【作者】 吴道新； 陈启元； 李洁； 肖忠良； 张睿智；

【Author】 Wu Daoxin, Chen Qiyuan, Li Jie, Xiao Zhongliang, Zhang Ruizhi(College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , China ; Department of Chemistry and Environment Engineering , Changsha University of Science & Technology , Changsha 410077, China)

【机构】 中南大学化学化工学院； 长沙理工大学化学与环境工程系；

【摘要】 以钛酸四丁酯(C16H36O4Ti)为原料,采用低温水解法制备金红石型二氧化钛,在制备过程中对其进行稀土元素(La2O3,Y2O3,Er2O3, Yb2O3,Sm2O3,Gd2O3,Nd2O3)掺杂,并对所制得的掺杂样品进行X射线衍射(XRD)、紫外可见漫反射光谱(UV-Vis DRS)、荧光光谱(FL)、红外光谱(IR)分析。结果表明:对所合成的前驱物在不同的温度下进行焙烧,当温度为1000℃,掺杂稀土量为0．5％(原子分数)时所得掺杂二氧化钛已经完全转变为金红石型。煅烧温度1000℃,掺杂稀土量为0．5％时,在紫外区各种掺杂稀土元素的金红石型二氧化钛粉体的光吸收性能没有明显差异,而在可见光区掺杂Er2O3的金红石型二氧化钛粉体光吸收性能最好。激发波长为225 nm时,掺杂Sm2O3的金红石型二氧化钛粉体的发光性能最好。红外光谱结果表明,在波数3600-3100 cm-1间的吸收都是由-OH的伸缩振动引起的,波数在800～400 cm-1间的吸收峰是由Ti-O和Ti-O-Ti的振动引起的。更多还原

【Abstract】 Rare earth(La2O3, Y2O3, Er2O3, Yb2O3, Sm2O3, Gd2O3, Nd2O3)-doping rutile titania were prepared by low temperature hydrolysis using C16H36O4Ti as raw material. Powers were characterized by XRD, DRS, FL, IR. It was showed that rutile phase titania is final transformated by anatase phase titania at sinter temperature 1000 ℃ and 0.5% rare earth-doping. In UV light, absorbscence performance of all powers have no difference. But in visual the absorbscence performance of Er2O3-doping powers are the best. The photoluminescence performance of Sm2O3-doping powers are the best at the excitation wavelength. IR results show that the absorbscence peak between 3600 -3100 cm-1 is determined by stretching vibration of -OH, and the absorbscence peak between 800 - 400 cm-1 is determined by vibration of Ti-O and Ti-O -Ti.更多还原