Nickel sulfide-incorporated sulfur-doped graphitic carbon nitride nanohybrid interface for non-enzymatic electrochemical sensing of glucose,Nanoscale Advances

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Nickel sulfide-incorporated sulfur-doped graphitic carbon nitride nanohybrid interface for non-enzymatic electrochemical sensing of glucose
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-07-30 , DOI: 10.1039/d0na00172d
S Vinoth _{1,

2} , P Mary Rajaitha ₁ , A Venkadesh ₃ , K S Shalini Devi ₁ , S Radhakrishnan ₃ , A Pandikumar _{1,

2}

Affiliation

A nickel sulfide-incorporated sulfur-doped graphitic carbon nitride (NiS/S-g-C₃N₄) nanohybrid was utilized as an interface material for the non-enzymatic sensing of glucose in an alkaline medium (0.1 M NaOH). The precursors used in the preparation of NiS/S-g-C₃N₄ hybrid were thiourea and nickel nitrate hexahydrate as the sulfur and nickel sources, respectively. The HRTEM results reveal that NiS nanoparticles incorporated on the S-g-C₃N₄ nanosheet surface could enhance the electrocatalytic activity and electrical conductivity. The prepared NiS/S-g-C₃N₄ crystalline nature, surface functionalities, graphitic nature, thermal stability and surface composition were investigated using XRD, FT-IR, Raman spectroscopy, TGA and XPS analyses. The NiS/S-g-C₃N₄ modified electrode was used for the non-enzymatic sensing of glucose at an applied potential of 0.55 V vs. Ag/AgCl with a detection limit of 1.5 μM (S/N = 3), sensitivity of 80 μA mM⁻¹ cm⁻² and the response time of the fabricated sensor was close to 5 s. Different inorganic ions and organic substances did not interfere during glucose sensing. The NiS/S-g-C₃N₄ nanohybrid material could be extended for a real sample analysis and open the way for diverse opportunities in the electrochemical sensing of glucose.

中文翻译：

用于葡萄糖的非酶电化学传感的硫化镍掺硫石墨氮化碳纳米混合界面

掺入硫化镍的硫掺杂石墨碳氮化物 (NiS/SgC ₃ N ₄ ) 纳米混合物用作界面材料，用于在碱性介质 (0.1 M NaOH) 中对葡萄糖进行非酶传感。用于制备NiS/SgC ₃ N ₄杂化物的前驱体分别是硫脲和硝酸镍六水合物作为硫源和镍源。HRTEM结果表明，掺入SgC ₃ N ₄纳米片表面的NiS纳米颗粒可以提高电催化活性和电导率。制备的 NiS/SgC ₃ N ₄使用 XRD、FT-IR、拉曼光谱、TGA 和 XPS 分析研究了晶体性质、表面功能、石墨性质、热稳定性和表面组成。NiS/SgC ₃ N ₄修饰电极用于葡萄糖的非酶传感，外加电位为 0.55 V vs. Ag/AgCl，检测限为 1.5 μM (S/N = 3)，灵敏度为 80 μA mM ^-1 cm ^-2并且制造的传感器的响应时间接近5 s。不同的无机离子和有机物质在葡萄糖传感过程中没有干扰。NiS/SgC ₃ N ₄纳米杂化材料可以扩展用于实际样品分析，并为葡萄糖电化学传感中的各种机会开辟道路。

更新日期：2020-09-16

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