N,S,N-S共掺杂P25可见光催化降解酸性红B活性比较研究

为了提高P25的光催化性能,以尿素、硫脲和甲硫氨酸为改性剂,采用研磨共煅烧的方法分别制备了具有可见光催化活性的改性催化剂N-P25,S-P25和N,S-P25,利用扫描电镜和紫外-可见吸收光谱对改性光催化剂的性质进行了表征,同时考察了改性光催化剂在可见光下对酸性红B的降解性能。结果表明,N-P25,S-P25和N,S-P25改性光催化剂的光响应波长范围扩大,在紫外光区及可见光区均产生较强吸收;煅烧温度700℃,煅烧时间2.0h制得的N,S-P25催化活性最高,且在可见光条件下对酸性红B的降解符合表观一级反应动力学。研究证明,改性P25催化剂提高了P25在可见光条件下降解酸性红B的光催化性能,丰...

Full description

Saved in:
Bibliographic Details
Published in河北科技大学学报 Vol. 38; no. 1; pp. 87 - 93
Main Author 罗晓 杨勤 宋曰超 郝彤遥 岳琳
Format Journal Article
LanguageChinese
Published 河北科技大学环境科学与工程学院,河北石家庄050018 2017
河北省污染防治生物技术实验室,河北石家庄 050018
Subjects
P25
光催化氧化
可见光
水污染防治工程
非金属掺杂
photocatalysis oxidation
P25
nonmetal doping-modification
光催化氧化
非金属掺杂
visible light
可见光
water pollution control engineering
水污染防治工程
Online AccessGet full text
ISSN1008-1542
DOI10.7535/hbkd.2017yx01014

Cover

More Information
Summary:为了提高P25的光催化性能,以尿素、硫脲和甲硫氨酸为改性剂,采用研磨共煅烧的方法分别制备了具有可见光催化活性的改性催化剂N-P25,S-P25和N,S-P25,利用扫描电镜和紫外-可见吸收光谱对改性光催化剂的性质进行了表征,同时考察了改性光催化剂在可见光下对酸性红B的降解性能。结果表明,N-P25,S-P25和N,S-P25改性光催化剂的光响应波长范围扩大,在紫外光区及可见光区均产生较强吸收;煅烧温度700℃,煅烧时间2.0h制得的N,S-P25催化活性最高,且在可见光条件下对酸性红B的降解符合表观一级反应动力学。研究证明,改性P25催化剂提高了P25在可见光条件下降解酸性红B的光催化性能,丰富了可见光催化降解染料废水的研究思路。
Bibliography:13-1225/TS
In order to improve the photocatalytic properties of P25, using urea, thiourea and methionine as modifiers, the modified catalysts N-P25, S-P25 and N,S-P25 with visible light catalytic activity are prepared by grinding-calcination method, respectively. The properties of modified photocatalysts are characterized by scanning electron microscopy （SEM） and UV-Vis absorption spectroscopy, and the degradation property of acid red B in visible light by the modified photocatalysts is investigated. The results show that the wavelength ranges of light response of the N-P25, S-P25 and N,S-P25 modified photocatalysts expands, intensive absorption appears in both ultraviolet and visible light regions; the N,S-P25 prepared under the condition of calcination temperature of 700 ℃ and calcination time of 20 h has the highest catalytic activity on the degradation of acid red B, and the degradation reaction of acid red B in visible light conforms to the apparent first order reaction kinetics. The study proves that th
ISSN:1008-1542
DOI:10.7535/hbkd.2017yx01014