Published November 2019 | Version v1
Journal article Metadata-only

The preparation and photoelectric performance of MSe2/SnO2 (M = Mo,W) nanocomposites

Creators

  • 1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR (China)
  • 2. Department of Chemistry, Xinzhou Teachers University, Xinzhou 034000, PR (China)
  • 3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR (China)

Description

Theoretical calculations were combined with experiments to explore the photoelectric catalytic performance of MSe2/SnO2 (M = Mo,W) nanocomposites. The electronic structures of the composites were studied by density functional theory(DFT) calculation. Compared with SnO2 material (1.070 eV), the band gap values of MSe2/SnO2 (M = Mo,W) nanocomposites were significantly reduced to 0.133 and 0.008 eV, respectively. Population analysis suggested that the charges transferred between upper MSe2 (M = Mo,W) and underlying SnO2, which could improve the photoelectric catalytic performance of SnO2 materials. Thus, the MSe2/SnO2 (M = Mo,W) nanocomposites were synthesized by hydrothermal method and characterized by XRD. Electrodeposition was conducted to prepare the corresponding electrodes with Fluorine-doped Tin Oxide (FTO) conductive glass to test the photoelectric catalytic performance. The experimental results showed that the photocurrents of the MSe2/SnO2 (M = Mo,W) nanocomposites were 4.8 and 3.0 μA/cm2, respectively, and the electrochemical impedance was both smaller than that of SnO2 material. Therefore, the MSe2/SnO2 (M = Mo,W) nanocomposites are good photoelectric catalytic materials.

Additional details

Identifiers

DOI
10.1016/j.apsusc.2019.07.202;
PII
S016943321932238X;

Publishing Information

Journal Title
Applied Surface Science
Journal Volume
494
Journal Page Range
p. 501-507
ISSN
0169-4332
CODEN
ASUSEE

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
55042119
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
DENSITY FUNCTIONAL METHOD; DOPED MATERIALS; ELECTROCHEMISTRY; ELECTRODEPOSITION; ELECTRODES; ELECTRONIC STRUCTURE; FLUORINE; GLASS; HYDROTHERMAL SYNTHESIS; IMPEDANCE; NANOCOMPOSITES; PERFORMANCE; PHOTOCURRENTS; TIN OXIDES; X-RAY DIFFRACTION
Descriptors DEC
CALCULATION METHODS; CHALCOGENIDES; CHEMISTRY; COHERENT SCATTERING; CURRENTS; DEPOSITION; DIFFRACTION; ELECTRIC CURRENTS; ELECTROLYSIS; ELEMENTS; HALOGENS; LYSIS; MATERIALS; NANOMATERIALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; SURFACE COATING; SYNTHESIS; TIN COMPOUNDS; VARIATIONAL METHODS

Optional Information

Copyright
Copyright (c) 2019 Elsevier B.V. All rights reserved.