Xue Yanjun, Wang Xinyu, Liang Zhangqian, Zhang Xiaoli, Tian Jian
School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
J Colloid Interface Sci. 2022 Feb 15;608(Pt 2):1229-1237. doi: 10.1016/j.jcis.2021.10.153. Epub 2021 Oct 28.
Improving the efficiency of photogenerated carrier separation is essential for photocatalytic N fixation. Herein, the 2D semi-metal 1T'-MoS was uniformly distributed in g-CN nanocages (CNNCs) by a hydrothermal method, and the 1T'-MoS/CNNC composite was obtained. 1T'-MoS as a co-catalyst can promote the transfer of electrons, improve the separation efficiency of photogenerated carriers, and also increase the number of effective active sites. In addition, the unique nanocage morphology of CNNCs is conducive to the scattering and reflection of incident light and improves the light absorption capacity. Therefore, the optimized 1T'-MoS/CNNC composite (5 wt%) shows a significantly improved photocatalytic N fixation rate (9.8 mmol L h g) and good stability, which is significantly higher than pure CNNCs (2.9 mmol L h g), Pt/CNNC (8.2 mmol L h g) and Pt/g-CN nanosheet (CNNS, 6.3 mmol L h g). This work guides guidance for the design of green and efficient N fixation photocatalysts.
提高光生载流子的分离效率对于光催化固氮至关重要。在此，通过水热法将二维半金属1T'-MoS均匀分布在g-CN纳米笼（CNNCs）中，得到1T'-MoS/CNNC复合材料。1T'-MoS作为助催化剂可以促进电子转移，提高光生载流子的分离效率，还能增加有效活性位点的数量。此外，CNNCs独特的纳米笼形态有利于入射光的散射和反射，提高光吸收能力。因此，优化后的1T'-MoS/CNNC复合材料（5 wt%）表现出显著提高的光催化固氮速率（9.8 mmol L h g）和良好的稳定性，明显高于纯CNNCs（2.9 mmol L h g）、Pt/CNNC（8.2 mmol L h g）和Pt/g-CN纳米片（CNNS，6.3 mmol L h g）。这项工作为绿色高效固氮光催化剂的设计提供了指导。
