1
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Bhosale MU, Gujja CS, Asiwal EP, Manjare ST, Pawar SD. Fluorescent MnO 2@DEHP Nanoprobe for Rapid and Selective Detection of Fe(III) ions. J Fluoresc 2024:10.1007/s10895-024-03848-w. [PMID: 39028448 DOI: 10.1007/s10895-024-03848-w] [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: 05/14/2024] [Accepted: 07/15/2024] [Indexed: 07/20/2024]
Abstract
Particle extraction via the liquid-liquid interface (PELLI) method has been utilized to produce Di-(2-ethylhexyl) phosphate (DEHP) coated MnO2 fluorescent nanoprobe denoted as MnO2@DEHP for the selective detection of Fe3+ ions. The synthesized MnO2@DEHP nanoprobe was characterized by various instrumental techniques such as FT-IR, PXRD, TEM, EDAX, HRTEM, DLS, and XPS. Since the high concentration of Fe3+ in waste water leads to water pollution, which in turn affects the ecosystem, and causes severe health hazards. Therefore, accurate detection of Fe3+ ions in the aqueous systems is essential as they are involved in various chemical and biological processes in living things. Here, the synthesized MnO2@DEHP nanoprobe selectively detects Fe3+ ions in the presence of various metal ions in an aqueous media by fluorescence quenching (turn-off) mechanism. The limit of detection (LOD) of MnO2@DEHP nanoprobe for Fe3+ was found to be 0.49 µM. The test-strip method and real water sample analysis were also used to demonstrate the viability of MnO2@DEHP as a fluorescent nanoprobe to detect Fe3+ ions visually and in environment monitoring applications.
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Affiliation(s)
- Mayura U Bhosale
- Department of Chemistry, University of Mumbai, Mumbai, 400098, India
| | | | - Ekta P Asiwal
- Department of Chemistry, University of Mumbai, Mumbai, 400098, India
| | - Sudesh T Manjare
- Department of Chemistry, University of Mumbai, Mumbai, 400098, India
| | - Suresh D Pawar
- Department of Chemistry, University of Mumbai, Mumbai, 400098, India.
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2
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Li J, Chen J, Zeng J, Xie H, Zhou G. Tuning the crystallinity of the MnO x catalysts to promote toluene catalytic oxidation. ENVIRONMENTAL TECHNOLOGY 2024:1-13. [PMID: 38648336 DOI: 10.1080/09593330.2024.2342573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 04/04/2024] [Indexed: 04/25/2024]
Abstract
In this paper, the MnOx catalysts with excellent toluene oxidation performance were prepared by a simple precipitation method. The physicochemical properties of the prepared MnOx catalysts were investigated by XRD, BET, H2-TPR, O2-TPD and XPS. The obtained results revealed that the crystallinity of the prepared MnOx catalysts could be effectively regulated by changing the (NH4)2CO3/Mn(NO3)2 molar ratio, and thus affecting the oxygen vacancy concentration of the prepared MnOx catalysts. The prepared MnOx-4 catalyst with the (NH4)2CO3/Mn(NO3)2 molar ratio of 4.0 had the poor crystallinity and small grain size, which effectively promoted the oxygen defects in the MnOx catalyst to be formed. At the same time, the MnOx-4 catalyst had a large specific surface area, the highest low temperature reducibility and the largest number of oxygen vacancies and surface adsorbed oxygen species, which allowed more surface oxygen species to participate in the redox reaction, and promoted the toluene deep oxidation. Therefore, when the (NH4)2CO3/Mn(NO3)2 molar ratio was 4.0, the prepared MnOx-4 catalyst exhibited an excellent toluene catalytic oxidation performance and robust catalytic stability. What's more, the toluene oxidation conversion on the MnOx-4 catalyst reached 99% at 230°C, and the MnOx-4 catalyst showed excellent resistance to water vapour.
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Affiliation(s)
- Jingyi Li
- Chongqing Key Laboratory of Catalysis and Environmental New Materials, Key Laboratory of Catalysis Science and Technology of Chongqing Education Commission, Department of Chemical Engineering, Chongqing Technology and Business University, Chongqing, People's Republic of China
| | - Jiyan Chen
- Chongqing Key Laboratory of Catalysis and Environmental New Materials, Key Laboratory of Catalysis Science and Technology of Chongqing Education Commission, Department of Chemical Engineering, Chongqing Technology and Business University, Chongqing, People's Republic of China
| | - Jia Zeng
- Chongqing Key Laboratory of Catalysis and Environmental New Materials, Key Laboratory of Catalysis Science and Technology of Chongqing Education Commission, Department of Chemical Engineering, Chongqing Technology and Business University, Chongqing, People's Republic of China
| | - Hongmei Xie
- Chongqing Key Laboratory of Catalysis and Environmental New Materials, Key Laboratory of Catalysis Science and Technology of Chongqing Education Commission, Department of Chemical Engineering, Chongqing Technology and Business University, Chongqing, People's Republic of China
| | - Guilin Zhou
- Chongqing Key Laboratory of Catalysis and Environmental New Materials, Key Laboratory of Catalysis Science and Technology of Chongqing Education Commission, Department of Chemical Engineering, Chongqing Technology and Business University, Chongqing, People's Republic of China
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing, People's Republic of China
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3
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Alharbi SM, Alkhalifah MA, Howchen B, Rahmah ANA, Celorrio V, Fermin DJ. Activating Mn Sites by Ni Replacement in α-MnO 2. ACS MATERIALS AU 2024; 4:74-81. [PMID: 38221925 PMCID: PMC10786130 DOI: 10.1021/acsmaterialsau.3c00051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 09/01/2023] [Accepted: 10/05/2023] [Indexed: 01/16/2024]
Abstract
Transition metal oxides are characterized by an acute structure and composition dependent electrocatalytic activity toward the oxygen evolution (OER) and oxygen reduction (ORR) reactions. For instance, Mn containing oxides are among the most active ORR catalysts, while Ni based compounds tend to show high activity toward the OER in alkaline solutions. In this study, we show that incorporation of Ni into α-MnO2, by adding Ni precursor into the Mn-containing hydrothermal solution, can generate distinctive sites with different electronic configurations and contrasting electrocatalytic activity. The structure and composition of the Ni modified hollandite α-MnO2 phase were investigated by X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), transmission electron microscopy coupled to energy-dispersive X-ray spectroscopy (TEM-EDX), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and X-ray photoelectron spectroscopy (XPS). Our analysis suggests that Mn replacement by Ni into the α-MnO2 lattice (site A) occurs up to approximately 5% of the total Mn content, while further increasing Ni content promotes the nucleation of separate Ni phases (site B). XAS and XRD show that the introduction of sites A and B have a negligible effect on the overall Mn oxidation state and bonding characteristics, while very subtle changes in the XPS spectra appear to suggest changes in the electronic configuration upon Ni incorporation into the α-MnO2 lattice. On the other hand, changes in the electronic structure promoted by site A have a significant impact in the pseudocapacitive responses obtained by cyclic voltammetry in KOH solution at pH 13, revealing the appearance of Mn 3d orbitals at the energy (potential) range relevant to the ORR. The evolution of Mn 3d upon Ni replacement significantly increases the catalytic activity of α-MnO2 toward the ORR. Interestingly, the formation of segregated Ni phases (site B) leads to a decrease in the ORR activity while increasing the OER rate.
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Affiliation(s)
- Sami M. Alharbi
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
- Department
of Chemistry, College of Science, Qassim
University, Buraydah 52571, Saudi Arabia
| | - Mohammed A. Alkhalifah
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
- Department
of Chemistry, College of Science, King Faisal
University, P.O. Box 380, Al-Ahsa, 31982, Saudi Arabia
| | - Benjamin Howchen
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
| | - Athi N. A. Rahmah
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
| | - Veronica Celorrio
- Diamond
Light Source Ltd., Diamond
House, Harwell Campus, Didcot OX11 0DE, U.K.
| | - David J. Fermin
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
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4
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Tharat B, Ngamwongwan L, Seehamongkol T, Rungtaweevoranit B, Nonkumwong J, Suthirakun S, Faungnawakij K, Chanlek N, Plucksacholatarn A, Nimsaila W, Prommin C, Junkaew A. Hydroxy and surface oxygen effects on 5-hydroxymethylfurfural oxidation to 2,5-furandicarboxylic acid on β-MnO 2: DFT, microkinetic and experiment studies. NANOSCALE 2024; 16:678-690. [PMID: 37964613 DOI: 10.1039/d3nr03075j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Manganese dioxide, β-MnO2, has shown potential in catalyzing the oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), a monomer of bioplastic polyethylene furanoate (PEF). Herein, the insight into the hydroxy (OH) and surface oxygen effects on the HMF-to-FDCA reaction over β-MnO2 is clarified through a comprehensive investigation using density functional theory (DFT) calculations, microkinetic modeling, and experiment. Theoretical analyses revealed that both active surface oxygen and OH species (from either base or solvent) facilitate C-H bond breaking and OH insertion, promoting the catalytic activity of β-MnO2. Microkinetic modeling demonstrated that the FFCA-to-FDCA and DFF-to-FFCA steps are the rate-limiting steps of the hydroxylated and non-hydroxylated surfaces, respectively. These theoretical results agree well with the experiment when water and dimethyl sulfoxide (DMSO) were used as solvents. In addition, the synthesized β-MnO2 catalyst showed high stability and activity, maintaining stable HMF conversion (≥99 mol%) and high FDCA yield (85-92 mol%) during continuous flow oxidation for 72 hours at pO2 of 1 MPa, 393 K and LHSV of 1 h-1. Thus, considering both hydroxy and surface oxygen species is a new strategy for enhancing the catalytic activity of Mn oxides and other metal oxide catalysts for the HMF-to-FDCA reaction.
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Affiliation(s)
- Bunrat Tharat
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand 30000.
| | - Lappawat Ngamwongwan
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand 30000.
| | - Theerada Seehamongkol
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, Thailand 12120.
| | - Bunyarat Rungtaweevoranit
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, Thailand 12120.
| | - Jeeranan Nonkumwong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, Thailand 12120.
| | - Suwit Suthirakun
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand 30000.
| | - Kajornsak Faungnawakij
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, Thailand 12120.
| | - Narong Chanlek
- Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima, 30000, Thailand
| | - Aunyamanee Plucksacholatarn
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, Thailand 12120.
| | - Weerawan Nimsaila
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, Thailand 12120.
| | - Chanatkran Prommin
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand 30000.
| | - Anchalee Junkaew
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, Thailand 12120.
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5
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Tian H, Li R, Miao J, Liu S, Wang F, Zheng Z. Additive-free selective oxidation of aromatic alcohols with molecular oxygen catalyzed by a mixed-valence polyoxovanadate-based metal-organic framework. Dalton Trans 2023. [PMID: 37340820 DOI: 10.1039/d3dt01403g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Selective oxidation of alcohols to aldehydes is an industrially significant chemical transformation. Herein, we report a mixed-valence polyoxovanadate-based metal-organic framework (MOF), (H2bix)5{[Cd(bix)2][VIV8VV7O36Cl]2}·3H2O (V-Cd-MOF), for catalyzing the additive-free oxidation of a series of aromatic alcohols with high selectivity and in nearly quantitative yield to the corresponding aldehydes with O2 as the oxidant. Experimental results, corroborated with density functional theory calculations, indicate that it is the synergistic operation of the dual active sites of the VIV-O-VV building units in the polyoxovanadate cluster that is responsible for the excellent catalytic performance observed: on the one hand, the exposed and readily accessible reduced VIV site is believed to activate O2, resulting in a reactive oxygen species for the subsequent activation and breaking of the substrate's Cα-H bond. On the other hand, the VV site coordinates with the alcoholic O atom to facilitate the cleavage of the O-H bond. The catalyst can be recycled by centrifugation and re-used at least five times with uncompromised performance. To our knowledge, V-Cd-MOF represents the first example of a polyoxometalate-based MOF catalyst for additive-free selective oxidation of alcohol to aldehyde with O2 as an oxidant.
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Affiliation(s)
- Hongrui Tian
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.
| | - Runhan Li
- School of Chemistry, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Jun Miao
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.
| | - Shuxia Liu
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, College of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun, Jilin 130024, P. R. China
| | - Fengfeng Wang
- National Institutes for Food and Drug Control, 31 Huatuo Road, Daxing District, Beijing, 102600, China
| | - Zhiping Zheng
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.
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6
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Pan Y, Jiawei W, Haifeng W, Song W, Chunyuan Y, Yue H. Physicochemical properties of different crystal forms of manganese dioxide prepared by a liquid phase method and their quantitative evaluation in capacitor and battery materials. NANOSCALE ADVANCES 2023; 5:3396-3413. [PMID: 37325526 PMCID: PMC10262996 DOI: 10.1039/d3na00144j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/05/2023] [Indexed: 06/17/2023]
Abstract
Although there are many studies on the preparation and electrochemical properties of the different crystal forms of manganese dioxide, there are few studies on their preparation by a liquid phase method and the influence of their physical and chemical properties on their electrochemical performance. In this paper, five crystal forms of manganese dioxide were prepared by using manganese sulfate as a manganese source and the difference of their physical and chemical properties was studied by phase morphology, specific surface area, pore size, pore volume, particle size and surface structure. The different crystal forms of manganese dioxide were prepared as electrode materials, and their specific capacitance composition was obtained by performing CV and EIS in a three-electrode system, introducing kinetic calculation and analyzing the principle of electrolyte ions in the electrode reaction process. The results show that δ-MnO2 has the largest specific capacitance due to its layered crystal structure, large specific surface area, abundant structural oxygen vacancies and interlayer bound water, and its capacity is mainly controlled by capacitance. Although the tunnel of the γ-MnO2 crystal structure is small, its large specific surface area, large pore volume and small particle size make it have a specific capacitance that is only inferior to δ-MnO2, and the diffusion contribution in the capacity accounts for nearly half, indicating it also has the characteristics of battery materials. α-MnO2 has a larger crystal tunnel structure, but its capacity is lower due to the smaller specific surface area and less structural oxygen vacancies. ε-MnO2 has a lower specific capacitance is not only the same disadvantage as α-MnO2, but also the disorder of its crystal structure. The tunnel size of β-MnO2 is not conducive to the interpenetration of electrolyte ions, but its high oxygen vacancy concentration makes its contribution of capacitance control obvious. EIS data shows that δ-MnO2 has the smallest charge transfer impedance and bulk diffusion impedance, while the two impedances of γ-MnO2 were the largest, which shows that its capacity performance has great potential for improvement. Combined with the calculation of electrode reaction kinetics and the performance test of five crystal capacitors and batteries, it is shown that δ-MnO2 is more suitable for capacitors and γ-MnO2 is more suitable for batteries.
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Affiliation(s)
- Yang Pan
- College of Materials and Metallurgy, Guizhou University Guiyang 550025 China
- Guizhou Key Laboratory of Metallurgical Engineering and Process Energy Conservation Guiyang 550025 China
| | - Wang Jiawei
- College of Materials and Metallurgy, Guizhou University Guiyang 550025 China
- Engineering Technology and Research Center of Manganese Material for Battery Tongren 554300 China
- Guizhou Key Laboratory of Metallurgical Engineering and Process Energy Conservation Guiyang 550025 China
| | - Wang Haifeng
- College of Materials and Metallurgy, Guizhou University Guiyang 550025 China
- Engineering Technology and Research Center of Manganese Material for Battery Tongren 554300 China
- Guizhou Key Laboratory of Metallurgical Engineering and Process Energy Conservation Guiyang 550025 China
| | - Wang Song
- College of Materials and Metallurgy, Guizhou University Guiyang 550025 China
- Guizhou Key Laboratory of Metallurgical Engineering and Process Energy Conservation Guiyang 550025 China
| | - Yang Chunyuan
- College of Materials and Metallurgy, Guizhou University Guiyang 550025 China
- Guizhou Key Laboratory of Metallurgical Engineering and Process Energy Conservation Guiyang 550025 China
| | - He Yue
- College of Materials and Metallurgy, Guizhou University Guiyang 550025 China
- Guizhou Key Laboratory of Metallurgical Engineering and Process Energy Conservation Guiyang 550025 China
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7
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Tan B, Huo Z, Sun L, Ren L, Zhao P, Feng N, Wan H, Guan G. Ionic liquid-modulated synthesis of MnO2 nanowires for promoting propane combustion: Microstructure engineering and regulation mechanism. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Li Y, Liao Q, Ling W, Ye F, Liu F, Zhang X, He J, Cheng G. Pd/δ-MnO2 nanoflower arrays cordierite monolithic catalyst toward toluene and o-xylene combustion. Front Chem 2022; 10:978428. [PMID: 36311428 PMCID: PMC9606343 DOI: 10.3389/fchem.2022.978428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 09/29/2022] [Indexed: 11/13/2022] Open
Abstract
Exploring high-efficiency and stable monolithic structured catalysts is vital for catalytic combustion of volatile organic compounds. Herein, we prepared a series of Pd/δ-MnO2 nanoflower arrays monolithic integrated catalysts (0.01–0.07 wt% theoretical Pd loading) via the hydrothermal growth of δ-MnO2 nanoflowers onto the honeycomb cordierite, which subsequently served as the carrier for loading the Pd nanoparticles (NPs) through the electroless plating route. Moreover, we characterized the resulting monolithic integrated catalysts in detail and evaluated their catalytic activities for toluene combustion, in comparison to the controlled samples including only Pd NPs loading and the δ-MnO2 nanoflower arrays. Amongst all the monolithic samples, the Pd/δ-MnO2 nanoflower arrays monolithic catalyst with 0.05 wt% theoretical Pd loading delivered the best catalytic performance, reaching 90% toluene conversion at 221°C at a gas hourly space velocity (GHSV) of 10,000 h−1. Moreover, this sample displayed superior catalytic activity for o-xylene combustion under a GHSV of 10,000 h−1. The monolithic sample with optimal catalytic activity also displayed excellent catalytic stability after 30 h constant reaction at 210 and 221°C.
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Affiliation(s)
- Yongfeng Li
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, China
| | - Qianyan Liao
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Weizhao Ling
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Fan Ye
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Fangfang Liu
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Xipeng Zhang
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Jiajun He
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Gao Cheng
- Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, China
- *Correspondence: Gao Cheng,
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9
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Xu J, Zhang T, Fang S, Wu Z, Gao E, Zhu J, Yao S, Li J, Dai L, Liu W, Zhang B, Zhang J. Revealing the significant differences of CO plasma oxidation on β-MnO2 catalyst in in- and post-plasma catalysis configurations using operando DRIFTS-MS. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Xie S, Li X, Li Y, Liang Q, Dong L. Material Design and Energy Storage Mechanism of Mn-Based Cathodes for Aqueous Zinc-Ion Batteries. CHEM REC 2022; 22:e202200201. [PMID: 36126168 DOI: 10.1002/tcr.202200201] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/03/2022] [Indexed: 11/06/2022]
Abstract
Mn-based cathodes have been widely explored for aqueous zinc-ion batteries (ZIBs), by virtue of their high theoretical capacity and low cost. However, Mn-based cathodes suffer from poor rate capability and cycling performance. Researchers have presented various approaches to address these issues. Therefore, these endeavors scattered in various directions (e. g., designing electrode structures, defect engineering and optimizing electrolytes) are necessary to be connected through a systematic review. Hence, we comprehensively overview Mn-based cathode materials for ZIBs from the aspects of phase compositions, electrochemical behaviors and energy storage mechanisms, and try to build internal relations between these factors. Modification strategies of Mn-based cathodes are then introduced. Furthermore, this review also provides some new perspectives on future efforts toward high-energy and long-life Mn-based cathodes for ZIBs.
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Affiliation(s)
- Shiyin Xie
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, China
| | - Xu Li
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, China
| | - Yang Li
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, China
| | - Qinghua Liang
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - Liubing Dong
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, China
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11
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Li Z, Zhao L, Li B, Bian S, Wang J, Zhang H, Zhao C. Base metal catalyzed oxidation of 5-hydroxy-methyl-furfural to 2,5-furan-dicarboxylic acid: A review. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Xu J, Zhang T, Fang S, Li J, Wu Z, Wang W, Zhu J, Gao E, Yao S. Exploring the roles of oxygen species in H 2 oxidation at β-MnO 2 surfaces using operando DRIFTS-MS. Commun Chem 2022; 5:97. [PMID: 36697951 PMCID: PMC9814464 DOI: 10.1038/s42004-022-00717-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 08/08/2022] [Indexed: 01/28/2023] Open
Abstract
Understanding of the roles of oxygen species at reducible metal oxide surfaces under real oxidation conditions is important to improve the performance of these catalysts. The present study addresses this issue by applying a combination of operando diffuse reflectance infrared Fourier transform spectroscopy with a temperature-programmed reaction cell and mass spectrometry to explore the behaviors of oxygen species during H2 oxidation in a temperature range of 25-400 °C at β-MnO2 surfaces. It is revealed that O2 is dissociated simultaneously into terminal-type oxygen (M2+-O2-) and bridge-type oxygen (M+-O2--M+) via adsorption at the Mn cation with an oxygen vacancy. O2 adsorption is inhibited if the Mn cation is covered with terminal-adsorbed species (O, OH, or H2O). In a temperature range of 110-150 °C, OH at Mn cation becomes reactive and its reaction product (H2O) can desorb from the Mn cation, resulting in the formation of bare Mn cation for O2 adsorption and dissociation. At a temperature above 150 °C, OH is reactive enough to leave bare Mn cation for O2 adsorption and dissociation. These results suggest that bare metal cations with oxygen vacancies are important to improve the performance of reducible metal oxide catalysts.
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Affiliation(s)
- Jiacheng Xu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
- School of Material Science and Engineering, Changzhou University, Changzhou, China
| | - Tiantian Zhang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
| | - Shiyu Fang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
| | - Jing Li
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
- Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou, China
| | - Zuliang Wu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
- Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou, China
| | - Wei Wang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
- Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou, China
| | - Jiali Zhu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
- Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou, China
| | - Erhao Gao
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China
- Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou, China
| | - Shuiliang Yao
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, China.
- School of Material Science and Engineering, Changzhou University, Changzhou, China.
- Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou, China.
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13
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Koutani M, Hayashi E, Kamata K, Hara M. Synthesis and Aerobic Oxidation Catalysis of Mesoporous Todorokite-Type Manganese Oxide Nanoparticles by Crystallization of Precursors. J Am Chem Soc 2022; 144:14090-14100. [PMID: 35860845 DOI: 10.1021/jacs.2c02308] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The pursuit of a high surface area while maintaining high catalytic performance remains a challenge due to a trade-off relationship between these two features in some cases. In this study, mesoporous todorokite-type manganese oxide (OMS-1) nanoparticles with high specific surface areas were synthesized in one step by a new synthesis approach involving crystallization (i.e., solid-state transformation) of a precursor produced by a redox reaction between MnO4- and Mn2+ reagents. The use of a low-crystallinity precursor with small particles is essential to achieve this solid-state transformation into OMS-1 nanoparticles. The specific surface area reached up to ca. 250 m2 g-1, which is much larger than those (13-185 m2 g-1) for Mg-OMS-1 synthesized by previously reported methods including multistep synthesis or dissolution/precipitation processes. Despite ultrasmall nanoparticles, a linear correlation between the catalytic reaction rates of OMS-1 and the surface areas was observed without a trade-off relationship between particle size and catalytic performance. These OMS-1 nanoparticles exhibited the highest catalytic activity among the Mn-based catalysts tested for the oxidation of benzyl alcohol and thioanisole with molecular oxygen (O2) as the sole oxidant, including highly active β-MnO2 nanoparticles. The present OMS-1 nanomaterial could also act as a recyclable heterogeneous catalyst for the aerobic oxidation of various aromatic alcohols and sulfides under mild reaction conditions. The mechanistic studies showed that alcohol oxidation proceeds with oxygen species caused by the solid, and the high surface area of OMS-1 significantly contributes to an enhancement of the catalytic activity for aerobic oxidation.
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Affiliation(s)
- Maki Koutani
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Eri Hayashi
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
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14
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Yamaguchi K, Jin X, Yatabe T, Suzuki K. Development of Environmentally Friendly Dehydrogenative Oxidation Reactions Using Multifunctional Heterogeneous Catalysts. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Xiongjie Jin
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Takafumi Yatabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Kosuke Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
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15
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Totaro G, Sisti L, Marchese P, Colonna M, Romano A, Gioia C, Vannini M, Celli A. Current Advances in the Sustainable Conversion of 5-Hydroxymethylfurfural into 2,5-Furandicarboxylic Acid. CHEMSUSCHEM 2022; 15:e202200501. [PMID: 35438242 PMCID: PMC9400982 DOI: 10.1002/cssc.202200501] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/15/2022] [Indexed: 06/14/2023]
Abstract
2,5-Furandicarboxylic acid (FDCA) is currently considered one of the most relevant bio-sourced building blocks, representing a fully sustainable competitor for terephthalic acid as well as the main component in green polymers such as poly(ethylene 2,5-furandicarboxylate) (PEF). The oxidation of biobased 5-hydroxymethylfurfural (HMF) represents the most straightforward approach to obtain FDCA, thus attracting the attention of both academia and industries, as testified by Avantium with the creation of a new plant expected to produce 5000 tons per year. Several approaches allow the oxidation of HMF to FDCA. Metal-mediated homogeneous and heterogeneous catalysis, metal-free catalysis, electrochemical approaches, light-mediated procedures, as well as biocatalytic processes share the target to achieve FDCA in high yield and mild conditions. This Review aims to give an up-to-date overview of the current developments in the main synthetic pathways to obtain FDCA from HMF, with a specific focus on process sustainability.
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Affiliation(s)
- Grazia Totaro
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
| | - Laura Sisti
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
| | - Paola Marchese
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
| | - Martino Colonna
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
| | - Angela Romano
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
| | - Claudio Gioia
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
| | - Micaela Vannini
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
| | - Annamaria Celli
- Department of CivilChemical Environmental and Materials EngineeringUniversity of BolognaVia Terracini 2840131BolognaItaly
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16
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Tian FX, Li H, Zhu M, Tu W, Lin D, Han YF. Effect of MnO 2 Polymorphs' Structure on Low-Temperature Catalytic Oxidation: Crystalline Controlled Oxygen Vacancy Formation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:18525-18538. [PMID: 35418231 DOI: 10.1021/acsami.2c01727] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
MnO2 polymorphs (α-, β-, and ε-MnO2) were synthesized, and their chemical/physical properties for CO oxidation were systematically studied using multiple techniques. Density functional theory (DFT) calculations and temperature-programmed experiments reveal that β-MnO2 shows low energies for oxygen vacancy generation and excellent redox properties, exhibiting significant CO oxidation activity (T90 = 75 °C) and stability even under a humid atmosphere. For the first time, we report that the specific reaction rate for β-MnO2 (0.135 moleculeCO·nm-2·s-1 at 90 °C) is roughly approximately 4 and 17 times higher than that of ε-MnO2 and α-MnO2, respectively. The specific reaction rate order (β-MnO2 > ε-MnO2 > α-MnO2) is not only in good agreement with reduction rates (CO-TPSR measurements) but also agrees with the DFT calculation. In combination with in situ spectra and intrinsic kinetic studies, the mechanisms of CO oxidation over various crystal structures of MnO2 were proposed as well. We believe the new insights from this study will largely inspire the design of such a kind of catalyst.
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Affiliation(s)
- Fei-Xiang Tian
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hu Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Minghui Zhu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Weifeng Tu
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education, Zhengzhou University, Zhengzhou 450001, China
| | - Dehai Lin
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education, Zhengzhou University, Zhengzhou 450001, China
| | - Yi-Fan Han
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education, Zhengzhou University, Zhengzhou 450001, China
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17
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Hussain MZ, Khan S. Fabrication and tribological behavior of MnO 2/epoxy nanocomposites. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221079510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tribology is the study of moving surfaces, and it has a variety of effects on our lives. From an economic point of view, wear is one of the most important aspects of an industry’s viability. Parts of the machine can wear out, and they need to be replaced. This is especially important for polymer-based materials. Therefore, it is important to reduce maintenance costs and improve machine reliability in a variety of engineering applications through proper material selection. The present investigation deals with the fabrication of manganese dioxide (MnO2)/epoxy nanocomposite and investigates its tribological properties. The MnO2/epoxy nanocomposites were fabricated via a solution mixing technique. The phase identification and surface morphology of the sample was examined by X-ray diffractometer and field emission scanning electron microscope, respectively. The mass density, micro-hardness, and specific wear rate data of samples revealed that the mass density, micro-hardness, and wear resistance of the samples increased with the addition of MnO2 in the epoxy matrix. The nanocomposite sample containing 0.5 wt. % MnO2 loading in the epoxy matrix shows higher density, micro-hardness, and wear resistance compared to other samples. The result also shows that with the addition of MnO2 in the epoxy matrix, the coefficient of friction of the samples is increased. The percentage reduction in specific wear rate due to the addition of 0.5 wt. % MnO2 in neat epoxy is 68.10%, whereas the percentage increase in the coefficient of friction is 19.30%. The results of the analysis of variance show the effect of adding wt. % of MnO2 in the epoxy matrix is significant in the tribological responses. The worn surface analysis shows that the fatigue wear mode seems to be the dominating mode of wear for all samples as compared to the other modes of wear. The properties of MnO2/epoxy nanocomposite data revealed that the developed material may be used in the automotive industry as a structural material, fabrication of snow sled, ball bearing housing, or plastic gear materials with adequate lubrication.
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Affiliation(s)
- Md Z Hussain
- Department of Mechanical Engineering, Jamia Millia Islamia, New Delhi, India
| | - Sabah Khan
- Department of Mechanical Engineering, Jamia Millia Islamia, New Delhi, India
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18
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Hayashi E, Tamura T, Aihara T, Kamata K, Hara M. Base-Assisted Aerobic C-H Oxidation of Alkylarenes with a Murdochite-Type Oxide Mg 6MnO 8 Nanoparticle Catalyst. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6528-6537. [PMID: 35080862 DOI: 10.1021/acsami.1c20080] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Heterogeneously catalyzed aerobic oxidative C-H functionalization under mild conditions is a chemical process to obtain desired oxygenated products directly. Nanosized murdochite-type oxide Mg6MnO8 (Mg6MnO8-MA) was successfully synthesized by the sol-gel method using malic acid. The specific surface area reached up to 104 m2 g-1, which is about 7 times higher than those (2-15 m2 g-1) of Mg6MnO8 synthesized by previously reported methods. Mg6MnO8-MA exhibited superior catalytic performance to those of other Mn- and Mg-based oxides, including manganese oxides with Mn-O-Mn active sites for the oxidation of fluorene with molecular oxygen (O2) as the sole oxidant under mild conditions (40 °C). The present catalytic system was applicable to the aerobic oxidation of various substrates. The catalyst could be recovered by simple filtration and reused several times without obvious loss of its high catalytic performance. The correlation between the reactivity and the pKa of the substrates, basic properties of catalysts, and kinetic isotope effects suggest a basicity-controlled mechanism of hydrogen atom transfer. The 18O-labeling experiments, kinetics, and mechanistic studies showed that H abstraction of the hydrocarbon proceeds via a mechanism involving O2 activation. The structure of Mg6MnO8 consisting of isolated Mn4+ species located in a basic MgO matrix plays an important role in the present oxidation.
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Affiliation(s)
- Eri Hayashi
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - Takatoshi Tamura
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - Takeshi Aihara
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
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19
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Selvakumar K, Duraisamy V, Venkateshwaran S, Arumugam N, Almansour AI, Wang Y, Xiaoteng Liu T, Murugesan Senthil Kumar S. Development of α‐MnO
2
Nanowire with Ni‐ and (Ni, Co)‐Cation Doping as an Efficient Bifunctional Oxygen Evolution and Oxygen Reduction Reaction Catalyst. ChemElectroChem 2022. [DOI: 10.1002/celc.202101303] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Karuppiah Selvakumar
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
| | - Velu Duraisamy
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Selvaraj Venkateshwaran
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Natarajan Arumugam
- Department of Chemistry, College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia
| | - Abdulrahman I. Almansour
- Department of Chemistry, College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia
| | - Yucheng Wang
- Faculty of Engineering and Environment Northumbria University Newcastle Upon Tyne NE1 8ST United Kingdom
| | - Terence Xiaoteng Liu
- Faculty of Engineering and Environment Northumbria University Newcastle Upon Tyne NE1 8ST United Kingdom
| | - Sakkarapalayam Murugesan Senthil Kumar
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
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20
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Azizi N, Farzaneh F, Habibnejad N. Recyclable Magnetic Camphor Sulfonic Acid: A Reliable and Highly Efficient Ionic Organocatalyst for Benzothiazin-4-One Synthesis in Green Media. Catal Letters 2022. [DOI: 10.1007/s10562-021-03885-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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21
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Li ZR, Zhang XH, Du YY, Han GZ. Urchin-like hollow SiO 2@γ-MnO 2 microparticles for the rapid degradation of organic dyes. RSC Adv 2022; 12:1728-1737. [PMID: 35425158 PMCID: PMC8979116 DOI: 10.1039/d1ra06490h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 12/13/2021] [Indexed: 11/23/2022] Open
Abstract
In this paper, using hollow silica microspheres as carriers, we developed a facile one-pot method for the preparation of hollow SiO2@MnO2 composite microparticles. Under a certain proportion of hollow silica microspheres and manganese salt, a novel kind of hollow urchin-like SiO2@γ-MnO2 microparticles was obtained. The structure and morphology of the composite microparticles were characterized by XRD, SEM and TEM. On this basis, using rhodamine B and methyl orange as model molecules, the oxidative degradation ability of the hollow SiO2@γ-MnO2 microparticles for organic dyes in water was investigated through UV-vis analysis technology. The urchin-like SiO2@γ-MnO2 microparticles showed excellent performance for the rapid oxidative degradation of organic dyes under acidic conditions. This study indicated that γ-MnO2 loaded on hollow materials can be used as an efficient tool for treating organic dye wastewater, and shows broad application prospects for solving environmental problems in the related industry. In this paper, using hollow silica microspheres as carrier, we developed a facile method for preparation of a novel kind of hollow urchin-like SiO2@γ-MnO2 microparticles with excellent performance for rapid oxidation degradation of organic dyes.![]()
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Affiliation(s)
- Zhuo-Rui Li
- College of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Xiao-Hui Zhang
- College of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Yue-Yue Du
- College of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Guo-Zhi Han
- College of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
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22
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Kamata K, Kinoshita N, Koutani M, Aono R, Hayashi E, Hara M. β-MnO 2 nanoparticles as heterogenous catalysts for aerobic oxidative transformation of alcohols to carbonyl compounds, nitriles, and amides. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01476a] [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
β-MnO2 nanoparticles exhibit high catalytic performance for the aerobic oxidation of various aromatic, allylic, and heteroaromatic alcohols and one-pot tandem oxidation of alcohols to nitriles and amides in the presence of NH3.
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Affiliation(s)
- Keigo Kamata
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-City, Kanagawa, 226-8503, Japan
| | - Nanami Kinoshita
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-City, Kanagawa, 226-8503, Japan
| | - Maki Koutani
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-City, Kanagawa, 226-8503, Japan
| | - Ryusei Aono
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-City, Kanagawa, 226-8503, Japan
| | - Eri Hayashi
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-City, Kanagawa, 226-8503, Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-City, Kanagawa, 226-8503, Japan
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23
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Ma M, Zhu Q, Jiang Z, Jian Y, Chen C, Liu Q, He C. Achieving toluene efficient mineralization over K/ɑ-MnO 2via oxygen vacancy modulation. J Colloid Interface Sci 2021; 598:238-249. [PMID: 33901849 DOI: 10.1016/j.jcis.2021.04.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/30/2021] [Accepted: 04/09/2021] [Indexed: 01/30/2023]
Abstract
Oxygen vacancy plays an important role in adsorption and activation of oxygen species and therefore promotes the catalytic performance of materials in heterogeneous oxidation reactions. Here, a series of K-doped ɑ-MnO2 materials with different K loadings were synthesized by a reproducible post processing process. Results show that the presence of K+ enhances the reducibility and oxygen vacancy concentration of ɑ-MnO2 due to the break of charge balance and the formation of low valence Mn species. 4-K/MnO2 material exhibits the highest toluene oxidation activity and satisfied long-term stability and water resistance owing to its superior reducibility and abundant surface absorbed oxygen (Oads). In situ DRIFTS demonstrate that Oads greatly accelerates toluene dehydrogenation rate and promotes benzoate formation, enhancing the activation and decomposition of toluene molecules. Moreover, the CC cleavage of benzene ring (forming maleic anhydride) is the rate-determining step of toluene oxidation, which can be easily occurred over 4-K/MnO2.
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Affiliation(s)
- Mudi Ma
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Qing Zhu
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Zeyu Jiang
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Yanfei Jian
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Changwei Chen
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Qiyuan Liu
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
| | - Chi He
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China.
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24
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Sohal N, Maity B, Basu S. Morphology-Dependent Performance of MnO 2 Nanostructure-Carbon Dot-Based Biosensors for the Detection of Glutathione. ACS APPLIED BIO MATERIALS 2021; 4:5158-5168. [PMID: 35006999 DOI: 10.1021/acsabm.1c00353] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Herein, we develop a facile, sensitive, and selective fluorescent nanosensor for the detection of glutathione (GSH). In this protocol, carbon dots (Cdots) with a fairly high quantum yield were synthesized by a microwave-assisted pyrolysis technique. Moreover, different shapes of the MnO2 nanostructure were also prepared by the hydrothermal technique. A comparative photophysical study of different morphology-dependent Cdots@MnO2 nanostructure-based biosensors was explored, which showed different results for the quenching values of ("turn-off") fluorescence intensity, quantum yields, electron transfer rate, and average lifetime. The structure, property, and performance of nanomaterials are interdependent. Therefore, the different shapes of MnO2, that is, nanoflowers (NFs), nanorods (NRs), and a mixture of NFs/NRs was prepared by the hydrothermal method owing to different specific surface areas (23-69 m2 g-1) which put the impact on their sensing activity. It was observed that the variation in the different photophysical parameters of fluorescent Cdots such as quantum yield (Φ), average lifetime values [τav (ns)], radiative (kr) rate constant, nonradiative (knr) rate constant, rate of electron transfer (kET), the efficiency of electron transfer (ΦEET), FRET efficiency (E), and Förster distance (R0) were dependent on the different shapes of the MnO2 nanostructure. These results indicate that the transfer of energy occurs between the Cdots and different shapes of MnO2 nanostructures based on fluorescence resonance energy transfer at different charge-transfer rates. The recovery rate ("turn-on") of fluorescence of Cdots with the addition of GSH was obtained best for the NF structure by conversion of MnO2 to Mn2+, and the limit of detection was obtained as ∼19 μM for GSH. The developed sensing probes were rapid, easy, cheap, and eco-friendly for the determination of GSH.
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Affiliation(s)
- Neeraj Sohal
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala 147004, India
| | - Banibrata Maity
- School of Chemistry and Biochemistry, Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala 147004, India
| | - Soumen Basu
- School of Chemistry and Biochemistry, Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala 147004, India
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25
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Matsuda A, Tateno H, Kamata K, Hara M. Iron phosphate nanoparticle catalyst for direct oxidation of methane into formaldehyde: effect of surface redox and acid–base properties. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01265g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The surface redox and the weakly basic properties of FePO4 nanoparticles would contribute to the selective CH4 oxidation to HCHO and the suppression of over-oxidation, respectively.
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Affiliation(s)
- Aoi Matsuda
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Haruka Tateno
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
- JST, Core Research for Evolutional Science and Technology (CREST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
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26
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Shibata S, Kamata K, Hara M. Aerobic oxidative CC bond cleavage of aromatic alkenes by a high valency iron-containing perovskite catalyst. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00245g] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
High-valency iron-containing perovskite catalyst BaFeO3−δ could efficiently promote the additive-free oxidative CC bond cleavage of various aromatic alkenes using O2 as the sole oxidant.
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Affiliation(s)
- Satomi Shibata
- Laboratory for Materials and Structures
- Institute of Innovative Research
- Tokyo Institute of Technology
- Yokohama-city
- Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures
- Institute of Innovative Research
- Tokyo Institute of Technology
- Yokohama-city
- Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures
- Institute of Innovative Research
- Tokyo Institute of Technology
- Yokohama-city
- Japan
| |
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