XJIPC OpenIR  > 环境科学与技术研究室
Photocatalytic activity and mechanism of bisphenol a removal over TiO2-x/rGO nanocomposite driven by visible light
Xu, L (Xu, Lu)[ 1 ]; Yang, L (Yang, Lei)[ 1 ]; Johansson, EMJ (Johansson, Erik M. J.)[ 2 ]; Wang, YH (Wang, Yuanhao)[ 3 ]; Jin, PK (Jin, Pengkang)[ 1 ]
2018
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume350Issue:10Pages:1043-1055
Abstract

In the present study, Ti3+ and oxygen vacancies (Ti3+/O-v) self-doped TiO2 and coupled with a reduced graphene oxide (rGO) nanocomposite (TiO2-x/rGO) was successfully synthesized via a facile hydrothermal-calcination method for the efficient degradation of bisphenol A (BPA) under visible light. The results of XPS, ERP and TEM analyses revealed that the presence of Ti3+/O-v in the lattice of TiO2-x/rGO leads to the narrowed band gap and enhanced visible light harvesting. The chemical bonds (TieOeC) between TiO2-x and rGO act as the channel for electron transfer, consequently resulting in the efficient charge separation, which was investigated and confirmed by such methods as PL spectra and time-resolved PL spectra. In addition, the coupling of TiO2-x and rGO could strongly suppress the aggregation of TiO2-x particles and therefore improve the adsorption of organic pollutants. For the synergistic effect of the three preeminent features mentioned above, TiO2-x/rGO exhibited a 6.16-, 2.92-and 2.55-fold faster reaction rate for BPA degradation than that of pristine TiO2, TiO2/rGO and TiO2-x, respectively. Moreover, the effects of the initial substrate concentration, initial solution pH, catalyst dosage and inorganic anions on BPA removal were also investigated in depth. EPR measurements indicated that center dot O-2(-) as the major oxidizing species, is responsible for the degradation of BPA. Next, the feasible pathway of BPA degradation by TiO2-x/rGO was proposed based on the analysis of intermediate products. Finally, the mechanism of the enhanced photocatalytic performance by TiO2-x/rGO under visible light was discussed. Based on these results, the TiO2-x/rGO nanocomposite could be an efficient and promising photocatalyst for the degradation of organic pollutants in water.

KeywordEndocrine Disrupting Chemicals Bisphenol a
Indexed BySCI
WOS IDWOS:000437093000104
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5520
Collection环境科学与技术研究室
Affiliation1.Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Minist Educ, Key Lab Northwest Water Resources Environm & Ecol, Xian 710055, Shaanxi, Peoples R China
2.Uppsala Univ, Phys Chem, Dept Chem Angstrom, S-75120 Uppsala, Sweden
3.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Xu, L ,Yang, L ,Johansson, EMJ ,et al. Photocatalytic activity and mechanism of bisphenol a removal over TiO2-x/rGO nanocomposite driven by visible light[J]. CHEMICAL ENGINEERING JOURNAL,2018,350(10):1043-1055.
APA Xu, L ,Yang, L ,Johansson, EMJ ,Wang, YH ,&Jin, PK .(2018).Photocatalytic activity and mechanism of bisphenol a removal over TiO2-x/rGO nanocomposite driven by visible light.CHEMICAL ENGINEERING JOURNAL,350(10),1043-1055.
MLA Xu, L ,et al."Photocatalytic activity and mechanism of bisphenol a removal over TiO2-x/rGO nanocomposite driven by visible light".CHEMICAL ENGINEERING JOURNAL 350.10(2018):1043-1055.
Files in This Item:
File Name/Size DocType Version Access License
Photocatalytic activ(3356KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xu, L (Xu, Lu)[ 1 ]]'s Articles
[Yang, L (Yang, Lei)[ 1 ]]'s Articles
[Johansson, EMJ (Johansson, Erik M. J.)[ 2 ]]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu, L (Xu, Lu)[ 1 ]]'s Articles
[Yang, L (Yang, Lei)[ 1 ]]'s Articles
[Johansson, EMJ (Johansson, Erik M. J.)[ 2 ]]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu, L (Xu, Lu)[ 1 ]]'s Articles
[Yang, L (Yang, Lei)[ 1 ]]'s Articles
[Johansson, EMJ (Johansson, Erik M. J.)[ 2 ]]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Photocatalytic activity and mechanism of bisphenol a removal over TiO2−xrGO nanocomposite driven by visible light.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.