摘要
以阴离子交换膜为隔膜,在阴极采用电化学沉淀法制备TiO2·xH2O纳米颗粒,并在不同温度下进行焙烧,得到不同晶型和粒度的TiO2.TEM和XRD分析结果表明：在773 K时TiO2微粒呈现出锐钛矿结构,粒径约为30～40 nm;在873 K时TiO2微粒出现以锐钛矿为主含有3.85%金红石相混晶结构,粒径约为50～60 nm;在1 173 K时TiO2微粒已完全转变为金红石相,粒径达到100 nm以上.
Nanometer hydrous titania was made by the method of electrolyzing deposition in the cathode chamber with the diaphragm of anion-exchange membrane. Different crystal and sizes of titania powder were made under the calcining condition of different temperatures. The results analyzed by means of TEM and XRD show that crystal of titania calcined between 623 K to 773 K was anatase phase with the size of average particles ranging from 30 to 40 nm, mainly anatase containing 3.85 percent of rutile with average particles ranging from 50 to 60 nm at 873 K, entirely rutile at 1 173 K with average particles exceeding 100 nm in size. The theory of the influence of different calcining temperatures on the crystal structure and sizes of nanometer titania and its light absorption is elementarily investigated in this paper.
出处
《黑龙江科技学院学报》
CAS
2006年第2期111-115,共5页
Journal of Heilongjiang Institute of Science and Technology
关键词
电解法
二氧化钛
纳米粉体
焙烧温度
晶型
electrolytic method
nanometer titania
calcining temperature
