在磷酸介质中水热合成纳米TiO_2光催化剂  

Hydrothermal Synthesis and Photocatalytic Activity for TiO_2 Nanoparticles in H_3PO_4 Medium

作　　者：常怀秋[1] 杨青林[1] 郭林[1] 嵇天浩[1] 邓元[1] 江雷[2] 

机构地区：[1]北京航空航天大学材料科学与工程学院应用化学系,北京100083 [2]中国科学院化学研究所分子科学中心,北京100080

出　　处：《稀有金属》2005年第5期680-684,共5页Chinese Journal of Rare Metals

摘　　要：使用工业偏钛酸为前驱体,在磷酸介质中借助于水热合成方法,制备了二氧化钛纳米颗粒。通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、光催化活性检测仪等手段对所得的样品的形貌、晶型结构及光催化降解亚甲基蓝的性能进行了研究。结果表明,颗粒的形貌近似球形,所制得的产品均为锐钛矿相,在90℃下得到的纳米二氧化钛颗粒粒径为9 nm,随着温度的升高得到的纳米晶粒逐渐变大(约17 nm),且所得产品降解亚甲基蓝的能力较强。Anatase TiO2 nanoparticles with high photocatalytic tanic activity were d raw materi prepared using precursor in H3PO4 medium by metati hydrothermal synthesis method. The prepared samples were separated and dried. The phase components, the morphologies, grain sizes and structure of the products were characterized by using scanning electron microscopy （SEM）, transmission electronic microscopy （TEM）, X-ray diffraction （XRD） analysis. Photocatalytic activity was evaluated by PCC-2 photocatalysis evaluation checker. The results show that the TiO2 nanoparticles obtained are sphere-like and the average diameter is about 9 nm （at 90℃）. The photocatalytic activities of films with TiO2 nanoparticles obviously exceed that of commercial TiO2 photocatalyst for photocatalytic oxidation decomposition of the methylene blue under UV light irradiation.

关 键 词：TIO2纳米颗粒 水热合成 光催化活性 磷酸介质 

分 类 号：O643[理学—物理化学]