Preparation of Fe3+-Ag/TiO2 Nano-particles and Its Photocatalytic Degradation to Formaldehyde
1.Introduction Formaldehyde is the main volatility polluting gas caused by modem fitment. Traditionally, reagents (such as carbamide, melamine) used in the degradation to formaldehyde are inclined to generate pollution circulation. Titania is a very versatile material with attractive applications in environment protecting, in paintings, in the production of electrochemistry electrodes, capacitors, solar cells, catalysis and photo catalysis1. Comparing to normal photo catalysts, its excellent photo-chemical stability, low cost and non-toxicity can be cited. However, its wide band-gap energy (ca. 3.0 eV for futile and 3.2 eV for anatase) means that only 5％ of solar spectrum is used. Moreover, TiO2 presents a relatively high electron-hole recombination rate which is detrimental to its photo activity. In this sense, doping with metals or metal ions could make a double effect. Firstly, it could reduce the band gap energy, thus shifting the absorption band to the visible region. Secondly, metals could provoke a decrease in electron-hole recombination rate, acting as electron traps.
TiO2 nanoparticles Formaldehyde Photo catalytic degradation Sol-gel method
Bo-Yun Wang Rong-Min Wang Yu-Feng He Wei-Hua Lv Hui-fang Zhang Jun-Feng Guo
Key Laboratory of Polymer Materials of Gansu Province,Institute of Polymer,Northwest Normal University,Lanzhou 730070
国际会议
江苏镇江
英文
283-284
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）