物理化学学报 >> 2007, Vol. 23 >> Issue (06): 856-860.doi: 10.3866/PKU.WHXB20070612

研究论文 上一篇    下一篇

低温水热合成异形TiO2纳米晶及其表征

张霞; 赵岩; 张彩碚; 孟皓   

  1. 东北大学理学院, 沈阳 110004; 中国科学院金属研究所, 沈阳 110016

  • 收稿日期:2006-11-20 修回日期:2007-01-23 发布日期:2007-06-04
  • 通讯作者: 张霞 E-mail:zhangxia@imr.ac.cn

Synthesis and Characterization of TiO2 Nano-crystalline with Different Morphologies by Low-temperature Hydrothermal Method

ZHANG Xia; ZHAO Yan; ZHANG Cai-Bei; MENG Hao   

  1. School of Science, Northeastern University, Shenyang 110004, P. R. China; Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China

  • Received:2006-11-20 Revised:2007-01-23 Published:2007-06-04
  • Contact: ZHANG Xia E-mail:zhangxia@imr.ac.cn

摘要:

70 ℃下在钛酸四丁酯(TBOT)水热合成TiO2过程中, 加入油酸, 控制TiO2颗粒的生长方向, 无需热处理, 直接得到针状和纺锤形锐钛矿TiO2纳米晶. 应用透射电子显微镜、X 射线衍射仪对TiO2纳米晶进行了形貌观察和晶体结构的测定. 红外光谱分析表明, 油酸分子以静电作用吸附于针状TiO2纳米晶的表面. 根据UV-Vis吸收峰, 计算了TiO2纳米晶的禁带宽度. 纺锤形TiO2纳米晶具有较高的光催化活性, 60 min内催化降解了90%的罗丹明B.

关键词: TiO2纳米晶, 针状, 纺锤形, 光催化

Abstract:

Oleic acid was used in low-temperature hydrothermal reaction of tetrabutyl titanate (TBOT) to control the growth direction of TiO2 particles. TiO2 nano-crystallines in the shapes of needle and spindle were synthesized. The morphology and structure of these TiO2 particles were confirmed by means of TEM and XRD. The FT-IR spectrum analysis proved that oleic acid molecule was absorbed onto the surface of TiO2 particles through electrostatic interaction. The band-gap energies of TiO2 nano-crystallines were calculated according to their UV-Vis spectra. In the photocatalytic reaction, the spindle TiO2 particles showed higher activity, and 90% rhodanmine B was degraded in 60 min.

Key words: TiO2 nano-crystalline, Needle, Spindle, Photocatalysis

MSC2000: 

  • O643