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材料研究学报  2010, Vol. 24 Issue (5): 540-546    
  研究论文 本期目录 | 过刊浏览 |
细菌纤维素负载稀土掺杂二氧化钛复合膜的制备和光催化性能
张秀菊, 陈文彬, 林志丹, 姚佳
暨南大学理工学院材料系 广州 510632
Preparation and Photocatalysis Performances of Bacterial Cellulose/TiO2 Composite Membranes Doped by Rare Earth Elements
ZHANG Xiuju, CHEN Wenbin, LIN Zhidan, YAO Jia
Preparation and Photocatalysis Performances of Bacterial Cellulose/TiO2 Composite Membranes Doped by Rare Earth Elements
引用本文:

张秀菊 陈文彬 林志丹 姚佳. 细菌纤维素负载稀土掺杂二氧化钛复合膜的制备和光催化性能[J]. 材料研究学报, 2010, 24(5): 540-546.
. Preparation and Photocatalysis Performances of Bacterial Cellulose/TiO2 Composite Membranes Doped by Rare Earth Elements[J]. Chin J Mater Res, 2010, 24(5): 540-546.

全文: PDF(1344 KB)  
摘要: 以细菌纤维素(BC)为载体, 用溶胶-凝胶法原位生成稀土镧和铈元素(La, Ce)掺杂的二氧化钛复合膜, 以甲基橙为目标降解物, 考察了复合膜的光催化活性。结果表明: 稀土元素已引入TiO2/BC复合膜中; 掺杂TiO2的晶型为锐钛矿型; 掺杂稀土的TiO2/BC复合膜的光催化活性比未掺杂的有较大提高;铈掺杂的TiO2/BC复合膜的光催化性能优于镧掺杂的; Ce4+掺杂的最适浓度为2 mmol/L, 而La3+掺杂的最适浓度为5 mmol/L; 稀土掺杂的TiO2/BC复合膜对甲基橙溶液重复降解5次的降解率仍高于70%。
关键词 复合材料  细菌纤维素  稀土 二氧化钛 光催化 甲基橙    
Abstract:The composite membrane of TiO2/BC(bacterial cellulose) doped with rare earth elements was prepared by a sol-gel method using tetraisopropyl titanate as starting materials and BC as the support. Photocatalysis performances of the membrane were estimated by using methyl orange as a degradation agent. The results show that rare earth ions are incorporated into TiO2/BC membrane; the resulting titanium dioxide is anatase type. Compared with a pure TiO2/BC membrane, photocatalysis efficiency of the doped one is significantly enhanced. The degradation rate of methyl orange solution for the composite membrane doped with Ce4+ is higher than that of membrane doped with La3+. The optimal dosage of Ce4+ is 2 mmol/L, while the most suitable concentration of La3+ is 5 mmol/L. The degradation rate of methyl orange solution is above 70% after degradation for five times.
Key wordscomposites    bacterial cellulose    rare earth    titanium dioxide    photocatalysis    methylene orange
收稿日期: 2010-07-07     
ZTFLH: 

O643

 
基金资助:

广东省科技攻关项目2010B080701060和广东省自然科学基金项目8451063201000041资助。

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