Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia.
Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia; Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia.
Carbohydr Polym. 2016 Aug 1;146:166-73. doi: 10.1016/j.carbpol.2016.03.050. Epub 2016 Mar 19.
Visible light driven C-doped mesoporous TiO2 (C-MTiO2) nanorods have been successfully synthesized through green, low cost, and facile approach by sol-gel bio-templating method using regenerated cellulose membrane (RCM) as nanoreactor. In this study, RCM was also responsible to provide in-situ carbon sources for resultant C-MTiO2 nanorods in acidified sol at low temperatures. The composition, crystallinity, surface area, morphological structure, and optical properties of C-MTiO2 nanorods, respectively, had been characterized using FTIR, XRD, N2 adsorption/desorption, TEM, UV-vis-NIR, and XPS spectroscopy. The results suggested that the growth of C-MTiO2 nanorods was promoted by the strong interaction between the hydroxyl groups of RCMs and titanium ion. Optical and XPS analysis confirmed that carbon presence in TiO2 nanorods were responsible for band-gap narrowing, which improved the visible light absorption capability. Photocatalytic activity measurements exhibited the capability of C-MTiO2 nanorods in degradation of methyl orange in aqueous solution, with 96.6% degradation percentage under visible light irradiation.
通过绿色、低成本且简便的溶胶-凝胶生物模板法，利用再生纤维素膜（RCM）作为纳米反应器，成功制备了可见光驱动的 C 掺杂介孔 TiO2（C-MTiO2）纳米棒。在这项研究中，RCM 还负责在低温下的酸化溶胶中为所得的 C-MTiO2 纳米棒提供原位碳源。分别采用傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、氮气吸附/脱附、透射电子显微镜（TEM）、紫外可见近红外分光光度计（UV-vis-NIR）和 X 射线光电子能谱（XPS）对 C-MTiO2 纳米棒的组成、结晶度、比表面积、形貌结构和光学性质进行了表征。结果表明，RCM 的羟基与钛离子之间的强烈相互作用促进了 C-MTiO2 纳米棒的生长。光学和 XPS 分析证实，TiO2 纳米棒中存在的碳是导致带隙变窄的原因，从而提高了可见光吸收能力。光催化活性测量表明，C-MTiO2 纳米棒在水溶液中对甲基橙的降解能力很强，在可见光照射下的降解率达到 96.6%。
