纳米金自组装电极对甲醛的电催化氧化  

Gold Nanoparticles Self-assembled Electrode Electro-catalytic Oxidation of Formaldehyde

作　　者：王淑敏[1] 王作辉[1] 

机构地区：[1]鹤壁职业技术学院,河南鹤壁458030

出　　处：《广州化工》2013年第10期135-137,共3页GuangZhou Chemical Industry

摘　　要：在玻碳电极上共价键合一层4-氨基苯甲酸,构建负电荷界面,然后通过静电作用沉积一层阳离子电子媒介体亚甲基蓝(MB),再通过金-硫、金-氮共价键合作用和静电吸附作用自组装一层纳米金(nano-Au),由此制备了纳米金/亚甲基蓝/4-氨基苯甲酸修饰电极(nano-Au/MB/4-ABA/GC)。在碱性介质中,该电极对甲醛有较好的催化氧化作用,使甲醛在+0.13 V和+0.28 V处出现两个氧化峰,可以根据+0.13 V处的氧化峰测定甲醛的含量,该法测定甲醛的线性范围为10～125 mg/L,检出限0.5 mg/L。Covalent bonding layer 4 -amino acid building a negative charge interface, and then deposited by electrostatic interaction layer of cationic electron mediator methylene blue （ MB）, and then by gold - sulfur, gold - nitrogen covalent key on a glassy carbon electrodecooperation and electrostatic adsorption of self - assembled layer of gold nanoparticles （nano- Au） thus gold nanoparticles/methylene blue/4 -amino benzoic acid modified electrode （nano- Au/MB/4 -ABA/GC） were prepared. In alkaline medium, the electrode formaldehyded a good catalytic oxidation, formaldehyde two oxidation peaks at ＋ 0. 13 V and ＋ 0. 28 V at the determination of the content of formaldehyde oxidation peak at ＋0. 13 V. When the determination limit of formaldehyde was 10 -125 mg/L, the detection limit of 0.5 mg/L.

关 键 词：亚甲基蓝 纳米金 自组装 甲醛 

分 类 号：O656[理学—分析化学]