Facile fabrication of mesoporous g-C3N4/TiO2 photocatalyst for efficient degradation of DNBP under visible light irradiation
Facile fabrication of mesoporous g-C3N4/TiO2 photocatalyst for efficient degradation of DNBP under visible light irradiation
复制标题
轻松制备介孔 g-C3N4/TiO2 光催化剂，在可见光照射下有效降解 DNBP
DOI：
10.1016/j.apsusc.2017.08.181
复制
发表时间：
2017
影响因子：
6.7
通讯作者：
Jiang Wen Feng
中科院分区：
文献类型：
--
作者：
Wei Xiao Na;Wang Hui Long;Wang Xin Kui;Jiang Wen Feng
以PAA-Ti/TiO2和三聚氰胺为共前驱体，采用热缩合法制备了g-C3N4/TiO2介孔复合材料。这种方法不仅可以保证纳米二氧化钛在g-C_3N_4基质中的掺入，而且可以形成介孔结构。在加热过程中，聚丙烯酸酯(PAA)-钛/二氧化钛复合材料中的聚丙烯酸酯(PAA)可以挥发生成碳气，其挥发温度落在三聚氰胺缩合温度范围内，这使得PAA-钛/二氧化钛是一种适合制备介孔g-C3N4/TiO2的造孔剂。所制备的介孔g-C3N4/TiO2的最大比表面积为268m2g−1，约为TiO2或g-C3N4的7倍或12倍。G-C3N4/TiO2介孔复合材料具有良好的重现性和可见光催化降解二硝基丁基苯酚(DNBP)的性能。光催化效率的提高可以归因于较大的比表面积和g-C3N4与TiO2光催化剂形成异质结界面的协同作用。
In this paper, a novel thermal condensation method was developed for preparing mesoporous g-C3N4/TiO2composite by using PAA-Ti/TiO2and melamine as co-precursors. This method can not only ensure the incorporation of TiO2nanoparticles into g-C3N4matrix but also lead to the formation of mesoporous structures. In the heating process, polyacrylate (PAA) in the PAA-Ti/TiO2composites can volatilize to produce carbonous gases and its volatilization temperature falls into the temperature range for melamine condensation, which makes PAA-Ti/TiO2a suitable pore-forming agent for fabricating mesoporous g-C3N4/TiO2. The largest surface area for the fabricated mesoporous g-C3N4/TiO2was found to be 268 m2g−1, which was approximately 7 or 12 times higher than that of TiO2or g-C3N4. The mesoporous g-C3N4/TiO2composite exhibited excellent reproducibility and good performance in the photocatalytic decomposition of dinitro butyl phenol (DNBP) under visible-light illumination. The enhanced photocatalytic efficiency can be attributed to the synergetic effects of large surface area and the formation of heterojunction interface between g-C3N4and TiO2.