Photodegradation performance and recyclability of a porous nitrogen and carbon co-doped TiO2/activated carbon composite prepared by an extremely fast one-step microwave method
Photodegradation performance and recyclability of a porous nitrogen and carbon co-doped TiO2/activated carbon composite prepared by an extremely fast one-step microwave method
复制标题
DOI：
10.1039/c6ra19757d
复制
发表时间：
2016-09
期刊：
影响因子：
3.9
通讯作者：
Jiang-Huai Zhou;Fangzhou Li;Chun Du;Junming Liu;Yinzhen Wang;Wei Li;Guannan He;Qinyu He
中科院分区：
文献类型：
--
作者：
Jiang-Huai Zhou;Fangzhou Li;Chun Du;Junming Liu;Yinzhen Wang;Wei Li;Guannan He;Qinyu He
近年来，微波烧结因其升温速度快、能量利用率高而成为材料科学中的常用工具。采用微波快速一步法（3 min）制备了多孔氮碳共掺杂TiO 2/活性炭（（C，N）-TiO 2/AC）复合块体材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、光致发光谱（PL）、紫外-可见漫反射光谱（UV-Vis DRS）和电导率测试对样品进行了表征。还进行了光降解和可回收性实验。为了比较，通过物理混合（C，N）-TiO 2和AC制备样品，并通过相同的技术表征和检查。光降解的甲基橙子溶液的多孔（C，N）-TiO 2/AC散装显示其良好的光催化性能，与94%的光降解发生在100分钟的照射后，在黑暗中的最初4小时的吸附。多孔（C，N）-TiO 2/AC块体也表现出非常好的可回收性，实现94%的光降解在第6次循环。结果表明，该复合材料具有成本低、制备方法简单、可回收性好等优点，可用于工业化光降解过程。
In recent years, microwave sintering has become a common tool in materials science because of its rapid heating rate and high energy utilization efficiency. In this study, a fast one-step microwave method (3 min) was employed to prepare a porous nitrogen and carbon co-doped TiO2/activated carbon ((C,N)-TiO2/AC) composite bulk material. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), and electrical conductivity measurements. Photodegradation and recyclability experiments were also performed. For comparison, a sample was made by physically mixing (C,N)-TiO2 and AC, and was characterized and examined by the same technique. The photodegradation of a methyl orange solution by the porous (C,N)-TiO2/AC bulk revealed its good photocatalytic properties, with 94% photodegradation occurring within 100 min of irradiation following the initial 4 h of adsorption in the dark. The porous (C,N)-TiO2/AC bulk also demonstrated very good recyclability, achieving 94% photodegradation in the 6th recycle. The results show that the composite material can be used in commercial photodegradation processes because of its low cost, simple method of preparation, and good recyclability.