Using solar energy for the conversion of H₂O and CO₂ into H₂, CO, CH₄, and other solar fuels have attracted great interest worldwide. However, the greatest challenge is how to use both the light energy and the heat energy to improve the utilization efficiency of solar energy. Photo-thermal chemical reaction has been used for conversing H₂O and CO₂ into H₂, CO, CH₄, and other solar fuels and improved by Au and MgO co-loaded TiO₂(AuMgTi). The average yields of CO, H_2, and CH₄ on AuMgTi were estimated to 45.495 umol/g, 45.072 umol/g, and 6.624 umol/g, respectively. Also, the selectivities of carbon-containing products increased from 29 % to 53.6 % when compared to P25. MgO on the surface of AuMgTi can enhance the chemisorption of CO₂ and initiated the CO₂ reduction reaction to converse CO₂ into CO and CH₄. Au can improve the utilization of visible light through the Localized Surface Plasmon Resonance (LSPR) effect, and reduce the recombination rate of photogenerated carriers due to the existence of the Schottky barrier. Moreover, Au might act as a catalytically active center on the surface to assist in the formation of the intermediate groups and facilitate the reaction. This study demonstrated that the AuMgTi catalyst can effectively utilize full spectrum solar energy for CO₂ reduction by photo-thermal chemical reaction.

利用太阳能将H ₂ O 和CO ₂转化为H ₂、CO、CH ₄和其他太阳能燃料已经引起了全世界的极大兴趣。然而，最大的挑战是如何同时利用光能和热能来提高太阳能的利用效率。光热化学反应已用于将 H ₂ O 和 CO ₂转化为 H ₂、CO、CH ₄和其他太阳能燃料，并通过 Au 和 MgO 共载 TiO ₂ (AuMgTi) 进行改进。CO、H ₂和 CH ₄的平均产率对 AuMgTi 的估计分别为 45.495 umol/g、45.072 umol/g 和 6.624 umol/g。此外，与 P25 相比，含碳产品的选择性从 29% 增加到 53.6%。AuMgTi表面的MgO可以增强CO ₂的化学吸附并引发CO ₂还原反应，将CO ₂转化为CO和CH ₄. Au可以通过局域表面等离子体共振（LSPR）效应提高可见光的利用率，并由于肖特基势垒的存在降低光生载流子的复合率。此外，Au 可能充当表面的催化活性中心，以帮助形成中间基团并促进反应。该研究表明，AuMgTi 催化剂可以有效地利用全光谱太阳能通过光热化学反应还原CO ₂。