催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (11): 1762-1767.DOI: 10.3724/SP.J.1088.2011.10755

• 研究论文 • 上一篇    下一篇

碱法纳米纤维素模板剂合成介孔 TiO2 及其性能

陈孝云1,*, 陈星2, 洪时伟1, 陈筱1, 黄彪1   

  1. 1福建农林大学材料工程学院, 福建福州 350002; 2福建农林大学机电工程学院, 福建福州 350002
  • 收稿日期:2011-07-27 修回日期:2011-09-07 出版日期:2011-11-14 发布日期:2015-03-30

Synthesis and Properties of Mesoporous TiO2 Using Nano-cellulose Template Prepared by Alkali Method

CHEN Xiaoyun1,*, CHEN Xing2, HONG Shiwei1, CHEN Xiao1, HUANG Biao1   

  1. 1College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China; 2College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
  • Received:2011-07-27 Revised:2011-09-07 Online:2011-11-14 Published:2015-03-30

PDF

3132

摘要： 以生物可再生资源碱法纳米纤维素为模板剂, TiCl4 为钛源, 采用液相水解-沉淀法合成了具有介孔结构的 TiO2 光催化剂, 采用透射电镜、X 射线衍射、热重差热、低温 N2 物理吸附-脱附等技术对催化剂进行了表征, 并以苯酚为模型物, 考察了介孔 TiO2 的光催化活性. 结果表明, 所得 TiO2 催化剂具有良好的孔隙结构, 平均孔径 6.17 nm、比表面积 176.3 m2/g、平均晶粒尺寸 13.5 nm. 碱法纳米纤维素的加入在一定程度上提高了锐钛矿相向金红石相转变的温度. 该 TiO2 晶粒小、孔隙较多、比表面积大、吸附性能强, 因此表现出较高的光催化活性.

关键词: 二氧化钛, 纳米纤维素, 介孔, 光催化, 模板, 苯酚

Abstract: Mesoporous TiO2 was synthesized by a hydrolysis-precipitation method using biological renewable resources of nano-cellulose as template and using TiCl4 as precursor. The photocatalytic activity of TiO2 was investigated by the degradation of phenol under ultraviolet light irradiation. Transmission electron microscopy, X-ray diffraction, thermogravimetry-differential thermal analysis, and N2 adsorption-desorption were used for catalyst characterization. The results showed that TiO2 synthesized with alkali nano-cellulose template exhibited high activity under UV irradiation. The material had average size of about 13.5 nm in diameter and exhibited mesoporous structure with specific area of 176 m2/g and average pore size of 6.17 nm. The addition of alkali nano-cellulose template can retard phase transformation. The higher photocatalytic activity was attributed to the small grain size, more pores, and higher specific surface area of the catalyst.

Key words: titania, nano-cellulose, mesoporous, photocatalysis, template, phenol