应用化学2019，Vol.36Issue(1)：65-74,10.DOI:10.11944/j.issn.1000-0518.2019.01.180040
泡沫状氮化碳的制备及其可见光分解水产氢性能
Foam-Like Graphitic Carbon Nitride:Synthesis and Visible-Light-Driven Photocatalytic Activity for Hydrogen Evolution
摘要
Abstract
The foam-like graphitic carbon nitride (g-C3N4) was synthesized by using melamine as the raw material and cheap sepiolite as the hard template, respectively.The as-prepared samples were characterized by transmission electron microscopy (TEM) , X-ray diffraction (XRD) , Fourier transform infrared (FT-IR) spectrometry, Brunauer-Emmett-Teller (BET) method, ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) , photoluminescence (PL) spectroscopy and electrochemical measurements, and the photocatalytic activity was evaluated by visible light driven hydrogen evolution.The results show that polydopamine can act as adhesives, which can improve the combined degree between the template and melamine, leading to the increase of the specific surface area of foam-like graphitic carbon nitride.Furthermore, the specific surface area of the obtained sample increases with the increase of polydopaminemodified sepiolite, when the mass ratio of polydopamine-modified sepiolite and melamine is 2∶1, the specific surface area of the foam like g-C3N4 is as high as 389.2 m2/g and the visible light driven H2 evolution rate can reach up to 1061.87μmol/ (g·h) , which is～7 times greater than that of bulk g-C3N4 (151.24μmol/ (g·h)) and 2.6 times higher than that of g-C3N4 synthesized by unmodified sepiolite, respectively.This indicates that the foam-like g-C3N4 with a large surface area can provide more active sites and improve the diffusion process of multi-phase photocatalytic reaction, enhancing the separation efficiency of photogenerated electrons and holes.Additionally, the unique cavity structure can also effectively improve the utilization of light, leading to a significant improvement in the photocatalytic performance.关键词
泡沫状氮化碳/可见光产氢/海泡石Key words
foam-like graphitic carbon nitride/visible light driven hydrongen evolution/sepiolite分类
化学化工引用本文复制引用
李靖娥,陈烽,兰富军,赵才贤..泡沫状氮化碳的制备及其可见光分解水产氢性能[J].应用化学,2019,36(1):65-74,10.基金项目
国家自然科学基金-石油化工联合基金项目 (U1462121) （U1462121）
湘潭大学海泡石专项 (2015EP10) 项目资助 （2015EP10）
