低碳化学与化工2024，Vol.49Issue(9)：51-61,11.DOI:10.12434/j.issn.2097-2547.20240145
自组装超分子前驱体制备g-C3N4及其光催化分解水产氢的研究
Preparation of g-C3N4 by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting
摘要
Abstract
The structural regulation of photocatalysts is important to improve the efficiency of photocatalysis.g-C3N4 was prepared from melamine as raw material,and a series of MCx-g-C3N4(x is the molar ratio of melamine to cyanuric acid,and x=1,2,3 or 4)catalysts were prepared using melamine-cyanuric acid supramolecular as precursor.XRD,FT-IR,SEM,TEM,N2 adsorption/desorption,and XPS were used to characterize g-C3N4 and MCx-g-C3N4,and it is found that g-C3N4 and MCx-g-C3N4 exhibit different morphologies,structures,compositions and specific surface areas.Among them,MC3-g-C3N4 displays porous nanosheet structure with n(C element)∶n(N element)of 1.23,and the specific surface area is 45.63 m2/g,which is 4.5 times larger than that of g-C3N4.Using Pt as the co-catalyst and triethanolamine as the sacrificial agent,the catalytic performance of catalysts for hydrogen production from photocatalytic water splitting was investigated under visible light(≥ 400 nm).The results show that MC3-g-C3N4 shows the best catalytic performance for hydrogen production from photocatalytic water splitting,and its hydrogen production rate reaches 1127.83 pmol/(h g),which is 35 times higher than that of g-C3N4.The large surface area and porous structure of MC3-g-C3N4 provide more active sites for the reaction,and the nanosheet structure shorens the migration distance of photogenerated electrons to the catalyst surface,which promotes the separation of photogenerated electrons and holes,and thus significantly improving its catalytic performance for hydrogen production from photocatalytic water splitting.关键词
光催化/可见光/产氢/超分子前驱体/氮化碳Key words
photocatalysis/visible light/hydrogen production/supramolecular precursor/carbon nitride分类
化学化工引用本文复制引用
李野,和家佳,朱传伟,张海晶,苏通明..自组装超分子前驱体制备g-C3N4及其光催化分解水产氢的研究[J].低碳化学与化工,2024,49(9):51-61,11.基金项目
国家自然科学基金(22208065) （22208065）
广西自然科学基金(2022GXNSFBA035483). （2022GXNSFBA035483）
