Xiao Jie, Zhang Jing-Wen, Zhang Jiaxiang, Pan Lun, Shi Chengxiang, Zhang Xiangwen, Zou Ji-Jun
Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University and, Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R. China.
Chemistry. 2021 Dec 15;27(70):17628-17636. doi: 10.1002/chem.202103092. Epub 2021 Nov 10.
Improving the insufficient carrier separation dynamics is still of significance in carbon nitride (C N ) research. Extensive research has been devoted to improving the carrier separation efficiency through a single strategy, while ignoring the synergistic enhancement effect produced by coupling two or more conventional strategies. Herein, we reported the fabrication of cyano group-containing Fe-doped C N porous materials via direct co-calcination of iron acetylacetonate and melamine for synergistically improving the photocatalytic performance. Iron acetylacetonate can promote the generation of cyano groups and form Fe-doping in C N , thereby increasing the visible-light absorption and reactive sites. Further, the internal donor-acceptor system formed by cyano groups and Fe-doped sites promoted charge carrier separation and inhibited the radiation recombination of e -h pairs. The optimized photocatalytic activity of Fe-CN-2 sample was 4.5 times of bulk C N (BCN).
改善不足的载流子分离动力学在氮化碳（CN）研究中仍然具有重要意义。大量研究致力于通过单一策略提高载流子分离效率，却忽略了耦合两种或更多传统策略所产生的协同增强效应。在此，我们报道了通过乙酰丙酮铁和三聚氰胺直接共煅烧制备含氰基的铁掺杂CN多孔材料，以协同提高光催化性能。乙酰丙酮铁可促进氰基的生成并在CN中形成铁掺杂，从而增加可见光吸收和反应位点。此外，由氰基和铁掺杂位点形成的内部供体-受体体系促进了电荷载流子分离，并抑制了e-h对的辐射复合。Fe-CN-2样品优化后的光催化活性是体相CN（BCN）的4.5倍。
