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Molodtsova T, Gorshenkov M, Kubrin S, Saraev A, Ulyankina A, Smirnova N. One-step access to bifunctional γ-Fe2O3/δ-FeOOH electrocatalyst for oxygen reduction reaction and acetaminophen sensing. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Santhan A, Hwa KY, Ganguly A. Self-assembled nanorods with reduced graphene oxide as efficient nano-catalyst for dual modality sensing of hazardous phenolic compound. CHEMOSPHERE 2022; 307:135715. [PMID: 35843434 DOI: 10.1016/j.chemosphere.2022.135715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/13/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
The modern development in the agricultural production has huge influential factors being highly beneficial and also includes some health hazards. Under the class of chlorophenols, 2,4,6-trichlorophenol is a widely used chemical which remains as a major pollutant in the environment. The detection of 2,4,6-trichlorophenol was initiated as a controlling measure to decrease the seriousness prevailing in the ecosystem. The electrochemical and UV-vis absorption sensing platform are simple and low-cost detection techniques with precise and sensitive analysis. Cadmium tin oxide integrated with the reduced graphene oxide was employed as a nanohybrid for the construction of the working electrode. The structural and morphological analysis confirmed the high degree of crystallinity of the nanocomposite with nanorod formation. The high surface area, with high charge carrier mobility, and increased electrical conductivity of the material boosted the 2,4,6-trichlorophenol detection. The active surface area was calculated to be 0.068 cm-1, 0.089 cm-1, 0.118 cm-1 and 0.146 cm-1 for all the modified electrodes. The resistance of the electrodes was about 91.4 Ω, 72.9 Ω, 48.8 Ω and 41.6 Ω. The linear range of 2,4,6-trichlorophenol was 0.019 μM-0.299 μM and 1.299 μM-1678.97 μM in electrochemical sensing and 10.99 μM-24.84 μM in UV detection. The obtained limit of detection with the formulation 3σ/SD was about 3.05 nM and 80 nM with sensitivity about 14.01 μA μM-1 cm-2. The real sample detection in environmental real samples showed good recovery results. The specific selectivity, good repeatability, reproducibility and stability analysis proves the good sensing parameters. Thus, the fabricated electrode is highly sufficient of sensing 2,4,6-trichlorophenol. These excellent features of the material can be applied for several other applications which will provide good performances.
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Affiliation(s)
- Aravindan Santhan
- Graduate Institute of Energy and Optoelectronic Materials, National Taipei University of Technology, Taipei, Taiwan; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - Kuo-Yuan Hwa
- Graduate Institute of Energy and Optoelectronic Materials, National Taipei University of Technology, Taipei, Taiwan; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan; Center for Biomedical Industry, National Taipei University of Technology, Taipei, Taiwan.
| | - Anindita Ganguly
- Graduate Institute of Energy and Optoelectronic Materials, National Taipei University of Technology, Taipei, Taiwan; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan
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Chen PC, Ganguly A, Kanna Sharma TS, Chou KY, Chang SM, Hwa KY. Investigation of T site variation in spinel aluminates TAl2O4 (T= Mg, Zn & Cu), and formation of electrocatalyst CuAl2O4/carbon for efficient sensing application. CHEMOSPHERE 2022; 301:134458. [PMID: 35452642 DOI: 10.1016/j.chemosphere.2022.134458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/21/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Spinel structured aluminates TAl2O4 (T = Mg, Zn, and Cu) were synthesized by a facile hydrothermal method. The resultant enhancement in the electrochemical behavior was achieved due to the covalent synergism among the elements coexisting together. Structural and morphological characterizations were performed by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and field emission scanning electron microscopy. MgAl2O4, ZnAl2O4 and CuAl2O4 has displayed same space group Fd3m of Laue class lattice type of the cubic structure as they were synthesized at same temperature (600 °C). CuAl2O4 spinel structure displayed a nanoneedle like structure along with the small sized cylindrical particles alongside to which CuAl2O4 spinel is combined with activated carbon (CuAl/C) and was applied to develop a facile sensor for the electrochemical detection of Acetaminophen (ACAP) using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), which exhibited maximum conductivity, and a substantial electroactive surface area. Finally, the defect-rich composite, CuAl/C, showed excellent sensor performance towards DPV with 21.5 nM limit of detection (LOD) in a wide linear working range of 0.199 μM-165.88 μM ACAP concentration, with a high sensitivity of 19.1221 μA μM-1cm2. Additionally, the sensor showed excellent recovery results in real-time analysis for environmental aquatic samples like industrial wastewater and Tuna Fish.
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Affiliation(s)
- Po Chou Chen
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan, ROC; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC
| | - Anindita Ganguly
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC; International Graduate Program in Energy and Optoelectronic Materials, National Taipei University of Technology, Taipei, Taiwan, ROC
| | | | - Kuan-Yu Chou
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan, ROC; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC
| | - Shu-Mei Chang
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan, ROC; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC; Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei, Taiwan, ROC.
| | - Kuo-Yuan Hwa
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan, ROC; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC; Center for Biomedical Industry, National Taipei University of Technology, Taipei, Taiwan, ROC.
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Palpandi K, Bhuvaneswari C, Babu SG, Raman N. Rational design of ruddlesden–popper phase Mn 2SnO 4 for ultra-sensitive and highly selective detection of chloramphenicol in real-life samples. NEW J CHEM 2022. [DOI: 10.1039/d2nj00813k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A low-cost and eco-friendly Mn2SnO4/GCE electrochemical sensor was fabricated to detect chloramphenicol present in milk powder and eye drops.
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Affiliation(s)
- Karuppaiya Palpandi
- Research Department of Chemistry, VHNSN College, Virudhunagar-626 001, India
| | - Chellapandi Bhuvaneswari
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamilnadu, India
| | - Sundaram Ganesh Babu
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamilnadu, India
| | - Natarajan Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar-626 001, India
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