CaMoO4/CaWO4 heterojunction micro/nanocomposites with interface defects for enhanced photocatalytic activity

doi:10.1016/j.colsurfa.2022.128642

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	CaMoO4/CaWO4 heterojunction micro/nanocomposites with interface defects for enhanced photocatalytic activity
	Gao, Huajing 2,3,4; Wang, Shifa 3,4; Wang, Yue 3; Yang, Hua 2,5; Wang, Fei 6; Tang, Shengnan 3; Yi, Zao 7; Li, Dengfeng 1
刊名	Colloids and Surfaces A: Physicochemical and Engineering Aspects
	2022-06-05
卷号	642
关键词	Aromatic compounds Calcination Calcium compounds Catalysts Heterojunctions Photocatalytic activity Calcination technologies Cycle index High photocatalytic activities Initial dye concentration Interface defects Low temperature calcination technology Lows-temperatures Methylene blue dye Photocatalytic activities Polyacrylamide gel method
ISSN号	0927-7757
DOI	10.1016/j.colsurfa.2022.128642
英文摘要	The polyacrylamide gel method combined with low temperature calcination technology (PGMCLCT) have been applied to prepare the CaMoO4/CaWO4 heterojunction micro/nanocomposites with novel light emission and high photocatalytic activity for the degradation of methylene blue (MB) dye. A variety of characterization methods confirmed the formation of heterojunctions between CaMoO4 and CaWO4 in a special interface contact way. The CaMoO4/CaWO4 heterojunction micro/nanocomposites exhibits a novel emission peak at 400 nm with the excitation wavelength of 240 nm and high photocatalytic activity for the degradation of MB dye. With the increase of the mass percentage of CaWO4, the fluorescence emission intensity of CaMoO4/CaWO4 heterojunction micro/nano composites decreases, while the photocatalytic activity increases gradually. The effects of catalyst content, initial dye concentration and cycle index on the photocatalytic activity of CaMoO4/CaWO4 heterojunction micro/nanocomposites were systematically studied. The optimal catalyst content, initial dye concentration, irradiation time and cycle index are 1 g/L, 20 mg/L, 180 min and 5, respectively. The CaMoO4/ wt 20% CaWO4 heterojunction micro/nanocomposites exhibits highest degradation percentage of about 91.44% due to the carbon skeleton or adsorbed oxygen accelerates the separation of photogenerated electrons and hole pairs. This method provides a technical reference for the synthesis of other types of heterojunction micro/nanocomposites. © 2022 Elsevier B.V.
WOS研究方向	Chemistry
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000765935800005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157850]
专题	理学院
作者单位	1.School of Science, Chongqing University of Posts and Telecommunications, Nan'an District, Chongqing; 400065, China 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Electronic and Information Engineering, Chongqing Three Gorges University, Wanzhou, Chongqing; 404000, China; 4.Chongqing Key Laboratory of Geological Environment Monitoring and Disaster Early-warning in Three Gorges Reservoir Area, Chongqing Three Gorges University, Wanzhou, Chongqing; 404000, China; 5.School of Science, Lanzhou University of Technology, Lanzhou; 730050, China; 6.College of Materials Science and Engineering, Sichuan University, Chengdu; 610064, China; 7.Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang; 621010, China;
推荐引用方式 GB/T 7714	Gao, Huajing,Wang, Shifa,Wang, Yue,et al. CaMoO4/CaWO4 heterojunction micro/nanocomposites with interface defects for enhanced photocatalytic activity[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2022,642.
APA	Gao, Huajing.,Wang, Shifa.,Wang, Yue.,Yang, Hua.,Wang, Fei.,...&Li, Dengfeng.(2022).CaMoO4/CaWO4 heterojunction micro/nanocomposites with interface defects for enhanced photocatalytic activity.Colloids and Surfaces A: Physicochemical and Engineering Aspects,642.
MLA	Gao, Huajing,et al."CaMoO4/CaWO4 heterojunction micro/nanocomposites with interface defects for enhanced photocatalytic activity".Colloids and Surfaces A: Physicochemical and Engineering Aspects 642(2022).