Amino-Containing Ultrafine Organosilica-Nanoparticle-Modified Au Electrode for the Determination of Cu(II) Ions

作者：Wu, Zhongwei; Liao, Jinjin; Xiao, Jianlin; Liu, Jianyun^*; Yang, Jianmao; Zhou, Xin; Xin, Meng

来源：Electroanalysis, 2013, 25(11): 2557-2566.

DOI：10.1002/elan.201300355

• Copper
• Amino-containing organosilica
• Ultrafine nanoparticle-modified-electrode
• Stripping voltammetry

Using 3-Aminopropyltriethoxysilane(APTES) as a single silica source, an amino-rich ultrafine organosilica-nanoparticle-modified Au electrode was fabricated, following the formation of (3-mercaptopropyl)-trimethoxysilane (MPTS) monolayer on Au surface (MPTS/Au). With cetyltrimethylammonium bromide as an additive, APTES-based gel particles on the electrode have a narrow particle size distribution of 4-7nm and crystal-like structure. AFM and electrochemical characterization confirmed the successful grafting of APTES nanoparticles on MPTS/Au. The APTES/MPTS/Au electrode is highly sensitive for the detection of copper(II) ions with a detection limit as low as 1.6x10(-12)molL(-1) (S/N>3) by square wave voltammetry. The current is linear to copper(II) concentration between 1.6x10(-12) and 6.25x10(-10)molL(-1).

• 出版日期2013-11
• 单位东华大学