Green chemistry approach was employed to synthesize Silica nanoparticles (SiNPs) using aqueous extract of Bryophyllum pinnatum leaf as capping agents. The physicochemical properties of formed nanoparticles were successfully completed through sophisticated characterization methods such as UV-Visible absorbance spectroscopy, Fourier Transform Infra-Red spectroscopy, X-Ray Diffraction, Scanning Electron Microscope, Energy Dispersive X-Ray, Zeta Potential Analysis and Thermo-Gravimetric Analysis. All the characterization results were indicating that the spherical morphology, amorphous nature with an average size of 24 nm of nanoparticles formed. FT-IR results highlighted the key bioactive compounds that could be responsible for capping and reduction to formation of SiNPs. As synthesized SiNPs shows excellent stability with negative zeta potential value − 32 mV. The biomolecules from B. pinnatum were successfully working for the formation of SiNPs with spherical shape. Moreover, to assess agricultural application of green synthesized SiNPs was carried out by seed germination assay on Vigna radiata. The seed germination assay confirms that the low concentration of SiNPs enhances the seed germination. Meanwhile, the higher concentration of the SiNPs inhibits the seed germination, shoot and root formation. SiNPs at optimum concentration could be used in the agriculture field as nano growth promoters.

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The current investigation reports on a green route, simple and eco-friendly method for synthesis of silica nanoparticles from Phyllantus emblica. Appropriate characterization techniques were employed to assess the crystalline nature, microstructure, size, purity, elemental composition and stability of as-biosynthesized silica nanoparticles. The XRD analysis showed a wide-ranging peak at 22∘ of 2θ value and proved that the nanoparticles were crystalline nature with 32 nm average size of particles. FT-IR studies confirmed the occurrence of metal oxide group and presence of phyto-molecules namely hydroxyl, amide, and carboxyl functional groups, which were responsible for formation and stabilization of silica nanomaterials. TGA and Zeta potential analysis determined that silica nanoparticles are highly thermostable. EDX analysis revealed the purity of nanomaterials and spectra confirmed that formation of silica nanomaterials (72.97 weight percentage of SiO2 content) with low impurities. SEM analysis shows that the particles are spherical in shape with low agglomeration. This research work concluded that the P. emblica was an excellent and reliable green resource for production of highly stable and potential silica nanoparticles.

The present study focused on determining the phytochemical analysis of the possible chemical groups present in leaves extract, green synthesis, its characterization, and applications. Bryophyllum pinnatum leaf extract was used to synthesized the Silica nanoparticles. Green synthesized nanoparticles were characterized by different techniques such as UV-Visible absorbance spectroscopy, Fourier Transform Infra-Red, X-Ray Diffraction, Scanning Electron Microscope, Energy Dispersive X-Ray, Zeta Potential Analysis and Thermo-Gravimetric Analysis. A UV-Visible spectrum of silica nanoparticles displayed an absorption peak at 280 nm, and FT-IR results highlighted the key bioactive compounds that could be responsible for capping and reduction of Silica nanoparticles. The XRD pattern analysis showed its crystalline nature and an average size is 24 nm. SEM analysis revealed that synthesized nanomaterials are spherical in shape. Silica nanoparticles showed excellent stability with negative zeta potential value (− 32 mV) and uniform dispersion in aqueous media. Moreover, the seed germination assay was carried out on Vigna radiata using the biogenic silica nanoparticles. The low concentration of silica nanoparticles was enhancing the seed germination. Meanwhile, the higher concentration of the silica nanoparticles decreased seed germination and shoot and root formation. Silica nanoparticles at optimum concentration could be used in the agriculture field as nano growth promoters.