Huo Junchao, Hu Yanjie, Jiang Hao, Li Chunzhong
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Nanoscale. 2014 Aug 7;6(15):9078-84. doi: 10.1039/c4nr00972j.
A novel one-step, vapor-fed aerosol flame synthetic process (VAFS) has been developed to prepare Ti(3+) self-doped titanium dioxide (TiO2). The freshly formed TiO2 was in situ surface hydrogenated during the condensation stage by introducing H2 above the flame, and Ti(3+) ions were created near the surface of TiO2. The relative content of Ti(3+) ions near the surface of TiO2 is estimated to be 8%. Because of the high absorption of visible light and suppression of charge recombination, the photocurrent density and decomposition of MB under visible light irradiation were remarkably enhanced. This study demonstrates a simple, potential method to produce Ti(3+) self-doped TiO2 with effective photoactivity in visible light.
一种新型的一步式气相进料气溶胶火焰合成工艺（VAFS）已被开发用于制备Ti(3+)自掺杂二氧化钛（TiO₂）。通过在火焰上方引入H₂，新形成的TiO₂在冷凝阶段原位进行表面氢化，并且在TiO₂表面附近产生了Ti(3+)离子。据估计，TiO₂表面附近Ti(3+)离子的相对含量为8%。由于对可见光的高吸收和电荷复合的抑制，可见光照射下的光电流密度和亚甲基蓝的分解显著增强。这项研究展示了一种简单且有潜力的方法来制备在可见光下具有有效光活性的Ti(3+)自掺杂TiO₂。
