期刊
APPLIED SURFACE SCIENCE
卷 385, 期 -, 页码 34-41出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.05.065
关键词
g-C3N4/Bi2O3/BiPO4; Z-scheme; p-n Heterojunction; Photoelectrochemical properties
类别
资金
- National Natural Science Foundation of China [51202136]
- Special Fund from Shaanxi Provincial Department of Education [2013JK0939]
- Natural Science Foundation of Shaanxi [2015JM5213]
- Academic Backbone Cultivation Program of Shaanxi University of science technology [XSGP201202]
- Postgraduate Innovation Fund of Shaanxi University of Science and Technology
In g-C3N4/Bi2O3/BiPO4, the p-n junction between p-type Bi2O3 and n-type BiPO4 was encapsulated by g-C3N4 and a direct Z-scheme was built between g-C3N4 and Bi2O3. The optical, morphological and photoelectrochemical (PEC) properties of BiPO4, g-C3N4/BiPO4, Bi2O3/BiPO4 and g-C3N4/Bi2O3/BiPO4 hierarchical Z-scheme system were studied. More than 90% photodegradation of methyl orange (MO) with the exposure of simulated solar light was achieved within 160 min with the g-C3N4/Bi2O3/BiPO4, which displayed remarkably promoted photocatalytic activities than other samples. The electrochemical impedance spectra and photocurrent results also proved that efficient charge separation and better electron transport properties were achieved by g-C3N4/Bi2O3/BiPO4. In general, the addition of g-C3N4 can guide the residual electrons on p-type Bi2O3 to recombine with photoholes of g-C3N4 and make sure the left carries exhibit stronger oxidation and reduction ability to boost the production of active groups. (C) 2016 Elsevier B.V. All rights reserved.
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