氧化锌纳米棒光电极对核黄素的光致电化学响应及应用

发布时间：2018-03-29 20:07

本文选题：核黄素　切入点：氧化锌纳米棒　出处：《高等学校化学学报》2016年12期

【摘要】：基于核黄素在第二工作电极上的预还原,将还原型核黄素作为电子给体纳入氧化锌纳米棒光电极的光致电化学反应过程,构建了一种新的光致电化学反应系统.优化了电化学制备氧化锌纳米棒光电极的方法,研究了核黄素与氧化锌纳米棒光电极的光致电化学反应机理,建立了一种测定核黄素的光致电化学分析法.在p H=6.5的缓冲溶液中,以玻碳电极为预还原电极,在峰值波长为365 nm、能量为450μW/cm~2的光照下,在偏压0.1 V处测得的光电流与1.00×10~(-5)~1.00μmol/L核黄素浓度的对数值成正比,检出限为6.0×10~(-7)μmol/L(S/N=3),灵敏度为195.6 n A/lg[c(μmol/L)].对实际样品测定的相对标准偏差小于6.25%,回收率为99.0%~104%,常见生化物质对核黄素光电流的响应无干扰.
[Abstract]:Based on the pre-reduction of riboflavin on the second working electrode, the reduced riboflavin was used as an electron donor in the photochemical reaction of zinc oxide nanorods photoelectrode. A new photochemical reaction system was constructed, and the photochemical reaction mechanism between riboflavin and zinc oxide nanorod photoelectrode was studied by optimizing the electrochemical preparation method of ZnO nanorods photoelectrode. A photochemical method for the determination of riboflavin was established. In the buffer solution of pH 6.5, the glassy carbon electrode was used as the prereduction electrode and the peak wavelength was 365nm and the energy was 450 渭 W/cm~2. The photocurrent measured at the bias voltage of 0.1 V is proportional to the logarithmic value of the concentration of riboflavin at 1.00 脳 10 ~ (-5) 渭 mol/L. The detection limit is 6.0 脳 10 ~ (-1) 渭 mol / L ~ (-1) 渭 mol 路L ~ (-1) S / N ~ (3 +), the sensitivity is 195.6 n A/lg [c (渭 mol / L)]. The relative standard deviation for the actual sample is less than 6.25 and the recovery is 99.0%. There is no interference in the response of common biochemical substances to riboflavin photocurrent.
【作者单位】：生化分析山东省重点实验室青岛科技大学化学与分子工程学院;潍坊工程职业学院应用化学与生物工程学院;
【基金】：国家自然科学基金(批准号:21475072) 肿瘤标志物传感分析教育部重点实验室开放基金(批准号:SATM201503) 电分析化学国家重点实验室开放基金(批准号:SKLEAC201106)资助~~
【分类号】：O657.1

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