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Rahman MM, Karim MR, Alam MM, Zaman MB, Alharthi N, Alharbi H, Asiri AM. Facile and efficient 3-chlorophenol sensor development based on photolumenescent core-shell CdSe/ZnS quantum dots. Sci Rep 2020; 10:557. [PMID: 31953448 PMCID: PMC6969177 DOI: 10.1038/s41598-019-57091-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 12/09/2019] [Indexed: 12/29/2022] Open
Abstract
Quantum dots (QDs) are semiconducting inorganic nanoparticles, tiny molecules of 2-10 nm sizes to strength the quantum confinements of electrons. The QDs are good enough to emit light onto electrons for exciting and returning to the ground state. Here, CdSe/ZnS core/shell QDs have been prepared and applied for electrochemical sensor development in this approach. Flat glassy carbon electrode (GCE) was coated with CdSe/ZnS QDs as very thin uniform layer to result of the selective and efficient sensor of 3-CP (3-chlorophenol). The significant analytical parameters were calculated from the calibration plot such as sensitivity (3.6392 µA µM-1 cm-2) and detection limit (26.09 ± 1.30 pM) with CdSe/ZnS/GCE sensor probe by electrochemical approach. The calibration curve was fitted with the regression co-efficient r2 = 0.9906 in the range of 0.1 nM ∼ 0.1 mM concentration, which denoted as linear dynamic range (LDR). Besides these, it was performed the reproducibility in short response time and successfully validated the fabricated sensor for 3-CP in the real environmental and extracted samples. It is introduced as a noble route to detect the environmental phenolic contaminants using CdSe/ZnS QDs modified sensor by electrochemical method for the safety of healthcare and environmental fields at broad scales.
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Affiliation(s)
- Mohammed M Rahman
- Center of Excellence for Advanced Materials Research (CEAMR) & Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
| | - Mohammad Rezaul Karim
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), King Saud University, Riyadh 11421 & K.A.CARE Energy Research and Innovation Center, Riyadh, 11451, Saudi Arabia.
| | - M M Alam
- Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet, 3100, Bangladesh
| | - M Badruz Zaman
- Quality Engineering Test Establishment, Department of National Defence, Gatineau, QC, J8X 1C6, Canada
| | - Nabeel Alharthi
- Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - Hamad Alharbi
- Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - Abdullah M Asiri
- Center of Excellence for Advanced Materials Research (CEAMR) & Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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