Study on the process of preparing nano-lanthanum oxide from plant extract

doi:10.16178/j.issn.0528-9017.20240898

Abstract

Abstract:

In this study，we synthesized the nano-lanthanum oxide material through the reaction between the extract of Sophorajaponica powder and lanthanum nitrate solution. The structural characteristics of the material were identified using transmission electron microscopy（TEM）and X-ray diffraction（XRD）. The study explored the effects of extraction method of plant extract，volume of plant extract，pH value of plant extract，volume of lanthanum nitrate solution，and reaction time on the product yield（precipitate amount）during the synthesis process of nano-lanthanum oxide. TEM observations revealed that the average diameter of the nano-lanthanum oxide particles was（84.45±0.29）nm. The XRD patterns basically confirmed the formation of lanthanum oxide. Based on the analysis results of the single-factor trials，we believed that during the synthesis of nano-lanthanum oxide using the extract of Sophora japonica powder，larger amounts of precipitate were produced under 40 mL of plant extract，10 mL of lanthanum nitrate solution，pH value of 6.22，and heating time of 1 hour，the amount of precipitate produced by this reaction was relatively large. Furthermore，the precipitate amount was significantly higher compared with the method of stirring at room temperature. The study showed that the green synthesis of lanthanum oxide nanomaterials using Sophora japonica powder was not only convenient and rapid but also cost-effective and environmentally friendly，presenting a promising prospect in the green synthesis of rare earth nanomaterials.

Key words: green synthesis, nano-lanthanum oxide, nanotechnology, rare earth material

CLC Number:

TB383.2

ZHENG Ming, ZHEN Luyuan, SHI Qiuxiang, CAI Panpan, CHEN Dong, SONG Xiaoyu, ZHANG Yuqian. Study on the process of preparing nano-lanthanum oxide from plant extract[J]. Journal of Zhejiang Agricultural Sciences, 2026, 67(3): 737-742.

Figures/Tables 7

Fig.1 Transmission electron microscopy（TEM）observations of nano-lanthanum oxide

Fig.2 X-ray diffraction（XRD）analysis pattern of nano-lanthanum oxide

Fig.3 Effects of plant extract volume on precipitate yield

Fig.4 Effects of lanthanum nitrate solution volume on precipitate yield

Fig.5 Effects of pH value of plant extract on precipitate yield

Fig.6 Effects of extraction methods on precipitate yield

Fig.7 Effects of reaction time on precipitate yield

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