Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 221, Issue -, Pages 63-72Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2017.04.002
Keywords
Hybrid photocatalyst; Nanostructure; Degradation; Methyl orange; Surface area
Funding
- National Research Foundation of Korea (NRF)
- Ministry of Science and technology of the Korean government (MEST) [NRF-2015R1A2A2A10003741]
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2015R1C1 A2A01052256]
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CdS, SnO2 and CdS/SnO2 hybrid photocatalyst nanostructure were synthesized using a two-step (co-pre cipitation/hydrothermal) method. The as-prepared materials were characterized by powder X-ray diffraction, transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), surface analysis (BET), photoluminescence spectra (PL), UV-Vis diffusion reflectance spectroscopy (DRS), fourier transform infrared spectroscopy (FT-IR), and photocatalytic activity. The band gap energies calculated from the DRS results are 3.30, 2.15, and 2.99 eV for pristine SnO2, CdS, and the CdS/SnO2 hybrid photocatalyst, respectively. The CdS/SnO2 hybrid photocatalyst showed more efficient charge carrier separation and improved photocatalytic degradation of methyl orange (MO). The highest degradation rate constant was achieved for the CdS/SnO2 hybrid photocatalyst (0.02434 min(-1)) compared to CdS (0.01381 min(-1)) and SnO2 (0.00878 min(-1)). The present study provides insights for improving the photocatalytic activity and photo-stability of CdS/SnO2 hybrid photocatalyst. (C) 2017 Elsevier B.V. All rights reserved.
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