摘要
该文水解合成并通过煅烧改变晶型,获得了金红石和锐钛矿两种晶型混合的二氧化钛纳米粒子。利用紫外可见分光光度法(UV-Vis)、激光粒度分析(LPSA)、X射线多晶衍射分析(XRD)和冷场发射扫描电镜(SEM)等方法对样品进行了表征。制备了以氧化铟锡(ITO)玻璃为基底的纳米TiO2修饰电极,并研究了晶型对鲁米诺电化学发光(ECL)的增敏作用的影响。结果表明,当粒径较小,经650℃煅烧处理形成混晶时,纳米TiO/ITO修饰电极对鲁米诺电化学发光的增敏效果最明显,为裸电极的7.5倍。
Nano-TiO2（Titania） was synthesized by hydrolytic reaction.The crystal phase of nano-TiO2 was transformed by calcination at different temperatures to obtain the mixed crystal of anatase and rutile.The methods such as UV-Vis spectrometry,laser particle size analysis（LPSA）,X-ray diffraction analysis（XRD） and scanning electron microscopy（SEM） were applied to characterize the properties of nano-TiO2.The nano-TiO2 modified ITO（indium tin oxide） electrode（TiO2/ITO electrode） was prepared by immobilization of nano-TiO2 on ITO glass with nafion as the carrier.The nafion provided a well dispersion matrix on surface of ITO glass.The nano-TiO2 particles would be inset into the hydrophilic caves of nafion to form a symmetric deposition by diffusion.Then the modified electrode was calcined to transform the crystal phase,sintering the nano-particles and eliminate the nafion.The sensitization of this modified electrode for electrochemiluminescence（ECL） of luminol was studied.The results indicated that,under the best condition to calcine the TiO2/ITO electrode at temperature of 650 ℃,the nano-crystal contained 43.6% of anatase,it shown the highest efficiency.The ECL intensity of luminol was enhanced by 7.5 times on this electrode compared with that of the bare ITO glass.
出处
《分析测试学报》
CAS
CSCD
北大核心
2010年第6期544-547,共4页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(20675055)
江苏省自然科学基金资助项目(BK2009111)
苏州市科技项目资助(SYJG0901)
