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- Title
MoS<sub>2</sub> quantum dots-modified porous β-Bi<sub>2</sub>O<sub>3</sub> microspheres with enhanced visible-light-induced photocatalytic activity for Bisphenol A degradation and NO removal.
- Authors
Hojamberdiev, Mirabbos; Zhu, Gangqiang; Lu, Huan; Kumar, Mahesh; Wang, Miaomiao; Gao, Jianzhi
- Abstract
In this study, a three dimensional (3D) MoS2/β-Bi2O3 heterostructure with high-performance for photocatalytic removal of pollutants was constructed by a simple deposition of the MoS2 quantum dots on the surface of porous β-Bi2O3 spheres. Compared with pure β-Bi2O3 microspheres, the 1.0% MoS2/β-Bi2O3 composite exhibited excellent photocatalytic activity in the degradation of Bisphenol A (BPA) in aqueous solution and oxidative removal of gaseous NO under visible light irradiation, and the removal efficiency reached 94.0% and 41.4% for BPA and NO within 30 min, respectively. The enhanced photocatalytic activity is attributed to the formation heterojunction between MoS2 quantum dots and β-Bi2O3, which facilitates the separation and transfer efficiency of photogenerated electron-hole pairs, boosts catalytic active sites and hinders an electron-hole recombination rate. The results of trapping experiments indicates that both of O2−∙ and h+ are the reactive species for BPA degradation. The recyclability test confirms that the 1.0% MoS2/β-Bi2O3 composite photocatalyst has a superior stability during recycling cycle. This work demonstrates that a unique 3D photocatalyst system can provides a new perspective and opens up new opportunities on the design of efficient composite photocatalysts.
- Subjects
VISIBLE spectra; BISPHENOL A; NANOCOMPOSITE materials; SCANNING electron microscopy; MOLYBDENUM disulfide
- Publication
Journal of Materials Science: Materials in Electronics, 2019, Vol 30, Issue 3, p2610
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-0536-5