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Fragmented lignin-assisted synthesis of a hierarchical ZnO nanostructure for ammonia gas sensing

机译：用于氨气传感的分层ZnO纳米结构的碎片化木质素辅助合成

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摘要

In the present study, we demonstrated the use of fragmented lignin in the synthesis of a hierarchical-type structure of ZnO nanorods. Lignin was isolated from bagasse by the microwave assisted method and its fragmentation was achieved in alkaline conditions along with hydrogen peroxide. Lignin and fragmented lignin were purified by crystallisation followed by column chromatography and characterized by UV-visible spectroscopy, Frontier infra-red spectroscopy (FTIR), H-1-NMR and high resolution mass spectroscopy (HRMS). Fragmented lignin was utilized as a template for the synthesis of ZnO nanorods, which were characterized by powder XRD, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-DRS for the determination of crystal structure, particle morphology and band gap. XRD of the ZnO samples revealed a hexagonal wurtzite structure. The morphology of ZnO without fragmented lignin showed agglomerated nanoparticles and with fragmented lignin, a self-assembled hierarchical nanostructure due to nanorods of 30 nm diameter and 200-500 nm length was observed. The fragmented lignin showed a pronounced effect on the particle size and morphology of ZnO nanoparticles. We measured the response of the hierarchical ZnO nanostructure (50 ppm) for sensing NH3 in terms of change in voltage across known resistance. We observed the response and recovery upon introduction of the analyte ammonia gas at 175 degrees C.
机译：在本研究中，我们证明使用片段化木质素在合成ZnO纳米棒的层级结构中。通过微波辅助方法从甘蔗渣中分离出木质素，并且在碱性条件下与过氧化氢进行碎裂。通过结晶纯化木质素和片段化木质素，然后通过柱色谱法纯化，并通过UV可见光光谱，前沿红外光谱（FTIR），H-1-NMR和高分辨率质谱（HRMS）。片段化的木质素用作合成ZnO纳米棒的模板，其特征在于粉末XRD，扫描电子显微镜（SEM），透射电子显微镜（TEM），透射电子显微镜（TEM）和用于测定晶体结构，颗粒形态和带的UV-DRS差距。 ZnO样品的XRD揭示了六边形紫立茨结构。没有碎片木质素的ZnO的形态显示纳米颗粒和碎片木质素，观察到由于30nm的纳米棒和200-500nm长度引起的自组装分层纳米结构。片段化木质素对ZnO纳米颗粒的粒度和形态显示出明显的影响。我们测量了分层ZnO纳米结构（50ppm）的响应，以便在已知电阻上的电压变化方面感测NH3。我们观察到在175℃下引入分析物氨气时的反应和恢复。

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  • 来源
    《RSC Advances》 |2019年第5期|共9页
  • 作者

    Joshi Kanchan M.; Shinde Dnyaneshwar R.; Nikam Latesh K.; Panmand Rajendra; Sethi Yogesh A.; Kale Bharat B.; Chaskar Manohar G.;

  • 作者单位

    Prof Ramakrishna More Coll Pune 44 Maharashtra India;

    Prof Ramakrishna More Coll Pune 44 Maharashtra India;

    BR Gholap Coll Pune Maharashtra India;

    Govt India CMET Dept Informat Technol Nanocrystalline Lab Pashan Rd Pune 411007 Maharashtra India;

    Govt India CMET Dept Informat Technol Nanocrystalline Lab Pashan Rd Pune 411007 Maharashtra India;

    Govt India CMET Dept Informat Technol Nanocrystalline Lab Pashan Rd Pune 411007 Maharashtra India;

    Prof Ramakrishna More Coll Pune 44 Maharashtra India;

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  • 正文语种 eng
  • 中图分类 化学;
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