NH2-UiO-66 modification BiOBr enhancement photoreduction CO2 to CO

• Published in: Separation and purification technology Vol. 344; p. 127289
• Main Authors: Liu, Jianyang, Qin, Wenzhen, Wang, Yiqiao, Xu, Qiuhua, Xie, Yu, Chen, Yong, Dai, Yuhua, Zhang, Wei
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 20.09.2024
• Subjects: BiOBr; NH2-UiO-66; Photocatalytic CO2 reduction; Type-II heterojunction; BiOBr; Type-II heterojunction; NH2-UiO-66; Photocatalytic CO2 reduction
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/j.seppur.2024.127289

•BiOBr nanosheets modified with NH2-UiO-66 were successfully synthesized.•1 % BiOBr/NH2-UiO-66 has good reducing properties with a CO yield of 9.19 µmolg-1h−1.•The BiOBr/NH2-UiO-66 type II heterojunction was constructed. As a typical semiconductor catalyst, BiOBr has an advisable bandgap, superior light absorption properties, and a unique laminated structure. However, the slow electron-hole separation rate results in poor CO2 reduction performance. To enhance the photocatalytic efficiency of BiOBr, this study constructs BiOBr heterojunctions with Lewis basic groups by loading NH2-UiO-66 on BiOBr. The BiOBr/NH2-UiO-66 heterojunction have been built and possess stronger light response, larger specific surface area and electron-hole separation efficiency compared to pure BiOBr and NH2-UiO-66. The optimal BiOBr/NH2-UiO-66 displays that the CO yield is 9.19 μmol g-1h−1, which is 4 times higher than pure BiOBr.