School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
J Colloid Interface Sci. 2013 Sep 15;406:209-16. doi: 10.1016/j.jcis.2013.05.066. Epub 2013 Jun 4.
Titania and ceria incorporated rice husk silica based catalyst was synthesized via sol-gel method using CTAB and glycerol as surface directing agents at room temperature and labeled as RHS-50Ti10Ce. The catalyst was used to study the adsorption and photodegradation of methylene blue (MB) under UV irradiation. The powder XRD pattern of RHS-50Ti10Ce was much broader (2θ=25-30°) than that of the parent RHS (2θ=22°). The catalyst exhibited type IV isotherm with H3 hysteresis loop, and the TEM images showed partially ordered pore arrangements. The TGA-DTG thermograms confirmed the complete removal of the templates after calcination at 500°C. RHS-50Ti10Ce exhibited excellent adsorption capability with more than 99% removal of MB from a 40 mg L(-1) solution in just 15 min. It also decolorized an 80 mg L(-1) MB solution under UV irradiation in 210 min, which was comparable with the commercialized pure anatase TiO2.
采用溶胶-凝胶法，以十六烷基三甲基溴化铵（CTAB）和甘油为表面导向剂，在室温下合成了负载在稻壳硅上的钛酸铈（RHS-50Ti10Ce）催化剂。研究了该催化剂在紫外光照射下对亚甲基蓝（MB）的吸附和光降解性能。RHS-50Ti10Ce 的粉末 X 射线衍射（XRD）图谱比稻壳硅（RHS）的宽得多（2θ=25-30°）。催化剂表现出 IV 型等温线和 H3 滞后回线，TEM 图像显示出部分有序的孔排列。TGA-DTG 热重分析图谱证实，在 500°C 煅烧后模板完全去除。RHS-50Ti10Ce 具有优异的吸附能力，在 15 分钟内即可从 40mg/L 的 MB 溶液中去除超过 99%的 MB。在 210 分钟内，它还可以使 80mg/L 的 MB 溶液在紫外光照射下降色，这与商业化的纯锐钛矿 TiO2 相当。
