Photocatalytic, Fenton and photo-Fenton degradation of RhB over Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts

doi:10.1016/j.mssp.2018.03.033

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	Photocatalytic, Fenton and photo-Fenton degradation of RhB over Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts
	Ye, Yongchun 1,2; Yang, Hua 1,2; Wang, Xiangxian 2; Feng, Wangjun 2
刊名	MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
	2018-08
卷号	82 页码:14-24
关键词	LaFeO3 nanoparticles g-C3N4 nanosheets g-C3N4/LaFeO3 heterojunction Catalytic activity Photo-Fenton mechanism
ISSN号	1369-8001
DOI	10.1016/j.mssp.2018.03.033
英文摘要	Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts were prepared by calcining the uniformly mixed g-C3N4 nanosheets and LaFeO3 nanoparticles at 300 degrees C for 1 h. The as-prepared g-C3N4/LaFeO3 composites were systematically characterized by XRD, SEM, TEM, XPS, UV-vis DRS, PL spectroscopy, EIS and photocurrent response. It is demonstrated that LaFeO3 nanoparticles (average size: ca. 35 nm) are uniformly assembled onto the surface of g-C3N4 nanosheets through chemical bonding, leading to the formation of g-C3N4/LaFeO3 heterojunctions. The photocatalytic, Fenton and photo-Fenton performances of the samples were investigated by degrading RhB using simulated sunlight as the light source. Compared to bare LaFeO3 and g-C3N4, the g-C3N4/LaFeO3 composites exhibit significantly enhanced photocatalytic and photo-Fenton degradation of the dye, and the maximum activity is observed for the 15% g-C3N4/LaFeO3 composite. Moreover, the photo-Fenton performance of the composites is much higher than the photocatalytic or Fenton performances. The much improved photo-fenton activity is ascribed to the efficient separation of photogenerated electron-hole pairs due to the Z-scheme electron transfer and the synergistic effect between LaFeO3 and g-C3N4. center dot OH radicals were examined by PL spectroscopy using TPA as a probe molecule, clearly revealing the center dot OH generation, and moreover, the center dot OH yield and the dye degradation rate show a similar variation between different cases of the catalysis process. This suggested that center dot OH is the dominant reactive species causing the dye degradation. The underlying photo-Fenton mechanism of the composites is discussed.
资助项目	National Natural Science Foundation of China[51662027]
WOS研究方向	Engineering ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000429746600003
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32521]
专题	理学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Yang, Hua
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Ye, Yongchun,Yang, Hua,Wang, Xiangxian,et al. Photocatalytic, Fenton and photo-Fenton degradation of RhB over Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts[J]. MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING,2018,82:14-24.
APA	Ye, Yongchun,Yang, Hua,Wang, Xiangxian,&Feng, Wangjun.(2018).Photocatalytic, Fenton and photo-Fenton degradation of RhB over Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts.MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING,82,14-24.
MLA	Ye, Yongchun,et al."Photocatalytic, Fenton and photo-Fenton degradation of RhB over Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts".MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING 82(2018):14-24.