摘要
光催化技术具有高效、环保、低成本的特点,已在众多应用领域中展现出巨大的潜力。传统二氧化钛(TiO_(2))是一种广泛使用的光催化材料,具有较大的禁带宽度,只能吸收紫外光;此外,TiO_(2)的光生电子-空穴对的快速复合限制了其光催化效率。在TiO_(2)表面引入氧空位等缺陷得到黑色二氧化钛(TiO_(2-x)),通过减小带隙、增加活性位点来增强其在可见光和近红外区域的响应性能与量子效率,提高其光催化活性。因此,TiO_(2-x)的合成以及改性复合成为研究的热点。该文梳理了TiO_(2-x)的重要缺陷结构及其表征方法,并对其合成方法进行了总结归纳,探讨了TiO_(2-x)的改性策略;此外,重点分析了TiO_(2-x)及其复合材料在水体污染物光催化降解的相关应用,并对降解机理进行了深入的分析和总结。最后,指出了TiO_(2-x)及复合材料在未来环境水体污染治理领域所面临的挑战与机遇。
Photocatalysis has shown great potential in many applications due to its high efficiency,environmental friendliness and low cost.Conventional titanium dioxide(TiO_(2)),a widely used photocatalytic material,has a large forbidden bandwidth,and can only absorb ultraviolet light.In addition,the rapid recombination of photogenerated electron-hole pairs of TiO_(2) limits its photocatalytic efficiency.The black titanium dioxide(TiO_(2-x))obtained by introducing oxygen vacancies and other defects on the surface of TiO_(2) enhances its response performance and quantum efficiency in the visible and near-infrared regions by reducing the band gap and increasing the active sites,which improves the photocatalytic activity.Therefore,the synthesis and modification of black titanium dioxide has become a research hotspot.In this review,the important defect structures of TiO_(2-x) and its characterization methods were combed through with the synthesis methods summarized and the modification strategies discussed.Furthermore,the applications of TiO_(2-x) and its modified materials in photocatalytic degradation of water pollutants were specifically described and the degradation mechanisms were analyzed and summarized in depth.Finally.the challenges and opportunities of TiO_(2-x) and its modified materials in the future environmental water pollution treatment were discussed.
作者
于浩
姚臻
于子游
田发忠
苏岳雄
王彦斌
于京
YU Hao;YAO Zhen;YU Ziyou;TIAN Fazhong;SU Yuexiong;WANG Yanbin;YU Jing(Key Laboratory of Environment-Friendly Composites,Engineering Research Center of Biomass Functional Composites,Key Laboratory of Environment-Friendly Composites and Biomass Utilization in Colleges and Universities,Gansu Provincial Research Center for Basic Discipline of Surface and Interface Chemistry,School of Chemical Engineering,Northwest University for Nationalities,Lanzhou 730030,Gansu,China;Northwest Yongxin Coating Co.,Ltd.,Lanzhou 730046,Gansu,China)
出处
《精细化工》
北大核心
2025年第12期2588-2602,共15页
Fine Chemicals
基金
国家自然科学基金项目(22165025,21865028)
甘肃省教育厅产业支撑计划项目(2024CYZC-04)
甘肃省自然科学基金重点项目(25JRRA037)
中央高校基本科研业务费项目(31920240047,31920240125-06)
西北民族大学化学创新团队建设项目(1001660139,1001660141)
甘肃省高校创新创业项目(2021SJCXCYXM-01,2021SJCXCYTD-01)。
关键词
黑色二氧化钛
改性材料
光催化
水体污染物
降解机理
black titanium dioxide
modified materials
photocatalysis
water pollutants
degradation mechanisms
