李翠霞;张玉杭;胡瑞兵;BASHIR Sajid;刘静波;

• 1:兰州理工大学材料科学与工程学院
• 2:兰州理工大学有色金属先进加工与回收国家重点实验室
• 3:德克萨斯农机大学金斯维尔分校化学系
• 4:德克萨斯A&M能源研究所学院站

摘要(Abstract)：

两种不同类型的纳米材料,TiO_2和还原氧化石墨烯(Reduced graphene oxide, RGO)复合制备出性能优异的复合纳米光催化材料(RGO-TiO_2)。具备商业化前景的湿化学法制备的交互式光催化剂不仅可以对环境刺激做出反应,而且能够自我调节其结构和生物化学性质。采用溶胶-凝胶结合原位模板法制备了纳米复合粒子RGO-TiO_2,其粒径约为10.5 nm,引入水溶性聚合物聚乙烯吡咯烷酮(PVP)对RGO-TiO_2多孔纳米材料进行改性,以控制其内部通道和孔隙率,介孔孔径从3.41 nm增大到4.81 nm,大幅提高了对四环素(TCH, C_(22)H_(24)N_2O_8)的光催化降解效率。高降解效率主要源于催化剂表面H_2O和·OH吸附和扩散速率的提高以及异质结对光催化剂固有性能的改善。当其用于降解四环素医药废物时,其反应活性提高了30%。利用电子显微镜研究推断出了可能的"电子拓扑",Ti中从p轨道移动到d轨道时采用的是电子态的形状传播。电子局域化抑制了激发态电子和空穴的复合,延长带电载流子(电子、空穴和激子)寿命,从而提高了对TCH的降解效率。

关键词(KeyWords)： 纳米复合材料;还原氧化石墨烯负载二氧化钛;介孔模板;湿化学合成;光催化;四环素降解

Abstract:

Keywords:

基金项目(Foundation): Supported by the National Nature Science Foundation of China (51764039);; the Chinese Scholarship Council (201608625038);; the Petroleum Research Fund of the American Chemical Society (53827-UR10);; the Robert Welch Foundation (Departmental Grant,AC-0006)

作者(Author): 李翠霞;张玉杭;胡瑞兵;BASHIR Sajid;刘静波;

Email:

DOI: 10.13482/j.issn1001-7011.2021.08.158

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