柠檬酸络合法合成H2SrTa2O7材料及其光催化还原CO2活性（英文）

Polymerizable complex synthesis of H2SrTa2O7 photocatalysts for photocatalytic CO2 reduction

利用柠檬酸络合法及离子交换合成质子化钙钛矿H2SrTa2O7(HST)光催化材料. HST的比表面积和结晶度由焙烧温度控制调节.结果表明,当焙烧温度为1000℃时, HST同时具有较高的结晶度和大的比表面积从而具有最高的活性, CO的最大生产速率为0.25μmol·g^-1·h^-1.另外,相对于H2的析出, CO的产生更依赖于大的比表面积.该工作对制备高活性的还原CO2光催化剂材料具有一定的指导意义.

H2SrTa2O7 (HST) photocatalysts were prepared by polymerizable complex (PC) and ion-exchange methods for photocatalytic CO2 reduction. The crystalline quality and specific surface area of HST were controlled by adjusting calcination temperatures. The HST sample possesses the highest photocatalytic activity of CO evolution when the calcination temperature is 1 000 ℃, which should be attributed to relatively high crystalline quality and large specific surface area. The maximum CO evolution rate of HST obtained at 1 000 ℃ is 0.25 μmol·g^-1 ·h^-1 . of note, compared with comparing to the reaction toward H2 evolution, the high activity of the reaction toward CO evolution depends more on the large specific surface area of the photocatalyst. This work provides guidance on preparing photocatalysts with high photocatalytic activity for CO2 reduction.