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氢气和氧气是清洁的和可再生的能源材料,光催化分解水制备氢气和氧气受到了广泛的关注.本文通过一个前驱体合成路线得到了氢化的TiO_2/SrTiO_3多孔微球高效光催化剂,首先,通过两步连续的溶剂热方法形成了Ti-Gly-Sr前驱体,然后,经过空气气氛下的煅烧以及氢气和氩气混合气体的还原,得到了氢化的TiO_2/SrTiO_3多孔微球光催化剂.在反应过程中,通过调节反应条件可以对缺陷以及催化剂的带隙进行调控.通过进行各种表征发现,异质结构、合适的氧空位以及特殊的多孔结构,可以有效地促进催化剂对可见光的吸收以及光生电荷的分离效率.氢化的TiO_2/SrTiO_3多孔微球光催化剂的产氢和产氧速率可以达到239.97μmol h~(-1_和103.79μmol h~(-1),比普通的TiO_2/SrTiO_3分别高出5.9和6.6倍.在光催化转换太阳能的应用中,氢化的TiO_2/SrTiO_3多孔微球复合物是一种有前景的光催化剂.
Hydrogen and oxygen are clean and renewable energy materials, photocatalytic decomposition of water to produce hydrogen and oxygen has been widely concerned.In this paper, a precursor synthesis route was hydrogenated TiO 2 / SrTiO 3 porous microspheres efficient photocatalyst, first of all, The Ti-Gly-Sr precursor was formed by a two-step continuous solvothermal method, and then hydrogenated TiO 2 / SrTiO 3 porous microspheres were obtained after calcination in air atmosphere and reduction of hydrogen and argon mixed gas. During the reaction, the defect and the band gap of the catalyst can be controlled by adjusting the reaction conditions, and through various characterizations, it is found that heterogeneous structures, suitable oxygen vacancies and special porous structures can effectively promote the catalyst’s absorption of visible light and The photocatalytic efficiency of photocatalyst of hydrogenated TiO 2 / SrTiO 3 porous microspheres can reach 239.97 μmol h -1 and 103.79 μmol h -1, respectively, which is higher than that of common TiO 2 / SrTiO 3 5.9 times and 6.6 times higher than that of hydrogenated TiO 2 / SrTiO 3 porous microspheres, which is a promising photocatalyst for photocatalytic solar energy conversion.