Yang Zekang, Xing Zipeng, Feng Qingmao, Jiang Hao, Zhang Jiaqi, Xiao Yawei, Li Zhenzi, Chen Peng, Zhou Wei
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
J Colloid Interface Sci. 2020 May 15;568:255-263. doi: 10.1016/j.jcis.2020.02.060. Epub 2020 Feb 17.
Three-dimensional mesoporous graphite-like carbon nitride (Meso-g-CN/WP/Meso-g-CN) laminated heterojunction nanosheets are successfully synthesized by solid-phase in situ reduction combined with high temperature calcination. Meso-g-CN/WP/Meso-g-CN has a relatively high specific surface area of 82 m g, a large pore size of 8-15 nm, and a narrow band gap of 2.7 eV. The solar-driven photocatalytic reaction hydrogen production rate (198.1 μmol hg) for Meso-g-CN/WP/Meso-g-CN 3D laminated heterojunctions is approximately 10 times higher than that of pristine g-CN. This discrepancy can be attributed to the synergistic effect of the 3D interbed heterojunction structure, which favors the spatial separation of photogenerated charge carriers due to its suitable band positions; its nanosheet structure, favoring the charge transfer to surface; and its mesoporous structures, offering more surface active sites and facilitating mass transfer. This novel sandwich-like laminated heterojunction structure offers new insights for the fabrication of other high-performance photocatalysts.
通过固相原位还原结合高温煅烧成功合成了三维介孔石墨相氮化碳（Meso-g-CN/WP/Meso-g-CN）层状异质结纳米片。Meso-g-CN/WP/Meso-g-CN具有相对较高的比表面积82 m²/g、8 - 15 nm的大孔径和约2.7 eV的窄带隙。Meso-g-CN/WP/Meso-g-CN三维层状异质结的太阳能驱动光催化产氢速率（~198.1 μmol h⁻¹g⁻¹）比原始g-CN高出约10倍。这种差异可归因于三维层间异质结结构的协同效应，其合适的能带位置有利于光生电荷载流子的空间分离；其纳米片结构有利于电荷转移到表面；其介孔结构提供了更多的表面活性位点并促进了传质。这种新型的三明治状层状异质结结构为制备其他高性能光催化剂提供了新的思路。
