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- Title
ZnO Porous Nanosheets with Partial Surface Modification for Enhanced Charges Separation and High Photocatalytic Activity Under Solar Irradiation.
- Authors
Tong, Yanhua; Lai, Shilian; Wu, Fan; Guo, Yuhua; Chen, Haifeng; Pan, Guoxiang; Sun, Jingwei
- Abstract
ZnO porous nanosheets (PNSs) with partial surface modification were fabricated by means of depositing amorphous BiVO4 on basic zinc carbonate nanosheets followed by calcining at 500 °C. At low levels of anchored amorphous BiVO4, the surface of ZnO PNSs was partially evolved into Bi3.9Zn0.4V1.7O10.5 (BZVO). The measurements for photocurrent and photoluminescence demonstrate that partial-surface BZVO-modified ZnO PNSs (ZB_0.01) could significantly inhibit the recombination of photoinduced carriers. This should be ascribable to the driving from surface potential difference produced by non-junction part and vertical p-n BZVO/ZnO junction part on the surface of ZB_0.01. Furthermore, the photocatalytic efficiency in degradation of reactive brilliant red for ZB_0.01 under weak solar irradiation is about 8 times higher than that under strong visible-light illumination. The discussion regarding reasons for this enhancement demonstrates that each component in photocatalysts having rational valence-band maximum and conduction-band minimum energy levels is essential to obtain high-activity sunlight-driven catalysts.
- Subjects
SOLAR activity; ZINC oxide; IRRADIATION; SURFACE potential; PHOTOLUMINESCENCE measurement
- Publication
Nanoscale Research Letters, 2019, Vol 14, Issue 1, pN.PAG
- ISSN
1931-7573
- Publication type
Article
- DOI
10.1186/s11671-019-2981-3