pH对水热合成法制备铬渣源复合薄膜性能的影响  

Influence of pH Value on the Performance of Composite Films Prepared from Chromium Residue by Hydrothermal Method

作　　者：孙彤[1,2] 刘连利 徐姝颖[1,2] 彭晓琳[1,2] 杨海龙[1,2] 

机构地区：[1]渤海大学化学化工与食品安全学院 [2]辽宁省应用化学重点实验室 [3]辽宁省硅材料工程技术研究中心,锦州121013

出　　处：《无机材料学报》2013年第4期387-392,共6页Journal of Inorganic Materials

基　　金：辽宁省教育厅省级工程技术研究中心建设计划(2009402007)~~

摘　　要：以铬渣为基本原料,采用水热合成法制备了复合薄膜,对样品进行了SEM、ICP、XRD、FT-IR及薄膜厚度表征分析,以薄膜的折射率和反射率为对比参数,研究了水热反应初始pH对薄膜的影响。研究结果表明,当水热反应初始pH达11以上时,薄膜表面呈现完美的空间三维立体网状结构;当水热反应的pH为9、10时,样品中形成了Al2O3、Fe2O3、Fe(OH)3、Cr2O3、AlO(OH)和MgO晶体,且其衍射峰较强;样品内部纳米颗粒间存在毛细孔水和表面吸附水,水热体系内的碱性基团促进膜物质与基底间形成化学键力的结合。薄膜越厚,其折射率越小,水热反应pH为11时,薄膜最薄,折射率最大;水热反应的初始pH为12时制备的薄膜对紫外光反射率低于玻璃基底,水热反应的初始pH为11时制备的薄膜对可见光的反射率小于玻璃基底。With chromium residue as main raw materials,the composite films were prepared by hydrothermal method.The samples were characterized by SEM,ICP,XRD,FT-IR and film thickness,and the influences of hydrothermal pH value on the performance of composite films were investigated using the films’ refractive index and reflectivity as evaluation indexes.The results show that the perfect three dimension networks are appeared on the film surface when pH value is above 11.At pH value of 9 or 10,Al2O3,Fe2O3,Fe（OH）3,Cr2O3,AlO（OH） and MgO crystals are formed in the sample,and the diffraction peak of them is strong.There are pores and surface absorbed water between internal nanoparticles in the samples.In the process of hydrothermal synthesis,the formation of chemical bonds force between the membrane material and basement are facilitated by the alkaline groups.Meanwhile,the thicker film is the smaller the refractive index of the film will be.At pH value of 11,the film is the thinnest and the refractive index is the biggest.At the initial pH value of 12,the refractive index of the film to ultraviolet light is weaker than glass substrate,and at the initial pH value of 11,the refractive index of the film to visible light is weaker than that of glass substrate.

关 键 词：铬渣 综合利用 水热合成 复合薄膜 

分 类 号：O484.41[理学—固体物理]