Ag^+/TiO_2-ZnO纳米复合薄膜的制备及双亲性能  

Preparation and induced Amphilicity of Ag^+ doped TiO_2-ZnO composite films

作　　者：王青[1,2] 李新丽[1] 乜伟[1,2] 夏咏梅[1,2] 

机构地区：[1]兰州理工大学理学院,兰州730050 [2]甘肃省有色金属新材料国家重点实验室,兰州730050

出　　处：《功能材料与器件学报》2010年第2期125-130,共6页Journal of Functional Materials and Devices

基　　金：甘肃省自然科学基金资助项目(3ZS062-B25-020)

摘　　要：采用溶胶-凝胶法制备了TiO2薄膜、TiO2-ZnO纳米薄膜和Ag+/TiO2-ZnO纳米薄膜。通过X射线衍射和原子力显微镜表征了样品的晶相、晶粒尺寸和形貌。以水(H2O)作为极性溶液参照物、苯(C6H6)作为非极性溶液参照物,研究了掺杂量、煅烧温度、表面处理对薄膜光致双亲性的影响。结果表明:在ZnO/TiO2复合薄膜中,适量掺杂Ag+会提高其双亲性,摩尔比为1%时最佳。煅烧温度的不同能够导致薄膜的晶粒粒径、晶型及薄膜表面的粗糙度发生变化,从而影响薄膜的双亲性能。煅烧温度为550℃、经酸溶液或热处理后Ag+/TiO2-ZnO纳米薄膜的双亲性最佳,其晶粒粒径约为21.1nm。此时,亲水角和亲油角分别为2°和0.5°。Ag+/TiO2-ZnO纳米薄膜的双亲性明显高于纯TiO2和TiO2-ZnO纳米薄膜。TiO2 films , TiO2 -ZnO composite films and Ag＋/TiO2 -ZnO composite films were synthesized by sol - gel process. The crystal phase, size of panicles and surface morphology of the film samples were characterized by X - ray diffraction and atomic force microscopy. The effects of annealing temperature, amount of Ag ＋ and treatment method on hydrophilic - lipophilic property on induced Amphilicity of the TiO2 ,TiO2 -ZnO and Ag＋/TiO2 -ZnO films were investigated using H2O as polarity solution and C6H6 as non - polarity solution. The results indicate that Ag＋ doping appropriately can provide induced Amphilicity, When doped amount of Ag＋ is 1% , the film of Ag＋ ZnO/TiO2 film has the best induced Amphilicity. Annealing temperature affect the size of particles, the composition and roughness of films notably, and then lead to a remarkable change in induced Amphilicity of the films. The films annealed at 550℃, treatment with acid or heat and induced Amphilicity of the Ag＋/TiO2 -ZnO composite films is best. The size of particles is about 21. 1 nm. In this best condition, the contact angle is 2°（0.5°）. Ag＋/TiO2 - ZnO films is the best among pure TiO2 films, TiO2 - ZnO composite films and Ag＋/TiO2 - ZnO composite films.

关 键 词：Ag+掺杂 TiO2-ZnO复合薄膜 溶胶-凝胶 双亲性 

分 类 号：TQ134[化学工程—无机化工]