化学生物传感
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关于在多空纳米金上修饰其他的 物质并用其作为传感器的汇报
汇报人：李朋 学号：201420120916
prove that the Ni(OH)2/NPGF composed of Ni(OH)2, metal nickel and metal gold
这两个图的对比证明了Ni(OH)2/NPGF 修饰的电极对葡萄糖有催化作用
创新点
• In this work, we aim at fabricating a new advanced nonenzymatic glucose sensor based on nanoporous structure comprising two pairs of electron mediators of Au/Au(OH) and Ni(II)/Ni(III).We are delighted that an ultrasensitive nonenzymatic glucose sensor has been successfully constructed indeed along this line by incorporating a thin layer of Ni(OH)2 coating about 4 nm in thickness into/on a nanoporous gold film (NPGF) for the first time.
原理
结论与创新点
• A non-enzymatic amperometric sensor based a Cucoated three-dimensional nanoporous gold film was facilely fabricated by electrochemical methods at room temperature within 20 min, which was simple, fast, and controllable. Incorporation of a very thin coating layer of Cu into/on the NPGF substantially enhanced the electrocatalytic activity for electrooxidation of glucose. It can beascribed to the porous structure, high real area, and co-mediatingof Cu(III)/Cu(II) and Au/Au(I). The asproposed Cu/NPGF sensordemonstrated attractive performance in sensing glucose with a wide concentration range (2μM–8.11 mM), short responsive time 3s, ultrasensitivity, low detection limit(0.53μM), good reproducibility, anti-toxicity and long-term stability.
创新点与结论
• In summary, the silver nanoparticles-coated gold nanoporous • film electrode has been prepared and used in the amperometric • detection of Cr(VI) successfully. This method offers the following attractive features. Firstly, the presence of Ag nanoparticles acts as individual nanoparticle arrays,which improves the electrical communications of Au nanoporous substቤተ መጻሕፍቲ ባይዱate. The proposed method exhibits the enhanced electrocatalytic activation for Cr(VI) detection • with a synergistic effect of Ag/Au nanocomposites. Secondly, • the AgNGF electrode provides the wider linear range • and lower detection limit for Cr(VI) detection, which is also • free from distinct interference of coexisting other metal ions. • Thirdly, the method shows a very simple preparation and • fabrication of AgGNF electrode with rapidness and low cost. • So it can be estimated that the proposed method is likely to • have impact on further catalysis, sensors and optoelectronics
创新点
• Many spectrophotometric techniques have been employed for the determination of chromium, however, • these procedures do not satisfy requirements for routine • analysis, mainly because of complicated process design, • long time consumption, intensive labor involvement or the high cost of instrumentation .Instead, the electrochemical method is more attractive for Cr(VI) detection owing to its high sensitivity, relative simplicity,inexpensive equipment and portable options
机理
• Ni(II) → Ni(III) + e− • Au → Au(I) + e− • Ni(III) + Glucose → Ni(II) + Glucolactone Au(I) + Glucose → Au + Glucolactone
从上图可以看出在0.1v时，Glu的响应最大，干扰电流最小
To our delighted, the Ni(OH)2/NPGF electrode exhibited excellent performance in sensing glucose with a wide linear range of 2 μM∼7 mM(R2= 0.9955), an ultrasensitivity of 3529 μA mM−1cm−2and a low detection limit of 0.73 μM (S/N = 3).
汇报人：李朋 学号：201420120916
prove that the Ni(OH)2/NPGF composed of Ni(OH)2, metal nickel and metal gold
这两个图的对比证明了Ni(OH)2/NPGF 修饰的电极对葡萄糖有催化作用
创新点
• In this work, we aim at fabricating a new advanced nonenzymatic glucose sensor based on nanoporous structure comprising two pairs of electron mediators of Au/Au(OH) and Ni(II)/Ni(III).We are delighted that an ultrasensitive nonenzymatic glucose sensor has been successfully constructed indeed along this line by incorporating a thin layer of Ni(OH)2 coating about 4 nm in thickness into/on a nanoporous gold film (NPGF) for the first time.
原理
结论与创新点
• A non-enzymatic amperometric sensor based a Cucoated three-dimensional nanoporous gold film was facilely fabricated by electrochemical methods at room temperature within 20 min, which was simple, fast, and controllable. Incorporation of a very thin coating layer of Cu into/on the NPGF substantially enhanced the electrocatalytic activity for electrooxidation of glucose. It can beascribed to the porous structure, high real area, and co-mediatingof Cu(III)/Cu(II) and Au/Au(I). The asproposed Cu/NPGF sensordemonstrated attractive performance in sensing glucose with a wide concentration range (2μM–8.11 mM), short responsive time 3s, ultrasensitivity, low detection limit(0.53μM), good reproducibility, anti-toxicity and long-term stability.
创新点与结论
• In summary, the silver nanoparticles-coated gold nanoporous • film electrode has been prepared and used in the amperometric • detection of Cr(VI) successfully. This method offers the following attractive features. Firstly, the presence of Ag nanoparticles acts as individual nanoparticle arrays,which improves the electrical communications of Au nanoporous substቤተ መጻሕፍቲ ባይዱate. The proposed method exhibits the enhanced electrocatalytic activation for Cr(VI) detection • with a synergistic effect of Ag/Au nanocomposites. Secondly, • the AgNGF electrode provides the wider linear range • and lower detection limit for Cr(VI) detection, which is also • free from distinct interference of coexisting other metal ions. • Thirdly, the method shows a very simple preparation and • fabrication of AgGNF electrode with rapidness and low cost. • So it can be estimated that the proposed method is likely to • have impact on further catalysis, sensors and optoelectronics
创新点
• Many spectrophotometric techniques have been employed for the determination of chromium, however, • these procedures do not satisfy requirements for routine • analysis, mainly because of complicated process design, • long time consumption, intensive labor involvement or the high cost of instrumentation .Instead, the electrochemical method is more attractive for Cr(VI) detection owing to its high sensitivity, relative simplicity,inexpensive equipment and portable options
机理
• Ni(II) → Ni(III) + e− • Au → Au(I) + e− • Ni(III) + Glucose → Ni(II) + Glucolactone Au(I) + Glucose → Au + Glucolactone
从上图可以看出在0.1v时，Glu的响应最大，干扰电流最小
To our delighted, the Ni(OH)2/NPGF electrode exhibited excellent performance in sensing glucose with a wide linear range of 2 μM∼7 mM(R2= 0.9955), an ultrasensitivity of 3529 μA mM−1cm−2and a low detection limit of 0.73 μM (S/N = 3).