Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (11): 1205-1209.DOI: 10.15541/jim20190010

Special Issue: 光催化材料与技术 环境材料优选论文

• RESEARCH LETTERS • Previous Articles     Next Articles

MoS2 Quantum Dots Decorated NH2-MIL-125 Heterojunction: Preparation and Visible Light Photocatalytic Performance

HAN Li,ZHANG Xiao-Min,WU De-Yong()   

  1. Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi 445000, China
  • Received:2019-01-04 Published:2019-11-20 Online:2019-05-13
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  • Supported by:
    National Natural Science Foundation of China(21767009);China Scholarship Council(201808420149);Hubei Key Laboratory of Biological Resources Protection and Utilization(PKLHB1908);Lindergraduate Innoration Progran(201910517006)

Abstract:

MoS2 quantum dots (QDs) decorated NH2-MIL-125 (MoS2 QDs/NH2-MIL-125) heterostructures were successfully fabricated by a facile method. XRD results exhibit that NH2-MIL-125 and MoS2 form crystals in the synthesis process of MoS2 QDs/NH2-MIL-125 heterojunctions. TEM results demonstrated clearly that the MoS2 Quantum dots with size of about 4 nm successfully disperse on the surface of NH2-MIL-125 plate. Compared with bulk MoS2 and NH2-MIL-125, the MoS2 QDs/NH2-MIL-125 heterostructures exhibit enhanced photocatalytic performance in degradation of methyl orange under visible light irradiation, about 5.8 and 7.4 times higher that of pure bulk MoS2 and NH2-MIL-125, respectively. Meanwhile, MoS2 QDs/NH2-MIL-125 composites exhibit good stability and reusability during cycle experiment. The excellent photocatalytic activity of MoS2 QDs/NH2-MIL-125 heterostructures is attributed to the formation of heterojunctions between MoS2 QDs and NH2-MIL-125, Tacilitating separation of the photogenerated charge carries. PL results prove that MoS2 QDs/NH2-MIL-125 composites own lower recombination of photogenerated electrons and holes, resulting in superior photocatalytic ability.

Key words: MoS2 quantum dots(QDs), metal-organic frameworks, heterojunction, photocatalysis

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