无模板剂的溶胶-水热法合成具有可见光响应的氮掺杂混晶TiO_2(锐钛矿/金红石/板钛矿)纳米棒束（英文）  

Template-free Sol-hydrothermal Synthesis of a Nitrogen Doped Anatase/Rutile/Brookite TiO_2 Nano-rod Bundle for Visible Light Driven Photocatalysis

作　　者：刘正江[1] 鲍晓丽 邢磊 杨桔材[1] 张前程[1] Liu Zhengjiang;Bao Xiaoli;Xing Lei;Yang Jucai;Zhang Qiancheng(Key Laboratory of Industrial Catalysis of the Inner Mongolia Autonomous Region,Inner Mongolia University of Technology,Hohhot 010051,China;Institute of Green Chemistry and Chemical Technology,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]内蒙古工业大学内蒙古自治区工业催化重点实验室,内蒙古呼和浩特010051 [2]江苏大学绿色化学与化工技术研究院,江苏镇江212013

出　　处：《稀有金属材料与工程》2019年第1期77-84,共8页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(20966006);The Graduate Student Scientific Research Innovation Projects of the Inner Mongolia Autonomous Region(B20151012809)

摘　　要：采用无模板剂的溶胶-水热法制备了具有可见光响应的N掺杂锐钛矿/金红石/板钛矿型TiO_2(N-TiO_2)纳米棒束,并利用X射线衍射(XRD)、透射电镜(TEM)、紫外-可见光漫反射光谱(UV-Vis DRS)、傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)等手段对获得的样品进行了表征。以甲基橙为模型反应物,评价了N-TiO_2纳米棒束的光催化活性。表征结果结合光催化活性评价结果显示,与P25-TiO_2相比,N掺杂、混晶及纳米棒束之间的协同作用是所制备的混晶N-TiO_2纳米棒束具有良好光催化活性的主要原因,并对混晶N-TiO_2纳米棒束光催化降解甲基橙的机理进行了探讨。Nitrogen doped anatase/rutile/brookite titanium dioxide(N-TiO2) regular nano-rod bundle photocatalyst for improving visible light photocatalytic activity was prepared through a template-free sol-hydrothermal method. The properties of the materials were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), ultraviolet-visible diffuse reflectance spectra(UV-Vis DRS), Fourier transform infrared(FTIR) spectroscopy and X-ray photoelectron spectroscopy(XPS). Photocatalytic degradation of methyl orange(MO) in an aqueous solution under visible light irradiation was used as a probe reaction to evaluate the photocatalytic activity of the mixed-phase N-TiO2 nano-rod bundle. The results of characterization combined with photocatalytic activity of MO photodegradation show that the synergistic effects among N doping, mixed-phase and nano-rod bundle structure are the main reasons to improve photocatalytic activity of mixed-phase N-TiO2 nano-rod bundle compared with P25-TiO2. The possible mechanism of MO degradation by mixed phase N-TiO2 nano-rod bundle photocatalyst was preliminarily discussed.

关 键 词：TiO2纳米棒束 混晶TiO2 氮掺杂 可见光光催化 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O643.36[理学—物理化学]