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在无额外的添加剂和保护剂的情况下,以柠檬酸钠还原氯金酸制得链状金纳米粒子,使用扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察样品.层层自组装技术可将金纳米粒子自组装,并分别以L-甲硫氨酸(L-Methionine,L-Met)、硫脲(Thiourea,TU)、丙烯基硫脲(Allyl thiourea,ATU)和聚乙烯吡咯烷酮(Polyvinylpyrrolidone,PVP)交联剂自组装于玻碳基底,即得金纳米粒子修饰电极.以[Fe(CN)6]3-/4-氧化还原电对为探针,考察该修饰电极的电化学性质.Au/L-Met/GC电极有最佳电化学性能,循环伏安曲线和计时电流曲线测试表明,Au/L-Met/GC电极的H2O2电催化氧化有较高的灵敏度,线性范围2×10-7~3×10-3mol·L-1,检出限6.67×10-8mol·L-1.
In the absence of additional additives and preservatives, chlorauric acid was reduced with sodium citrate to prepare chain gold nanoparticles, and the samples were observed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) The gold nanoparticles can be self-assembled and can be assembled with L-methionine (L-Met), Thiourea (TU), allyl thiourea (ATU) and polyvinylpyrrolidone Polyvinylpyrrolidone (PVP) crosslinker was self-assembled on a glassy carbon substrate to obtain a gold nanoparticle modified electrode. [Fe (CN) 6] 3- / 4-redox couple was used as a probe to investigate the electrochemical The results of cyclic voltammetry and chronoamperometry showed that Au / L-Met / GC electrode possessed high sensitivity for electrocatalytic oxidation of H2O2 with a linear range of 2 × 10-7 ~ 3 × 10-3mol·L-1, the detection limit of 6.67 × 10-8mol·L-1.