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Zhang L, Zhang L, Xue J, Yuan H, Zhou C, Guo T, Wang L, Fu Z. Cobalt Species-Loaded MOFs as Chemiluminescent Catalysts for Monitoring Carbendazim. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12785-12792. [PMID: 37643321 DOI: 10.1021/acs.langmuir.3c01634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
The application of active metal-based nanoscale catalysts as signal enhancers for chemiluminescent immunoassay (CLIA) is restricted by poor thermodynamic stability and ease of aggregation. For the present exploration, zirconium-based MOFs UiO-66-NH2 were adopted as supports to load cobalt species by an impregnation-reduction approach. Cobalt species were uniformly distributed in the framework architecture of the MOF materials. The prepared cobalt-loaded MOF hybrids, noted as UiO-66-NH2/Co, display superior chemiluminescence (CL) catalytic activity owing to the introduction of cobalt catalytic centers. The CL catalytic capability of UiO-66-NH2/Co hybrids is about 18 times of that of free cobalt ions at the same cobalt amount. The results of mechanism exploration manifest that the hybrids are capable of accelerating the decay of hydrogen peroxide and promoting the yield of reactive oxygen species. Based on their remarkable CL catalytic capability, a CLIA approach was proposed to monitor carbendazim by adopting the hybrids as signal probes, which showed the merits of high sensitivity and satisfactory selectivity. Carbendazim was quantitated within a concentration range of 0.05 to 60 ng mL-1, with a detection limit of 19.8 pg mL-1. The results for monitoring spiked samples verify the acceptable practicality of the proposed CLIA approach.
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Affiliation(s)
- Lvxia Zhang
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Lingli Zhang
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, Chongqing Institute for Food and Drug Control, Chongqing 401121, China
| | - Jinxia Xue
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Hongwei Yuan
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Chunjie Zhou
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, Chongqing Institute for Food and Drug Control, Chongqing 401121, China
| | - Ting Guo
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Lin Wang
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Zhifeng Fu
- NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
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Elnabawy E, Elsherbiny IMA, Abdelsamad AMA, Anis B, Hassan A, Ulbricht M, Khalil ASG. Tailored CNTs Buckypaper Membranes for the Removal of Humic Acid and Separation of Oil-in-Water Emulsions. MEMBRANES 2020; 10:membranes10050097. [PMID: 32408564 PMCID: PMC7281685 DOI: 10.3390/membranes10050097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/08/2020] [Accepted: 05/09/2020] [Indexed: 12/17/2022]
Abstract
Carbon nanotubes (CNTs) are a robust material and proven as a promising candidate for a wide range of electronic, optoelectronic and environmental applications. In this work, two different methods were utilized for the preparation of CNTs exhibiting different aspect ratios via chemical vapor deposition (CVD). The as-prepared CNTs were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2adsorption isotherms, thermogravimetric analysis and Raman spectroscopy in order to investigate their morphological and structural properties. Free-standing CNTs "buckypaper" membranes were fabricated, characterized and tailored to meet the requirements of two applications, i.e., (1) the removal of humic acid (HA) from water and (2) separation of oil-in-water emulsions. It was revealed that the hydrophobic buckypapers showed high separation performance for Shell oil-in-water emulsions filtration, with up to 98% through the accumulation of oil droplets onto the membrane surface. The absorption capacity of buckypaper membranes for various organic liquids (oil, chloroform and toluene) was evaluated over 10 absorption cycles to investigate their recyclability and robustness. Moreover, surface modification was introduced to the pristine CNTs to increase their surface hydrophilicity and improve the pure water permeability of buckypapers. These modified buckypapers showed high flux for HA solutions and excellent HA rejection efficiency up to 95%via size exclusion and electrostatic repulsion mechanisms.
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Affiliation(s)
- Eman Elnabawy
- Physics Department and Center for Environmental and Smart Technology, Faculty of Science, Fayoum University, Fayoum 63514, Egypt; (E.E.); (A.H.)
| | - Ibrahim M. A. Elsherbiny
- Lehrstuhlfür Technische Chemie II, and Center for Water and Environmental Research (ZWU), University of Duisburg-Essen, 45141 Essen, Germany; (I.M.A.E.); (A.M.A.A.); (M.U.)
| | - Ahmed M. A. Abdelsamad
- Lehrstuhlfür Technische Chemie II, and Center for Water and Environmental Research (ZWU), University of Duisburg-Essen, 45141 Essen, Germany; (I.M.A.E.); (A.M.A.A.); (M.U.)
- Water Pollution Dept, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
| | - Badawi Anis
- Spectroscopy Dept, Physics Division, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt;
| | - Abdelwahab Hassan
- Physics Department and Center for Environmental and Smart Technology, Faculty of Science, Fayoum University, Fayoum 63514, Egypt; (E.E.); (A.H.)
| | - Mathias Ulbricht
- Lehrstuhlfür Technische Chemie II, and Center for Water and Environmental Research (ZWU), University of Duisburg-Essen, 45141 Essen, Germany; (I.M.A.E.); (A.M.A.A.); (M.U.)
| | - Ahmed S. G. Khalil
- Physics Department and Center for Environmental and Smart Technology, Faculty of Science, Fayoum University, Fayoum 63514, Egypt; (E.E.); (A.H.)
- Materials Science & Engineering Department, School of Innovative Design Engineering, Egypt-Japan University of Science and Technology (E-JUST), 179 New Borg El-Arab City, Alexandria 21934, Egypt
- Correspondence:
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Matus E, Khitsova L, Efimova O, Yashnik S, Shikina N, Ismagilov Z. Preparation of Carbon Nanotubes with Supported Metal Oxide Nanoparticles: Effect of Metal Precursor on Thermal Decomposition Behavior of the Materials. EURASIAN CHEMICO-TECHNOLOGICAL JOURNAL 2019. [DOI: 10.18321/ectj887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
To develop new catalysts based on carbon nanomaterials with supported metal oxide nanoparticles for oxidative transformations of sulfur compounds, a series of metal oxide nanoparticle-decorated carbon nanotubes (MOx/CNTs) were prepared by incipient wetness impregnation at a variation of the active metal type (M = Ce, Mo, Cu). The thermal decomposition of bulk and CNT supported metal precursors used in the preparation of MOx/CNTs was analyzed under inert atmosphere employing several thermoanalytical techniques (thermogravimetry, differential thermogravimetry and differential scanning calorimetry) coupled with mass spectrometry. The thermolysis parameters of the bulk and supported metal precursors were compared and the effect of CNT support on the decomposition pattern of compounds was elucidated. It was established that the decomposition of metal precursors supported on CNTs was started and completed at temperatures of 15‒25 and 25‒70 °C lower, respectively, compared with the bulk active metal precursor. The enhancement of CNT support stability against thermal degradation is observed in the following row of metal cations: Ce < Cu < Мо < pristine and metal anions of precursor: nitrate < chloride < sulfate. The optimal mode of thermal treatment of catalyst and appropriate active metal precursors were selected for advanced synthesis of nanosized MOx/CNT catalyst.
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Freddi S, Drera G, Pagliara S, Goldoni A, Sangaletti L. Enhanced selectivity of target gas molecules through a minimal array of gas sensors based on nanoparticle-decorated SWCNTs. Analyst 2019; 144:4100-4110. [DOI: 10.1039/c9an00551j] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Layers of CNTs decorated with metal and metal–oxide nanoparticles can be used to develop highly selective gas sensor arrays.
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Affiliation(s)
- Sonia Freddi
- I-Lamp and Dipartimento di Matematica e Fisica
- Università Cattolica del Sacro Cuore
- 25121 Brescia
- Italy
| | - Giovanni Drera
- I-Lamp and Dipartimento di Matematica e Fisica
- Università Cattolica del Sacro Cuore
- 25121 Brescia
- Italy
| | - Stefania Pagliara
- I-Lamp and Dipartimento di Matematica e Fisica
- Università Cattolica del Sacro Cuore
- 25121 Brescia
- Italy
| | | | - Luigi Sangaletti
- I-Lamp and Dipartimento di Matematica e Fisica
- Università Cattolica del Sacro Cuore
- 25121 Brescia
- Italy
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