多级Ag/Bi/氮空位g-C3N4/Ti3C2Tx肖特基结的构筑及其全光谱催化性能
Construction and full-spectrum catalytic performance of multilevel Ag/Bi/nitrogen vacancy g-C3N4/Ti3C2Tx Schottky junction
作者单位E-mail
王敏 运城学院应用化学系, 运城 044000 sustwangmin@163.com 
辛德华 运城学院应用化学系, 运城 044000  
石雅宁 运城学院应用化学系, 运城 044000  
朱文垚 运城学院应用化学系, 运城 044000  
张苑群 运城学院应用化学系, 运城 044000  
章薇 运城学院应用化学系, 运城 044000  
摘要: 采用原位溶剂热反应制备多级Ag/Bi/Nv-g-C3N4(氮空位-g-C3N4)/Ti3C2Tx肖特基结,并对其物相组成和晶体结构、微观形貌和孔结构、表面元素组成和化学态、光学和光电化学性质进行了表征。由于Ag、Bi和Ti3C2Tx协同的表面等离激元共振效应,Ag/Bi/Nv-g-C3N4/Ti3C2Tx表现出全光谱吸收特性。由载流子浓度差驱动的界面极化电荷转移诱导形成的肖特基结,显著提高了光生载流子(包括热电子和热空穴)的分离效率和利用率。因此,与Nv-g-C3N4、Ti3C2Tx、Ag/Nv-g-C3N4、Bi/Nv-g-C3N4和Ag/Bi/Nv-g-C3N4相比,Ag/Bi/Nv-g-C3N4/Ti3C2Tx表现出显著增强的全光谱催化活性,其在可见光和近红外光照射下光催化降解四环素的反应速率常数分别为0.033和0.008 6 min-1,为对比样品的10~2.1倍和8.6~1.8倍。
关键词: 肖特基结  表面等离激元共振  全光谱催化  盐酸四环素
基金项目: 山西省基础研究计划项目(No.202303021222243)、山西省高等学校科技创新项目(No.2023L306)和运城学院优秀博士来晋科研专项(No.QZX-2023014)资助。
Abstract: The multilevel Ag/Bi/Nv-g-C3N4/Ti3C2Tx (Nv-g-C3N4: nitrogen vacancy-g-C3N4) Schottky junction was prepared via an in-situ solvothermal reaction. The phase composition and crystal structure, micromorphology and pore structure, surface elemental composition and chemical state, and optical and photoelectrochemical properties were characterized. The prepared Ag/Bi/Nv-g-C3N4/Ti3C2Tx exhibited full-spectrum absorption characteristics owing to the synergistic surface plasmon resonance effect between Ag, Bi, and Ti3C2Tx. Moreover, the Schottky junction was formed through the interface polarization charge transfer driven by carrier concentration difference, resulting in the markedly improved separation efficiency and utilization of photogenerated carriers (including hot electrons and hot holes). Consequently, in comparison to Nv-g-C3N4, Ti3C2Tx, Ag/Nv-g-C3N4, Bi/Nv-g-C3N4, and Ag/Bi/Nv-g-C3N4, Ag/Bi/Nv-g-C3N4/Ti3C2Tx showed significantly enhanced full-spectrum-driven photocatalytic activity, and the reaction rate constants for photocatalytic degradation of tetracycline under visible light and near-infrared light irradiation could reach 0.033 and 0.008 6 min-1, respectively, which were approximately 10-2.1 times and 8.6-1.8 times higher than those of contract samples.
Keywords: Schottky junction  surface plasmon resonance  full-spectrum catalysis  tetracycline
投稿时间:2023-12-18 修订日期:2024-03-26
摘要点击次数:  171
全文下载次数:  89
王敏,辛德华,石雅宁,朱文垚,张苑群,章薇.多级Ag/Bi/氮空位g-C3N4/Ti3C2Tx肖特基结的构筑及其全光谱催化性能[J].无机化学学报,2024,40(6):1123-1134.
查看全文  查看/发表评论  下载PDF阅读器
Support information: