Controllable phytosynthesis of gold nanoparticles and investigation of their size and morphology-dependent photocatalytic activity under visible lightShow others and affiliations
2020 (English)In: Journal of Photochemistry and Photobiology A: Chemistry, ISSN 1010-6030, E-ISSN 1873-2666, Vol. 392, p. 1-11, article id 112429Article in journal (Refereed) Published
Abstract [en]
Plants mediated synthesis of gold nanoparticles (AuNPs) containing desired characteristics for their suitable potential applications has been a challenging task, which is causing a major hindrance towards its commercialization. Therefore, herein phytosynthesis of AuNPs with required size and morphology has been achieved through manipulating the reaction conditions including reaction temperature and volume of Elaeis guineensis leaves (EGL) extract. Furthermore, photocatalytic potential of EGL mediated AuNPs having different size and shape has also been explored for the removal of methylene blue (MB) under visible light irradiation. The reaction temperature and volume of EGL strongly influenced the size and morphology of AuNPs, which are directly associated with the photocatalytic activities. The experimental results revealed that predominantly spherical and ultra-smaller size AuNPs with particle size of 16.26â±â5.84ânm, formed at 70â°C showed the highest removal efficiency up to 92.55 % in 60âmin. This highest photocatalytic activity of AuNPs could be attributed to the availability of higher number of low-coordinated gold (Au) atoms in the MB aqueous solution, which might have boosted the adsorption of the MB on the surface of particles and accelerated the degradation phenomenon. The proposed photocatalytic degradation mechanism of AuNPs for MB was also explained. The highly photoactive EGL mediated AuNPs with controllable morphology and size could be an advance step in future in chemical and biomedical applications.
Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 392, p. 1-11, article id 112429
Keywords [en]
guineensis leaves, Gold nanoparticles, Photocatalytic degradation, Reaction conditions, Controllable size and morphology
National Category
Chemical Sciences
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:kau:diva-81004DOI: 10.1016/j.jphotochem.2020.112429ISI: 000518869500035Scopus ID: 2-s2.0-85079156631OAI: oai:DiVA.org:kau-81004DiVA, id: diva2:1478460
2020-10-222020-10-222021-11-29Bibliographically approved