1
|
Targhan H, Rezaei A, Aliabadi A, Ramazani A, Zhao Z, Shen X, Zheng H. Photocatalytic removal of imidacloprid pesticide from wastewater using CdS QDs passivated by CQDs containing thiol groups. Sci Rep 2024; 14:530. [PMID: 38177240 PMCID: PMC10766997 DOI: 10.1038/s41598-023-49972-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 12/14/2023] [Indexed: 01/06/2024] Open
Abstract
Over the past decade, CdS QDs have become versatile semiconductors. Surface modification of CdS QDs has become an interesting case study, as it can eliminate surface defects and improve their photochemical properties. In this study, we report a new strategy of using carbon quantum dots containing a large number of thiol groups (CQDs-SH) as a passivating agent for the stabilization of CdS quantum dots (QDs). Various characterization techniques have clearly revealed that the CdS QDs have been successfully passivated by CQDs-SH. The photocatalytic performance of CQDs-SH/CdS QDs was investigated for the degradation of the insecticide imidacloprid from an aqueous solution. Parameters affecting the photodegradation process, including the light source, photocatalyst amount, initial concentration of the pollutant, radiation time, pH, oxidizing agent, and temperature, were investigated. Furthermore, the HPLC technique was applied to quantitatively analyze imidacloprid and its degradation products. The results of the HPLC analysis revealed that under simulated visible light at pH 9, imidacloprid scarcely existed after 90 min of irradiation (90.13% degradation). The LC-MS method was also used to detect the degradation products and investigate the mechanism of photodegradation of the pesticide. The results showed that the CQDs-SH/CdS QDs composite was a promising photocatalyst for the degradation of imidacloprid in wastewater.
Collapse
Affiliation(s)
- Homa Targhan
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Aram Rezaei
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Alireza Aliabadi
- Pharmaceutical Sciences Research Center, Health Institute, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Ali Ramazani
- Department of Chemistry, University of Zanjan, Zanjan, 45371-38791, Iran.
| | - Zhefei Zhao
- Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Xinyi Shen
- Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Huajun Zheng
- Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, 310032, China.
| |
Collapse
|
2
|
Air-stable synthesis of near-infrared AgInSe2 quantum dots for sensitized solar cells. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
3
|
Sianglam P, Ngamdee K, Nalaoh P, Promarak V, Hunt AJ, Ngeontae W. A simple strategy to enhance the sensitivity of fluorescent sensor-based CdS quantum dots by using a surfactant for Hg 2+ detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:4069-4078. [PMID: 34554162 DOI: 10.1039/d1ay01047f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A simple strategy to enhance the detection sensitivity of fluorescent sensor-based CdS quantum dots (CdS QDs) for the detection of mercury ions (Hg2+) was demonstrated. L-Cysteine-capped CdS QDs (L-Cyst-CdS QDs) were synthesized and utilized as a probe for selective detection of Hg2+. The fluorescence intensity of the L-Cyst-CdS QDs was quenched in the presence of Hg2+. However, the detection sensitivity was unsatisfactory. Upon the addition of sodium dodecyl sulfate (SDS), the fluorescence intensity of L-Cyst-CdS QDs can be effectively enhanced. On the other hand, the fluorescence intensity of the L-Cyst-CdS QDs in the presence of SDS (SDS@L-Cyst-CdS QDs) was able to be dramatically decreased with the addition of Hg2+. Furthermore, the proposed sensor displayed excellent selectivity towards Hg2+ compared to other cations. Under optimized conditions, the proposed sensor could be applied to detect trace amounts of Hg2+ with a limit of detection of approximately 36 nM. The applicability of this sensor was demonstrated by the determination of Hg2+ in real water samples, and the results agreed with those obtained from cold vapor atomic absorption spectrometry (CVAAS).
Collapse
Affiliation(s)
- Pradthana Sianglam
- Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
| | - Kessarin Ngamdee
- Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering, School of Molecular Science & Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210 Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science & Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210 Thailand
| | - Andrew J Hunt
- Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
| | - Wittaya Ngeontae
- Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
- Research Center for Environmental and Hazardous Substance Management (EHSM), Khon Kaen University, Khon Kaen 40002, Thailand
| |
Collapse
|
4
|
Glutathione Modified Fluorescent CdS QDs Synthesized Using Environmentally Benign Pathway for Detection of Mercury Ions in Aqueous Phase. J Fluoresc 2020; 30:773-785. [PMID: 32418161 DOI: 10.1007/s10895-020-02545-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 04/23/2020] [Indexed: 12/11/2022]
Abstract
An adept, rapid and novel water-soluble glutathione functionalized CdS quantum dots (GSH@CdS QDs) were fabricated using green pathway for sensing of heavy metal contamination prevalent in industrial wastewater. GSH@CdS QDs were facilely synthesized in an aqueous phase reaction and were effectively characterized using FT-IR, XRD, FESEM, HRTEM and EDX techniques. The distinct fluorescence characteristics of GSH@CdS QDs were explored and the QDs showed selective sensitivity towards mercury ions with a low limit of detection of 0.54 nM under optimal conditions. The detailed interaction between GSH@CdS QDs and Hg2+ and the probable fluorescence quenching mechanism were established in this study. In comparison to already reported fluorescent probes, GSH@CdS QDs showed high sensitivity, biocompatibility, long fluorescence stability and convenient removal of mercury ions. Graphical Abstract Facile green route for the fabrication of glutathione capped CdS quantum dots for fluorescence-based detection of toxic Hg2+ ions.
Collapse
|
5
|
Lv X, Gao P. A fluorescent microsensor for the selective detection of bifenthrin. RSC Adv 2020; 10:19425-19430. [PMID: 35515450 PMCID: PMC9054064 DOI: 10.1039/d0ra02658a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/07/2020] [Indexed: 12/02/2022] Open
Abstract
Based on the fluorescence quenching phenomenon, a smart fluorescent microsensor was synthesized. The bifenthrin (BI) microsensor inherited the high selectivity of molecular imprinted polymers (MIPs) and the excellent fluorescence properties of aqueous CdTe quantum dots (QDs). Aqueous CdTe QDs are functionalized by octadecyl-4-vinylbenzyl-dimethyl-ammonium chloride (OVDAC). A type of functional monomer, 4-vinylphenylboronic acid (VPBA), was used and its boronic acid groups could covalently combine with a cis-diol compound for direct imprinting polymerization. The OVDAC-functionalized aqueous CdTe QDs were used as solid supports and auxiliary monomers. Under optimal conditions, experimentation showed that BI had a linear detection range of 10 to 300 μmol L−1 with a correlation coefficient of 0.9968 and a high imprinting factor (IF) of 4.53. In addition, the prepared MIP-OVDAC/CdTe QDs were successfully used to detect BI in water samples. Therefore, this work provided a highly selective and sensitive fluorescence probe for the detection of BI. In addition, the fluorescence probe could be used to detect other targets by changing the functional monomers. Based on the fluorescence quenching phenomenon, a smart fluorescent microsensor was synthesized.![]()
Collapse
Affiliation(s)
- Xiaodong Lv
- School of Electrical Engineering and Control Science
- Nanjing Tech University
- Nanjing 211899
- China
| | - Peng Gao
- School of Electrical Engineering
- Tongling University
- Tongling 244000
- China
| |
Collapse
|
6
|
An HJ, Lee Y, Liu L, Lee S, Lee JD, Yi Y. Physical and Chemical Stability of Formulations Loaded with Taxifolin Tetra-octanoate. Chem Pharm Bull (Tokyo) 2019; 67:985-991. [PMID: 31270295 DOI: 10.1248/cpb.c19-00283] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chemically stable ester derivatives of taxifolin have become a focus of interest for their role in the satisfactory effects on human health. Accordingly, the aim of this study was to evaluate the physical and chemical stability of different formulations containing 0.02% taxifolin tetra-octanoate, which was proved to possess higher inhibitory effect on tyrosinase activity compared with taxifolin in a cell-free system. In the studies of physical stability, a Brookfield viscometer was used to determine rheological behavior of formulations containing taxifolin tetra-octanoate, and a portable pH meter was used to determine pH change. Moreover, chemical stability was determined by HPLC with UV detection. Formulations were evaluated for 12 weeks stored at 25 and 40°C. Results showed that storage time had no significant influence on viscosity of the formulations containing taxifolin tetra-octanoate, and pH value was relatively stable, which was within the limits of normal skin pH range. In the chemical stability studies, taxifolin tetra-octanoate in the essence formulation was most unstable at 40°C with about 81% degradation in 12 weeks of storage, however, the percentage of remaining taxifolin tetra-octanoate in cream formulation stored for 12 weeks at 25°C was the highest, about 93%. The results in this study may contribute to the development of more stable formulations containing taxifolin tetra-octanoate.
Collapse
Affiliation(s)
| | - Yonghwa Lee
- Department of Cosmetic Science, Hoseo University
| | - Lichao Liu
- Department of Cosmetic Science, Hoseo University.,College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology
| | - Seulbi Lee
- Department of Cosmetic Science, Hoseo University
| | | | - Yongsub Yi
- Department of Cosmetic Science, Hoseo University
| |
Collapse
|
7
|
A novel fluorescence “turn off-on” sensor based on N-doped graphene quantum dots in amino acid ionic liquid medium and its application. Talanta 2019; 197:59-67. [DOI: 10.1016/j.talanta.2019.01.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 12/27/2018] [Accepted: 01/02/2019] [Indexed: 11/30/2022]
|
8
|
A ratiometric fluorometric epinephrine and norepinephrine assay based on carbon dot and CdTe quantum dots nanocomposites. Microchem J 2019. [DOI: 10.1016/j.microc.2018.12.060] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|