Liqun Ye, Chunqiu Han, Zhaoyu Ma
2017
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Influential Citations
156
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Quality indicators
Journal
Chemical Engineering Journal
Abstract
Abstract In this paper, transition metal phosphide (TMP) was used as cocatalyst to enhance the photocatalytic activity of Cd 0.5 Zn 0.5 S solid solution for nitrogen fixation under visible light irradiation. The Ni 2 P/Cd 0.5 Zn 0.5 S photocatalyst was characterized by X-ray diffraction patterns (XRD), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectra (DRS) and X-ray photoelectron spectroscopy (XPS). The photocatalytic data showed that Ni 2 P/Cd 0.5 Zn 0.5 S had higher activity than pure Cd 0.5 Zn 0.5 S for photocatalytic dinitrogen (N 2 ) fixation in the absence of any scavengers. After 1 h visible light irradiation (λ > 400 nm), the concentration of NH 3 reached to 101.5 μmol L −1 . And the quantum efficiency at 420 nm monochromatic light reached 4.32%, which much higher than other semiconductors. Time-resolved PL spectra, photocurrent and electrochemical impedance (EIS) spectroscopy revealed that higher photo-induced carrier separation efficiency of Ni 2 P/Cd 0.5 Zn 0.5 S. This work introduced Cd 0.5 Zn 0.5 S solid solution photocatalyst to reduce nitrogen, and offered a greenly, economically and efficiently way for nitrogen fixation.