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Zhao L, Ding J, Liu J, Yang Y. Study on the mechanism of acid treatment La 0.8Sr 0.2Mn 0.8Cu 0.2O 3 to improve the catalytic activity of formaldehyde at low temperature. Environ Sci Pollut Res Int 2024; 31:1456-1467. [PMID: 38040885 DOI: 10.1007/s11356-023-31268-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 11/23/2023] [Indexed: 12/03/2023]
Abstract
To address the issue of surface enrichment of A-site ions in perovskite and the resulting suppression of catalytic activity, the La0.8Sr0.2Mn0.8Cu0.2O3 was modified by treatment with dilute nitric acid (2 mol/L) and dilute acetic acid (2 mol/L). The results show that the effect of dilute nitric acid treatment on the morphology and catalytic activity of the catalyst is more significant. The specific surface area of the catalyst after dilute nitric acid treatment (268.78 m2/g) is seven times higher than before treatment (37.55 m2/g). The low-temperature catalytic oxidation activity of HCHO of the catalyst after dilute nitric acid treatment is significantly improved, achieving a 50% HCHO oxidation efficiency at 80 °C, while the original sample requires 127 °C to achieve a 50% HCHO conversion. The excellent catalytic activity of the catalyst after dilute nitric acid treatment is related to its large specific surface area, high surface-active site density, and abundant Mn4+ ions. Stability and water resistance experiments show that the catalyst after dilute nitric acid treatment has excellent reaction stability and good water resistance ability. The mechanism of the formaldehyde oxidation reaction is that formaldehyde is first oxidized to a dioxymethylene (DOM) intermediate and DOM dehydrogenation reaction is responsible for the formation of formate species (HCOO-).
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Affiliation(s)
- Liming Zhao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Junyan Ding
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jing Liu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Yingju Yang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
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Roozbahani H, Maghsoodi S, Raei B, Kootenaei AS, Azizi Z. Effects of catalyst preparation methods on the performance of La2MMnO6 (M=Co, Ni) double perovskites in catalytic combustion of propane. KOREAN J CHEM ENG. [DOI: 10.1007/s11814-021-0930-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pérez-hernández C, Sánchez-zeferino R, Salazar-kuri U, Álvarez-ramos M. Fabrication, structural properties, and tunable light emission of Sm3+, Tb3+ co-doped SrSnO3 perovskite nanoparticles. Chem Phys 2021; 551:111324. [DOI: 10.1016/j.chemphys.2021.111324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Affiliation(s)
- Xinyu Mao
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Chao Lin
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - George W. Graham
- Department of Materials Science and Engineering, University of California Irvine, Irvine, California 92697, United States
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Raymond J. Gorte
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Widenmeyer M, Kohler T, Samolis M, Denko ATD, Xiao X, Xie W, Osterloh FE, Weidenkaff A. Band Gap Adjustment in Perovskite-type Eu1−x
Ca
x
TiO3 via Ammonolysis. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2019-1429] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Abstract
Perovskite-type oxynitrides AB(O,N)3 are potential candidates for photoelectrode materials in solar water splitting. A drawback of these materials is their low sintering tendency resulting in low electrical conductivities. Typically, they are prepared by ammonia treatment of insulating, wide band gap oxides. In this study, we propose an approach starting from small band gap oxides Eu1−x
Ca
x
TiO3−
δ
and then widen the band gaps in a controlled way by ammonolysis and partial Ca2+ substitution. Both together induced a distortion of the octahedral network and dilution of the Eu4f and N2p levels in the valence band. The effect is the stronger the more Ca2+ is present. Within the series of samples, Eu0.4Ca0.6Ti(O,N)3 had the most suitable optical band gap (EG
≈ 2.2 eV) for water oxidation. However, its higher Eu content compared to Eu0.1Ca0.9Ti(O,N)3 slowed down the charge carrier dynamics due to enhanced trapping and recombination as expressed by large accumulation (τ
on) and decay (τ
off) times of the photovoltage of up to 109 s and 486 s, respectively. In contrast, the highly Ca2+-substituted samples (x ≥ 0.7) were more prone to formation of TiN and oxygen vacancies also leading to Ti3+ donor levels below the conduction band. Therefore, a precise control of the ammonolysis temperature is essential, since even small amounts of TiN can suppress the photovoltage generation by fast recombination processes. Water oxidation tests on Eu0.4Ca0.6Ti(O,N)3 revealed a formation of 7.5 μmol O2 from 50 mg powder together with significant photocorrosion of the bare material. Combining crystal structure, chemical composition, and optical and electronical band gap data, a first simplified model of the electronical band structure of Eu1−x
Ca
x
Ti(O,N)3 could be proposed.
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Affiliation(s)
- Marc Widenmeyer
- University of Stuttgart, Institute for Materials Science , Heisenbergstr. 3 , 70569 Stuttgart , Germany
- Technische Universität Darmstadt, Institute of Materials Science , Alarich-Weiss-Str. 2 , 64287 Darmstadt , Germany
| | - Tobias Kohler
- University of Stuttgart, Institute for Materials Science , Heisenbergstr. 3 , 70569 Stuttgart , Germany
| | - Margarita Samolis
- University of Stuttgart, Institute for Materials Science , Heisenbergstr. 3 , 70569 Stuttgart , Germany
| | - Alexandra T. De Denko
- University of California , Department of Chemistry , One Shields Avenue , Davis, CA, 95616 , USA
| | - Xingxing Xiao
- University of Stuttgart, Institute for Materials Science , Heisenbergstr. 3 , 70569 Stuttgart , Germany
- Technische Universität Darmstadt, Institute of Materials Science , Alarich-Weiss-Str. 2 , 64287 Darmstadt , Germany
| | - Wenjie Xie
- University of Stuttgart, Institute for Materials Science , Heisenbergstr. 3 , 70569 Stuttgart , Germany
- Technische Universität Darmstadt, Institute of Materials Science , Alarich-Weiss-Str. 2 , 64287 Darmstadt , Germany
| | - Frank E. Osterloh
- University of California , Department of Chemistry , One Shields Avenue , Davis, CA, 95616 , USA
| | - Anke Weidenkaff
- University of Stuttgart, Institute for Materials Science , Heisenbergstr. 3 , 70569 Stuttgart , Germany
- Technische Universität Darmstadt, Institute of Materials Science , Alarich-Weiss-Str. 2 , 64287 Darmstadt , Germany
- Fraunhofer Institute Materials Recycling and Resource Strategies IWKS , Rodenbacher Chaussee 4 , 63457 Hanau , Germany
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Pan KL, Pan GT, Chong S, Chang MB. Removal of VOCs from gas streams with double perovskite-type catalysts. J Environ Sci (China) 2018; 69:205-216. [PMID: 29941256 DOI: 10.1016/j.jes.2017.10.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 10/13/2017] [Accepted: 10/24/2017] [Indexed: 06/08/2023]
Abstract
Double perovskite-type catalysts including La2CoMnO6 and La2CuMnO6 are first evaluated for the effectiveness in removing volatile organic compounds (VOCs), and single perovskites (LaCoO3, LaMnO3, and LaCuO3) are also tested for comparison. All perovskites are tested with the gas hourly space velocity (GHSV) of 30,000hr-1, and the temperature range of 100-600°C for C7H8 removal. Experimental results indicate that double perovskites have better activity if compared with single perovskites. Especially, toluene (C7H8) can be completely oxidized to CO2 at 300°C as La2CoMnO6 is applied. Characterization of catalysts indicates that double perovskites own unique surface properties and are of higher amounts of lattice oxygen, leading to higher activity. Additionally, apparent activation energy of 68kJ/mol is calculated using Mars-van Krevelen model for C7H8 oxidation with La2CoMnO6 as catalyst. For durability test, both La2CoMnO6 and La2CuMnO6 maintain high C7H8 removal efficiencies of 100% and 98%, respectively, at 300°C and 30,000hr-1, and they also show good resistance to CO2 (5%) and H2O(g) (5%) of the gas streams tested. For various VOCs including isopropyl alcohol (C3H8O), ethanal (C2H4O), and ethylene (C2H4) tested, as high as 100% efficiency could be achieved with double perovskite-type catalysts operated at 300-350°C, indicating that double perovskites are promising catalysts for VOCs removal.
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Affiliation(s)
- Kuan Lun Pan
- Graduate Institute of Environmental Engineering, National Central University, Taoyuan City 32001, Chinese Taipei
| | - Guan Ting Pan
- Department of Chemical Engineering, National Taipei University of Technology, Taipei City 10608, Chinese Taipei
| | - Siewhui Chong
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500, Selangor, Malaysia
| | - Moo Been Chang
- Graduate Institute of Environmental Engineering, National Central University, Taoyuan City 32001, Chinese Taipei.
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Yu Y, Lu Z, Guo Q, Yu J, Li Y, Zhang X, Cheng Y, Yao Y, Liu H. Enhanced solar-light-driven photocatalytic performance by the synergistic effects of F− doped and Ag loaded SrTiO3 cubic nanoparticles. Chem Phys Lett 2018; 692:94-101. [DOI: 10.1016/j.cplett.2017.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Konsolakis M. Recent Advances on Nitrous Oxide (N2O) Decomposition over Non-Noble-Metal Oxide Catalysts: Catalytic Performance, Mechanistic Considerations, and Surface Chemistry Aspects. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01605] [Citation(s) in RCA: 230] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michalis Konsolakis
- School of Production Engineering
and Management, Technical University of Crete, GR−73100 Chania, Crete Greece
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Acharya S, Martha S, Sahoo PC, Parida K. Glimpses of the modification of perovskite with graphene-analogous materials in photocatalytic applications. Inorg Chem Front 2015. [DOI: 10.1039/c5qi00124b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review highlights the recent trends in the modification of perovskite with graphene-analogous materials towards H2production and pollutant degradation.
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Affiliation(s)
- Saumyaprava Acharya
- Centre for Nano Science and Nano Technology
- ITER
- Siksha ‘O’ Anusandhan University
- Bhubaneswar-751030
- India
| | - Satyabadi Martha
- Centre for Nano Science and Nano Technology
- ITER
- Siksha ‘O’ Anusandhan University
- Bhubaneswar-751030
- India
| | - Prakash Chandra Sahoo
- Centre for Nano Science and Nano Technology
- ITER
- Siksha ‘O’ Anusandhan University
- Bhubaneswar-751030
- India
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology
- ITER
- Siksha ‘O’ Anusandhan University
- Bhubaneswar-751030
- India
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