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Redhwan TZ, Ali Y, Howlader MMR, Haddara YM. Electrochemical Sensing of Lead in Drinking Water Using Copper Foil Bonded with Polymer. SENSORS (BASEL, SWITZERLAND) 2023; 23:1424. [PMID: 36772462 PMCID: PMC9920348 DOI: 10.3390/s23031424] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/24/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
Levels of lead (Pb) in tap water that are well below established guidelines are now considered harmful, so the detection of sub-parts-per-billion (ppb) Pb levels is crucial. In this work, we developed a two-step, facile, and inexpensive fabrication approach that involves direct bonding of copper (Cu) and liquid crystal polymer (LCP) followed by polyester resin printing for masking onto Cu/LCP to fabricate Cu thin-film-based Pb sensors. The oxygen plasma-treated surfaces resulted in strongly bonded Cu/LCP with a high peel strength of 500 N/m due to the highly hydrophilic nature of both surfaces. The bonded specimen can withstand wet etching of the electrode and can address delamination of the electrode for prolonged use in application environments. The Cu-foil-based electrochemical sensor showed sensitivity of ~11 nA/ppb/cm2 and a limit of detection (LOD) of 0.2 ppb (0.2 µg/L) Pb ions in water. The sensor required only 30 s and a 100 µL sample to detect Pb. To date, this is the most rapid detection of Pb performed using an all-Cu-based sensor. The selectivity test of Cu to Pb with interferences from cadmium and zinc showed that their peaks were separated by a few hundred millivolts. This approach has strong potential towards realizing low-cost, highly reliable integrated water quality monitoring systems.
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Tene T, Bellucci S, Guevara M, Viteri E, Arias Polanco M, Salguero O, Vera-Guzmán E, Valladares S, Scarcello A, Alessandro F, Caputi LS, Vacacela Gomez C. Cationic Pollutant Removal from Aqueous Solution Using Reduced Graphene Oxide. NANOMATERIALS 2022; 12:nano12030309. [PMID: 35159653 PMCID: PMC8838539 DOI: 10.3390/nano12030309] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 12/12/2022]
Abstract
Reduced graphene oxide (rGO) is one of the most well-known graphene derivatives, which, due to its outstanding physical and chemical properties as well as its oxygen content, has been used for wastewater treatment technologies. Particularly, extra functionalized rGO is widely preferred for treating wastewater containing dyes or heavy metals. Nevertheless, the use of non-extra functionalized (pristine) rGO for the removal of cationic pollutants is not explored in detail or is ambiguous. Herein, pristine rGO—prepared by an eco-friendly protocol—is used for the removal of cationic pollutants from water, i.e., methylene blue (MB) and mercury-(II) (Hg-(II)). This work includes the eco-friendly synthesis process and related spectroscopical and morphological characterization. Most importantly, the investigated rGO shows an adsorption capacity of 121.95 mg g−1 for MB and 109.49 mg g−1 for Hg (II) at 298 K. A record adsorption time of 30 min was found for MB and 20 min for Hg (II) with an efficiency of about 89% and 73%, respectively. The capture of tested cationic pollutants on rGO exhibits a mixed physisorption–chemisorption process. The present work, therefore, presents new findings for cationic pollutant adsorbent materials based on oxidized graphenes, providing a new perspective for removing MB molecules and Hg(II) ions.
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Affiliation(s)
- Talia Tene
- Grupo de Investigación Ciencia y Tecnología de Materiales, Universidad Técnica Particular de Loja, Loja 110160, Ecuador;
| | - Stefano Bellucci
- INFN-Laboratori Nazionali di Frascati, Via E. Fermi 54, I-00044 Frascati, Italy;
| | - Marco Guevara
- School of Physical Sciences and Nanotechnology, Yachay Tech University, Urcuquí 100119, Ecuador;
- ITECA—Instituto de Tecnologías y Ciencias Avanzadas, Villarroel y Larrea, Riobamba 060104, Ecuador
| | - Edwin Viteri
- Faculty of Mechanical Engineering, Escuela Superior Politécnica de Chimborazo, Riobamba 060155, Ecuador;
| | - Malvin Arias Polanco
- Instituto Tecnológico de Santo Domingo, Área de Ciencias Básicas y Ambientales, Av. Los Próceres, Santo Domingo 10602, Dominican Republic;
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
| | - Orlando Salguero
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
| | - Eder Vera-Guzmán
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
| | - Sebastián Valladares
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
| | - Andrea Scarcello
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
- Surface Nanoscience Group, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33C, I-87036 Rende, Italy
- INFN, Sezione LNF, Gruppo Collegato di Cosenza, Via P. Bucci, I-87036 Rende, Cosenza, Italy
| | - Francesca Alessandro
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
- Surface Nanoscience Group, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33C, I-87036 Rende, Italy
| | - Lorenzo S. Caputi
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
- Surface Nanoscience Group, Department of Physics, University of Calabria, Via P. Bucci, Cubo 33C, I-87036 Rende, Italy
| | - Cristian Vacacela Gomez
- School of Physical Sciences and Nanotechnology, Yachay Tech University, Urcuquí 100119, Ecuador;
- UNICARIBE Research Center, University of Calabria, I-87036 Rende (CS), Italy; (O.S.); (E.V.-G.); (S.V.); (A.S.); (F.A.); (L.S.C.)
- Correspondence:
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Das A, Sangaranarayanan MV. Shape-controlled synthesis of three-dimensional triangular bismuth microstructures and sensing of H2O2. CrystEngComm 2016. [DOI: 10.1039/c5ce02326b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electrodeposition of triangular microstructures of Bi on indium tin oxide surfaces is carried out by optimizing the potentials, precursor concentrations and deposition times.
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Affiliation(s)
- Ashis Das
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036, India
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Ma L, Tian Y, Yang C, Li Y, Zhou Z, Liang Y, Tian X, Wang Y. Controlled synthesis of truncated octahedral bismuth micron particles with giant positive magnetoresistance. CrystEngComm 2015. [DOI: 10.1039/c5ce01228g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Micron-sized truncated octahedral bismuth crystals with promising giant magnetoresistance were prepared by a facile solvothermal method in a highly alkaline media system.
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Affiliation(s)
- Longlong Ma
- Faculty of Materials Science and Chemistry
- China University of Geosciences
- Wuhan, PR China
| | - Yayang Tian
- Faculty of Materials Science and Chemistry
- China University of Geosciences
- Wuhan, PR China
| | - Chao Yang
- Faculty of Materials Science and Chemistry
- China University of Geosciences
- Wuhan, PR China
| | - Yong Li
- Faculty of Materials Science and Chemistry
- China University of Geosciences
- Wuhan, PR China
| | - Zhaoxin Zhou
- Faculty of Materials Science and Chemistry
- China University of Geosciences
- Wuhan, PR China
| | - Yujun Liang
- Faculty of Materials Science and Chemistry
- China University of Geosciences
- Wuhan, PR China
| | - Xike Tian
- Faculty of Materials Science and Chemistry
- China University of Geosciences
- Wuhan, PR China
| | - Yanxin Wang
- School of Environmental Studies
- China University of Geosciences
- Wuhan, PR China
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