Photocatalytic Properties of Zinc Selenide and Cobalt Selenide Nanocomposite

Abstract

In recent years, the environmental pollution caused by organic dyes has become more and more serious, so the removal of organic dyes has been paid more and more attention. In this work, ZnSe/CoSe was synthesized by hydrothermal method, and the activity of the composite photocatalytic materials was detected by visible light catalytic degradation of methylene blue. The nanocomposites were characterized by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), Energy Dispersive Spectrometer (EDS), X-ray Powder Diffraction (XRD), Ultraviolet Diffuse Reflection Spectrum (UV-Vis), Brunner−Emmet−Teller Measurements (BET), and X-ray Photoelectron Spectroscopy (XPS). The catalytic effect was the most obvious when the composite ratio was 1:7.5, with the removal rate reaching to 99.4 % of 20 mg/L MB within 120 min of visible light irradiation. Therefore, ZnSe/CoSe has a broader application prospect due to its high efficiency and low price.