镍-类金刚石复合电极的制备及在无酶葡萄糖传感器中的应用  

Preparation of Ni-Diamond-Like Composite Electrode and Its Application in Non-enzymatic Glucose Sensor

作　　者：王桓 邱兆国 林松盛 许伟 韦春贝 郭朝乾 苏一凡 Wang Huan;Qiu Zhaoguo;Lin Songsheng;Xu Wei;Wei Chunbei;Guo Chaoqian;Su Yifan(South China University of Technology,Guangzhou 510640,China;Institute of New Materials,Guangdong Academy of Sciences,Guangzhou 510651,China)

机构地区：[1]华南理工大学,广东广州510640 [2]广东省科学院新材料研究所,广东广州510651

出　　处：《稀有金属材料与工程》2023年第1期253-260,共8页Rare Metal Materials and Engineering

基　　金：广东特支计划项目(2019BT02C629);广东省基础与应用基础研究基金项目(2019A1515110710);广州市科技计划项目(202007020008)。

摘　　要：采用高功率脉冲磁控溅射技术在纯Ti基体上制备了不同Ni含量的镍-类金刚石(Ni-DLC)复合电极,用于构建无酶葡萄糖传感器。利用X射线衍射仪、原子力显微镜、拉曼光谱仪及电化学工作站等对Ni-DLC复合电极的表面形貌、微观结构以及电化学性能进行表征。结果表明:(1)随着Ni含量的增多,Ni-DLC薄膜表面粒子突起逐渐增加,且团聚的粒子直径也在不断变大,显著增多了薄膜表面的活性位点。Ni-DLC薄膜中sp^(2)键的含量增多,薄膜的有序度增加且导电性得到改善,薄膜中没有形成明显的Ni-C键,Ni主要以单质形式存在。(2)将Ni-DLC复合电极封装成葡萄糖传感器置于葡萄糖溶液中进行测试,结果发现:Ni-DLC复合电极对于葡萄糖有着很好的催化效果,电极反应主要受扩散控制,氧化峰电流密度与葡萄糖浓度有着很好的线性关系,Ni-DLC复合电极对于葡萄糖的检测灵敏度为796μA·(mmol/L)^(-1)·cm^(-2),检测下限LOD=0.5μmol/L,响应时间5 s,对于尿酸及抗坏血酸有很好的抗干扰性能,该电极在构建无酶葡萄糖传感器方面有着广阔的应用前景。Nickel diamond-like(Ni-DLC)composite electrodes with different Ni contents were prepared on pure Ti substrate by high power pulsed magnetron sputtering technology,which was used to construct non-enzymatic glucose sensor.The surface morphology,microstructure and electrochemical performance of Ni-DLC composite electrode were characterized by X-ray diffractometer,atomic force microscope,Raman spectrometer and electrochemical workstation.The results show that:(1)with the increase of Ni content,the particle protrusion on the surface of Ni-DLC film increases gradually,and the diameter of agglomeration particles also increases,which significantly increases the active sites on the surface of Ni-DLC film.The content of sp^(2) bond in Ni-DLC film increases,the order degree of the film increases,and the conductivity of the film is improved.No obvious Ni-C bond is formed in the film,and Ni mainly exists in elemental form.(2)Glucose sensor made of Ni-DLC composite electrode was placed in glucose solution for testing.And the results show that Ni-DLC composite electrode has a good catalytic effect on glucose,electrode reaction is mainly controlled by diffusion,and oxidation peak current density and glucose concentration has a good linear relationship.Ni-DLC composite electrode for glucose detection sensitivity is 796μA·(mmol/L)^(-1)·cm^(-2),the lower limit of detection LOD=0.5μmol/L,and the response time is 5 s.And the electrode has good anti-interference performance for uric acid and ascorbic acid.The electrode has a broad application prospect in the construction of non-enzymatic glucose sensor.

关 键 词：高功率脉冲磁控溅射 Ni-DLC复合电极 无酶葡萄糖传感器 

分 类 号：TB43[一般工业技术]