title: A dual-purpose silver nanoparticles biosynthesized using aqueous leaf extract of Detarium microcarpum: An under-utilized species.
abstract: The need for green synthesis of emerging industrial materials has led to the biosynthesis of nanoparticles from plants to circumvent the adverse by-products of chemical synthesis. In this study, the leaf extract of Detarium mirocarpum Guill & Perr, a small tree belonging to the family Fabaceae (Legume), was used to synthesize silver nanoparticles (DAgNPs). DAgNPs were characterized using spectroscopic techniques (Ultraviolet-Visible spectroscopy and Fourier Transform Infrared spectroscopy) which showed hydroxyl and carbonyl functional groups to be responsible for their synthesis. DAgNPs were observed to be crystalline and spherical. The average size, determined by transmission electron microscopy (TEM) was 17.05nm. The antioxidant activity of DAgNPs ranked from moderate to good. The ability of DAgNPs to sense Hg(2+) and Fe(3+) ions in aqueous medium was also investigated. The quenching of the SPR peak at 430nm was used to monitor the toxic and heavy metal ions with linear ranges of 20-70µgmL(-1) and 10-40µgmL(-1) for Hg(2+) and Fe(3+), respectively. The limit of detection (LOD) and limit of quantification (LOQ) obtained for Hg(2+) was 2.05µgmL(-1) and 6.21µgmL(-1), respectively and for Fe(3+) was 5.01µgmL(-1) and 15.21µgmL(-1), respectively. The intra- and inter-day assessments of accuracy and repeatability gave relative errors less than 1% in all instances. DAgNPs can therefore provide a convenient method of sensing the toxic metals easily.
authors: Department of Chemistry, Federal University Lafia, Nigeria; School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa. Electronic address: labulo@yahoo.com.
authors: Ayomide H
authors: AH
authors: Labulo
authors: Department of Chemistry, Federal University Lafia, Nigeria. Electronic address: eelijah20@gmail.com.
authors: Elijah T
authors: ET
authors: Adesuji
authors: Department of Plant Science and Biotechnology, Federal University Oye-Ekiti, Ekiti, Nigeria. Electronic address: honeycrown1@gmail.com.
authors: Oyinade A
authors: OA
authors: Dedeke
authors: School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa. Electronic address: olusolabodede@gmail.com.
authors: Olusola S
authors: OS
authors: Bodede
authors: Department of Chemistry, Federal University Lafia, Nigeria. Electronic address: charlesbarken@yahoo.com.
authors: Charles O
authors: CO
authors: Oseghale
authors: School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa. Electronic address: moodleyrosh@ukzn.ac.za.
authors: Roshila
authors: R
authors: Moodley
authors: School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa. Electronic address: nyamori@ukzn.ac.za.
authors: Vincent O
authors: VO
authors: Nyamori
authors: Department of Chemistry, Federal University Lafia, Nigeria; Department of Chemistry, Federal University of Agriculture, Abeokuta, Abeokuta, Nigeria. Electronic address: dare3160@hotmail.com.
authors: Enock O
authors: EO
authors: Dare
authors: Department of Pharmaceutical Chemistry, University of Ibadan, Orita UI, Ibadan, Nigeria. Electronic address: jireade@yahoo.com.
authors: Olajire A
authors: OA
authors: Adegoke
mesh_terms: D001713:Biphenyl Compounds / Q000737:chemistry; D003124:Colorimetry; D007887:Fabaceae; D007501:Iron / Q000032:analysis / Q000737:chemistry; D008628:Mercury / Q000032:analysis / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D009569:Nitric Oxide / Q000737:chemistry; D010084:Oxidation-Reduction; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D012835:Silver Nitrate / Q000737:chemistry*
chemical_list: D001713:Biphenyl Compounds; D010851:Picrates; D010936:Plant Extracts; D009569:Nitric Oxide; D012834:Silver; D012835:Silver Nitrate; C004931:1,1-diphenyl-2-picrylhydrazyl; D007501:Iron; D008628:Mercury
keywords: Antioxidant properties; Biosynthesis; Characterization; Colorimetric chemosensor; Detarium microcarpum; Silver nanoparticles