【作者】 罗志宏； 白升鑫； 张合； 钟清枝； 林鸿明；

【Author】 Chin-Hung Lo, Sheng-Hsin Pai, Ho Chang, Tsing-Tshih Tsung, Hong-Ming Lin( Department of Mechanical Engineering, Taipei University of Technology, Taipei 106, China; Department of Materials Engineering, Tatung University, Taipei 104, China)

【机构】 台北科技大学机械工程系； 大同大学材料工程系；

【摘要】 本文以新式的奈米微粒制备方法-超音波辅助真空潜弧制程制备奈米二氧化钛悬浮液,针对该制程之制程参数,如电流、放电幅、崩溃电压与超音波振幅,搭配稳健性设计法进行研究,以期利用最少的实验来获得最佳之二氧化钛奈米悬浮微粒制备条件.经由实验结果得知,以超音波辅助真空潜弧制程可获得分布小且均匀的二氧化钛奈米悬浮微粒在表面电位方面,所制备之悬浮液之零点电位值约为pH5,藉由悬浮液pH值的改变,越远离零点电位值之悬浮液呈现较好之分散性,越接近则产生凝聚现象.在光催化方面,所制备之奈米二氧化钛悬浮液在光波长360-380 nm时产生吸收紫外光现象,藉由穿透率与吸收波长的计算可获得制备之二氧化钛微粒能带间隙为3.4 eV.更多还原

【Abstract】 An innovative nano-particle preparing method, Ultrasonic-aided Submerged Arc Nano-particle Synthesis System was used in this study. The major parameters are combined with robust design method in order to use least experiments to investigate optimized parameters for producing TiO2 nano-particle suspension. The pH value of isoelectric point of the produced particle suspension is 5. It will be dispersed when the potential value of the suspension is distant from ISP or it will be aggregated when the potential value is near ISP. In aspect of UV/Vis absorbency, the produced TiO2 nano-particle suspension absorbes UV when the wavelength is 360-380 nm. After a sum of transmittance and wavelength, the band gap energy is 3.4 eV.更多还原