Preparation of Magnetically Recyclable Titanium Dioxide Spheres for Photodegradation of Methylene Blue Dye

• Main Authors: Kuo-Ming Kuo, 郭國明
• Other Authors: Li-Heng Kao
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/upp3hm

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系碩士在職專班 === 106 === In this study, titanium dioxide porous spheres are prepared by using sodium alginate, tetrabutyl titanate (Ti(OBu)4), commercially available AEROXIDE® TiO2 P25, and zinc nitrate hexahydrate (Zn (NO3)2.6H2O) via the template method. In order to consider the cost and environmental protection issues, magnet powder is added in the process to make the magnetically recyclable TiO2 spheres for convenient recycling purposes. In addition to the commercially available product (AEROXIDE® TiO2 P25), the commercially available product (AEROXIDE® TiO2 P25) can be changed from a powder to a porous sphere, and it is easy to magnetically recycle, making it more commercially viable. The properties of the spheres were analyzed using thermogravimetric analysis (TGA), Nitrogen desorption Analyzer (BET), X Ray diffraction (XRD), Scanning electron microscope (SEM), ultraviolet-Visible absorption spectrometer (UV-VIS). The photodegradation experiments were carried out degraded 10 ppm methylene blue (MB) under visible light irradiation, and the photodegradation efficiency was judged by measuring the absorption value of methylene blue at 664 nm using a spectrophotometer. The results of the experiment showed that the magnetically recycle porous titanium dioxide spheres prepared in this experiment were crystalline structure of anatase phase. In the photodegradation methylene blue experiment, the degradation rate of the titanium dioxide spheres with a P25 addition of 1.0 g can reach 98% at 180 min. The degradation rate has the best effect of photodegradation in this experiment.