基于AuMgO@TiO_(2)球壳的光热协同反应耦合集热研究

STUDY ON PHOTOTHERMAL CHEMICAL REACTION AND HEAT COLLECTION BASED ON AuMgO@TiO_(2)SPHERICAL SHELL

实验室前期搭建太阳能有序转化系统,利用太阳辐射高频波段合成碳氢燃料,低频波段转化为高品质热能。基于该系统,制备Au和MgO负载的TiO_(2)球壳材料,进行光热协同反应转化CO_(2)和H_(2)O,同时结合集热层利用导热油集热,结果表明,H_(2)、CH_(4)、CO产量分别为30.1、3.2、30.9μmol/g,系统集热效率可达39.85%。实验结合表征显示,球壳结构、Au和MgO共负载可提高材料光吸收,增强光热性能,降低电子空穴对复合率,产生氧空位,促进光热协同反应还原CO_(2)。

The solar energy orderly conversion system has been set up to synthesize hydrocarbon fuel with the high-frequency solar radiation and the low-frequency part is converted into high temperature thermal energy.Based on this system,TiO_(2)spherical shell materials loaded with Au and MgO are prepared to transform CO_(2)and H_(2)O through photothermal chemical reaction,and thermal of heat-collection layer is collected by thermal oil.The results show that H_(2),CH_(4)and CO yield are 30.1,3.2 and 30.9μmol/g respectively,and the heat collection efficiency of the system is 39.85%.The characterization results indicate that the spherical shell structure,Au and MgO co-loading improves the light absorption,enhances the photothermal properties,reduces the recombination rate of electron hole pair,generates oxygen vacancies,and promotes the photothermal chemical reaction to reduce CO_(2).