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论文类型：期刊论文

发表时间：2017-12-31

发表刊物：APPLIED SURFACE SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：426

页面范围：1271-1280

ISSN号：0169-4332

关键字：Melamine; PAA-Ti/TiO2; Mesoporous g-C3N4/TiO2; Thermal condensation; Photocatalysis

摘要：In this paper, a novel thermal condensation method was developed for preparing mesoporous g-C3N4/TiO2 composite by using PAA-Ti/TiO2 and melamine as co-precursors. This method can not only ensure the incorporation of TiO2 nanoparticles into g-C3N4 matrix but also lead to the formation of mesoporous structures. In the heating process, polyacrylate (PAA) in the PAA-Ti/TiO2 composites can volatilizeto produce carbonous gases and its volatilization temperature falls into the temperature range formelamine condensation, which makes PAA-Ti/TiO2 a suitable pore-forming agent for fabricating mesoporous g-C3N4/TiO2. The largest surface area for the fabricated mesoporous g-C3N4/TiO2 was found to be 268 m(2)g(-1), which was approximately 7 or 12 times higher than that of TiO2 or g-C3N4. The mesoporous g-C3N4/TiO2 composite 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-C3N4 and TiO2. (C) 2017 Elsevier B.V. All rights reserved.