Statistical approach to synthesise biogenic silica nanoparticles from rice husk and conjugated with Justicia adhatoda extract as green, slow‐release biocide

Abstract

Biogenic silica synthesised from rice husk was used as a controlled release system of an eco-friendly biocide consisting of a Justicia adhatoda extract. Fourier-transform infrared spectroscopy (FTIR) indicated the presence of ester bonds between the silica support and the conjugated Justicia adhatoda extract. Surface area analysis and microscopy confirmed a high level of Justicia adhatoda extract loading in the silica support. The phytochemical investigation of Justicia adhatoda was done by Gas chromatography-mass spectrometry (GC-MS) spectroscopy. Moreover, compared with the naked biogenic silica nanoparticles, a better thermal stability was determined for the conjugated system of the extracted compounds. Trial of kinetic release of silica: Justicia adhatoda ∼29% of loaded Justicia adhatoda was released within 1 h and then the rate of release became slow. Net release of Justicia adhatoda was observed up to 50% within 7 h. The Justicia adhatoda compounds released from silica also showed the improved mortality rate against stored product pest rice weevil (Sitophilus oryzae).This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

Silica/Annona muricata nano-hybrid: Synthesis and anticancer activity against breast cancer

“…have studied the TGA for Justicia adhatoda and silica nanoparticles. They had similar results; i.e., approximately 40 % of the extract was conjugated in the study [ 28 ].

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Sustainable chemistry approach for the preparation of bluish green emissive copper nanoclusters fromJusticia adhatodaleaves extract: a facile analytical approach for the sensing of myoglobin andl-thyroxine

“…Justicia adhatoda ( J. adhatoda ) is a tall shrub commonly referred to as Malabar nut or adulsi that possesses remarkable biomedical activities such as antibacterial, antitubercular, 5 antifungal, anti-inflammatory, antitussive, antiasthmatic, larvicidal, phytotoxic, hemagglutination, cytotoxic, and antiulcer. 6 The presence of different alkaloids such as adhatodine, vasicoline, and anisotine in J. adhatoda makes it an ideal ligand for the treatment of haemostasis and other blood bleeding diseases. 7 J. adhatoda plant extracts are used as a hemostatic agent in herbal therapy for cardiovascular diseases 8 and hemorrhage.…”