Loryuenyong Vorrada, Charoensuk Jaruwan, Charupongtawitch Rachaya, Usakulwattana Amika, Buasri Achanai
J Nanosci Nanotechnol. 2016 Jan;16(1):296-302. doi: 10.1166/jnn.2016.11612.
Reduced graphene oxide (RGO)/TiO₂ nanocomposite was successfully prepared by UV-assisted photocatalytic reduction of graphene oxide (XGO) by TiO₂ nanoparticles in ethanol. The effects of XGO and RGO addition in TiO₂were characterized by transmission electron microscopy (TEM), X-ray diffractometer (XRD), diffuse reflectance UV-vis spectrophotometer (UV-vis), fourier-transform infrared spectroscopy (FTIR), photoluminescence (PL), and Brunauer-Emmett-Teller (BET) and Barrett-Joiner-Halenda (BJH) porosity analysis. The photocatalytic activity of prepared nanocomposites was evaluated from the kinetics of the photocatalytic degradation of cationic methylene blue dye under UV irradiation. Bandgap, the electron-hole recombination, specific surface area, surface functional groups, and adsorption capacity of nanocomposites were found to play a significant role in the degradation. The results revealed that RGO/TiO₂ and XGO/TiO₂ nanocomposites exhibited efficient charge separation and enhanced photocatalytic activity, compared to pristine TiO₂. Nearly 500% improvement was observed in this work.
通过在乙醇中利用二氧化钛纳米颗粒对氧化石墨烯（XGO）进行紫外光辅助光催化还原，成功制备了还原氧化石墨烯（RGO）/二氧化钛纳米复合材料。通过透射电子显微镜（TEM）、X射线衍射仪（XRD）、漫反射紫外可见分光光度计（UV-vis）、傅里叶变换红外光谱仪（FTIR）、光致发光（PL）以及布鲁诺尔-埃米特-泰勒（BET）和巴雷特-乔伊纳-哈伦达（BJH）孔隙率分析对XGO和RGO添加到二氧化钛中的效果进行了表征。根据阳离子亚甲基蓝染料在紫外光照射下光催化降解的动力学对所制备纳米复合材料的光催化活性进行了评估。发现纳米复合材料的带隙、电子-空穴复合、比表面积、表面官能团和吸附能力在降解过程中发挥了重要作用。结果表明，与原始二氧化钛相比，RGO/二氧化钛和XGO/二氧化钛纳米复合材料表现出有效的电荷分离并增强了光催化活性。在这项工作中观察到了近500%的改善。
