Decoration of CdMoO_(4) micron polyhedron with Pt nanoparticle and their enhanced photocatalytic performance in N_(2) fixation and water purification  

作　　者：Xujie Ren Junfeng Wang Shude Yuan Chunran Zhao Lin Yue Zhihao Zeng Yiming He 

机构地区：[1]Department of Materials Science and Engineering,Zhejiang Normal University,Jinhua 321004,China [2]Key Laboratory of Solid State Optoelectronic Devices of Zhejiang Province,Zhejiang Normal University,Jinhua 321004,China [3]Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,College of Chemistry and Materials Science,Zhejiang Normal University,Jinhua 321004,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第12期1949-1961,共13页化学科学与工程前沿（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.22172144).

摘　　要：This study aimed to prepare and apply a novel Pt/CdMoO_(4) composite photocatalyst for photocatalytic N2 fixation and tetracycline degradation. The Pt/CdMoO_(4) composite was subjected to comprehensive investigation on the morphology, structure, optical properties, and photoelectric chemical properties. The results demonstrate the dispersion of Pt nanoparticles on the CdMoO_(4) surface. Close contact between CdMoO_(4) and Pt was observed, resulting in the formation of a heterojunction structure at their contact region. Density functional theory calculation and Mott-Schottky analysis revealed that Pt possesses a higher work function value than CdMoO_(4), resulting in electron drift from CdMoO_(4) to Pt and the formation of a Schottky barrier. The presence of this barrier increases the separation efficiency of electron-hole pairs, thereby improving the performance of the Pt/CdMoO_(4) composite in photocatalysis. When exposed to simulated sunlight, the optimal Pt/CdMoO_(4) catalyst displayed a photocatalytic nitrogen fixation rate of 443.7 μmol·L‒^(1)·g‒^(1)·h‒^(1), which is 3.2 times higher than that of pure CdMoO_(4). In addition, the composite also exhibited excellent performance in tetracycline degradation, with hole and superoxide species identified as the primary reactive species. These findings offer practical insights into designing and synthesizing efficient photocatalysts for photocatalytic nitrogen fixation and antibiotics removal.

关 键 词：photocatalytic N2 fixation Pt CdMoO4 tetracycline degradation Schottky barrier 

分 类 号：O643.36[理学—物理化学]