石墨炔基S型异质结构建及平米级光催化产氢
Square meter lever and durable photocatalytic hydrogen production by manipulating the growth of a graphdiyne morphology S-scheme heterojunction
杨成 1李小红 1靳治良1
作者信息
- 1. School of Chemistry and Chemical Engineering,Ningxia Key Laboratory of Solar Chemical Conversion Technology,Key Laboratory for Chemical Engineering and Technology,State Ethnic Affairs Commission,North Minzu University,Yinchuan 750021,China
- 折叠
摘要
石墨炔由于其高载流子迁移率和有序的孔隙结构被认为是一种很有应用前景的光催化材料.本研究通过交叉偶联合成了一种新型球状石墨炔,并与棒状Mn0.2Cd0.8S耦合构建了S型异质结用于光催化析氢.结果表明,Mn0.2Cd0.8S/石墨炔异质结光催化剂表现出优异的光催化活性,产氢性能分别较Mn0.2Cd0.8S和球形石墨炔单体催化剂提升了16.78和613.2倍.同时,该催化剂应用于平米级规模产氢取得较好效果.其优异的光催化活性可归因于石墨炔的独特性能及S-scheme异质结的有效构建.通过紫外光电子能谱、原位辐射X射线光电子能谱、电子顺磁共振能谱、密度泛函理论计算和其他表征技术探究了S-scheme异质结的形成和光催化活性的增强.该工作可为石墨炔的形貌可调性制备以及高效异质结光催化剂的设计和合成提供新参考.
Abstract
Graphdiyne is a promising photocatalytic ma-terial for solar energy conversion because of its high carrier mobility and ordered pore structure.In this work,a novel spherical graphdiyne(S-GDY)was prepared by crosscoupling and cleverly coupled with rod-like Mn0.2Cd0.8S to form an S-scheme heterojunction for photocatalytic hydrogen evolution,which is applied for the first time in this field.As anticipated,the Mn0.2Cd0.8S/S-GDY heterojunction photocatalyst showed remarkable photocatalytic activity,exceeding the individual catalysts Mn0.2Cd0.8S and S-GDY by factors of 16.78 and 613.2,respectively.Moreover,it was successfully applied to hydrogen production on the square meter scale.The exceptional pho-tocatalytic activity can be ascribed to the introduction of the unique morphology of graphdiyne and the formation of the S-scheme heterojunction.The formation of the S-scheme het-erojunction and improvement of photocatalytic activity were revealed by ultraviolet photoelectron spectroscopy,in-situ ir-radiation X-ray photoelectron spectroscopy,density func-tional theory calculations,electron paramagnetic resonance,and other basic characterization methods.This work offers insights into the preparation of morphologically tunable graphdiyne and the design and synthesis of efficient hetero-junction photocatalysts.
关键词
spherical graphdiyne/Mn0.2Cd0.8S/DFT/S-scheme heterojunction/square meter-scale photocatalytic hydrogen productionKey words
spherical graphdiyne/Mn0.2Cd0.8S/DFT/S-scheme heterojunction/square meter-scale photocatalytic hydrogen production引用本文复制引用
基金项目
Natural Science Foundation of the Ningxia Hui Autonomous Region(2023AAC02046)
出版年
2024
NETL
NSTL
万方数据