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Barakat NAM, Amen MT, Ali RH, Nassar MM, Fadali OA, Ali MA, Kim HY. Carbon Nanofiber Double Active Layer and Co-Incorporation as New Anode Modification Strategies for Power-Enhanced Microbial Fuel Cells. Polymers (Basel) 2022; 14:1542. [PMID: 35458291 PMCID: PMC9030816 DOI: 10.3390/polym14081542] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/19/2022] [Accepted: 03/23/2022] [Indexed: 12/04/2022] Open
Abstract
Co-doped carbon nanofiber mats can be prepared by the addition of cobalt acetate to the polyacrylonitrile/DMF electrospun solution. Wastewater obtained from food industries was utilized as the anolyte as well as microorganisms as the source in single-chamber batch mode microbial fuel cells. The results indicated that the single Co-free carbon nanofiber mat was not a good anode in the used microbial fuel cells. However, the generated power can be distinctly enhanced by using double active layers of pristine carbon nanofiber mats or a single layer Co-doped carbon nanofiber mat as anodes. Typically, after 24 h batching time, the estimated generated power densities were 10, 92, and 121 mW/m2 for single, double active layers, and Co-doped carbon nanofiber anodes, respectively. For comparison, the performance of the cell was investigated using carbon cloth and carbon paper as anodes, the observed power densities were smaller than the introduced modified anodes at 58 and 62 mW/m2, respectively. Moreover, the COD removal and Columbic efficiency were calculated for the proposed anodes as well as the used commercial ones. The results further confirm the priority of using double active layer or metal-doped carbon nanofiber anodes over the commercial ones. Numerically, the calculated COD removals were 29.16 and 38.95% for carbon paper and carbon cloth while 40.53 and 45.79% COD removals were obtained with double active layer and Co-doped carbon nanofiber anodes, respectively. With a similar trend, the calculated Columbic efficiencies were 26, 42, 52, and 71% for the same sequence.
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Affiliation(s)
- Nasser A M Barakat
- Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt
| | - Mohamed Taha Amen
- Microbiology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Rasha H Ali
- Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt
| | - Mamdouh M Nassar
- Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt
| | - Olfat A Fadali
- Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt
| | - Marwa A Ali
- Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia 61519, Egypt
| | - Hak Yong Kim
- Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Korea
- Department of Organic Materials and Fiber Engineering, Jeonbuk National University, Jeonju 54896, Korea
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Gromov VF, Ikim MI, Gerasimov GN, Trakhtenberg LI. Crown Ethers: Selective Sorbents of Radioactive and Heavy Metals. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121010036] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Rh-induced Support Transformation and Rh Incorporation in Titanate Structures and Their Influence on Catalytic Activity. Catalysts 2020. [DOI: 10.3390/catal10020212] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Rh is one of the most effective metals in several technologically important heterogeneous catalytic reactions, like the hydrogenation of CO2, and CO, the CO+H2O reaction, and methane and ethanol transformations. Titania and titanates are among the most frequently studied supports for Rh nanoparticles. The present study demonstrates that the nature of the support has a marked influence on the specific activity. For comparison, the catalytic activity of TiO2 P25 is also presented. It is pointed out that a certain amount of Rh can be stabilized as cation (Rh+) in ion-exchange positions (i.e., in atomic scale distribution) of the titanate framework. This ionic form does not exists on TiO2. We pay distinguished attention not only to the electronic interaction between Rh metal and the titania/titanate support, but also to the Rh-induced phase transitions of one-dimensional titanate nanowires (TiONW) and nanotubes (TiONT). Support transformation phenomena can be observed in Rh-loaded titanates. Rh decorated nanowires transform into the TiO2(B) phase, whereas their pristine counterparts recrystallize into anatase. The formation of anatase is dominant during the thermal annealing process in both acid-treated and Rh-decorated nanotubes; Rh catalysis this transformation. We demonstrate that the phase transformations and the formation of Rh nanoclusters and incorporated Rh ions affect the conversion and the selectivity of the reactions. The following initial activity order was found in the CO2 + H2, CO + H2O and C2H5OH decomposition reactions: Rh/TiO2 (Degussa P25) ≥ Rh/TiONW > Rh/TiONT. On the other hand it is remarkable that the hydrogen selectivity in ethanol decomposition was two times higher on Rh/TiONW and Rh/TiO(NT) catalysts than on Rh/TiO2 due to the presence of Rh+ cations incorporated into the framework of the titanate structures.
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Lu X, Tang W, Du S, Wen L, Weng J, Ding Y, Willis WS, Suib SL, Gao PX. Ion-Exchange Loading Promoted Stability of Platinum Catalysts Supported on Layered Protonated Titanate-Derived Titania Nanoarrays. ACS APPLIED MATERIALS & INTERFACES 2019; 11:21515-21525. [PMID: 31132239 DOI: 10.1021/acsami.9b04378] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Supported metal catalysts are one of the major classes of heterogeneous catalysts, which demand good stability in both the supports and catalysts. Herein, layered protonated titanate-derived TiO2 (LPT-TiO2) nanowire arrays were synthesized to support platinum catalysts using different loading processes. The Pt ion-exchange loading on pristine LPTs followed by thermal annealing resulted in superior Pt catalysts supported on the LPT-TiO2 nanoarrays with excellent hydrothermal stability and catalytic performance toward CO and NO oxidations as compared to the Pt catalysts through wet-impregnation on the anatase TiO2 (ANT-TiO2) nanoarrays resulted from thermal annealing of LPT nanoarrays. Both loading processes resulted in highly dispersed Pt nanoparticles (NPs) with average sizes smaller than 1 nm at their pristine states. However, after hydrothermal aging at 800 °C for 50 h, highly dispersed Pt NPs were only retained on the ion-exchanged LPT-TiO2 nanoarrays with the support structure consisting of a mixture of 74% anatase and 26% rutile TiO2. For the wet-impregnation loading directly on anatase TiO2 nanoarrays derived from LPT, the Pt catalysts experienced severe agglomeration after hydrothermal aging, with the nanoarray supports consisting of 86% anatase and 14% rutile TiO2. Spectroscopy analysis suggested that Pt2+ cations intercalated into the interlayers of the titanate frameworks through ion-exchange impregnation procedure, which altered the chemical and electronic structures of the catalysts, resulting in the shifts of the electronic binding energy, Raman bands, and optical energy bandgap. The ion-exchangeable nature of LPT nanoarrays clearly provides a structural modification in Pt-doped LPT that has resulted in a strong interaction between the Pt catalysts and LPT-TiO2 nanoarray supports, leading to the enhanced hydrothermal stability of the catalysts. Considering the wide applications of the LPT and TiO2 nanomaterials as supports for catalysts, this finding provides a new pathway to design highly stable supported metal catalysts for different reactions.
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Affiliation(s)
| | | | | | | | | | - Yong Ding
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - William S Willis
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
| | - Steven L Suib
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
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5
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Hydrogen evolution in the photocatalytic reaction between methane and water in the presence of CO2 on titanate and titania supported Rh and Au catalysts. Top Catal 2018. [DOI: 10.1007/s11244-018-0936-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Buchholcz B, Haspel H, Oszkó A, Kukovecz A, Kónya Z. Titania nanotube stabilized BiOCl nanoparticles in visible-light photocatalysis. RSC Adv 2017. [DOI: 10.1039/c6ra28490f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Photocatalysis is a green approach in environmental organic pollutant decomposition.
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Affiliation(s)
- B. Buchholcz
- Department of Applied and Environmental Chemistry
- University of Szeged
- H-6720 Szeged
- Hungary
| | - H. Haspel
- Department of Applied and Environmental Chemistry
- University of Szeged
- H-6720 Szeged
- Hungary
| | - A. Oszkó
- Department of Physical Chemistry and Materials Science
- University of Szeged
- H-6720 Szeged
- Hungary
| | - A. Kukovecz
- Department of Applied and Environmental Chemistry
- University of Szeged
- H-6720 Szeged
- Hungary
- MTA-SZTE “Lendület” Porous Nanocomposites Research Group
| | - Z. Kónya
- Department of Applied and Environmental Chemistry
- University of Szeged
- H-6720 Szeged
- Hungary
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group
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Sápi A, Kéri A, Kálomista I, Dobó DG, Ákos Szamosvölgyi ÁS, Juhász KL, Ákos Kukovecz ÁK, Kónya Z, Galbács G. Determination of the platinum concentration of a Pt/silica nanocomposite decorated with ultra small Pt nanoparticles using single particle inductively coupled plasma mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 2017. [DOI: 10.1039/c7ja00039a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The accurate load concentration of ultra small nanoparticles in a Pt/SiO2 nanocomposite is determined by the novel spICP-MS analytical method.
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Affiliation(s)
- András Sápi
- Department of Applied and Environmental Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
| | - Albert Kéri
- Department of Inorganic and Analytical Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
| | - Ildikó Kálomista
- Department of Inorganic and Analytical Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
| | - Dorina G. Dobó
- Department of Applied and Environmental Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
| | | | - Koppány L. Juhász
- Department of Applied and Environmental Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
| | - Ákos Kukovecz Ákos Kukovecz
- Department of Applied and Environmental Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
- MTA-SZTE “Lendület” Porous Nanocomposites Research Group
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group
| | - Gábor Galbács
- Department of Inorganic and Analytical Chemistry
- University of Szeged
- 6720 Szeged
- Hungary
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Kukovecz Á, Kordás K, Kiss J, Kónya Z. Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires. SURFACE SCIENCE REPORTS 2016. [DOI: 10.1016/j.surfrep.2016.06.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10
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The Synthesis of Dimethyl Carbonate by the Oxicarbonylation of Methanol Over Cu Supported on Carbon Norit. Catal Letters 2014. [DOI: 10.1007/s10562-014-1460-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Li B, Zhang Y, Ma D, Ma T, Shi Z, Ma S. Metal-Cation-Directed de Novo Assembly of a Functionalized Guest Molecule in the Nanospace of a Metal–Organic Framework. J Am Chem Soc 2014; 136:1202-5. [DOI: 10.1021/ja410868r] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Baiyan Li
- Department
of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Yiming Zhang
- Department
of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Dingxuan Ma
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, Changchun 130012, China
| | - Tianliang Ma
- College
of Resource and Environmental Science, Jilin Agricultural University, Changchun 130118, China
| | - Zhan Shi
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, Changchun 130012, China
| | - Shengqian Ma
- Department
of Chemistry, University of South Florida, Tampa, Florida 33620, United States
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12
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Pusztai P, Puskás R, Varga E, Erdőhelyi A, Kukovecz Á, Kónya Z, Kiss J. Influence of gold additives on the stability and phase transformation of titanate nanostructures. Phys Chem Chem Phys 2014; 16:26786-97. [PMID: 25372766 DOI: 10.1039/c4cp04084h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Au is stabilized on titanate nanowires partially in positively charged gold form and also as Au clusters. Au loaded nanotubes loose their tubular morphology and are readily transformed into anatase. On the other hand, gold stabilizes the layered structure of titanate nanowires.
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Affiliation(s)
- P. Pusztai
- Department of Applied and Environmental Chemistry
- University of Szeged
- , Hungary
| | - R. Puskás
- Department of Applied and Environmental Chemistry
- University of Szeged
- , Hungary
| | - E. Varga
- Department of Physical Chemistry and Materials Science
- University of Szeged
- H-6720 Szeged, Hungary
| | - A. Erdőhelyi
- Department of Physical Chemistry and Materials Science
- University of Szeged
- H-6720 Szeged, Hungary
| | - Á. Kukovecz
- Department of Applied and Environmental Chemistry
- University of Szeged
- , Hungary
- MTA-SZTE “Lendület” Porous Nanocomposites Research Group
- Hungary
| | - Z. Kónya
- Department of Applied and Environmental Chemistry
- University of Szeged
- , Hungary
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group H-6720 Szeged
- , Hungary
| | - J. Kiss
- Department of Physical Chemistry and Materials Science
- University of Szeged
- H-6720 Szeged, Hungary
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group H-6720 Szeged
- , Hungary
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