Cr掺杂TiO2纳米线/还原氧化石墨烯复合物的制备及光催化活性  

Synthesis and Photocatalytic Activity of Cr Doped TiO_2 Nanowires/Reduced Graphene Oxide Composites

作　　者：朱洁莲[1] 夏晓峰[1] 朱珊珊[1] 刘湘[1] 李和兴[2] ZHU Jielian XIA Xiaofeng ZHU Shanshan LIU Xiang LI Hexing(Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China Key Laboratory of the Chinese Ministry of Education in Resource Chemistry, Shanghai Normal University, Shanghai 200234, China)

机构地区：[1]江南大学化学与材料工程学院,食品胶体与生物技术教育部重点实验室,无锡214122 [2]上海师范大学资源化学教育部重点实验室,上海200234

出　　处：《高等学校化学学报》2016年第10期1833-1839,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21402066)资助~~

摘　　要：以TiO_2纳米颗粒P25和氧化石墨烯(GO)为原料,Cr(NO_3)_3·9H_2O为Cr源,采用碱性水热法制备了Cr掺杂TiO_2纳米线/还原氧化石墨烯复合物(Cr-Ti O2 NWs/RGO).采用类似方法合成了TiO_2纳米线(Ti O2NWs)、Cr掺杂Ti O2纳米线(Cr-TiO_2NWs)和TiO_2纳米线/还原氧化石墨烯复合物(TiO_2 NWs/RGO)等其它样品.通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、拉曼(Raman)光谱、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和紫外-可见漫反射光谱(UV-VisDRS)等方法对样品进行了表征.测试了样品在可见光下对亚甲基蓝(MB)的降解活性,结果表明,Cr-TiO_2NWs/RGO在120 min内对MB的催化降解率为TiO_2NWs的2.2倍,催化降解速度为TiO_2NWs的5.8倍.Cr-doped TiO2 nanowires/reduced graphene oxide composites（ Cr-TiO2 NWs/RGO） were synthesized via alkaline hydrothermal method,in which commercial TiO2nanoparticles（ P25） and graphene oxide（ GO） were used as the precursors while Cr（ NO3）3·9H2O was used as the Cr source. Other samples,such as TiO2nanowires（ TiO2NWs）,were prepared via the similar method. The obtained samples were characterized by X-ray diffraction（ XRD）, Fourier transform infrared spectroscopy（ FTIR）, Raman spectroscopy,X-ray photoelectron spectroscopy（ XPS）,scanning electron microscopy（ SEM）,transmission electron microscopy（ TEM） and UV-Vis diffuse reflectance spectroscopy（ UV-Vis DRS）. The photocatalytic activities of the samples were evaluated by measuring the photodegradation of methylene blue（ MB） under visible light irradiation. The results showed that the degradation rate of MB catalyzed by Cr-TiO2 NWs/RGO was 2. 2 times that catalyzed by TiO2 NWs within 120 min,and the degradation speed of MB catalyzed by Cr-TiO2 NWs/RGO is 5. 8 times that catalyzed by TiO2 NWs.

关 键 词：Cr掺杂TiO2 石墨烯复合物 光催化 水热法 

分 类 号：O643.3[理学—物理化学]