碳掺杂TiO2光催化剂的制备及其性能表征

在室温下,以钛酸丁酯为钛源、葡萄糖为碳源,用醇解法制备了C掺杂TiO2.以活性艳红X-3B作为目标降解物,评价了不同焙烧温度、投加量和反应液初始pH值等因素对样品光催化性能的影响.利用紫外-可见漫反射(UV-Vis DRS)、X-射线粉末衍射(XRD)、热重分析(TG-DTG)、扫描电镜(SEM-EDS)等手段对样品进行理化性能表征.结果表明,C-TiO2具有典型的锐钛矿相结构,对活性艳红X-3B具有良好的可见光降解效果.在催化剂煅烧温度500℃、投加量1.5 g.L-1、pH值7~9、可见光光照2 h的条件下,对质量浓度为100 mg.L-1的活性艳红X-3B的脱色率可达70%以上.

Preparation and Characterization of Carbon-doped TiO2 Photocatalyst

Glucose and tetrabutyl titanate were used as precursors,the photocatalyst C-TiO2 was successfully prepared by alcoholysis at room temperature.The effects of calcination temperature,catalyst dosage and initial pH of reaction solution were evaluated by the photocatalytic activity of degradation reactive brilliant red X-3B.The catalysts were characterized by X-ray diffraction(XRD),UV-Vis diffuse reflectance spectra(UV-Vis DRS),thermogravimetric analysis(TG-DTG) and scanning electron microscopy(SEM-EDS).The results showed that the C-doped TiO2 has the typical anatase structure and satisfied photocatalytic efficiency on the degradation of reactive brilliant red X-3B under visible light.While the dosage of catalyst 1.5 g·L-1,pH value 7~9,calcination temperature at 500 ℃,visible light irradiation for two hours,the photocatalytic degradation of concentration is 100 mg·L-1 reactive brilliant red X-3B could reach above 70%.