光接枝丙烯酸棉纤维素基TiO_2/C光催化剂的制备与光催化性  

Preparation and photocatalysis of acrylic acid grafted cotton cellulose-based TiO_2/C photocatalyst

作　　者：吉强 王晓 戚俊然 崔永珠 吕丽华 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《纺织学报》2017年第10期75-80,共6页Journal of Textile Research

基　　金：辽宁省自然科学基金指导计划项目(20170540067);大连市青年科技之星支持计划项目(2015R082)

摘　　要：针对回收利用废弃棉织物的功能和附加值低的问题,采用光接枝丙烯酸的废弃棉纤维素为模板,钛酸四丁酯为前驱体,无水乙醇为溶剂,经磷酸二氢铵处理后,通过表面溶胶-凝胶法和火焰燃烧的方法制备具有纤维形貌的锐钛矿型二氧化钛和炭(TiO_2/C)的复合光催化材料。分别研究了丙烯酸接枝改性、磷酸二氢铵处理对TiO_2/C光催化性能的影响。采用扫描电子显微镜、X射线衍射和热重分析对TiO_2/C光催化材料的表面形貌和晶体结构以及质量损失率进行分析。结果表明,质量分数为30%的丙烯酸光接枝改性棉织物,经质量分数为15%的磷酸二氢铵溶液浸渍处理,用钛酸丁酯溶液抽滤沉积10次,在空气中燃烧2 h制得的TiO_2/C光催化剂具有较为优异的光催化性能。此时的光催化剂中锐钛矿型二氧的粒度相对较小,分布较均匀,更有利于光催化降解。In view of the problems of low added value and functionalization of recycled waste cotton fabric,anatase Ti O2/C composite catalyst in the fiber form was prepared from waste cotton cellulose grafted with acrylic acid as a template,tetrabutyl titanate as a precursor and anhydrous ethanol as a solvent by treating with ammonium hydrogen phosphate and performing surface sol-gel process and flame burning. The influences of acrylic acid grafting modification and ammonium hydrogen phosphate treatment on the photocatalytic performance of the Ti O2/C photocatalyst were discussed. The surface morphology,crystalline structure and thermal loss were analyzed using scanning electron microscopy,X-ray diffraction and thermogravimetric analysis. The results show that the cotton cellulose based Ti O2/C photocatalyst exhibits better photocatalytic performance,which was prepared by grafting with 30% acrylic acid,soaking in 15% NH4 H2 PO4 solution for 20 min,vacuum filtering and depositing with tetrabutyl titanate for10 times,and burning in air for 2 h. Relatively small size and well-distributed anatase Ti O2 is responsible for better photocatalytic performance.

关 键 词：废弃棉织物 丙烯酸 棉纤维素 光催化剂 磷酸二氢铵 

分 类 号：TS102.9[轻工技术与工程—纺织工程] TB34[轻工技术与工程—纺织科学与工程]