Efficient adsorption and utilization of carbon dioxide play an important role in mitigating the greenhouse effect and developing clean energy. Surface functionalization of photocatalyst is an efficient method to promote the adsorption of CO₂ and convert it into hydrocarbon fuels. In this work, tetraethylenepentamine (TEPA) is used to functionalize Ti-MCM-41 molecular sieve photocatalyst to enhance the adsorption and activation of CO₂. Ti-MCM-41 molecular sieve was modified without any precious metal additives. When the content of TEPA was 1%, the yield of CH₄ was 232 ppm g⁻¹ h⁻¹. Furthermore, the results indicate that high impregnation amount of TEPA causes strong and higher adsorption of CO₂ but inefficient for its conversion. This is probably due to the blockage of the channel when the impregnation amount of TEPA exceeds the threshold value, which hinders the further conversion of CO₂ molecules. Functionalization Ti-MCM-41 zeolite photocatalyst with amino group is the prime reason for its excellent CO₂ adsorption followed by activation capacity. In the future, this proposed composite might come up as a perspective photocatalyst in the field of photocatalysis for the purpose of environment remediation.

二氧化碳的有效吸附和利用在减轻温室效应和开发清洁能源方面起着重要作用。光催化剂的表面功能化是一种促进CO ₂吸附并将其转化为烃类燃料的有效方法。在这项工作中，四亚乙基五胺（TEPA）用于功能化Ti-MCM-41分子筛光催化剂，以增强CO ₂的吸附和活化。无需任何贵金属添加剂即可对Ti-MCM-41分子筛进行改性。当TEPA的含量为1％时，CH ₄的产率为232ppm g ^-1  h ^-1。此外，结果表明，高浸渍量的TEPA会导致强而高的CO ₂吸附但转换效率低下。这可能是由于当TEPA的浸渍量超过阈值时通道的阻塞，从而阻碍了CO ₂分子的进一步转化。具有氨基的功能化Ti-MCM-41沸石光催化剂是其出色的CO ₂吸附和随后的活化能力的主要原因。将来，这种提议的复合物可能会作为光催化领域中的一种前景光催化剂而用于环境修复。