Mesoporous silica imprinted carbon dots for the selective fluorescent detection of triclosan

Shikha Bhogal; Irshad Mohiuddin; Ashok Kumar Malik; Richard J C Brown; Philippe M Heynderickx; Ki-Hyun Kim; Kuldeep Kaur

doi:10.1016/j.scitotenv.2022.157289

Mesoporous silica imprinted carbon dots for the selective fluorescent detection of triclosan

Sci Total Environ. 2022 Nov 1:845:157289. doi: 10.1016/j.scitotenv.2022.157289. Epub 2022 Jul 12.

Authors

Shikha Bhogal¹, Irshad Mohiuddin², Ashok Kumar Malik³, Richard J C Brown⁴, Philippe M Heynderickx⁵, Ki-Hyun Kim⁶, Kuldeep Kaur⁷

Affiliations

¹ Department of Chemistry, Punjabi University, Patiala 147002, Punjab, India.
² Department of Chemistry, Panjab University, Sector-14, Chandigarh 160014, India.
³ Department of Chemistry, Punjabi University, Patiala 147002, Punjab, India. Electronic address: [email protected].
⁴ Atmospheric Environmental Science Department, National Physical Laboratory, Hampton Road, Teddington TW11 0LW, UK.
⁵ Centre for Environmental and Energy Research (CEER) - Engineering of Materials via Catalysis and Characterization, Ghent University Global Campus, 119-5 Songdomunhwa-Ro, Yeonsu-Gu, Incheon, 406-840, South Korea; Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, B-9000, Belgium.
⁶ Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, South Korea. Electronic address: [email protected].
⁷ Department of Chemistry, Mata Gujri College, Fatehgarh Sahib 140407, India.

PMID: 35839899
DOI: 10.1016/j.scitotenv.2022.157289

Abstract

A molecularly imprinted fluorescence sensor built as a mesoporous structured silica imprinted layer on the surface of carbon dots (CDs@m-MIP) was employed for the selective detection of triclosan (TRI). The fluorescence of this CDs@m-MIP was affected sensitively and selectively by TRI via an electron transfer-induced fluorescence quenching mechanism with a detection limit of TRI at 1.08 nM (range 1.72-138 nM) under the optimum setup (e.g., pH, response time, and CDs@m-MIP dose). This approach was used successfully to detect TRI in real water samples (e.g., sewage, river, and tap water). The recoveries of TRI were satisfactory in spiked river and tap water (in 94.7-99.5 %). The outcome of this research is thus expected to help develop highly efficient fluorescent sensing systems towards diverse hazardous compounds including TRI.

Keywords: Carbon dots; Fluorescent sensor; Imprinted polymer; Mesoporous silica; Triclosan; electron transfer induced mechanism.

MeSH terms

Carbon / chemistry
Fluorescent Dyes
Limit of Detection
Molecular Imprinting*
Quantum Dots* / chemistry
Silicon Dioxide / chemistry
Spectrometry, Fluorescence
Triclosan*
Water

Substances

Fluorescent Dyes
Water
Triclosan
Carbon
Silicon Dioxide