物理化学学报2023，Vol.39Issue(6)：99-111,13.DOI:10.3866/PKU.WHXB202209016
0D/2D碳氮量子点(CNQDs)/BiOBr复合的S型异质结高效光催化降解和产H2O2
0D/2D Carbon Nitride Quantum Dots(CNQDs)/BiOBr S-Scheme Heterojunction for Robust Photocatalytic Degradation and H2O2 Production
摘要
Abstract
The construction of heterojunctions is a method employed to inhibit the rapid recombination of photogenerated carriers.In this work,zero-dimensional(0D)g-C3N4 quantum dots(CNQDs)were composited with two-dimensional(2D)BiOBr for the first time using the typical hydrothermal method under the conditions of a high temperature and high pressure,and a OD/2D CNQD/BiOBr S-scheme heterojunction with an intimate-contact interface was formed.The π-electrons in the heterocycle of the CNQDs were bound to BiOBr by interaction.The apparent reaction rate constants generated by CNQDs/BiOB-1.50％ for tetracycline(TC)and ciprofloxacin(CIP)degradation and H2O2 production were 2.02,2.91,and 1.54 times that of the original BiOBr,respectively.In the cycle test,CNQDs/BiOBr-1.50％displayed a relatively high photocatalytic activity and structural stability.X-ray photoelectron spectroscopy(XPS)analysis showed that the rr electrons in the CNQDs interacted with BiOBr,and also confirmed the flow of photogenerated electrons in this heterojunction.This successfully constructed S-scheme exhibited extraordinary photocatalytic activity and stability.The more active species and stable catalytic activity were attributed to the distinctive transfer mechanism of the carriers.This work will provide reference for constructing 0D/2D S-scheme heterojunctions for the degradation of organic pollutants and in situ production of H2O2.关键词
光催化/量子点/S型异质结/催化活性/H2O2Key words
Photocatalysis/Quantum dots/S-scheme/Catalytic activity/H2O2分类
化学引用本文复制引用
昝忠奇,李喜宝,高晓明,黄军同,罗一丹,韩露..0D/2D碳氮量子点(CNQDs)/BiOBr复合的S型异质结高效光催化降解和产H2O2[J].物理化学学报,2023,39(6):99-111,13.基金项目
This work was supported by the National Natural Science Foundation of China(51962023,22262024,51862024),the Natural Science Foundation of Jiangxi Province,China(20212BAB204045),the Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle,China(Nanchang Hangkong University)(ES202002077).国家自然科学基金(51962023,22262024,51862024),江西省自然科学基金(20212BAB204045)和江西省持久性污染物控制与资源循环重点实验室(南昌航空大学)开放基金(ES202002077)资助 （51962023,22262024,51862024）
