摘要
以氧化石墨烯(GO)、钼酸、硫脲和TiN为原料,成功制备了MoS_2/石墨烯/N-TiO_2(MGNT)复合材料。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HR-TEM)、X射线光电子能谱(XPS)及紫外-可见漫反射光谱(UV-Vis DRS)等手段测试分析了样品的物相组成、形貌、成分和光吸收性能。紫外-可见漫反射测试结果表明,MoS_2、石墨烯共同修饰及氮掺杂使得TiO_2的吸收带边发生红移,且其可见光吸收性能明显提高。可见光照射下降解亚甲基蓝溶液的实验结果表明,MoS_2/石墨烯共同修饰的氮掺杂TiO_2的光催化降解性能分别是氮掺杂TiO_2(NT)和石墨烯修饰氮掺杂TiO_2(GNT)的1.82倍和1.59倍,其吸附性分别为氮掺杂TiO_2、石墨烯修饰氮掺杂TiO_2的11.14倍和4.77倍。
MoS 2/graphene/N-TiO 2 composites(MGNT)were prepared using GO,H 2MoO 4,(NH 2)2CS,and TiN as the raw materials.The phase composition,morphology,chemical states of elements,and optical absorption performance were characte-rized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS)and ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS),respectively.An obvious red shift of absorption edge and enhanced intensity were observed for MGNT compared with N-TiO 2(NT)and graphene/N-TiO 2(GNT).The photocatalytic performance was evaluated via the photodegradation of methylene blue(MB)under visible light irradiation.The results showed that the photocatalytic performance of MGNT was 1.82 and 1.59 times of NT and GNT,respectively.In addition,the absorptivity of MGNT was 11.14 and 4.77 times of NT and GNT.
作者
林小靖
孙明轩
胡梦媛
姚远
王文韬
LIN Xiaojing;SUN Mingxuan;HU Mengyuan;YAO Yuan;WANG Wentao(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2018年第8期1213-1217,1235,共6页
Materials Reports
基金
上海市教育委员会科研创新项目(15ZZ092)
上海市青年教师培养资助计划(ZZgcd14010)
上海工程技术大学科研启动资助项目(2014-22)
2016年国家级大学生创新训练项目(201610856017)
