期刊
APPLIED SURFACE SCIENCE
卷 484, 期 -, 页码 341-353出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.04.092
关键词
rGO QDs-Bi-Bi2WO6 nanocomposite; Bi-Bi2WO6/EP & rGO QDs-Bi-Bi2WO6/EP; floating photocatalysts; Environmental remediation; Effective charge separation
类别
资金
- Natural Science Foundation of China (NSFC) [21575011]
- Fundamental Research Funds for the Central Universities [12060093063]
In this research work, we deposited rGO QDs on the surface of flower-shaped hierarchical Bi-Bi2WO6/EP (Expanded Perlite) floating photocatalyst via the facile-liquid-phase deposition route. The rGO QDs-Bi-Bi2WO6/EP is the EP-based floating nanocomposite which is consisting of 3C heterojunction (rGO QDs, Bi2WO6 and Bi nanoparticles). In as-fabricated rGO QDs-Bi-Bi2WO6/EP photocatalyst, rGO QDs-Bi-Bi2WO6 was successfully immobilized as superior-active photocatalyst component and the selection of EP was retainable price sustainable support and recyclability of the designed photocatalyst. The as-fabricated nanocomposites were comprehensively characterized by spectroscopic techniques and electrochemical reaction. The photocatalytic degradation performances of rGO QDs-Bi-Bi2WO6/EP nanocomposite was evaluated evidently by the degradation of hazardous organic contaminants (RhB and phenol) with high rate constants k of 0.23 min(-1) and 0.047 min(-1), respectively, under sun-like irradiation. The obviously enhanced photocatalytic efficacy of rGO QDs-Bi-Bi2WO6/EP should be attributed to uniform dispersion and floating behavior of the well-designed photocatalyst owing to enhanced visible-light absorption, photocurrent and high transfer efficiency of photoinduced electron-hole pairs due to close intimated contact between rGO QDs and Bi-Bi2WO6/EP.
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