CAJ | 학술논문

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3.3×104～6.5×10-3 mo1.L-1(R=0.9992),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.
통과일정체적비적CdS화보로사람(PB)효체납미용액적간단혼합,제비료PB/CdS납미복합물.재공반응제존재조건하,PB납미입자함량교저시,재ITO전겁상CdS납정적전치화학발광(ECL)강도가이증강3배좌우.PB납미입자함량교고시,CdS납정적ECL강도칙현저강저.상세토론료PB납미입자대CdS납정ECL영향적궤리.PB납미입자대CdS납정적ECL증강가용우H2O2전감.해전감기대H2O2향응적선성범위위3.3×104～6.5×10-3 mo1.L-1(R=0.9992),검측한위12 nmol·L-1(S/N=3),전감기구유량호적은정성화중현성.
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.