…
comment: The repository administrator has not yet configured an RDF license.
primary topic: Synthesis of carbon quantum dots via electrochemically-induced carbon dioxide nanobubbles exfoliation of graphite for heavy metal detection in wastewater

Synthesis of carbon quantum dots via electrochemically-induced carbon dioxide nanobubbles exfoliation of graphite for heavy metal detection in wastewater
type: AcademicArticle
type: Article
abstract: Carbon quantum dots (CQDs) offer significant promise across industries due to their distinctive optical properties and strong biocompatibility. However, conventional synthesis methods frequently need more precision in controlling nanoparticle size, shape, and uniformity, limiting their versatility in diverse applications. Therefore, this study introduced an innovative approach to synthesising CQDs by combining electrochemical techniques with carbon dioxide (CO2) nanobubbles, circumventing the need for conventional surfactant-based exfoliation. According to the findings, the synthesised CQDs exhibited remarkable properties, including a high quantum yield of 26.17 and an average particle size of 2.24 ± 1.07 nm. Such characteristics render them exceptionally suitable for portable sensors for heavy metal detection in wastewater. Moreover, the investigation revealed the outstanding selectivity of the synthesised CQDs, particularly towards iron (Fe3+) ions, but demonstrated limited reactivity towards lead (Pb2+) and copper (Cu2+) ions. The novel approach also generated non-toxic CQD under the supply of CO2 nanobubbles, which offers a scalable avenue for developing advanced materials for various applications, including sensors for heavy metal ion detection in wastewater. The conventional synthesis method that relied on sodium dodecyl sulphate (SDS) surfactants without CO2 nanobubbles yielded CQDs with a significantly lower quantum yield of 11.2. In short, incorporating CO2 nanobubbles with electrochemical techniques enhanced quantum yield and superior control over the size and shape of the synthesized CQDs. This novel method successfully produced CQDs with scalable distinct morphologies and provided a new understanding of the CQD synthesis mechanism, with potential applications in portable sensing for environmental monitoring and water quality management. © 2024 The Authors
date: 2024
volume: 12
issue: 3
status: peerReviewed
status: published
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository

Journal of Environmental Chemical Engineering
type: Collection

B.W.L. Ng
type: Person
given name: B.W.L.
family name: Ng

H.C.Y. Foo
type: Person
given name: H.C.Y.
family name: Foo

Y.D. Yat
type: Person
given name: Y.D.
family name: Yat

P.L. Show
type: Person
given name: P.L.
family name: Show

M.K. Lam
type: Person
given name: M.K.
family name: Lam

I.S. Tan
type: Person
given name: I.S.
family name: Tan

HTML Summary of #19645 Synthesis of carbon quantum dots via electrochemically-induced carbon dioxide nanobubbles exfoliation of graphite for heavy metal detection in wastewater
format: text/html
primary topic: Synthesis of carbon quantum dots via electrochemically-induced carbon dioxide nanobubbles exfoliation of graphite for heavy metal detection in wastewater