普鲁士蓝/CdS纳米复合物电致化学发光及其H_2O_2传感应用(英文)  

Prussian Blue/CdS Nanocomposite:Enhanced Electrochemiluminescence and Application in H_2O_2 Sensing

作　　者：史传国[1,2] 徐静娟[1] 陈洪渊[1] 

机构地区：[1]南京大学生命分析化学国家重点实验室,南京210093 [2]南通大学化学化工学院,南通226019

出　　处：《无机化学学报》2011年第10期2005-2012,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20890021);国家973计划(No.2007CB936404)资助项目

摘　　要：通过一定体积比的CdS和普鲁士蓝(PB)胶体纳米溶液的简单混合,制备了PB/CdS纳米复合物。在共反应剂存在条件下,PB纳米粒子含量较低时,在ITO电极上CdS纳晶的电致化学发光(ECL)强度可以增强3倍左右。PB纳米粒子含量较高时,CdS纳晶的ECL强度则显著降低。详细讨论了PB纳米粒子对CdS纳晶ECL影响的机理。PB纳米粒子对CdS纳晶的ECL增强可用于H2O2传感。该传感器对H2O2响应的线性范围为3.3×10-8～6.5×10-3 mol.L-1(R=0.999 2),检测限为12 nmol.L-1(S/N=3),传感器具有良好的稳定性和重现性。Prussian blue（PB）/CdS nanocomposites were prepared under simple ultrasonication mixing of the two separated colloidal solutions at a desired volume ratio.At low amount of PB nanoparticles（NPs）,the maximum enhancement factor of about 3-fold in electrochemiluminescence（ECL） intensity of CdS nanocrystals（NCs） was obtained at the indium tin oxide（ITO） electrode in the presence of co-reactant.On the contrary,at high amount PB NPs,the ECL intensity was reduced significantly.The influences of PB NPs to CdS NCs are discussed in detail.The application of the enhanced ECL from the nanocomposite was studied for the H2O2 sensing.The resulting ECL sensor shows a linear response to the concentration of H2O2 ranging from 3.3×10-8 to 6.5×10-5 mol·L-1（R=0.9992） with a detection limit of 12 nmol·L-1（S/N=3） and good stability and reproducibility.

关 键 词：普鲁士蓝 CdS纳晶 电致化学发光 H2O2 

分 类 号：O657.1[理学—分析化学]