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Visible light-activated degradation of microcystin-LR by ultrathin g-C3N4 nanosheets-based heterojunction photocatalyst
Xu, Yifeng; Hu, Bingkun; Liu, Jining; Tao, Kai; Wang, Ranran; Ren, Yang; Zhao, Xiaofeng; Xu, Jijin; Song, Xuefeng
2019-12-31
Source PublicationJOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN0002-7820
SubtypeArticle; Early Access
AbstractMicrocystins (MCs) is a harmful toxin generated by blue-green algae in water, which has seriously threatened the ecological safety of water and human body. It is urgent to develop new catalysts and techniques for the degradation of MCs. A feasible electrostatic self-assembly method was carried out to synthesize BiVO4/g-C3N4 heterojunction photocatalyst with highly efficient photocatalytic ability, where BiVO4 nanoplates with exposed {010} facets anchored to the g-C3N4 ultrathin nanosheets. The morphology and microstructure of the heterojunction photocatalysts were identified by XRD, SEM, TEM, XPS, and BET. The g-C3N4 nanosheets have huge surface area over 200 m(2)/g and abundant mesoporous ranging from 2-20 nm, which provides tremendous contact area for BiVO4 nanoplates. Meanwhile, the introduction of BiVO4 led to red-shift of the absorption spectrum of photocatalyst, which was characterized by UV-vis diffuse reflection spectroscopy (DRS). Compared with pure BiVO4 and g-C3N4, the BiVO4/g-C3N4 heterojunction shows a drastically enhanced photocatalytic activity in degradation of microcystin-LR (MC-LR) in water. The MC-LR could be removed within 15 minutes under the optimal ratio of BiVO4/g-C3N4. The outstanding performance of the photocatalyst is attributed to synergetic effect of interface Z-scheme heterojunction and high active facets {010} of BiVO4 nanoplates, which provides an efficient transfer pathway to separate photoinduced carriers meanwhile endows the photocatalysts with strong redox ability.
KeywordBiVO4 g-C3N4 nanosheets heterojunction photocatalytic ability
DOI10.1111/jace.16773
WOS KeywordCOMPOSITE PHOTOCATALYSTS ; H-2-PRODUCTION ACTIVITY ; DOPED TIO2 ; WATER ; NITROGEN ; FACETS ; FILMS ; CYANOTOXINS ; REMOVAL ; SOLVENT
Language英语
WOS Research AreaMaterials Science
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27538
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Xu, Yifeng,Hu, Bingkun,Liu, Jining,et al. Visible light-activated degradation of microcystin-LR by ultrathin g-C3N4 nanosheets-based heterojunction photocatalyst[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2019.
APA Xu, Yifeng.,Hu, Bingkun.,Liu, Jining.,Tao, Kai.,Wang, Ranran.,...&Song, Xuefeng.(2019).Visible light-activated degradation of microcystin-LR by ultrathin g-C3N4 nanosheets-based heterojunction photocatalyst.JOURNAL OF THE AMERICAN CERAMIC SOCIETY.
MLA Xu, Yifeng,et al."Visible light-activated degradation of microcystin-LR by ultrathin g-C3N4 nanosheets-based heterojunction photocatalyst".JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2019).
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