摘要
采用电化学电位阶跃技术(CA),在GC基底上制备出Fe3O4纳米粒子电催化剂;通过SEM和TEM对其表面形貌进行表征。结果表明,所制备的Fe3O4纳米粒子呈纳米片状结构,且分布较均匀,片的厚度约为10nm。选区电子衍射(SAED)结果显示,片状结构的Fe3O4为多晶结构。所制得的Fe3O4纳米粒子具有类似天然过氧化物酶活性,对H2O2的还原过程具有很好的电催化性能,是很好的电化学传感器。该传感器具有较好的电化学灵敏度,最低检测限为5×10-5mol·L-1(S/N=3),线性范围为4×10-4～7×10-2mol·L-1。
The nanostructured Fe3O4 was electrodeposited on glassy carbon(GC)electrode by chronoamperometry(CA)in alkaline solutions .The prepared nanostructured Fe3O4 was characterized by scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The results showed that the nanocrystal Fe3O4was composed of nanosheets,and the thickness of nanosheets was about 10 nm.The selected area electron diffraction(SAED)patterns displayed the polycrystal Fe3O4.The prepared Fe3O4 possess enzyme mimetic activity which is similar to that of natural peroxidase.Therefore,an electrochemical sensor with the nanosheets Fe3O4 were fabricated to detect the reduction of H2O2.The sensor exhibited excellent electrochemical sensitivity with a detection limit 5×10-5 mol·L-1(S/N=3)and the linear range was 4×10-4—7×10-2 mol·L-1.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2010年第S1期16-19,共4页
CIESC Journal
基金
国家自然科学基金项目(20873113
20921120405)
浙江省重中之重学科开放基金项目(20090503)
关键词
电沉积
纳米片
电化学传感器
过氧化氢
electrodeposition
nanosheets
electrochemical sensor
hydrogen peroxide
