引用本文:王赫，杨弋涛，曾志翔，王刚，乌学东，薛群基.纤维素/ZnO复合膜的制备及其光催化性能[J].中国表面工程,2015,28(5):30~36
WANG He, YANG Yitao, ZENG Zhixiang, WANG Gang, WU Xuedong, XUE Qunji.Facile Synthesis of Cellulose/ZnO Composite Film and Its Photocatalytic Activity[J].China Surface Engineering,2015,28(5):30~36
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纤维素/ZnO复合膜的制备及其光催化性能
王赫，杨弋涛，曾志翔，王刚，乌学东，薛群基1,2
1. 上海大学 材料科学与工程学院;2. 中国科学院宁波材料技术与工程研究所 a. 中国科学院海洋新材料与应用技术重点实验室， b. 浙江省海洋材料与防护技术重点实验室
摘要:
为克服纳米粉体光催化剂易团聚、难回收和容易引起二次污染等缺点，采用“一步”水热法在纤维素膜表面原位生长多孔球形微纳米ZnO颗粒。利用扫描电子显微镜（SEM）、能谱仪（EDS）和X射线衍射仪（XRD）和热重分析仪（TG）分析了纤维素/ZnO复合膜的微观形貌、组成、晶体结构、热稳定性以及ZnO的负载量；采用紫外可见分光光度计根据亚甲基蓝溶液的降解测试其光催化活性。结果表明：该方法可成功实现纤维素膜对ZnO颗粒的负载，且当加热时间为12 h时，负载的ZnO颗粒数量多分布均匀，且为多孔球状并呈典型的纤锌矿结构。在紫外光照射下，纤维素/ZnO复合膜具有优越的光催化性能，可用于降解染料等有机物；当ZnO负载量为6 mg时，3 h内亚甲基蓝的催化效率为90%。
关键词:  “一步”水热法  纤维素  光催化  负载型光催化剂
DOI：10.11933/j.issn.1007-9289.2015.05.005
分类号:
基金项目:
Facile Synthesis of Cellulose/ZnO Composite Film and Its Photocatalytic Activity
WANG He, YANG Yitao, ZENG Zhixiang, WANG Gang, WU Xuedong, XUE Qunji1,2
1. School of Materials Science and Engineering, Shanghai University,;2a. Key Laboratory of Marine Materials and Related Technologies, 2b. Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
Abstract:
In order to overcome the aggregation and overlap of nanopowder photocatalysts, the cellulose /ZnO composite films with porous spherical ZnO crystals immobilized in cellulose matrix were prepared by an insitu hydrothermal method. The morphologies, composition and crystal structure of the prepared composite films were characterized by scanning electron microscopy (SEM), energy dispersive spectrum analysis (EDS) and Xray diffraction (XRD). The thermostability of the composite films and content of ZnO particles were calculated by thermogravimetric analysis (TG). The photocatalytic activities were evaluated by degrading methylene blue and determined by UVvis spectrophotometer. The results show that the composite films are successfully prepared by this method with ZnO particles distributing uniformly on their surface when heated for 12 h. These ZnO particles are porous spherical and presented typically hexagonal wurtzite structure. Under UV light irradiation, the prepared cellulose/ZnO composite films exhibit excellent photocatalytic activity; the photocatalytic efficiency within 3 h can reach 90% with the amount of ZnO less than 6 mg.
Key words:  one-step hydrothermal method  cellulose  photocatalysis  supported photocatalysts
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