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Exploring the effects of nanocrystal facet orientations in g-C3N4/BiOCl heterostructures on photocatalytic performance
Li, Qingbo1; Zhao, Xian2; Yang, Jun3; Jia, Chun-Jiang1; Jin, Zhao1; Fan, Weiliu1
2015
Source PublicationNANOSCALE
ISSN2040-3364
Volume7Issue:45Pages:18971-18983
Abstract

Effective separation and migration of photogenerated electron-hole pairs are two key factors to determine the performance of photocatalysts. It has been widely accepted that photocatalysts with heterojunctions usually exhibit excellent charge separation. However, the migration process of separated charges in the heterojunction structures has not been fully investigated. Herein, photocatalysts with heterojunctions are constructed by loading g-C3N4 nanoparticles onto BiOCl nanosheets with different exposed facets (BOC-001 and BOC-010). The g-C3N4 nanoparticles with decreasing size and increasing zeta potential could induce stronger coupling and scattering in the heterojunction. The relationship between the crystal facet orientation in the BiOCl nanosheets and charge separation/effective migration behaviours of the materials is investigated. The visible light photocatalytic activity of the composites is evaluated by methyl orange (MO) and phenol degradation experiments, and the results show that ngCN/BOC-010 composites exhibit higher photocatalytic performance than that of ng-CN/BOC-001 composites. Both photoelectrochemical and fluorescence emission measurements indicate that the different exposed facets in ng-CN/BiOCl composites could induce the migration of the photogenerated electrons in different ways, but do not significantly alter the separation efficiencies. The separated electrons in ngCN/BOC-010 undergo a shorter transport distance than that of ng-CN/BOC-001 to reach the surface reactive sites. The study may suggest that the crystal facet orientation in polar semiconductors is a critical factor for designing highly efficient heterojunction photocatalysts.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c5nr05154a
Indexed BySCI
Language英语
WOS KeywordGRAPHITIC CARBON NITRIDE ; VISIBLE-LIGHT IRRADIATION ; METHYL-ORANGE ; HETEROJUNCTION PHOTOCATALYSTS ; EFFICIENT DEGRADATION ; ELECTRONIC-STRUCTURE ; HYDROGEN-PRODUCTION ; FACILE SYNTHESIS ; NANOTUBE ARRAYS ; RHODAMINE-B
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational Natural Science Foundation of China(21173131) ; Taishan Scholar Project of Shandong Province
WOS IDWOS:000364852500019
Citation statistics
Cited Times:77[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19869
Collection多相复杂系统国家重点实验室
Affiliation1.Shandong Univ, Sch Chem & Chem Engn, State Educ Minist, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China
2.Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Qingbo,Zhao, Xian,Yang, Jun,et al. Exploring the effects of nanocrystal facet orientations in g-C3N4/BiOCl heterostructures on photocatalytic performance[J]. NANOSCALE,2015,7(45):18971-18983.
APA Li, Qingbo,Zhao, Xian,Yang, Jun,Jia, Chun-Jiang,Jin, Zhao,&Fan, Weiliu.(2015).Exploring the effects of nanocrystal facet orientations in g-C3N4/BiOCl heterostructures on photocatalytic performance.NANOSCALE,7(45),18971-18983.
MLA Li, Qingbo,et al."Exploring the effects of nanocrystal facet orientations in g-C3N4/BiOCl heterostructures on photocatalytic performance".NANOSCALE 7.45(2015):18971-18983.
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