Cu-MOF assisted synthesis of CuS/CdS(H)/CdS(C): Enhanced photocatalytic hydrogen production under visible light

Liangfeng Luo, Yidi Wang, Siping Huo, Peng Lv, Jun Fang, Yang Yang, Bin Fei

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

CuS/CdS(H)/CdS(C) photocatalysts were synthesized via the hydrothermal method by employing thiourea, Cd(CH3COO)2·3H2O and copper 1,4-benzenedicarboxylate MOF (CuBDC). The photocatalysts were characterized by XRD, XPS, BET, TEM and UV–vis diffuse reflectance spectra. Interestingly, hexagonal CdS (CdS(H)) and cubic CdS (CdS(C)) were formed with phase junctions in one step when CuBDC was introduced in the synthesis process, in addition, CuS nanoparticles were deposited on CdS. However, only hexagonal CdS was obtained without CuBDC. It demonstrated that CuBDC was not only the precursor of CuS but also the structural modifier for CdS. With the reduction of re-combination of photo-induced electrons and holes caused by phase junctions and the enhancement of visible-light absorptions due to the loading of CuS, all CuS/CdS(H)/CdS(C) photocatalysts had higher photocurrent densities under visible-light irradiation, and consequently the higher rates of H2 production than pure CdS(H). Typically, the catalyst with 2.89 wt% of Cu showed a highest rate of H2 evolution at 2042 μmol/g/h.

Original languageEnglish
Pages (from-to)30965-30973
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number59
DOIs
Publication statusPublished - 29 Nov 2019

Keywords

  • CdS
  • Cu-MOF
  • CuS
  • H production
  • Phase junction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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