摘要
为了提高TiO2的光催化性能,采用水热法一步制备了TiO2/石墨烯(TiO2/RGO)复合物.采用XRD、FT-IR、RS、UV-Vis DRS、TEM等测试方法对其进行了表征,并研究了不同质量比的复合物在可见光下对甲基橙(MO)的光催化降解.结果表明:在TiO2/RGO复合物中,TiO2以10 nm左右的颗粒均匀地分散在石墨烯层上;与在同等条件下制备的TiO2相比,TiO2/RGO复合物在可见光区吸收明显增强,吸收边缘红移了20 nm;质量比为1∶0.005的TiO2/RGO复合物,2 h内的降解率达到74.79%.可见将石墨烯与TiO2复合,能够有效地提高TiO2的可见光催化性能.
To improve the photocatalytic performance of TiO2,we prepared TiO2/graphene composite（TiO2/RGO） with a one-step hydrothermal method.The products were characterized by X-ray diffraction（XRD）, Fourier transform infrared spectroscopy（FT-IR）,Raman spectra（RS）,ultraviolet-visible diffuse reflectance spectroscopy（UV-Vis DRS）,transmission electron microscopy（TEM）.The photocatalytic activities of the composites prepared with different mass ratio were evaluated using the photocatalytic degradation of methyl orange under visible light.The results showed that TiO2 particles with an average size of 10 nm were dispersed on the surface of graphene sheets uniformly in the TiO2/RGO composite.Compared with TiO2 obtained under the same conditions,the absorption of TiO2/RGO composite in the visible region was significantly enhanced and the absorption edge was showed a red shift of 20 nm.The photocatalytic degradation efficiency of the composite prepared with 1∶0.005 of mass ratio was about 74.79% after 2 h irradiation.The visible light catalytic performance of TiO2 to incorporate graphene into TiO2 can be effectively improved.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2013年第3期76-79,共4页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(21001037)
关键词
水热法
石墨烯
二氧化钛
光催化
hydrothermal method
graphene
TiO2
photocatalysis
