Abstract
Herein, a facile method for the synthesis of carbon quantum dots (CQDs) and silver nanoparticle carbon quantum dots (AgNPs-CQDs) nanocomposites from syzygium cumini leaves by pyrolysis treatment for the sensing of Hg2+ ions is reported. The synthesized CQDs were characterized using UV–visible spectroscopy (217 nm), FTIR, XRD and (HR) TEM. The CQDs measured 4 ± 1 nm (diameter) with 0.32 nm interplanar spacing. The CQDs solution showed bright green photoluminescence upon exposure to UV-light. AgNPs-CQDs exhibited Hg2+ selective colorimetric sensing properties (423 nm) over a wide pH range (4-10). Thus, use of CQDs, especially those generated from waste biomass with in-situ reducing and stabilizing agent, avoids the use expensive and toxic cadium sulfide, cadium selenide and zinc sulfide. The work encapsulates the use of a waste as renewable feedstock (green chemistry principles 1 and 7), avoids the use of toxic reagents and auxiliaries (green chemistry principles 3 and 8), and links to SDG 6 – water and sanitation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.