Development of clove oil based nanoencapsulated biopesticide employing mesoporous nanosilica synthesized from paddy straw via bioinspired sol-gel route

Garima Singh, Himanshu Arora, P. Hariprasad, Satyawati Sharma

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Paddy straw (PS) burning is a concerning issue in South Asian countries, clamoring for exploring alternative management strategies. Being a rich source of silica, PS can be a potential nanosilica (SiNPs) source. The current study reports a pioneering approach for green synthesis of high-purity mesoporous SiNPs by sol-gel method using the aqueous extract of Sapindus mukorossi seed pericarp as a stabilizer. The mesoporous nature of SiNPs was harnessed as a carrier for the essential oil to develop the carrier-based formulation. SiNPs were characterized using XRD, EDX, FTIR, FE-SEM, TEM, AFM, DLS, water contact angle, and BET analysis. The synthesized SiNPs possessed a spheroid morphology with an average particle size of 20.34 ± 2.64 nm. XRD results confirmed its amorphous nature. The mesoporous nature of SiNPs was confirmed using BET analysis which showed a cumulative pore volume of 2.059 cm3/g and a high surface area of 746.32 m2/g. The SiNPs were further loaded with clove essential oil (CEO), and the encapsulation of CEO was assessed using UV–Vis, FTIR, and BET analysis. The in-vitro antifungal activity of CEO and CEO-loaded SiNPs (CEO-SiNPs) was evaluated using the agar plate assay. UV–Vis results depicted 62.64% encapsulation of CEO in SiNPs. The antifungal efficacy of CEO-SiNPs against F. oxysporum exhibited minimum inhibitory concentration (MIC), i.e., 125 mg/L, while the MIC of CEO was found to be 250 mg/L. The study delivers new insights into the holistic utilization of PS and propitious contribution toward the circular economy and Sustainable Development Goals (SDGs).

Original languageEnglish
Article number115208
JournalEnvironmental Research
Volume220
DOIs
StatePublished - 1 Mar 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022

Funding

The authors thank Prof. KK Pant, CRE Lab; Prof. Anil Verma, SERL, Department of Chemical Engineering; and Central Research Facility (CRF), IIT Delhi, for providing the facilities and research funds.

FundersFunder number
Central research facility
SERL
Department of Chemical Engineering, Universiti Teknologi Petronas
Indian Institute of Technology Delhi

    Keywords

    • Circular economy
    • Paddy straw
    • SDGs
    • Sapindus mukorossi, nanoencapsulation
    • Silica nanoparticles

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