1. Synergetic effect of MoS2 and graphene as cocatalysts for enhanced photocatalytic activity of BiPO4 nanoparticles.
- Author
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Lv, Hua, Liu, Yumin, Tang, Haibo, Zhang, Peng, and Wang, Jianji
- Subjects
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PHOTOCATALYSTS , *PHOTODEGRADATION , *BISMUTH phosphate , *NANOPARTICLES , *MOLYBDENUM disulfide , *GRAPHENE , *SYNERGETICS - Abstract
The photodegradation of organic pollutants is an attractive green chemistry technology for water pollution control. Here we prepared a new composite material consisting of BiPO 4 nanocrystals grown on layered graphene and MoS 2 as a high-performance photocatalyst for the photodegradation of organic pollutants. This composite material was synthesized by a facile one-pot microwave-assisted hydrothermal technique in the presence of layered graphene and MoS 2 . Through optimizing the loading content of each component, the BiPO 4 -MoS 2 /graphene nanocomposite exhibited the highest photocatalytic activity for the degradation of Rhodamine (RhB) when the content of MoS 2 and graphene was 2 wt% and 7 wt%, respectively. The enhanced photocatalytic activity of the new composite photocatalyst was attributed to the positive synergetic effect of the layered graphene and MoS 2 as cocatalyst, which acted as electron collector and transporter for the interfacial electron transfer from BiPO 4 to electron acceptor in the aqueous solution and thus suppressed the charge recombination and made the photogenerated holes more available to participated in the oxidation process. Moreover, the presence of layered MoS 2 /graphene hybrid could offer more reactive sites and activated the O 2 molecular in water to form superoxide radical, thereby resulting in the enhanced photocatalytic activity. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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