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| 壳聚糖/纳米CdS复合颗粒可见光光催化降解猩红B动力学研究 | |
| 引用本文： | 蒋茹,朱华跃,管玉江,李晓东,肖玲.壳聚糖/纳米CdS复合颗粒可见光光催化降解猩红B动力学研究[J].环境污染与防治,2009,31(5). |
| 作者姓名： | 蒋茹 朱华跃 管玉江 李晓东 肖玲 |
| 作者单位： | 1. 台州学院环境工程系,浙江,台州,317000;湖南大学环境科学与工程学院,湖南,长沙,410082 2. 台州学院环境工程系,浙江,台州,317000;武汉大学环境科学系,湖北,武汉,430072 3. 台州学院环境工程系,浙江,台州,317000 4. 湖南大学环境科学与工程学院,湖南,长沙,410082 5. 武汉大学环境科学系,湖北,武汉,430072 |
| 基金项目： | 国家自然科学基金杰出青年科学基金，台州学院博士引进基金 |
| 摘 要： | 采用仿生矿化法制备了壳聚糖/纳米CdS复合颗粒光催化剂,并用于可见光光催化降解猩红B染料模拟废水,研究了猩红B初始浓度、pH、催化剂投加量和催化剂重复使用次数等因素对猩红B光催化降解的影响.X射线衍射(XRD)分析表明,壳聚糖能有效负载CdS纳米微晶.采用Langmuir-Hinshelwood模型描述壳聚糖/纳米CdS复合颗粒可见光光催化降解猩红B反应动力学行为,在猩红B初始质量浓度较低(≤20 mg/L)时,光催化降解过程符合假一级动力学方程.降低猩红B初始浓度和溶液pH都可显著增大光催化降解速率常数;催化剂投加量小于0.7 g/L时,光催化降解速率随其增加而增大,但催化剂投加量过大会使光催化降解速率减小;催化剂重复使用第5次时,猩红B光催化降解速率常数仍为第1次使用时的63.4%. |
| 关 键 词： | 光催化 纳米CdS 壳聚糖 猩红B染料 反应因素 反应动力学 |
Photocatalytic degradation kinetics of Biebrich Red by chitosan/nano-CdS composite particle |
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| Jiang Ru,Zhu Huayue,Guan Yujiang,Li Xiaodong,Xiao Ling.Photocatalytic degradation kinetics of Biebrich Red by chitosan/nano-CdS composite particle[J].Environmental Pollution & Control,2009,31(5). | |
| Authors: | Jiang Ru Zhu Huayue Guan Yujiang Li Xiaodong Xiao Ling |
| Institution: | 1.Department of Environmental Engineering;Taizhou University;Taizhou Zhejiang 317000;2.College of Environmental Science and Engineering;Hunan University;Changsha Hunan 410082;3.Department of Environmental Science;Wuhan University;Wuhan Hubei 430072 |
| Abstract: | The chitosan/nano CdS composite particles were prepared by simulating bio-mineralization process.XRD spectra of chitosan and chitosan/nano CdS-composite indicated that nano CdS was well loaded onto chitosan during simulating bio-mineralization process.Series of photocatalytic treatments were performed on Biebrich red(BR) solution under simulated sunlight illumination to detect the effects of initial BR concentration,initial pH,catalyst dose,reusability of catalyst on BR decolorization rate.The result showed... |
| Keywords: | photocatalysis nano-CdS chitosan Biebrich Red dye reaction factors reaction kinetics |
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