Sol–gel-based silver nanoparticles-doped silica – Polydiphenylamine nanocomposite for micro-solid-phase extraction

Green synthesis of silver nanoparticles using terrestrial fern (Gleichenia Pectinata (Willd.) C. Presl.): characterization and antimicrobial studies

“…It is worthy of note that both physical and biological methods which involve the use of expensive, toxic and non-biodegradable materials which pose a great risk to humans, animals and the environment (Bagheri and Banihashemi, 2015). However, those which involve the use of plant extracts (green synthesis) are eco-friendly, cost effective, sustainable, easy to synthesize.…”

Advances in organic–inorganic hybrid sorbents for the extraction of organic and inorganic pollutants in different types of food and environmental samples

“…In this case, the substrate used was silica‐conductive polymer (SiO 2 ‐PDPA) that enhanced the properties of nanoparticles which basically render high surface area‐to‐volume ratio resulting in great extraction capacity and efficiency. The attachment of Ag nanoparticles on the π‐electrons at the back bone of polymer, SiO 2 ‐PDPA was able to offer excellent affinity, higher specific surface area, and increment in loading capacity . In addition, the excellent adsorption interactions involved between Ag‐SiO 2 ‐PDPA and pesticides were dipole–dipole and van der Waals forces.…”

“…There have been considerable developments in the state of the art of microextraction techniques involving organic–inorganic hybrid based adsorbents particularly in the environmental pollutants analysis. For example, silver nanoparticles doped silica‐polydiphenylamine (Ag‐SiO 2 ‐PDPA) nanocomposite has been synthesized by Bagheri and co‐workers to extract pesticides from river, well, and tap water . Originally, the silver nanoparticles tend to aggregate resulting in diminishing their efficacy for long‐term use.…”

Silica nanoparticle based techniques for extraction, detection, and degradation of pesticides

“…Among these, liquid-liquid, solidphase extraction or solid-phase micro-extraction protocols are routinely used for recovering pesticides from environmental samples [37]. In addition, polydiphenylamine coated silica-silver core shells have been used for microsolid phase extraction of organophosphate (Diazinon, Fenthion, Ethion) and organochlorine (Lindane, Piperonyl-butoxide) pesticides from aqueous samples [42]. The adsorbed pesticides were eluted from nanoparticles by methanol and quantified by using Gas Chromatography Mass…”