Nanostructured LaNiO3 Synthesised Using Reverse Micellar Route and Study of Their Magnetic and Photoelectrochemical Properties

IF 1.3 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2025-10-14 DOI:10.1007/s40010-025-00937-8

Kirandeep Bhagat, Vaishali Sethi, Kandalam V. Ramanujachary, Samuel E. Lofland, Ashok Kumar Ganguli

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Abstract

The perovskite, LaNiO₃, was synthesised in nanocrystalline form through reverse micellar route by varying the surfactants (CTAB, Triton X-100, Tergitol). These oxides were calcined at different temperatures from 750 to 800 °C. The structural and magnetic properties of LaNiO₃ was investigated by PXRD, FESEM-EDX, TEM. PXRD of all samples show pure phase of LaNiO₃ crystallizing in the rhombohedral system. The particle size of nanoparticles varies from 12 to 300 nm with the variation in the microemulsion system used for synthesis. The magnetic susceptibility data shows antiferromagnetic behaviour with the possibility of weak ferromagnetic contribution at low temperatures. The band gap obtained from UV–Visible spectroscopy vary in the range of 2.82–3.08 eV. The Mott–Schottky studies show that the all the samples of LaNiO₃ have a n-type behaviour.

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反胶束法合成纳米结构LaNiO3及其磁性和光电化学性能研究

通过改变表面活性剂（CTAB, Triton X-100, Tergitol），通过反胶束途径合成了纳米形态的钙钛矿LaNiO3。这些氧化物在750 ~ 800℃的不同温度下煅烧。采用PXRD、FESEM-EDX、TEM等研究了LaNiO3的结构和磁性能。所有样品的PXRD均显示LaNiO3纯相在菱形体系中结晶。纳米颗粒的粒径随合成微乳液体系的不同而变化，从12 nm到300 nm不等。磁化率数据显示出反铁磁行为，在低温下可能有弱铁磁的贡献。紫外可见光谱的带隙在2.82 ~ 3.08 eV范围内变化。Mott-Schottky研究表明，所有LaNiO3样品都具有n型行为。

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