竹炭-ZnO复合材料的制备及对苯酚的光催化降解作用  

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

作　　者：张丽敏[1] 陈清松[1] 李晓燕[1] 丁富传[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《林产化学与工业》2009年第1期33-38,共6页Chemistry and Industry of Forest Products

基　　金：福建省科技计划重点项目(2006N0037);福建省发展和改革委员会项目(闽发改投资[2005]847号)

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。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 chareoal-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 50 mg/L, composite mass concentration 2 g/L and H2O2 concentration 1.95 mmol/L, reaction time 4 h 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 %.

关 键 词：竹炭-ZnO复合材料 光催化降解 苯酚 

分 类 号：TQ424.19[化学工程] TQ621.3