期刊
CHEMICAL ENGINEERING JOURNAL
卷 307, 期 -, 页码 311-318出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.08.102
关键词
Cd0.5Zn0.5S; Solid solution; Ni2P; Photocatalysis; Nitrogen fixation
资金
- National Natural Science Foundation of China [51502146, U1404506, 21671113]
- Natural Science Foundation of Henan Department of Science Technology [142102210477, 142300410423]
- Natural Science Foundation of Henan Department of Education [14A150021]
- Natural Science Foundation of Nanyang Normal University [ZX2014039]
In this paper, transition metal phosphide (TMP) was used as cocatalyst to enhance the photocatalytic activity of Cd0.5Zn0.5S solid solution for nitrogen fixation under visible light irradiation. The Ni2P/Cd0.5Zn0.5S 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 Ni2P/Cd0.5Zn0.5S had higher activity than pure Cd0.5Zn0.5S for photocatalytic dinitrogen (N-2) fixation in the absence of any scavengers. After 1 h visible light irradiation (lambda > 400 nm), the concentration of NH3 reached to 101.5 mu mol 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 Ni2P/Cd0.5Zn0.5S. This work introduced Cd0.5Zn0.5S solid solution photocatalyst to reduce nitrogen, and offered a greenly, economically and efficiently way for nitrogen fixation. (C) 2016 Elsevier B.V. All rights reserved.
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