Photoelectrocatalytic degradation of aqueous ammonia using TiO2 by Anodization and Immobilization

• Main Authors: Chia-Hao Chang, 張家豪
• Other Authors: Chao-Lang Kao
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/83333495986898911317

碩士 === 國立勤益科技大學 === 化工與材料工程系 === 103 === In this study, two different substrates (titanium sheet, titanium mesh) were prepared by using anodic oxidation and immobilization. On the other hand, discussion two substrates (titanium sheet, titanium mesh) were prepared by using anodic oxidation and immobilization with different pH values, ammonia removal efficiency of the bias potential. The results show that the prepared by using immobilization(Catalyst amount is 0.413g) at pH values 7.5 and bias potential is 2.0V have the best efficiency of 70.13%, when the pH is higher than the titanium dioxide pHpzc, NH4+ easier to adsorbed on the surface of titanium dioxide, so the reaction faster. At pH values 7.5 and bias potential is 1.5V has efficiency of 68.1% Considering the energy conservation issues and efficiency not differ much, therefore, as a condition of bias potential of 1.5V. Titanium mesh was prepared by using anodic oxidation and immobilization degradation solution of ammonia + anion and cation ions in different concentrations,observed any change and the impact of the target pollutant degradation effect. the results show that titanium mesh was prepared by using a immobilization degradation solution of ammonia + 1.5M phosphoric acid have the best efficiency of 81.90%.