Nanocomposite materials have received much attention from scientists and engineers interested in the detection and photoreduction of CO₂ compounds. Their interest is due in large part to the unique properties of these materials, including their high degree of photoactivity, thermal stability, high surface area, and malleability. In the present review, we focus on several nanocomposite types used for the detection and photochemical reduction of CO₂: titania-based nanocomposites, chalcogenide-based nanocomposites, LDHs-based nanocomposites, and MOFs-based nanocomposites. More specifically, trends in green synthesis nanocomposites, methods for detecting CO₂ compounds, and the photoreduction of those compounds are summarized in this paper. Several modified approaches to nanocomposite materials have been discussed to achieve optimum results. Generally, we find that the presence of functional active groups, doping metal, and other semiconductor materials act as catalysts, significantly enhancing the photoreduction properties of nano-materials. Moreover, we will also discuss additional challenges, especially in regard to large-scale industrial applications. In our discussion, we will highlight the use of nanocomposite-based materials in the detection and photoreduction of CO₂. It is hoped that our findings will serve as a reference and inspiration for academic researchers and industrial professionals.

纳米复合材料受到了对 CO ₂化合物的检测和光还原感兴趣的科学家和工程师的广泛关注。他们的兴趣在很大程度上归功于这些材料的独特性质，包括它们的高度光活性、热稳定性、高表面积和延展性。在本综述中，我们关注用于检测和光化学还原 CO _{2 的}几种纳米复合材料类型：基于二氧化钛的纳米复合材料、基于硫属化物的纳米复合材料、基于 LDHs 的纳米复合材料和基于 MOFs 的纳米复合材料。更具体地说，绿色合成纳米复合材料的趋势，检测 CO _{2 的}方法本文总结了这些化合物的光还原。已经讨论了几种纳米复合材料的改进方法，以获得最佳结果。通常，我们发现功能活性基团、掺杂金属和其他半导体材料的存在作为催化剂，显着增强了纳米材料的光还原性能。此外，我们还将讨论其他挑战，尤其是在大规模工业应用方面。在我们的讨论中，我们将重点介绍基于纳米复合材料的材料在 CO ₂的检测和光还原中的应用。希望我们的研究结果能为学术研究人员和行业专业人士提供参考和启发。