钛酸盐纳米线阵列自清洁薄膜的制备及性能研究

发布时间：2018-03-05 06:06

本文选题：(自清洁薄膜)　切入点：(纳米TiO2薄膜)　出处：《黑龙江大学》2015年硕士论文　论文类型：学位论文

【摘要】：光催化性能和超亲水性能作为自清洁薄膜的重要性能,具有优异的光催化性能的半导体材料TiO2,其内部价带的电子在光照条件下吸收光子跃迁到导带,从而产生了电子-空穴对,电子与空穴的作用分别为还原空气中的氧和将吸附的污染物氧化分解为CO2、H2O等无机小分子,因此可以应用于空气的净化、废水的处理以及自清洁等方面,因此引起了企业以及消费者的关注。针对纯相Ti O2材料在实际应用中存在着光吸收范围仅限在紫外光区的缺点,并且存在着光生载流子容易重新复合的缺陷,因此,论文中采用了溶剂热的方法制备出了二氧化钛与钛酸盐复合体薄膜,在光催化性能以及超亲水性能上有很大的提高,而且解决了上述纯相TiO2材料的缺点,并且由于这个过程的成本低以及没有二次污染的优点,因此有着广阔的应用前景。本论文主要研究内容如下:1.采用简单的溶剂热方法,合成过程是以钛酸四丁酯为钛源,六水合硝酸镍为镍源合成了具有花状结构的NiTiO3-TiO2复合体薄膜,并对其光学性质、光电化学性质以及光催化性能进行了研究。该复合体薄膜是具有超亲水性能的,且对1×10-5 mol/L的次甲基蓝溶液具有很好的降解效率。2.采用溶剂热的方法合成了纳米线阵列形貌的Bi2Ti2O7-TiO2复合体薄膜,合成过程是以钛酸四丁酯为钛源,五水合硝酸铋为铋源,无水乙醇和甘油为溶剂,对其形貌特征及光学性能进行研究,而且对其光电化学性质、光催化性能以及超亲水性能进行了探讨。合成的Bi2Ti2O7-TiO2复合薄膜对1×10-5 mol/L的罗丹明B溶液和5 mg/L的苯酚溶液都具有相当好的降解效果。论文中合成的复合体薄膜光滑透明,致密均匀,无彩虹效应且不开裂,制备过程简单,极易控制,成本低廉且原料组成成分少,并且去除效率高、耗能较少,因此,完全可以作为优异的环境友好型材料。
[Abstract]:Photocatalytic properties and superhydrophilicity are important properties of self-cleaning thin films. Because of their excellent photocatalytic properties, the valence band electrons in the semiconductor material TiO2 absorb photons to the conduction band under the illumination conditions, resulting in electron-hole pairs. The effect of electron and hole is to reduce oxygen in air and decompose the adsorbed pollutants into inorganic molecules such as CO _ 2H _ 2O, so they can be used in air purification, wastewater treatment and self-cleaning, etc. Therefore, it has attracted the attention of enterprises and consumers. In the practical application of pure phase TIO _ 2 materials, the optical absorption range is limited to the ultraviolet region, and the photogenerated carriers are easy to recombine. In this paper, TIO _ 2 / titanate composite films were prepared by solvothermal method. The photocatalytic properties and superhydrophilicity of TIO _ 2 / titanate composite films were greatly improved, and the disadvantages of the pure phase TiO2 materials mentioned above were solved. Because of the advantages of low cost and no secondary pollution, this process has a broad application prospect. The main contents of this thesis are as follows: 1. Using simple solvothermal method, the synthesis process is based on tetrabutyl titanate as titanium source. NiTiO3-TiO2 composite thin films with flower-like structure were synthesized by nickel nitrate hexahydrate. Their optical, photochemical and photocatalytic properties were studied. The Bi2Ti2O7-TiO2 composite film with nanowire array morphology was synthesized by solvothermal method. Tetrabutyl titanate was used as titanium source, bismuth nitrate pentahydrate as bismuth source, and tetrabutyl titanate as titanium source and bismuth nitrate pentahydrate as bismuth source. The morphology and optical properties of anhydrous ethanol and glycerol were studied, and their photochemical properties were also studied. The photocatalytic properties and superhydrophilicity of Bi2Ti2O7-TiO2 composite films were investigated. The synthesized Bi2Ti2O7-TiO2 composite films have good degradation effects on Rhodamine B solution of 1 脳 10 ~ (-5) mol/L and phenol solution of 5 mg/L. The synthesized composite films are smooth, transparent and uniform. No rainbow effect and no cracking, the preparation process is simple, easy to control, low cost, low composition of raw materials, high removal efficiency, less energy consumption, so it can be used as an excellent environment-friendly material.
【学位授予单位】：黑龙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.2

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