School of Physics, College of Physical Science and Technology, Yangzhou University, Yangzhou 225000, China.
School of Environmental Science and Engineering, College of Physical Science and Technology, Yangzhou University, Yangzhou 225000, China.
Molecules. 2022 Mar 23;27(7):2069. doi: 10.3390/molecules27072069.
Photocatalytic CO reduction is a most promising technique to capture CO and reduce it to non-fossil fuel and other valuable compounds. Today, we are facing serious environmental issues due to the usage of excessive amounts of non-renewable energy resources. In this aspect, photocatalytic CO reduction will provide us with energy-enriched compounds and help to keep our environment clean and healthy. For this purpose, various photocatalysts have been designed to obtain selective products and improve efficiency of the system. Semiconductor materials have received great attention and have showed good performances for CO reduction. Titanium dioxide has been widely explored as a photocatalyst for CO reduction among the semiconductors due to its suitable electronic/optical properties, availability at low cost, thermal stability, low toxicity, and high photoactivity. Inspired by natural photosynthesis, the artificial Z-scheme of photocatalyst is constructed to provide an easy method to enhance efficiency of CO reduction. This review covers literature in this field, particularly the studies about the photocatalytic system, TiO Z-scheme heterojunction composites, and use of transition metals for CO photoreduction. Lastly, challenges and opportunities are described to open a new era in engineering and attain good performances with semiconductor materials for photocatalytic CO reduction.
光催化 CO 还原是一种很有前途的技术，可以捕获 CO 并将其还原为非化石燃料和其他有价值的化合物。如今，由于过度使用不可再生能源，我们面临着严重的环境问题。在这方面，光催化 CO 还原将为我们提供富含能量的化合物，并有助于保持环境清洁和健康。为此，设计了各种光催化剂来获得选择性产物并提高系统效率。半导体材料受到了极大的关注，并在 CO 还原方面表现出了良好的性能。由于其合适的电子/光学性质、低成本、热稳定性、低毒性和高光活性，二氧化钛作为 CO 还原的光催化剂已被广泛探索。受自然光合作用的启发，构建了人工 Z 型光催化剂，为提高 CO 还原效率提供了一种简便的方法。本综述涵盖了该领域的文献，特别是关于光催化系统、TiO Z 型异质结复合材料以及过渡金属在 CO 光还原中的应用的研究。最后，描述了挑战和机遇，以期开启工程学的新纪元，并利用半导体材料实现光催化 CO 还原的优异性能。
