, Xiaoyong.,Meng, Qi.,Cheng, Xiuwen.,...&Liu, Huiling.(2017).Fabrication of Ag-Ag2O/reduced TiO2nanophotocatalyst and its enhanced visible light driven photocatalytic performance for degradation of diclofenac solution.Applied Catalysis B: Environmental,206,136-145.
MLA Cui, Yuqi,et al."Fabrication of Ag-Ag2O/reduced TiO2nanophotocatalyst and its enhanced visible light driven photocatalytic performance for degradation of diclofenac solution".Applied Catalysis B: Environmental 206(2017):136-145.
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