三维花状纳米TiO_2的制备及光催化性能研究  

Preparation and Photocatalysis of TiO_2 Flower-like Nanostructures

作　　者：张淑敏[1] 李巧玲[1] 安长胜 李凯旋[1] 张华[1] 潘媛媛[1] 郑建兴[1] 

机构地区：[1]中北大学理学院,山西太原030051

出　　处：《化学试剂》2014年第3期243-247,共5页Chemical Reagents

基　　金：国家自然科学基金资助项目(51272239);山西省留学基金资助项目(2011-071)

摘　　要：以钛粉和过氧化氢、NaOH作为反应物,在不使用任何硬模板和表面活性剂的条件下,通过简单的水热方法制备了三维状TiO2纳米结构。对合成花状TiO2的影响因素进行了研究。采用扫描电子显微镜(SEM),透射电子显微镜(TEM),X-射线衍射(XRD)和电子能谱仪(EDS)对所制的产物形貌和晶型结构进行了表征。结果表明,花状TiO2的直径大约为4μm,单个花瓣的厚度大约为10 nm,所得产物经过550℃热处理2 h后为锐钛矿型二氧化钛结构。以罗丹明B为目标降解物,考察其光催化活性,相同条件下,其光催化活性相对于纳米颗粒的TiO2提高了大约30%。Using Ti powder and hydrogen peroxide as reagent, TiO2 nanostruetures with 3D structure were synthesized viahydrothermal method in NaOH solution without any template. The influencing factors of the synthesis of flower-like TiO2 ： hydrothermal time, hydrothermal temperature were investiga- ted. The samples were characterized by scanning electron mi- croscopy （ SEM ） , transmission electron microscopy （ TEM ） , X-ray diffraction （XRD） and electron microprobe spectrome- ter. The results show that： the diameter of flower-like TiO2 is about 4 μ m,the single petal thickness is about 10 nm. TiO2 powders are anatase after heat treatment at 550 ℃ for 2 h. RhB was used as a target molecule to estimate the photocata- lytic activity of the specimens. The photoeatalytical activity of the flower-like anatase TiO2 nanostructures is enhanced a lot compared with particle titania.

关 键 词：钛粉 花状二氧化钛 水热法 光催化活性 

分 类 号：TQ131.2[化学工程—无机化工] O614.122[理学—无机化学]