Wang Libin, Zang Linlin, Shen Fengtong, Wang Jingzhen, Yang Zhiyu, Zhang Yanhong, Sun Liguo
School of Chemical Engineering and Materials, Heilongjiang University, Harbin 150080, PR China.
School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China.
J Colloid Interface Sci. 2022 Sep 15;622:336-346. doi: 10.1016/j.jcis.2022.04.099. Epub 2022 Apr 28.
Carbon nitride-based photocatalysts for CO reduction have received great attention. The introduction of transition metals can effectively improve the photocatalytic efficiency of carbon nitride. However, how to introduce transition metals into carbon nitride in more ways remains a challenge. Herein, the Cu modified g-CN nanorod bundles (CCNBs) were prepared by chemical vapor co-deposition using the mixture of urea and chlorophyllin sodium copper salt as precursor. The prepared CCNBs exhibited excellent photocatalytic activity for CO reduction. The unique hierarchical structure was beneficial to enhance light harvesting. Besides, the introduction of uniformly dispersed Cu further improved the absorption capacity of visible light, increased active sites, and promoted the separation and transfer of carriers. The CO yield of CCNBs was 5 times higher than that of bulk g-CN, and showed excellent stability in cycle experiments. This work provides a strategy to prepare carbon nitride-based photocatalysts for efficient CO reduction.
用于CO还原的氮化碳基光催化剂受到了广泛关注。过渡金属的引入可以有效提高氮化碳的光催化效率。然而，如何以更多方式将过渡金属引入氮化碳仍然是一个挑战。在此，以尿素和叶绿素铜钠盐的混合物为前驱体，通过化学气相共沉积法制备了Cu修饰的g-CN纳米棒束（CCNBs）。所制备的CCNBs对CO还原表现出优异的光催化活性。独特的分级结构有利于增强光捕获。此外，均匀分散的Cu的引入进一步提高了可见光的吸收能力，增加了活性位点，并促进了载流子的分离和转移。CCNBs的CO产率比块状g-CN高5倍，并且在循环实验中表现出优异的稳定性。这项工作为制备用于高效CO还原的氮化碳基光催化剂提供了一种策略。
