Phosphorus-Doped Carbon Nitride Tubes with a Layered Micro-nanostructure for Enhanced Visible-Light Photocatalytic Hydrogen Evolution
Phosphorus-Doped Carbon Nitride Tubes with a Layered Micro-nanostructure for Enhanced Visible-Light Photocatalytic Hydrogen Evolution
复制标题
具有层状微纳米结构的磷掺杂氮化碳管用于增强可见光光催化析氢
DOI：
10.1002/anie.201508505
复制
发表时间：
2016-01-26
影响因子：
16.6
通讯作者：
Fu, Honggang
中科院分区：
文献类型：
--
作者：
Guo, Shien;Deng, Zhaopeng;Fu, Honggang
由六方棒状单晶超分子前驱体（单斜晶系，C2/m）获得具有层状堆叠结构的磷掺杂六方管状氮化碳（P-TCN）。 P-TCN的生产过程包括两个步骤：1）三聚氰胺在亚磷酸辅助水热条件下原位水解，通过三聚氰胺与氰尿酸自组装制备前驱体； 2)加热下前体中心发生热解，得到六方P-TCN。管状结构有利于增强光散射和活性位点。同时，磷的引入导致带隙变窄并提高了电导率。因此，在牺牲剂存在下，P-TCN表现出67 μ mol.h(-1)（0.1 g催化剂，λ> 420 nm）的高析氢速率，并且在420 nm处表现出5.68%的表观量子效率，优于大多数报道的块状g-C3N4。
Phosphorus-doped hexagonal tubular carbon nitride (P-TCN) with the layered stacking structure was obtained from a hexagonal rod-like single crystal supramolecular precursor (monoclinic, C2/m). The production process of P-TCN involves two steps: 1) the precursor was prepared by self-assembly of melamine with cyanuric acid from in situ hydrolysis of melamine under phosphorous acid-assisted hydrothermal conditions; 2) the pyrolysis was initiated at the center of precursor under heating, thus giving the hexagonal P-TCN. The tubular structure favors the enhancement of light scattering and active sites. Meanwhile, the introduction of phosphorus leads to a narrow band gap and increased electric conductivity. Thus, the P-TCN exhibited a high hydrogen evolution rate of 67 mu mol.h(-1) (0.1 g catalyst, lambda > 420 nm) in the presence of sacrificial agents, and an apparent quantum efficiency of 5.68% at 420 nm, which is better than most of bulk g-C3N4 reported.