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Shin J, Lee J, Xiao X, Yu T. Enhancing catalytic activity of TiO 2 nanoparticles through acid treatment in Eosin-Y sensitized photohydrogen evolution reaction system. Heliyon 2024; 10:e30765. [PMID: 38765064 PMCID: PMC11101847 DOI: 10.1016/j.heliyon.2024.e30765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 03/28/2024] [Accepted: 05/03/2024] [Indexed: 05/21/2024] Open
Abstract
Light-driven water splitting has gained increasing attention as an eco-friendly method for hydrogen production. There is a pressing need to enhance the performance of catalysts for the commercial viability of this reaction. Many methods have been proposed to improve catalyst performance; however, an economical and straightforward approach remains a priority. This paper presents an uncomplicated technique called acid treatment, which augments the catalytic performance of nanoparticles. The method promotes a change in the catalytic reactivity by causing a deficit in electron density of Ti and O on the surface of TiO2 nanoparticles without altering their size, morphology, or crystal structure. In the Eosin Y sensitized photocatalytic hydrogen production system, nitric acid treated TiO2 (16.95 μmol/g) exhibited 1.5 times the hydrogen production compared to bare TiO2 (11.15 μmol/g).
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Affiliation(s)
- Jiwoo Shin
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Jaeyoung Lee
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, United States
| | - Xiangyun Xiao
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
- Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, PR China
| | - Taekyung Yu
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
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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. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 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] [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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Chuang HT, Liu RY, Trinh MM, Chang MB. Ozone catalytic oxidation of toluene over triple perovskite-type catalysts modified with KMnO 4. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:106068-106082. [PMID: 37726623 DOI: 10.1007/s11356-023-29785-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 09/04/2023] [Indexed: 09/21/2023]
Abstract
A unique triple perovskite-type catalyst was successfully synthesized using the simple sol-gel approach, and surface acid modification was added to improve the ozone catalytic oxidation (OZCO) process ability to remove toluene more effectively. Our study indicates that La3MnCuNiO9 catalyst treated with KMnO4 shows the best toluene oxidation activity. At 250 °C, the rates of conversion and mineralization were 100% and 83%, respectively, under thermal catalytic system when C7H8 concentration = 500 ppm. During the OZCO system ([C7H8] = 20 ppm, O3/C7H8=8; room temperature), for 6 h, the conversion rate remained at 100%. The high ratios of Mn4+/(Mn4++Mn3+), Cu2+, and abundant surface oxygen species, high specific surface area, and pore volume lead to remarkable catalytic performance of this catalyst. Meanwhile, the catalyst contributes to superior stability and water resistance. The catalytic mechanism of La3MnCuNiO9 after KMnO4 treatment in the context of OZCO was further discussed. Overall, after KMnO4 treatment, the La3MnCuNiO9 catalyst reveals extraordinary catalytic activity and excellent stability combination of this catalyst with ozone exhibits high toluene removal efficiency in the OZCO system and has a good potential for industrial applications.
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Affiliation(s)
- Hsin Tzu Chuang
- Graduate Institute of Environmental Engineering, National Central University, Chungli, Taiwan
| | - Run Yu Liu
- Graduate Institute of Environmental Engineering, National Central University, Chungli, Taiwan
| | - Minh Man Trinh
- Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu, 31040, Taiwan
| | - Moo Been Chang
- Graduate Institute of Environmental Engineering, National Central University, Chungli, Taiwan.
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Li L, Tao D, Zhao Q, Fu S, Chen C, Tian M, Shi J, Ma M, He C. Strengthening chlorobenzene catalytic degradation rate and selectivity over LaxSr1-xMnO3±δ by anchoring interfacial oxygen vacancy. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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BAO LEI, WU DONGFANG. Catalytic properties of SmMnO3/cordierite monolithic catalysts: acid treatment and calcination process optimization using response surface methodology. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02042-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yang Q, Wang X, Wang X, Li Q, Li L, Yang W, Chu X, Liu H, Men J, Peng Y, Ma Y, Li J. Surface Reconstruction of a Mullite-Type Catalyst via Selective Dissolution for NO Oxidation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03955] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Qilei Yang
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Xiao Wang
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Xiyang Wang
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Qi Li
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Lei Li
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Weinan Yang
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Xuefeng Chu
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Hao Liu
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Jishuai Men
- Air Pollution Control Laboratory, Shandong Daming Science and Technology Co., Ltd., Shandong 277500, P. R. China
| | - Yue Peng
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Yongliang Ma
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Junhua Li
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
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Research advances of rare earth catalysts for catalytic purification of vehicle exhausts − Commemorating the 100th anniversary of the birth of Academician Guangxian Xu. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.05.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Yang Q, Li Q, Li L, Peng Y, Wang D, Ma Y, Li J. Synthesis of α-MnO 2-like rod catalyst using YMn 2O 5 A-site sacrificial strategy for efficient benzene oxidation. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123811. [PMID: 33264910 DOI: 10.1016/j.jhazmat.2020.123811] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/13/2020] [Accepted: 08/28/2020] [Indexed: 06/12/2023]
Abstract
The elimination of benzene, a typical volatile organic pollutant, is one of the most challenging topics for environmental scientists. Catalytic oxidation technology is considered the most efficient approach for its elimination. Herein, we report the successful preparation of a novel α-MnO2-like rod catalyst via an acid etching route and propose YMn2O5 mullite as a novel precursor. The optimized α-MnO2-like rod catalyst showed significantly improved benzene oxidation activity compared to the raw YMn2O5 and commercial MnO2 catalysts, resulting in 100 % benzene conversion at 200 °C at a GHSV of 60,000 mL g-1 h-1. Notably, the α-MnO2-like rod catalyst performance at lower temperatures (100-175 ℃) exceeded that of a commercial Pt/Al2O3 catalyst. The excellent catalytic performance of the α-MnO2-like rod catalyst is associated with its low-temperature reducibility and abundant surface-active oxygen species. During the acid etching process, more Mn3+ is oxidized to Mn4+, and more surface oxygen vacancies are generated on the α-MnO2-like rod catalyst, which provides more adsorption sites for oxygen molecules to promote the benzene oxidation reaction. The α-MnO2-like rod catalyst should be a great alternative to commercial noble metal catalysts for the elimination of volatile organic pollutants, especially at lower temperatures.
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Affiliation(s)
- Qilei Yang
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Qi Li
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Lei Li
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Yue Peng
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Dong Wang
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Yongliang Ma
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Junhua Li
- School of Environment, Tsinghua University, Beijing 100084, China
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