Optimized synthesis of Fe-doped Ohmic Schottky heterojunctions for efficient NO_(3)-photocatalytic reduction to generate N_(2)  

作　　者：Ziqun Wang Hengtong Xia Zhihao Chen Wenzhong Yang 

机构地区：[1]School of Chemistry and Molecular Engineering,Nanjing Tech University,Nanjing 210009,China

出　　处：《Journal of Materials Science & Technology》2024年第32期17-26,共10页材料科学技术(英文版)

基　　金：financially supported by the Natural Science Foundation of Jiangsu Province(No.BK20230330);Postgradu-ate Research Practice Innovation Program of Jiangsu Province(No.KYCX22_1339);China Postdoctoral Science Foundation(No.2023M741661);Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.23KJB530009).

摘　　要：Capacitive Fe-doped Ni_(2) P(Fe_(2x) Ni_(2(1-x))P)is synthesized via the modified solvothermal method to form Ohmic Schottky heterojunctions with monolayer Ti_(3)C_(2)(MLTC).The composite(10%0.1FNP/CdS-2%MLTC)achieved a high hydrogen evolution rate(HER)of 19.18 mmol h−1 with a 50 mg sample.In a mere span of 3 h,an impressive NO_(3)-reduction of 0.42 mg/L was achieved,accompanied by an excep-tional 92%N_(2) selectivity.Quantum efficiency(QE)can reach 56.22%(λ=475 nm)by adding 0.1FNP and MLTC.In contrast to previous catalysts,the QE of visible light after 500 nm has been improved to 45.2%(λ=500 nm)or 36.4%(λ=550 nm).The significant enhancement of HER and NO_(3)-−reduction is attributed to the enhanced adsorption of oxygen-containing reactants,the lowering of the reduction over-potential,further enhanced separation efficiency of photogenerated carriers through the ohmic Schottky heterojunction after iron doping.Additionally,the observed capacitor-like nature of 0.1FNP is also an es-sential factor for the enhanced reduction ability of the composites.

关 键 词：FE-DOPING Multiphase heterojunctions Nitrate reduction DENITRIFICATION Photocatalysis 

分 类 号：TN3[电子电信—物理电子学]