摘要
以凹凸棒石为载体,钛酸四丁酯为前驱体,采用溶胶-凝胶法制备了V-Ti O_2/凹凸棒石复合光催化材料。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电镜(TEM)以及紫外-可见漫反射光谱(UV-Vis DRS)对材料的晶体结构、微观形貌及光学性能进行了表征。研究表明:凹凸棒石显著提高了材料的吸附能力,有效抑制了催化剂纳米粒子的团聚;以10 mg/L的罗丹明B溶液为目标降解物,研究了不同热处理温度下制备的V-Ti O_2/凹凸棒石(V掺量0.5%)在模拟太阳光下的降解效果,结果表明:400℃下煅烧2 h的样品性能最优;与其它对照材料相比,VTi O_2/凹凸棒石(V掺量0.5%)复合光催化材料性能更优。
V-Ti O_2/ palygorskite photocatalysts were synthesized by facile sol-gel method using palygorskite as supporter and tetrabutyl titanate( TBOT) as precursor. The crystalline,morphological and optical properties of different materials were characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM), transmission electron microscope( TEM) and UV-Vis diffuse reflectance spectroscopy( UV-Vis DRS). The research indicates that the palygorskite can enhance the adsorption ability of composite materials and prevent the catalyst nanoparticles from aggregation efficiently. The effect of calcination temperature on photocatalytic activities of V-Ti O2/ palygorskite( V content 0. 5%)was also investigated by the degradation of 10 mg / L Rhodamine B under simulated solar light. The results shows that the sample calcined at 400 ℃ with 2 h exhibits significantly enhanced activity. Compared with other reference materials,the V-Ti O2/ palygorskite( V content 0. 5%) photocatalyst exhibits a better overall performance.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2016年第3期655-660,共6页
Journal of Synthetic Crystals
基金
中央高校基本科研业务费专项资金资助(2015QH01)
