Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation
Hu, Xuefeng1; Ji, Huanhuan1; Chang, Fei2; Luo, Yongming1
2014-04-01
发表期刊CATALYSIS TODAY
ISSN0920-5861
卷号224页码:34-40
产权排序[Hu, Xuefeng; Ji, Huanhuan; Luo, Yongming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China; [Chang, Fei] Shanghai Univ Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China
摘要In this study, a rapid reduction of Cr(VI) and degradation of 2,4,6-trichlorophenol (2,4,6-TCP) in a simultaneous manner was reported through the catalysis of g-C3N4 under visible light (lambda > 420 nm) irradiation. The effects of initial concentration of reactants, dissolved O-2 and pH value were investigated systematically. It indicated that, under the optimized concentration, the Cr(VI) reduction and 2,4,6-TCP oxidation could be accomplished in couple of hours in the presence of g-C3N4. And also, the O-2 involvement and low pH value were able to significantly improve the removal rate of Cr(VI) and 2,4,6-TCP. In addition, the reaction mechanism was investigated through monitoring the reduced states of Cr(VI) and active oxygen intermediates formed during photoreaction by ESR and XPS, as well as determining the degradation products of 2,4,6-TCP by HPLC-MS. The results supported that the redox reactions of Cr(VI) and 2,4,6-TCP can be performed simultaneously via a synergistic oxidation-reduction mechanism in the presence of g-C3N4 under visible light irradiation. (C) 2013 Elsevier B.V. All rights reserved.; In this study, a rapid reduction of Cr(VI) and degradation of 2,4,6-trichlorophenol (2,4,6-TCP) in a simultaneous manner was reported through the catalysis of g-C3N4 under visible light (lambda > 420 nm) irradiation. The effects of initial concentration of reactants, dissolved O-2 and pH value were investigated systematically. It indicated that, under the optimized concentration, the Cr(VI) reduction and 2,4,6-TCP oxidation could be accomplished in couple of hours in the presence of g-C3N4. And also, the O-2 involvement and low pH value were able to significantly improve the removal rate of Cr(VI) and 2,4,6-TCP. In addition, the reaction mechanism was investigated through monitoring the reduced states of Cr(VI) and active oxygen intermediates formed during photoreaction by ESR and XPS, as well as determining the degradation products of 2,4,6-TCP by HPLC-MS. The results supported that the redox reactions of Cr(VI) and 2,4,6-TCP can be performed simultaneously via a synergistic oxidation-reduction mechanism in the presence of g-C3N4 under visible light irradiation. (C) 2013 Elsevier B.V. All rights reserved.
通讯作者Hu, XF (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China. xfhu@yic.ac.cn ; ymluo@yic.ac.cn
关键词G-c3n4 Photocatalysis Cr(Vi) Reduction 2 Visible Light 4 6-tcp
学科领域Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
项目资助者National Natural Science Foundation of China [41076040, 41230858, 21207089]
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收录类别SCI
关键词[WOS]GRAPHITIC CARBON NITRIDE ; SEMICONDUCTOR PHOTOCATALYSIS ; ENVIRONMENTAL APPLICATIONS ; TIO2 ; PHOTODEGRADATION ; CHROMIUM(VI) ; CATALYSIS ; WATER ; PHOTOREDUCTION ; DEGRADATION
文章类型Article
语种英语
资助项目中国科学院海岸带环境过程与生态修复重点实验室
WOS研究方向Chemistry ; Engineering
WOS记录号WOS:000331724200006
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/6895
专题中科院海岸带环境过程与生态修复重点实验室
作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China
2.Shanghai Univ Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China
第一作者单位中国科学院烟台海岸带研究所
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Hu, Xuefeng,Ji, Huanhuan,Chang, Fei,et al. Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation[J]. CATALYSIS TODAY,2014,224:34-40.
APA Hu, Xuefeng,Ji, Huanhuan,Chang, Fei,&Luo, Yongming.(2014).Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation.CATALYSIS TODAY,224,34-40.
MLA Hu, Xuefeng,et al."Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation".CATALYSIS TODAY 224(2014):34-40.
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