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首页> 外文期刊>Materials science & engineering >Nanostructured SnO_2 encapsulated guar-gum hybrid nanocomposites for electrocatalytic determination of hydrazine
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Nanostructured SnO_2 encapsulated guar-gum hybrid nanocomposites for electrocatalytic determination of hydrazine

机译：纳米结构的SnO_2包覆的瓜尔胶杂化纳米复合材料用于肼的电催化测定

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摘要

The present article deals with synthesis of sol-gel derived tin dioxide (SnO_2) nanoparticles encapsulated in to guar gum (GG) biopolymer as the organic-inorganic hybrid materials for the determination of hydrazine. The organic-inorganic hybrid combines the perfunctory strength offered by the inorganic SnO_2 nanoparticles with flexible binding sites provided by the organic biopolymer (GG) solution by the ultrasonication. The phase identification, crystalline size, surface morphology and optical properties of prepared SnO_2 and SnO_2-GG nanocomposites has been investigated through FT-IR, XRD, SEM, AFM, TEM, UV-Vis, and PL techniques. The colloidal solution of SnO_2 and GG is electrophoretically deposited (EPD) onto the indium tin-oxide (ITO) glass substrate and studied for the electrooxidation of hydrazine. Under the optimized experimental conditions, the linearity between the current response and the hydrazine concentration has been obtained in the range of 2-22 mM, with a low detection limit of 2.76 mM and a high sensitivity of 5.72 μA cm~(-2). Based on the linear increase in ampero-metric current, a sensitive hydrazine electrochemical sensor is constructed. The proposed SnO_2-GG/ITO electrode shows a good response time (35 s), reproducibility, and long-term stability. The obtained results suggest that SnO_2-GG nanocomposites electrode provides a favorable sensing platform for the electrochemical studies. In addition, the cyclic voltammetry (CV) studies are used to evaluate the kinetic parameters.
机译：本文涉及封装在瓜尔豆胶（GG）生物聚合物中的溶胶-凝胶衍生的二氧化锡（SnO_2）纳米颗粒的合成，作为有机-无机杂化材料，用于测定肼。有机-无机杂化体通过超声将无机SnO_2纳米颗粒提供的渗透强度与有机生物聚合物（GG）溶液提供的柔性结合位相结合。通过FT-IR，XRD，SEM，AFM，TEM，UV-Vis和PL技术研究了制备的SnO_2和SnO_2-GG纳米复合材料的物相鉴定，晶体尺寸，表面形貌和光学性质。 SnO_2和GG的胶体溶液被电泳沉积（EPD）到氧化铟锡（ITO）玻璃基板上，并研究了肼的电氧化作用。在优化的实验条件下，电流响应与肼浓度之间存在线性关系，范围为2-22 mM，检出限低至2.76 mM，灵敏度高至5.72μAcm〜（-2）。基于安培电流的线性增加，构造了灵敏的肼电化学传感器。提出的SnO_2-GG / ITO电极显示出良好的响应时间（35 s），重现性和长期稳定性。结果表明，SnO_2-GG纳米复合电极为电化学研究提供了良好的传感平台。此外，循环伏安法（CV）研究用于评估动力学参数。

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  • 来源
    《Materials science & engineering》 |2016年第1期|432-441|共10页
  • 作者

    Priya Malik; Manish Srivastava; Ranjana Verma; Manish Kumar; D. Kumar; Jay Singh;

  • 作者单位

    Department of Applied Chemistry & Polymer Technology, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi 110042, India;

    Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India;

    Solar Energy Material Laboratory, Department of Energy, Tezpur University, Tezpur, Assam 784 028, India;

    Department of Applied Chemistry & Polymer Technology, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi 110042, India;

    Department of Applied Chemistry & Polymer Technology, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi 110042, India;

    Department of Applied Chemistry & Polymer Technology, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi 110042, India;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Guar-gum; SnO_2; Nanoparticles; Hydrazine; Electrochemical studies;

    机译：瓜尔胶SnO_2;纳米颗粒;肼;电化学研究;

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