基于微纳泡沫金属材料的D-半乳糖传感器研究

研究了一种基于微纳泡沫镍材料的D-半乳糖定量传感器，采用泡沫镍材料作为工作电极，Pt作对电极，Ag/AgCl（饱和KCl溶液）电极作为参比电极构建三电极检测体系，采用循环伏安法（CV）和电流-时间曲线法（i-t）检测具有浓度梯度的D-半乳糖溶液。CV扫描结果表明了D-半乳糖在泡沫镍材料上发生氧化-还原反应，i-t检测结果表明在线性范围0.25 mmol/L~5.00 mmol/L内该传感器检测D-半乳糖的灵敏度为6.73×10-2 mA/（cm2·（mmol/L）），检测限为17.7μmol/L（S/N=3）。结果证明所构建的检测方法不但可以实现D-半乳糖的定量分析，并且具有较好的灵敏度和较低的检测限。对比实验结果表明该传感器具有响应速度快、成本低廉等优势，有望在糖类物质快速定量检测领域得到应用。

Study of D-galactose sensor by using micro-nano metal foam material

A quantitative D-galactose sensor by using micro-nano nickel foam material was proposed. Ni foam mate?rial as the working electrode,Pt electrode against a saturated Ag/AgCl(saturated KCl solution)electrode as the refer?ence electrode constructed three-electrode detection system. Cyclic voltammetry(CV)and current-time(i-t)curve methods were used to detect a concentration gradient of D-galactose solution. CV scanning results demonstrated that oxidation-reduction procedure of D-galactose molecules occurs on the nickle foam material. I-t scanning results indi?cated that the proposed sensor presented the sensitivity of 6.73×10-2 mA/(cm2·mM)and detecting limit of 17.7μM (S/N=3)in linear range between 0.25 mM and 5.00 mM. The proposed sensor not only presented quantitative analy?sis ability for D-galactose,but also had good sensitivity and low detecting limit. Control experimental results showed that this sensor had some advantages including rapid analysis,low cost,etc. It is expected to carbohydrate rapid quantitative detection of application fields.