光催化
石墨烯
罗丹明B
纳米片
异质结
氧化物
电子受体
材料科学
载流子
接受者
化学工程
化学
纳米技术
光化学
光电子学
催化作用
有机化学
冶金
物理
工程类
凝聚态物理
作者
Xiaoge Wu,Lei Yan,Rongrong Qin,Qikai Zhang,Wei Yang,Xiaozhi Wang,Yongcai Zhang,Min Luo,Jianhua Hou
标识
DOI:10.1016/j.jes.2023.03.025
摘要
Bi2O2CO3(BOC)/Bi4O5Br2(BOB)/reduced graphene oxide (rGO) Z-scheme heterojunction with promising photocatalytic properties was synthesized via a facile one-pot room-temperature method. Ultra-thin nanosheets of BOC and BOB were grown in situ on rGO. The formed 2D/2D direct Z-scheme heterojunction of BOC/BOB with oxygen vacancies (OVs) effectively leads to lower negative electron reduction potential of BOB as well as higher positive hole oxidation potential of BOC, showing improved reduction/oxidation ability. Particularly, rGO is an acceptor of the electrons from the conduction band of BOC. Its dual roles significantly improve the transfer performance of photo-induced charge carriers and accelerate their separation. With layered nanosheet structure, rich OVs, high specific surface area, and increased utilization efficiency of visible light, the multiple synergistic effects of BOC/BOB/rGO can achieve effective generation and separation of the electron-holes, thereby generating more •O2- and h+. The photocatalytic reduction efficiency of CO2 to CO (12.91 µmol/(g·hr)) is three times higher than that of BOC (4.18 µmol/(g·hr)). Moreover, it also achieved almost 100% removal of Rhodamine B and cyanobacterial cells within 2 hours.
科研通智能强力驱动
Strongly Powered by AbleSci AI