Novel visible-light-driven AgX/graphite-like C3N4 (X = Br, I) hybrid materials with synergistic photocatalytic activity
Novel visible-light-driven AgX/graphite-like C3N4 (X = Br, I) hybrid materials with synergistic photocatalytic activity
复制标题
具有协同光催化活性的新型可见光驱动AgX/类石墨C3N4 (X = Br, I)杂化材料
DOI：
10.1016/j.apcatb.2012.08.015
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发表时间：
2013-01-17
影响因子：
22.1
通讯作者：
Wan, Huilin
中科院分区：
文献类型：
--
作者：
Xu, Hui;Yan, Jia;Wan, Huilin
采用简易水浴法合成了新型可见光驱动AgX/g-C3 N4（X = Br，I）杂化材料。采用X射线衍射（XRD）、X射线能谱（EDS）、透射电镜（TEM）、X射线光电子能谱（XPS）、紫外-可见漫反射光谱（DRS）、光致发光（PL）、傅里叶变换红外光谱（FTIR）、拉曼光谱和比表面积等手段对AgX/g-C3 N4杂化材料进行了表征。XRD、EDS、TEM、FTIR、拉曼和XPS分析表明，AgX纳米粒子在g-C3 N4表面均匀分布，形成了异质结构。以甲基橙子为目标污染物，研究了AgX/g-C3 N4杂化材料的光催化活性。所制备的AgX/g-C3 N4杂化材料显示出比纯g-C3 N4和AgX纳米粒子更高的光催化活性。AgX纳米粒子的引入使AgBr/g-C3 N4和AgI/g-C3 N4杂化材料的光电流分别比纯g-C3 N4提高了21倍和8倍。AgX/g-C3 N4杂化材料光催化活性的提高归因于g-C3 N4和AgX之间的协同效应，包括光学性能、更好的分散性和更小的尺寸。提出了AgX/g-C3 N4杂化材料的光催化机理和动力学。(C)2012爱思唯尔有限公司版权所有。
Novel visible-light-driven AgX/g-C3N4 (X = Br, I) hybrid materials were synthesized by the facile water bath method. The AgX/g-C3N4 hybrid materials were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectrometer (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL), Fourier transform infrared spectra (FTIR), Raman and the special surface area. The XRD, EDS, TEM, FTIR, Raman and XPS analyses indicated that AgX nanoparticles were evenly distributed on the surface of g-C3N4 and the heterostructures were formed. The photocatalytic activity of the AgX/g-C3N4 hybrid materials was evaluated using methyl orange as a target organic pollutant. The as-prepared AgX/g-C3N4 hybrid materials displayed much higher photocatalytic activity than the pure g-C3N4 and AgX nanoparticles. After the introduction of AgX nanoparticles, the photocurrent of the AgBr/g-C3N4 and AgI/g-C3N4 hybrid materials was found to increase by 21 and 8 times than that of the pure g-C3N4, respectively. The increased photocatalytic activity of the AgX/g-C3N4 hybrid materials was attributed to the synergic effect between g-C3N4 and AgX, which included the optical property, the better dispersion and the small size. A photocatalytic mechanism and the kinetics of AgX/g-C3N4 hybrid materials were also proposed. (C) 2012 Elsevier B.V. All rights reserved.