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In situ preparation of a novel Z-scheme BiOBr/BiVO4 composite film with enhanced photocatalytic CO2 reduction performance
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2023-11-28 , DOI: 10.1039/d3se01001e Zhiyu Li 1 , Bo Liu 1 , Xiaochao Zhang 1 , Changming Zhang 2 , Yadong Bai 1 , Jianxin Liu 1 , Yawen Wang 1 , Song Yang 1 , Rui Li 3 , Caimei Fan 1
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2023-11-28 , DOI: 10.1039/d3se01001e Zhiyu Li 1 , Bo Liu 1 , Xiaochao Zhang 1 , Changming Zhang 2 , Yadong Bai 1 , Jianxin Liu 1 , Yawen Wang 1 , Song Yang 1 , Rui Li 3 , Caimei Fan 1
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A kind of novel Z-scheme BiOBr/BiVO4 composite film has been successfully synthesized on a Bi plate by the electrochemical ion-exchange method using BiOBr nanosheets as the template and NH4VO3 as the ion-exchange source. Under simulated sunlight irradiation, the BiOBr/BiVO4 composite film exhibits excellent photocatalytic CO2 reduction activity to CO with a production rate of 95.27 μmol g−1 h−1, 1.62 and 1.39 times higher than that of pure BiVO4 and BiOBr, respectively, which should be attributed to the significantly enhanced separation of photogenerated carriers owing to the formation of a Z-scheme heterojunction structure between BiOBr and BiVO4 interfaces. The Z-type transfer path of photoinduced electrons in BiOBr/BiVO4 composite films is confirmed through the calculated work functions of BiOBr and BiVO4 using density functional theory (DFT). This work should provide new important insights into the immobilization of highly efficient Bi-based photocatalysts and their application in the photocatalytic CO2 green conversion into high value-added chemicals or fuels.
中文翻译：
原位制备新型 Z 型 BiOBr/BiVO4 复合薄膜，增强光催化 CO2 还原性能
以BiOBr纳米片为模板，NH 4 VO 3为离子交换源，采用电化学离子交换法在Bi板上成功合成了一种新型Z型BiOBr/BiVO 4复合薄膜。在模拟太阳光照射下，BiOBr/BiVO 4复合膜表现出优异的光催化CO 2还原CO活性，产率为95.27 μmol g -1 h -1 ，分别是纯BiVO 4和BiOBr的1.62和1.39倍。 ，这应归因于BiOBr和BiVO 4界面之间形成Z型异质结结构，从而显着增强了光生载流子的分离。利用密度泛函理论(DFT)计算BiOBr和BiVO 4的功函数，证实了BiOBr/BiVO 4复合薄膜中光生电子的Z型传输路径。这项工作将为高效Bi基光催化剂的固定化及其在光催化CO 2绿色转化为高附加值化学品或燃料中的应用提供新的重要见解。
更新日期：2023-11-28
中文翻译：
原位制备新型 Z 型 BiOBr/BiVO4 复合薄膜，增强光催化 CO2 还原性能
以BiOBr纳米片为模板，NH 4 VO 3为离子交换源，采用电化学离子交换法在Bi板上成功合成了一种新型Z型BiOBr/BiVO 4复合薄膜。在模拟太阳光照射下，BiOBr/BiVO 4复合膜表现出优异的光催化CO 2还原CO活性，产率为95.27 μmol g -1 h -1 ，分别是纯BiVO 4和BiOBr的1.62和1.39倍。 ，这应归因于BiOBr和BiVO 4界面之间形成Z型异质结结构，从而显着增强了光生载流子的分离。利用密度泛函理论(DFT)计算BiOBr和BiVO 4的功函数，证实了BiOBr/BiVO 4复合薄膜中光生电子的Z型传输路径。这项工作将为高效Bi基光催化剂的固定化及其在光催化CO 2绿色转化为高附加值化学品或燃料中的应用提供新的重要见解。
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