纳米TiO2 具有高催化活性、高化学稳定性、成本低廉和安全无毒等优势,是目前广泛使用的一类光催化剂,但较大的禁带宽度和较高的光生电子-空穴复合速率使其光子利用率偏低.本研究利用微刻蚀法设计合成了二维TiO2 纳米片,并进一步与Ru复合,构建了三明治结构Ru@TiO2 高效光催化剂.采用不同表征手段研究了三明治结构Ru@TiO2 的表面形貌、电子结构、光电特性和光降解盐酸四环素的性能.结果表明:插入Ru将TiO2 的光响应范围由紫外光区拓展至整个可见-近红外光区,光子吸收和载流子分离效率得以提升,同时提高了体系光催化活性.模拟太阳光(AM 1.5G,100 mW·cm-2)照射 80 min,三明治结构Ru@TiO2 高效光催化剂对盐酸四环素的降解效果出色,降解效率达到 91.91%.本研究为TiO2 基高效光催化剂结构设计提供了一条有效途径.
TiO2 nanomaterials are widely used photocatalysts due to high photocatalytic activity,good chemical stability,low cost,and nontoxicity.However,its lower photon utilization efficiency is still limited by larger bandgap width and higher recombination rate between photon and hole.In this study,two-dimensional TiO2 nanosheets were synthesized via microetching,which were then inserted by ruthenium atoms to form an efficient photocatalyst Ru@TiO2 with sandwich structure.The surface morphology,electronic structure,photoelectric properties,and photo-catalytic degradation performance of tetracycline hydrochloride of Ru@TiO2 sandwich structure were investigated using different measurements.Results indicated that the material's photoresponse range extended from UV to visible-near-infrared regions,improving photon absorption and carrier separation efficiency while enhancing photocatalytic activity.Under simulated sunlight irradiation(AM 1.5 G,100 mW·cm-2)for 80 min,sandwich structured Ru@TiO2 efficient photocatalyst exhibited superior degradation performance on tetracycline hydrochloride with a degradation efficiency up to 91.91%.This work offers an effective way for the construction of efficient TiO2 based photocatalysts.
王兆阳;秦鹏;蒋胤;冯小波;杨培志;黄富强
云南师范大学 可再生能源材料先进技术与制备教育部重点实验室, 昆明 650500中国科学院 上海硅酸盐研究所, 高性能陶瓷与超微结构国家重点实验室, 上海 200050上海交通大学 材料科学与工程学院, 金属基复合材料国家重点实验室, 上海 200240
环境科学
层状二氧化钛;钌插层;光催化;盐酸四环素
layered titanium dioxide;ruthenium intercalation;photocatalysis;tetracycline hydrochloride
《无机材料学报》 2024 (004)
383-389 / 7
国家自然科学基金(U1802257,12264057);云南省基础研究重点基金(202201AS070023);"兴滇英才支持计划""春城计划"高层次人才引进培养工程(2022SCP005)National Natural Science Foundation of China(U1802257,12264057);Key Foundation of Basic Research of Yunnan Province(202201AS070023);"Yunnan Revitalization Talent Support Program"and"Spring City Plan"Introduction and Training Project of High-level Talent(2022SCP005)
10.15541/jim20230457
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