首页 | 本学科首页   官方微博 | 高级检索  
     


Hydrothermal synthesis of titanium dioxide using acidic peptizing agents and their photocatalytic activity
Authors:Jun Ho Kim  Byung Ho Noh  Gun-Dae Lee  Seong-Soo Hong
Affiliation:(1) Division of Applied Chemical Engineering, Pukyong National University, 100 Yongdang-dong, Nam-ku, 608-739 Busan, Korea
Abstract:We have prepared TiO2 nanoparticles by the hydrolysis of titanium tetraisopropoxide (TTIP) using HNO3 as a peptizing agent in the hydrothermal method. The physical properties of nanosized TiO2 have been investigated by TEM, XRD and FT-IR. The photocatalytic degradation of orange II has been studied by using a batch reactor in the presence of UV light. When the molar ratio of HNO3/TTIP was 1.0, the rutile phase appeared on the titania and the photocatalytic activity decreased with an increase of HNO3 concentration. The crystallite size of the anatase phase increased from 6.6 to 24.2 nm as the calcination temperature increased from 300 °C to 600 °C. The highest activity on the photocatalytic decomposition of orange II was obtained with titania particles dried at 105 °C without a calcination and the photocatalytic activity decreased with increasing the calcination temperature. In addition, the titania particles prepared at 180 °C showed the highest activity on the photocatalytic decomposition of orange II. This paper was prepared at the 2004 Korea/Japan/Taiwan Chemical Engineering Conference held at Busan, Korea between November 3 and 4, 2004.
Keywords:Nanosized Titania  Hydrothermal Method  Peptizing Agent  HNO3            Photocatalytic Degradation of Orange II
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号