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›› 2010, Vol. 10 ›› Issue (4): 809-814.

• 材料工程专栏 • 上一篇    下一篇

Preparation of TiO2 Nanoparticles Coated Cotton Fibers at Low Temperature and Their Photocatalytic Activity

石中亮 卢昌岁 王海波 潘永娥 姚淑华   

  1. 沈阳化工学院无机化学教研室 沈阳化工学院无机化学教研室 沈阳化工学院无机化学教研室 沈阳化工学院无机化学教研室 沈阳化工学院 应用化学系
  • 收稿日期:2010-03-23 修回日期:2010-06-13 出版日期:2010-08-20 发布日期:2010-08-20
  • 通讯作者: 姚淑华

Preparation of TiO2 Nanoparticles Coated Cotton Fibers at Low Temperature and Their Photocatalytic Activity

SHI Zhong-liang LU Chang-sui, WANG Hai-bo, PAN Yong-e, YAO Shu-hua   

  1. Applied Chemistry College Shenyang Institute of Chemical Technology Applied Chemistry College Shenyang Institute of Chemical Technology Applied Chemistry College Shenyang Institute of Chemical Technology Applied Chemistry College Shenyang Institute of Chemical Technology Department of Applied Chemistry, Shenyang Institute of Chemical Technology
  • Received:2010-03-23 Revised:2010-06-13 Online:2010-08-20 Published:2010-08-20
  • Contact: YAO Shu-hua

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摘要： TiO2 nanoparticles coated cotton fiber composite was successfully prepared by using a sol-gel method at low temperature (about 100℃) using tetrabutyl-titanate [Ti(OBu)4] as raw material. The preparation of the TiO2 colloid and the composite were described. The properties of resulting materials were characterized by SEM and XRD, the photocatalytic degradation performance was tested using methylene blue (MB) as the target pollutant in aqueous solution. The results showed that the amorphous TiO2 nanoparticles were distributed evenly on the outer surfaces of cotton fibers, which shows efficient photocatalytic properties when exposed to UV light, the degradation rate of MB reached 95.35% under the conditions of catalyst dosage 2.5 g/L, MB concentration 50 mg/L, irradiation time 120 min, and pH 10, and the photocatalytic activity of TiO2/cotton fibers remained above 90% of its activity as-prepared after being used four times, the degradation rate of MB could reach 88.78% when irradiation time was 120 min. The photocatalytic degradation of MB could be properly described by the first-order kinetic law. By comparison of the removal rates of MB with and without UV light, it could be affirmed that the disappearance of MB was due to photodegradation rather than adsorption on cotton fibers.

关键词: TiO2 nanoparticles, cotton fibers, photocatalysis, methylene blue

Abstract: TiO2 nanoparticles coated cotton fiber composite was successfully prepared by using a sol-gel method at low temperature (about 100℃) using tetrabutyl-titanate [Ti(OBu)4] as raw material. The preparation of the TiO2 colloid and the composite were described. The properties of resulting materials were characterized by SEM and XRD, the photocatalytic degradation performance was tested using methylene blue (MB) as the target pollutant in aqueous solution. The results showed that the amorphous TiO2 nanoparticles were distributed evenly on the outer surfaces of cotton fibers, which shows efficient photocatalytic properties when exposed to UV light, the degradation rate of MB reached 95.35% under the conditions of catalyst dosage 2.5 g/L, MB concentration 50 mg/L, irradiation time 120 min, and pH 10, and the photocatalytic activity of TiO2/cotton fibers remained above 90% of its activity as-prepared after being used four times, the degradation rate of MB could reach 88.78% when irradiation time was 120 min. The photocatalytic degradation of MB could be properly described by the first-order kinetic law. By comparison of the removal rates of MB with and without UV light, it could be affirmed that the disappearance of MB was due to photodegradation rather than adsorption on cotton fibers.

Key words: TiO2 nanoparticles, cotton fibers, photocatalysis, methylene blue

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