Cu doping induced lattice distortion and oxygen vacancy formation in PbBiO_(2)Br:Band structure modulation enhances photocatalytic nitrogen fixation and pollutant degradation performanceOA
Photocatalytic nitrogen fixation has emerged as a sustainable alternative for ammonia synthesis,playing a crucial role in alleviating energy shortages and environmental pollution.In this study,PbBiO_(2)Br was applied to photocatalytic nitrogen fixation for the first time,and its photocatalytic performance was effectively enhanced through Cu doping.The catalyst was synthesized via a simple reduction method,and its morphology,structure,and physicochemical properties were systematically investigated using various characterization techniques and density functional theory calculations.The results revealed that the incorporation of Cu2+partially replaced Pb2+,inducing lattice distortion in PbBiO_(2)Br,promoting the formation of oxygen vacancies,and modifying its electronic band structure.Specifically,Cu doping led to a slight bandgap narrowing,a reduction in work function,and a significant upward shift in the conduction band position.These changes enhanced light absorption,facilitated charge carrier migration and separation,and improved the reduction ability of photogenerated electrons.Moreover,Cu doping promoted N_(2)adsorption and activation.Consequently,the photocatalytic nitrogen fixation performance of Cu-doped PbBiO_(2)Br was significantly enhanced,achieving an optimal nitrogen fixation rate of 293μmol L^(−1)g^(−1)h^(−1),which is 3.6 times higher than that of pristine PbBiO_(2)Br.Additionally,Cu–PbBiO_(2)Br also showed good activity in the photocatalytic degradation of RhB,with a degradation rate 4.6 times higher than that of PbBiO_(2)Br.This work offers new insights into the application of PbBiO_(2)Br in photocatalytic nitrogen fixation and offers valuable guidance for the development of highly efficient nitrogen fixation materials in the future.
Shude Yuan;Yekang Zheng;Yuxin Chu;Chuanqi Xia;Ruoyu Dong;Jiating Xu;Botao Teng;Ying Wu;Yiming He
Department of Material Science and Engineering,Zhejiang Normal University,Jinhua,321004,ChinaDepartment of Material Science and Engineering,Zhejiang Normal University,Jinhua,321004,ChinaDepartment of Material Science and Engineering,Zhejiang Normal University,Jinhua,321004,ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua,321004,ChinaDepartment of Material Science and Engineering,Zhejiang Normal University,Jinhua,321004,ChinaDepartment of Material Science and Engineering,Zhejiang Normal University,Jinhua,321004,ChinaTianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization,College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin,300457,ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua,321004,China Department of Material Science and Engineering,Zhejiang Normal University,Jinhua,321004,ChinaKey Laboratory of the Ministry of Education for Advanced Catalysis Materials,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua,321004,China Department of Material Science and Engineering,Zhejiang Normal University,Jinhua,321004,China College of Jewelry,Shanghai Jianqiao University,Shanghai,201306,China
化学化工
PbBiO_(2)BrCu dopingOxygen vacancyCharge separationPhotocatalytic N_(2)fixation
《Green Energy & Environment》 2026 (1)
P.211-223,13
financially supported by the National Natural Science Foundation of China(No.22172144 and 22272151)Key Research and Development Program of Zhejiang Province(2023C03148).
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