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Zouari M, Hribernik S, Marrot L, Tzolov M, DeVallance DB. Manganese dioxide-coated biocarbon for integrated adsorption-photocatalytic degradation of formaldehyde in indoor conditions. Heliyon 2024; 10:e29993. [PMID: 38694080 PMCID: PMC11061683 DOI: 10.1016/j.heliyon.2024.e29993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/03/2024] [Accepted: 04/18/2024] [Indexed: 05/03/2024] Open
Abstract
Formaldehyde is a common indoor air pollutant with hazardous effects on human health. This study investigated the efficiency of biocarbon (BC) functionalized with variable contents of MnO2 for formaldehyde removal in ambient conditions via integrated adsorption-photocatalytic degradation technology. The sample with the highest formaldehyde removal potential was used to prepare a functional coating made of acrylic binder mixed with 20 wt% of the particles and applied on beech (Fagus sylvatica L) substrate. SEM images showed that MnO2 was deposited around and inside the pores of the BC. EDX spectra indicated the presence of Mn peaks and increased content of oxygen in the doped BC compared to pure BC, which indicated the successful formation of MnO2. Raman spectra revealed that the disorder in the BC's structure increased with increasing MnO2 loadings. FTIR spectra of BC-MnO2 samples displayed additional peaks compared to the BC spectrum, which were attributed to MnO vibrations. Moreover, the deposition of increased MnO2 loadings decreased the porosity of the BC due to pores blockage. The BC sample containing 8 % Mn exhibited the highest formaldehyde removal efficiency in 8 h, which was 91 %. A synergetic effect between BC and MnO2 was observed. The formaldehyde removal efficiency and capacity of the coating reached 43 % and 6.1 mg/m2, respectively, suggesting that the developed coating can be potentially used to improve air quality in the built environment.
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Affiliation(s)
- Mariem Zouari
- InnoRenew CoE, Livade 6a, 6310, Izola, Slovenia
- Faculty of Mathematics, Natural Sciences, and Information Technologies, University of Primorska, Muzejski trg 2, 6000, Koper, Slovenia
| | - Silvo Hribernik
- Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, SI-2000, Maribor, Slovenia
| | - Laetitia Marrot
- FRISSBE, Slovenian National Building and Civil Engineering Institute (ZAG), 1000, Ljubljana, Slovenia
| | - Marian Tzolov
- College of Science and Technology, Commonwealth University of Pennsylvania, 401 North Fairview Street, Lock Haven, PA, 17745, United States
| | - David B. DeVallance
- College of Science and Technology, Commonwealth University of Pennsylvania, 401 North Fairview Street, Lock Haven, PA, 17745, United States
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Khandare LN, Late DJ, Chaure NB. MoS 2 nanobelts-carbon hybrid material for supercapacitor applications. Front Chem 2023; 11:1166544. [PMID: 37674526 PMCID: PMC10477701 DOI: 10.3389/fchem.2023.1166544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 07/28/2023] [Indexed: 09/08/2023] Open
Abstract
The MoS2 nanobelts/Carbon hybrid nanostructure was synthesized by the simple hydrothermal method. The MoS2 nanobelts were distributed in the interlayers of Lemon grass-derived carbon (LG-C), provides the active sites and avoid restacking of the sheets. The structural and morphological characterization of MoS2/LG-C and LG-C were performed by Raman spectroscopy, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The electrochemical measurements were studied with cyclic voltammetry, the galvanostatic charge-discharge method, and electrochemical impedance spectroscopy. The specific capacitance of MoS2/LG-C and LG-C exhibits 77.5 F g-1 and 30.1 F g-1 at a current density of 0.5 A g-1. The MoS2/LG-C-based supercapacitor provided the maximum power density and energy density of 273.2 W kg-1 and 2.1 Wh kg-1, respectively. Furthermore, the cyclic stability of MoS2/LG-C was tested using charging-discharging up to 3,000 cycles, confirming only a 71.6% capacitance retention at a current density of 3 A g-1. The result showed that MoS2/LG-C is a superior low-cost electrode material that delivered a high electrochemical performance for the next generation of electrochemical energy storage.
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Affiliation(s)
- Lina N. Khandare
- Department of Physics, Savitribai Phule Pune University, Pune, India
| | - Dattatray J. Late
- Centre for Nanoscience and Nanotechnology, Amity University Maharashtra, Mumbai, India
| | - Nandu B. Chaure
- Department of Physics, Savitribai Phule Pune University, Pune, India
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Nechikott AA, Nayak PK. Electrochemical capacitance properties of pre-sodiated manganese oxide for aqueous Na-ion supercapacitors. RSC Adv 2023; 13:14139-14149. [PMID: 37180020 PMCID: PMC10167946 DOI: 10.1039/d3ra01657a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 04/30/2023] [Indexed: 05/15/2023] Open
Abstract
Mn-based oxides are widely investigated as electrode materials for electrochemical supercapacitors, because of their high specific capacitance in addition to the high abundance, low cost, and environmental friendliness of Mn. The pre-insertion of alkali metal ions is found to improve the capacitance properties of MnO2. While the capacitance properties of MnO2, Mn2O3, P2-Na0.5MnO2, and O3-NaMnO2etc. are reported, there is no report yet on the capacitive performance of P2-Na2/3MnO2, which has already been studied as a potential positive electrode material for Na-ion batteries. In this work, we have synthesized sodiated manganese oxide, P2-Na2/3MnO2 by a hydrothermal method followed by annealing at a high temperature of about 900 °C for 12 h. For comparison, manganese oxide Mn2O3 (without pre-sodiation) is synthesized by following the same method, but annealing at 400 °C. While P2-Na2/3MnO2 exhibits a high specific capacitance of 234 F g-1, Mn2O3 can deliver only 115 F g-1 when cycled at 0.4 A g-1 in an aqueous electrolyte of 1.0 M Na2SO4 in a three-electrode cell. An asymmetric supercapacitor Na2/3MnO2‖AC is assembled, which can exhibit a SC of 37.7 F g-1 at 0.1 A g-1 with an energy density of 20.9 W h kg-1, based on the total weight of Na2/3MnO2 and AC with an operational voltage of 2.0 V and possesses excellent cycling stability. This asymmetric Na2/3MnO2‖AC supercapacitor can be cost-effective considering the high abundance, low-cost and environmental friendliness of Mn-based oxides and aqueous Na2SO4 electrolyte.
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Affiliation(s)
- Aneesh Anand Nechikott
- Materials Electrochemistry Research Laboratory, Department of Chemistry, SRM Institute of Science and Technology Kattankulathur-603203 India
| | - Prasant Kumar Nayak
- Materials Electrochemistry Research Laboratory, Department of Chemistry, SRM Institute of Science and Technology Kattankulathur-603203 India
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Liu J, Bao J, Zhang X, Gao Y, Zhang Y, Liu L, Cao Z. MnO 2-based materials for supercapacitor electrodes: challenges, strategies and prospects. RSC Adv 2022; 12:35556-35578. [PMID: 36545086 PMCID: PMC9744108 DOI: 10.1039/d2ra06664e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 11/28/2022] [Indexed: 12/15/2022] Open
Abstract
Manganese dioxide (MnO2) has always been the ideal electrode material for supercapacitors due to its non-toxic nature and high theoretical capacity (1370 F g-1). Over the past few years, significant progress has been made in the development of high performance MnO2-based electrode materials. This review summarizes recent research progress in experimental, simulation and theoretical studies for the modification of MnO2-based electrode materials from different perspectives of morphology engineering, defect engineering and heterojunction engineering. Several main approaches to achieve enhanced electrochemical performance are summarized, respectively increasing the effective active site, intrinsic conductivity and structural stability. On this basis, the future problems and research directions of electrode materials are further envisaged, which provide theoretical guidance for the adequate design and synthesis of MnO2-based electrode materials for use in supercapacitors.
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Affiliation(s)
- Juyin Liu
- School of Chemical Engineering, Inner Mongolia University of TechnologyNo. 49 Aimin Street, Xincheng DistrictHohhot 010051PR China
| | - Jiali Bao
- School of Chemical Engineering, Inner Mongolia University of TechnologyNo. 49 Aimin Street, Xincheng DistrictHohhot 010051PR China
| | - Xin Zhang
- School of Chemical Engineering, Inner Mongolia University of TechnologyNo. 49 Aimin Street, Xincheng DistrictHohhot 010051PR China
| | - Yanfang Gao
- School of Chemical Engineering, Inner Mongolia University of TechnologyNo. 49 Aimin Street, Xincheng DistrictHohhot 010051PR China
| | - Yao Zhang
- School of Chemical Engineering, Inner Mongolia University of TechnologyNo. 49 Aimin Street, Xincheng DistrictHohhot 010051PR China
| | - Ling Liu
- School of Chemical Engineering, Inner Mongolia University of TechnologyNo. 49 Aimin Street, Xincheng DistrictHohhot 010051PR China
| | - Zhenzhu Cao
- School of Chemical Engineering, Inner Mongolia University of TechnologyNo. 49 Aimin Street, Xincheng DistrictHohhot 010051PR China
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Diantoro M, Istiqomah I, Fath YA, Mufti N, Nasikhudin N, Meevasana W, Alias YB. Hierarchical Activated Carbon-MnO 2 Composite for Wide Potential Window Asymmetric Supercapacitor Devices in Organic Electrolyte. MICROMACHINES 2022; 13:1989. [PMID: 36422418 PMCID: PMC9696615 DOI: 10.3390/mi13111989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/11/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
The consumption of electrical energy grows alongside the development of global industry. Generating energy storage has become the primary focus of current research, examining supercapacitors with high power density. The primary raw material used in supercapacitor electrodes is activated carbon (AC). To improve the performance of activated carbon, we used manganese dioxide (MnO2), which has a theoretical capacitance of up to 1370 Fg-1. The composite-based activated carbon with a different mass of 0-20% MnO2 was successfully introduced as the positive electrode. The asymmetric cell supercapacitors based on activated carbon as the anode delivered an excellent gravimetric capacitance, energy density, and power density of 84.28 Fg-1, 14.88 Wh.kg-1, and 96.68 W.kg-1, respectively, at 1 M Et4NBF4, maintaining 88.88% after 1000 test cycles.
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Affiliation(s)
- Markus Diantoro
- Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang 65145, Indonesia
- Center of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Malang 65145, Indonesia
| | - Istiqomah Istiqomah
- Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang 65145, Indonesia
| | - Yusril Al Fath
- Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang 65145, Indonesia
| | - Nandang Mufti
- Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang 65145, Indonesia
- Center of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Malang 65145, Indonesia
| | - Nasikhudin Nasikhudin
- Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang 65145, Indonesia
| | - Worawat Meevasana
- School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Yatimah Binti Alias
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
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Jeong H, Sun Cho D, Gi Hong C, Thanh Nguyen C, Seok Moon M, Tran VH, Ku Kwac L. A novel hierarchical heterostructure derived from alpha iron oxide supported carbon nano-network for high-performance supercapacitor application. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wu Y, Tang M, Zhong Y, Guo Z, Li K, Yang Y, Li Q. High-efficiency activation of the C–H bond to synthesize p-methoxy benzaldehyde over a MnO 2/CNT/Gr catalyst. NEW J CHEM 2022. [DOI: 10.1039/d2nj00589a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The selective oxidation of C(sp3)–H was achieved by the MnO2/CNTs/Gr electrocatalyst: 81.03% faradaic efficiency and 82.73% selectivity of p-methoxy benzaldehyde were obtained.
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Affiliation(s)
- Yi Wu
- College of Science, Beijing Forestry University, Beijing, 100083, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing, 100083, China
| | - Mengyi Tang
- College of Science, Beijing Forestry University, Beijing, 100083, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing, 100083, China
| | - Yan Zhong
- College of Material Science and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Zhenlong Guo
- College of Science, Beijing Forestry University, Beijing, 100083, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing, 100083, China
| | - Kexin Li
- College of Science, Beijing Forestry University, Beijing, 100083, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing, 100083, China
| | - Youdi Yang
- College of Science, Beijing Forestry University, Beijing, 100083, China
| | - Qiang Li
- College of Science, Beijing Forestry University, Beijing, 100083, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing, 100083, China
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Electrocatalysts for Energy Conversion and Storage Devices. Catalysts 2021. [DOI: 10.3390/catal11121491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Energy’s efficient conversion and storage are closely correlated to the development of electrochemical energy technologies, such as fuel cells, batteries, electrolyzers, etc [...]
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Removal of Aniline and Benzothiazole Wastewaters Using an Efficient MnO 2/GAC Catalyst in a Photocatalytic Fluidised Bed Reactor. MATERIALS 2021; 14:ma14185207. [PMID: 34576439 PMCID: PMC8467099 DOI: 10.3390/ma14185207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/02/2021] [Accepted: 09/08/2021] [Indexed: 12/07/2022]
Abstract
This work presents an efficient method for treating industrial wastewater containing aniline and benzothiazole, which are refractory to conventional treatments. A combination of heterogeneous photocatalysis operating in a fluidised bed reactor is studied in order to increase mass transfer and reduce reaction times. This process uses a manganese dioxide catalyst supported on granular activated carbon with environmentally friendly characteristics. The manganese dioxide composite is prepared by hydrothermal synthesis on carbon Hydrodarco® 3000 with different active phase ratios. The support, the metal oxide, and the composite are characterised by performing Brunauer, Emmett, and Teller analysis, transmission electron microscopy, X-ray diffraction analysis, X-ray fluorescence analysis, UV-Vis spectroscopy by diffuse reflectance, and Fourier transform infrared spectroscopy in order to evaluate the influence of the metal oxide on the activated carbon. A composite of MnO2/GAC (3.78% in phase α-MnO2) is obtained, with a 9.4% increase in the specific surface of the initial GAC and a 12.79 nm crystal size. The effect of pH and catalyst load is studied. At a pH of 9.0 and a dose of 0.9 g L-1, a high degradation of aniline and benzothiazole is obtained, with an 81.63% TOC mineralisation in 64.8 min.
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The Effect of Modifications of Activated Carbon Materials on the Capacitive Performance: Surface, Microstructure, and Wettability. JOURNAL OF COMPOSITES SCIENCE 2021. [DOI: 10.3390/jcs5030066] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this review, the efforts done by different research groups to enhance the performance of the electric double-layer capacitors (EDLCs), regarding the effect of the modification of activated carbon structures on the electrochemical properties, are summarized. Activated carbon materials with various porous textures, surface chemistry, and microstructure have been synthesized using several different techniques by different researchers. Micro-, meso-, and macroporous textures can be obtained through the activation/carbonization process using various activating agents. The surface chemistry of activated carbon materials can be modified via: (i) the carbonization of heteroatom-enriched compounds, (ii) post-treatment of carbon materials with reactive heteroatom sources, and (iii) activated carbon combined both with metal oxide materials dan conducting polymers to obtain composites. Intending to improve the EDLCs performance, the introduction of heteroatoms into an activated carbon matrix and composited activated carbon with either metal oxide materials or conducting polymers introduced a pseudo-capacitance effect, which is an additional contribution to the dominant double-layer capacitance. Such tricks offer high capacitance due to the presence of both electrical double layer charge storage mechanism and faradic charge transfer. The surface modification by attaching suitable heteroatoms such as phosphorus species increases the cell operating voltage, thereby improving the cell performance. To establish a detailed understanding of how one can modify the activated carbon structure regarding its porous textures, the surface chemistry, the wettability, and microstructure enable to enhance the performance of the EDLCs is discussed here in detail. This review discusses the basic key parameters which are considered to evaluate the performance of EDLCs such as cell capacitance, operating voltage, equivalent series resistance, power density, and energy density, and how these are affected by the modification of the activated carbon framework.
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Jiao S, Xue D. High specific capacitance of manganese-based colloidal system with rare earth modification. NANOTECHNOLOGY 2020; 31:424004. [PMID: 32590368 DOI: 10.1088/1361-6528/aba05a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ever-increasing global energy consumption has increased aggregate demand on electrochemical energy storage devices with high energy density. Over the past few decades, manganese oxides have attracted wide attention due to their abundant reserves, low cost, environmental friendliness, and high theoretical capacity. However, most reported manganese-based materials have exhibited capacity far below the theoretical capacity, which was only on the basis of Mn3+/Mn4+ couple. The rich chemistry of manganese enables it to exist in various valence states, such as Mn0, Mn2+, Mn3+, Mn4+, and Mn7+, providing great opportunity for discovering new manganese-based electrode systems. Herein, we formed a Mn2+/Mn4+ couple from a manganese-based colloidal system with rare earth (RE) modification, which was formed in-situ on nickel (Ni) foam in KOH electrolyte under an electric field assistance. The Mn-based colloidal electrode, with Mn:Ce mass ratio of 1:0.5, achieved a high specific capacitance of 2985 F g-1 at 3 A g-1, which was higher than the theoretical capacity of 2193 F g-1 on the basis of the Mn3+/Mn4+ couple. After the addition of Ce3+, the prepared sample exhibited improved rate capability performance. Our manganese-based colloidal electrode with RE modification delivered a high specific capacitance of 1223 F g-1 at 20 A g-1, with 54.5% retention of 2243 F g-1 at 3 A g-1 at Mn:Ce mass ratio of 1:0.05. Colloidal electrode systems involving Mn-based colloids are a novel way to engineer the electrochemical performance of inorganic materials.
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Affiliation(s)
- Shengjian Jiao
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China. University of Science and Technology of China, Hefei 230026, People's Republic of China
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