Rationally Designed Functional Ni2P Nanoparticles as Co-Catalyst Modified CdS@g-C3N4 Heterojunction for Efficient Photocatalytic Hydrogen Evolution

被引:11
|
作者
Wang, Guorong [1 ,2 ,3 ]
Jin, Zhiliang [1 ,2 ,3 ]
机构
[1] North Minzu Univ, Sch Chem & Chem Engn, Yinchuan 750021, Peoples R China
[2] North Minzu Univ, State Ethn Affairs Commiss, Key Lab Chem Engn & Technol, Yinchuan 750021, Peoples R China
[3] North Minzu Univ, Ningxia Key Lab Solar Chem Convers Technol, Yinchuan 750021, Peoples R China
来源
CHEMISTRYSELECT | 2019年 / 4卷 / 12期
基金
中国国家自然科学基金;
关键词
CdS nanorod; g-C3N4; hydrogen production; heterojunction photocatalyst; Ni2P nanoparticles; H-2; EVOLUTION; QUANTUM DOTS; NANOROD ARRAYS; CARBON NITRIDE; Z-SCHEME; CDS; WATER; G-C3N4; FABRICATION; GRAPHENE;
D O I
10.1002/slct.201803996
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Ni2P nanoparticle contained no precious metal as co-catalyst to touch up CdS nanorods coupling with graphitic C3N4 for H-2 evolution was synthesized successfully by in-situ fabrication approach. The preparative Ni2P-CdS/g-C3N4 composite catalyst exerts remarkable hydrogen production activity and exhibit good photostability in 20 hour cycles. The hydrogen evolution rate is 9.9 times as high as that of pure CdS. Morphological characterization, optical results and electrochemical test proved that special CdS/g-C3N4 enhanced the transfer of electrons on CdS and g-C3N4, loading Ni2P co-catalyst further increased the synergistic effect in photocatalytic properties. Several characterization results such as transmission electron microscopy (TEM), X-ray diffraction (XRD), The Ultraviolet-visible spectroscopy diffuse reflectance spectroscopy (UV-vis DRS), Photoluminescence (PL) and nitrogen adsorption-desorption isotherms (BET) etc. indicate that the Ni2P nanoparticles loaded on the CdS/g-C3N4 exposed more active sites and facilitated the efficiency of photogenic electron-hole pairs separation. Optimistically, these results were good consistent with each other. This considerable performance probablely attribute to the special conduction band (CB) and valence band (VB) of CdS and g-C3N4 which form a heterojuction and the introduction of Ni2P as cocatalyst further extract photogenerated electrons that lower the over potential of H+ redution.
引用
收藏
页码:3602 / 3610
页数:9
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