Abstract

The inverse spinel nanocrystalline pure and doped nickel ferrite particles were synthesized by co-precipitation method. The thick films of both pure and doped nickel ferrite nanoparticles were prepared by coating the material on glass substrate via screen printing method. The XRD was used to confirm cubic, crystalline nickel ferrites. The scanning electron microscopy confirms nanosized, cubic nanoparticles of nickel ferrite, and their morphology was investigated. The energy-dispersive spectroscopy was used to comprise elemental composition for pure and doped ferrites. Transmission electron microscopy was attributed for investigation of surface morphology, crystal structure identification of nickel ferrites. The FT-IR was used to find the vibrational frequencies, symmetric, asymmetric stretching and bending modes of metal oxide linkage. The thick films of nickel ferrite were employed for sensing phenomenon of gases such as LPG, NO₂, CH₃-OH, C₂H₅-OH, NH₃ and petrol vapours. The pure nickel ferrite showed excellent results for ammonia and nitrogen dioxide gases up to 90.42 and 86.42, respectively. Manganese- and cobalt-doped ferrites were excellent for ammonia and petrol vapours. Modified nickel ferrite effect of dopants cobalt and manganese was investigated. Pure and doped ferrites showed excellent response and recovery for ammonia, NO₂, petrol vapours and LPG gases.

Graphical abstract

The graphical abstract presenting the synthesis process of pure and modified nickel ferrite prepared by co-precipitation method. The prepared material ferrite thick films were exclusively utilized for the detection of some pollutant gases.

中文翻译：

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纳米晶改性的镍铁氧体薄膜：用于工业和环境气体污染物检测的有效传感器

摘要

通过共沉淀法合成了尖晶石纳米晶反型纯净掺杂镍铁氧体颗粒。通过丝网印刷方法将材料涂覆在玻璃基板上，可以制备纯镍铁氧体和掺杂镍铁氧体纳米粒子的厚膜。X射线衍射用于确认立方晶状的镍铁氧体。扫描电子显微镜确认了镍铁氧体的纳米级立方纳米颗粒，并对其形态进行了研究。能量色散光谱用于包含纯铁氧体和掺杂铁氧体的元素组成。透射电子显微镜应归功于表面形态的研究，镍铁氧体的晶体结构鉴定。FT-IR用于发现金属氧化物键的振动频率，对称，不对称拉伸和弯曲模式。₂，CH ₃ -OH，C ₂ H ₅ -OH，NH ₃和汽油蒸气。对于氨和二氧化氮气体，纯镍铁氧体分别显示高达90.42和86.42的优异结果。锰和钴掺杂的铁氧体对氨气和汽油蒸气非常有用。研究了钴和锰掺杂物的改性镍铁氧体效应。纯的和掺杂的铁氧体对氨，NO ₂，汽油蒸气和液化石油气具有出色的响应和回收率。

图形概要

该图形摘要介绍了通过共沉淀法制备的纯和改性镍铁氧体的合成过程。制备的材料铁氧体厚膜专门用于检测某些污染物气体。