Triethanolamine-mediated photodeposition formation of amorphous Ni-P alloy for improved H2-evolution activity of g-C3N4  

非晶镍磷合金助剂的三乙醇胺调控光沉积制备及其增强氮化碳光催化产氢活性

作　　者：Huogen Yu Jiachao Xu Duoduo Gao Jiajie Fan Jiaguo Yu 余火根;许家超;高朵朵;范佳杰;余家国(Department of Chemistry,School of Chemistry,Chemical Engineering and Life Sciences,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450002,China;State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]Department of Chemistry,School of Chemistry,Chemical Engineering and Life Sciences,Wuhan University of Technology,Wuhan 430070,China [2]State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China [3]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450002,China [4]State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Science China Materials》2020年第11期2215-2227,共13页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21771142 and 51672203);the Fun-damental Research Funds for the Central Universities(WUT 2019IB002)。

摘　　要：Developing efficient,stable,and low-cost novel electron-cocatalysts is crucial for photocatalytic hydrogen evolution reaction.Herein,amorphous Ni-P alloy particles were successfully modified onto g-C3N4 to construct the Ni-P/g-C3N4 photocatalyst through a simple and green triethanolamine(TEOA)-mediated photodeposition method.It was found that the TEOA could serve as an excellent complexing agent to coordinate with Ni2+to form[Ni(TEOA)]^2+complex,which can promote the rapid and effective deposition of amorphous Ni-P alloy on the g-C3N4 surface.Photocatalytic tests suggest that the hydrogen-evolution performance of gC3N4 can be greatly promoted through integrating amorphous Ni-P alloy.Especially,the Ni-P/g-C3N4(5 wt%)exhibits the superior H2-generation activity(118.2μmol h^-1g^-1),which is almost 35.8 times that of bare g-C3N4.Furthermore,the amorphous Ni-P alloy cocatalyst can also serve as the general hydrogen-production cocatalyst to greatly enhance the photocatalytic performance of traditional semiconductor materials such as Ti O2 and Cd S.Based on the present results,the mechanism of the amorphous Ni-P alloy as the high-efficiency electron transfer medium was proposed for the boosted H2-generation rate.The present facile route may broaden the horizons for the efficient development of highly active cocatalysts in photocatalytic field.开发高效、稳定且低成本的新型助催化剂对于光催化制氢反应至关重要.本文通过简单、绿色的三乙醇胺(TEOA)诱导的光沉积方法,将非晶态Ni-P合金颗粒成功修饰到石墨相氮化碳(gC3N4)上,以构建Ni-P/g-C3N4光催化剂.TEOA是一种可以与Ni2+配位形成[Ni(TEOA)]^2+络合物的优良络合剂,在光照下能够促进非晶态Ni-P合金在g-C3N4表面快速有效沉积.光催化产氢测试表明,非晶态Ni-P合金的负载可以显著提高g-C3N4的光催化产氢性能,其中Ni-P/g-C3N4(5 wt%)样品具有最佳产氢性能(118.2μmol h^-1g^-1),是纯g-C3N4的35.8倍.此外,非晶态Ni-P合金还可以作为具有通用性的制氢助催化剂,可显著提高传统半导体材料(如Ti O2和Cd S)的光催化产氢性能.基于相关表征结果,本文提出了非晶态Ni-P合金作为高效电子传递介质以提高产氢速率的机理.该三乙醇胺调控的光沉积方法为新型高效助催化剂的合成与开发提供了新的思路.

关 键 词：photocatalysis H2evolution g-C3N4 amorphous NiP alloy PHOTODEPOSITION 

分 类 号：TQ116.2[化学工程—无机化工] O643.36[理学—物理化学]