竹炭-ZnO复合材料的制备及对苯酚的光催化降解作用

林产化学与工业 ›› 2009, Vol. 29 ›› Issue (1): 33-38.

竹炭-ZnO复合材料的制备及对苯酚的光催化降解作用

张丽敏, 陈清松, 李晓燕, 丁富传

福建师范大学化学与材料学院, 福建福州 350007

收稿日期:2008-04-30 修回日期:1900-01-01 出版日期:2009-02-28 发布日期:2009-02-28
通讯作者: 陈清松,硕士生导师,主要从事植物材料化学及利用的研究;E-mail:chenqsong@tom.com。

Preparation of Bamboo Charcoal-ZnO Composite and Its Effect on Photocatalytic Degradation of Phenol

ZHANG Li-min, CHEN Qing-song, LI Xiao-yan, DING Fu-chuan

College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China

Received:2008-04-30 Revised:1900-01-01 Online:2009-02-28 Published:2009-02-28

摘要/Abstract

摘要： 以硅酸钠为粘结剂用浸涂法制备了竹炭-ZnO复合材料,用FT-IR、电镜扫描(SEM)对其进行结构表征和形貌观察,研究了该复合材料对溶液中苯酚光催化降解去除效果。结果表明:制备竹炭-ZnO复合材料的最佳配比为m(竹炭):m(ZnO):m(Na₂SiO₃·9H₂O) 为5:2:1;酸性条件下,竹炭-ZnO复合材料对苯酚的去除效果更好,H₂O₂对苯酚溶液光催化降解有促进作用。当苯酚溶液的质量浓度为50mg/L时,复合材料最佳用量为2g/L,溶液中H₂O₂最佳的添加量为1.95mmol/L,在紫外灯和太阳光下催化降解4h,苯酚去除率分别达到92.3%和76.4%。复合材料重复使用3次,对苯酚的去除率仍可以达到80%以上。

关键词: 竹炭-ZnO复合材料, 光催化降解, 苯酚

Abstract: Bamboo charcoal-ZnO composite was prepared via dipping method by using sodium silicate as binder. The bamboo charcoal-ZnO composite was characterized by FT-IR and scanning electron microscopy (SEM), and the removal effects of the composite for photocatalytic degradation of phenol in aqueous solution were investigated. The experimental results showed that in the preparing process of composite the optimum mass ratio of bamboo charcoal-ZnO-Na₂SiO₃·9H₂O was 5:2:1. It was favorable to the removal of phenol in acidic aqueous solution and when H₂O₂ was added. Under optimum condition of phenol concentration 50mg/L, composite mass concentration 2g/L and H₂O₂ concentration 1.95mmol/L, reaction time 4h under UV and sunlight irradiations respectively, the phenol removal rates were 92.3% and 76.4%, respectively. The phenol removal rate of the composite after reused for three times could still reach more than 80%.

Key words: bamboo charcoal-ZnO composite, photocatalytic degradation, phenol

中图分类号:

张丽敏;陈清松;李晓燕;丁富传. 竹炭-ZnO复合材料的制备及对苯酚的光催化降解作用[J]. 林产化学与工业, 2009, 29(1): 33-38.

ZHANG Li-min;CHEN Qing-song;LI Xiao-yan;DING Fu-chuan. Preparation of Bamboo Charcoal-ZnO Composite and Its Effect on Photocatalytic Degradation of Phenol[J]. , 2009, 29(1): 33-38.

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