TiO2胶体光催化降解罗丹明B染料

沈文浩; 刘天龙; 李翠翠; 陈晓彬; 李鹏华; 冯池; 陈小泉

环境工程学报

TiO2胶体光催化降解罗丹明B染料

, , , , , ,

沈文浩, 刘天龙, 李翠翠, 陈晓彬, 李鹏华, 冯池, 陈小泉. TiO2胶体光催化降解罗丹明B染料[J]. 环境工程学报, 2012, 6(6): 1863-1870.

引用本文:

沈文浩, 刘天龙, 李翠翠, 陈晓彬, 李鹏华, 冯池, 陈小泉. TiO2胶体光催化降解罗丹明B染料[J]. 环境工程学报, 2012, 6(6): 1863-1870.

Shen Wenhao, Liu Tianlong, Li Cuicui, Chen Xiaobin, Li Penghua, Feng Chi, Chen Xiaoquan. Photocatalytic degradation of dye rhodamine B by nanosized TiO2 colloids[J]. Chinese Journal of Environmental Engineering, 2012, 6(6): 1863-1870.

Citation:

Shen Wenhao, Liu Tianlong, Li Cuicui, Chen Xiaobin, Li Penghua, Feng Chi, Chen Xiaoquan. Photocatalytic degradation of dye rhodamine B by nanosized TiO2 colloids[J]. Chinese Journal of Environmental Engineering, 2012, 6(6): 1863-1870.

TiO2胶体光催化降解罗丹明B染料

1.
华南理工大学制浆造纸工程国家重点实验室，广州 510640
基金项目:
国家自然科学基金资助项目（61074109）
中图分类号: X703.1

Photocatalytic degradation of dye rhodamine B by nanosized TiO2 colloids

1.
State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou 510640， China
Fund Project:

摘要: TiO2胶体从钛氧有机物水解制备，表征的方法有：X射线衍射光谱（XRD）、激光散射粒径分布、傅立叶变换红外光谱（FT-IR）、X射线光电子谱（XPS）和透射电子显微镜（TEM）。利用罗丹明B染料分子作为探针分子研究TiO2胶体的光催化活性，分析了pH、催化剂用量、外加氧化剂（H2O2）用量及罗丹明B初始浓度对TiO2胶体光催化活性的影响。结果表明：制备的TiO2胶体粒子平均粒径为13.8 nm（激光散法测定），光催化降解罗丹明B染料的反应属于一级动力学反应，可以用Langmuir-Hinshewood模型加以描述，反应速率常数k1为0.08413 mg/(L·min)，平衡吸附常数k2为1.5305 L/mg；在pH为6，TiO2胶体用量为0.04 %，H2O2（含量30%）用量为0.2 %（V/V），光照度为69.6 μW/cm2时，5 h后罗丹明B染料的降解率可达到99%以上；相似的条件，0.2% 的P25 TiO2粉体光催化处理染料水时，罗丹明B的降解率为90%。纳米TiO2胶体不仅可以提高罗丹明B的光催化降解率，还具有用量少，可有效降低水处理成本的特点。
- TiO2胶体 /
- 光催化 /
- 罗丹明B
Abstract: Nanosized TiO2 colloid was prepared with titanyl organic compound as precursor， and then was characterized by X-ray diffraction (XRD)， particle size distribution， fourier transform infrared spectrometry (FT-IR)， X-ray photo electron spectroscopy (XPS) and transmission electron microscopy (TEM). The effects of pH， TiO2 dosage， H2O2 dosage and initial content of rhodamine B on the photocatalytic activity of TiO2 colloid were investigated. The results indicated that the mean size of the as-prepared TiO2 colloid was 13.8 nm. When the pH was 6， dosage of TiO2 colloid was 0.04 %， and dosage of H2O2 (content 30%) was 0.2%（V/V）， the photocatalytic activity of nanosized TiO2 colloid was the best， and more than 99% of the dye rhodamine B was degraded after illumination (69.6 μW/cm2) for 5 hours. Comparing to the fact that about 90% of rhodamine B was degraded when 2.0% of P25 TiO2 was applied， the photocatalytic activity of nanosized TiO2 colloid was much better than P25 TiO2. And a detailed Langmuir-Hinshelwood kinetic model was also applied to explain the photodegradation process. The photodegradation reaction is first-order kinetic reaction， the photodegradation rate constant is 0.08413 mg/(L?min)， and the adsorption equilibrium constant is 1.5305 L/mg.
- TiO2 colloids /
- photocatalytic degradation /
- dye rhodamine B

点击查看大图

计量

文章访问数: 3107
HTML全文浏览数: 1398
PDF下载数: 921
施引文献: 0

沈文浩, 刘天龙, 李翠翠, 陈晓彬, 李鹏华, 冯池, 陈小泉. TiO2胶体光催化降解罗丹明B染料[J]. 环境工程学报, 2012, 6(6): 1863-1870.

引用本文:

沈文浩, 刘天龙, 李翠翠, 陈晓彬, 李鹏华, 冯池, 陈小泉. TiO2胶体光催化降解罗丹明B染料[J]. 环境工程学报, 2012, 6(6): 1863-1870.

Citation:

TiO2胶体光催化降解罗丹明B染料

1. 华南理工大学制浆造纸工程国家重点实验室，广州 510640

收稿日期: 2011-07-31

基金项目:

国家自然科学基金资助项目（61074109）

关键词:

TiO2胶体 /
光催化 /
罗丹明B

摘要: TiO2胶体从钛氧有机物水解制备，表征的方法有：X射线衍射光谱（XRD）、激光散射粒径分布、傅立叶变换红外光谱（FT-IR）、X射线光电子谱（XPS）和透射电子显微镜（TEM）。利用罗丹明B染料分子作为探针分子研究TiO2胶体的光催化活性，分析了pH、催化剂用量、外加氧化剂（H2O2）用量及罗丹明B初始浓度对TiO2胶体光催化活性的影响。结果表明：制备的TiO2胶体粒子平均粒径为13.8 nm（激光散法测定），光催化降解罗丹明B染料的反应属于一级动力学反应，可以用Langmuir-Hinshewood模型加以描述，反应速率常数k1为0.08413 mg/(L·min)，平衡吸附常数k2为1.5305 L/mg；在pH为6，TiO2胶体用量为0.04 %，H2O2（含量30%）用量为0.2 %（V/V），光照度为69.6 μW/cm2时，5 h后罗丹明B染料的降解率可达到99%以上；相似的条件，0.2% 的P25 TiO2粉体光催化处理染料水时，罗丹明B的降解率为90%。纳米TiO2胶体不仅可以提高罗丹明B的光催化降解率，还具有用量少，可有效降低水处理成本的特点。

English Abstract

Photocatalytic degradation of dye rhodamine B by nanosized TiO2 colloids

1. State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou 510640， China

Received Date: 2011-07-31

Fund Project:

Keywords:

Abstract: Nanosized TiO2 colloid was prepared with titanyl organic compound as precursor， and then was characterized by X-ray diffraction (XRD)， particle size distribution， fourier transform infrared spectrometry (FT-IR)， X-ray photo electron spectroscopy (XPS) and transmission electron microscopy (TEM). The effects of pH， TiO2 dosage， H2O2 dosage and initial content of rhodamine B on the photocatalytic activity of TiO2 colloid were investigated. The results indicated that the mean size of the as-prepared TiO2 colloid was 13.8 nm. When the pH was 6， dosage of TiO2 colloid was 0.04 %， and dosage of H2O2 (content 30%) was 0.2%（V/V）， the photocatalytic activity of nanosized TiO2 colloid was the best， and more than 99% of the dye rhodamine B was degraded after illumination (69.6 μW/cm2) for 5 hours. Comparing to the fact that about 90% of rhodamine B was degraded when 2.0% of P25 TiO2 was applied， the photocatalytic activity of nanosized TiO2 colloid was much better than P25 TiO2. And a detailed Langmuir-Hinshelwood kinetic model was also applied to explain the photodegradation process. The photodegradation reaction is first-order kinetic reaction， the photodegradation rate constant is 0.08413 mg/(L?min)， and the adsorption equilibrium constant is 1.5305 L/mg.

全文HTML

参考文献 (0)

下载: 全尺寸图片幻灯片

返回文章

用微信扫码二维码

分享至好友和朋友圈

TiO2胶体光催化降解罗丹明B染料

Photocatalytic degradation of dye rhodamine B by nanosized TiO2 colloids

计量

出版历程

TiO2胶体光催化降解罗丹明B染料

English Abstract

Photocatalytic degradation of dye rhodamine B by nanosized TiO2 colloids

全文HTML

目录