Xing Mingyang, Li Xiao, Zhang Jinlong
1] Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai, 200237, China [2].
1] Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai, 200237, China [2] Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
Sci Rep. 2014 Jun 30;4:5493. doi: 10.1038/srep05493.
TiO2/graphene (TiO2-x/GR) composites, which are Ti(3+) self-doped TiO2 nanorods decorated on boron doped graphene sheets, were synthesized via a simple one-step hydrothermal method using low-cost NaBH4 as both a reducing agent and a boron dopant on graphene. The resulting TiO2 nanorods were about 200 nm in length with exposed (100) and (010) facets. The samples were characterized by X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy, X-band electron paramagnetic resonance (EPR), X-ray photoelectron spectra (XPS), transmission electron microscope (TEM), Raman, and Fourier-transform infrared spectroscopy (FTIR). The XRD results suggest that the prepared samples have an anatase crystalline structure. All of the composites tested exhibited improved photocatalytic activities as measured by the degradation of methylene blue and phenol under visible light irradiation. This improvement was attributed to the synergistic effect of Ti(3+) self-doping on TiO2 nanorods and boron doping on graphene.
TiO2/石墨烯（TiO2-x/GR）复合材料是由装饰在硼掺杂石墨烯片上的Ti(3+)自掺杂TiO2纳米棒组成，通过一种简单的一步水热法合成，使用低成本的NaBH4作为石墨烯上的还原剂和硼掺杂剂。所得的TiO2纳米棒长度约为200nm，具有暴露的（100）和（010）晶面。通过X射线衍射（XRD）、紫外-可见漫反射光谱、X波段电子顺磁共振（EPR）、X射线光电子能谱（XPS）、透射电子显微镜（TEM）、拉曼光谱和傅里叶变换红外光谱（FTIR）对样品进行了表征。XRD结果表明，制备的样品具有锐钛矿晶体结构。通过在可见光照射下亚甲基蓝和苯酚的降解来衡量，所有测试的复合材料都表现出改善的光催化活性。这种改善归因于TiO2纳米棒上Ti(3+)自掺杂和石墨烯上硼掺杂的协同效应。
