【摘要】 氧空位因其可以调节带隙结构、促进载流子分离以及作为活性位点改变光催化剂表面反应能垒的特点吸引了科研人员大量的关注。通过在Ar氛围中直接热解有机插层剂异丙胺（PA）处理的钛酸盐H_1.07Ti_1.73O₄（HTO）,开发了一种简便制备锐钛矿型TiO₂纳米片的方法，所获得的锐钛矿型TiO₂纳米片在保持HTO独特二维结构的同时，还含有丰富的氧空位（O_v）。催化性能试验表明：含有丰富氧空位的锐钛矿型TiO₂纳米片对罗丹明B（RhB）的光降解速率是对比样TiO₂的10倍。O_v的构建扩大了TiO₂的光吸收范围，促进了光生载流子分离，进而提升了光催化活性，且二维的纳米片结构提供了更多的活性位点用于吸附和催化RhB分子。为在TiO₂表面构建氧空位提供了新的思路。更多还原

【Abstract】 Oxygen vacancies have attracted a great deal of attention from researchers due to their ability to modulate the band gap structure, promote carrier separation, and act as active sites to change the reaction energy barriers on the surface of photocatalysts.A facile method for the preparation of anatase-type TiO₂ nanosheets was developed by direct calcination of the organic intercalated isopropylamine（PA）-treated titanate H_1.07Ti_1.73O₄（HTO） in an Ar atmosphere.The obtained anatase-type TiO₂ nanosheets were rich in oxygen vacancies（O_v） while retaining the unique two-dimensional structure of HTO.Catalytic performance tests indicated that the photodegradation rate of rhodamine B（RhB） by anatase TiO₂ nanosheets containing abundant oxygen vacancies was shown to be twice as high as that of the comparative TiO₂.The formation of O_v improved the light absorption range of TiO₂,enhanced the separation efficiency of photogenerated carriers, and improved the photocatalytic activity.Additionally, the two-dimensional nanosheet structure provided more active sites for the adsorption and catalysis of RhB molecules.The present work provides new ideas for constructing oxygen vacancies on TiO₂ surfaces.更多还原