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Farrokhpour H, Gerami M, Jouypazadeh H. Be 2C monolayer as an efficient adsorbent of toxic volatile organic compounds: theoretical investigation. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2132184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
| | - Mehrdad Gerami
- Department of Chemistry, Isfahan University of Technology, Isfahan, Iran
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Zhu D, Chen Z, Li J, Wu Z, Gao E, Wang W, Yao S. Evaluation of Au/γ-Al 2O 3 nanocatalyst for plasma-catalytic decomposition of toluene. CHEMOSPHERE 2021; 285:131474. [PMID: 34329130 DOI: 10.1016/j.chemosphere.2021.131474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 07/06/2021] [Accepted: 07/06/2021] [Indexed: 05/26/2023]
Abstract
The emission of toluene into the atmosphere can seriously affect the environmental quality and endanger human health. A dielectric barrier discharge reactor filled with a small amount of Au nanocatalysts was used to decompose toluene in He and O2 gases mixtures at room temperature and atmospheric pressure. Normally, the oxidation of toluene using Au nanocatalysts suffers from low reaction activity and facile catalyst deactivation. Herein, the effects of Au loading, calcination time and calcination temperature were systematically investigated. It was found that 0.1 wt%Au/γ-Al2O3 calcined at 300 °C for 5 h can keep an average size around 6 nm with good dispersion on γ-Al2O3 surface and display the best catalytic performance. Moreover, the influences of energy density, gas flow rate, toluene concentration and O2 concentration on toluene degradation using 0.1 wt%Au/γ-Al2O3 were evaluated. It showed the best catalytic performance of near 100% conversion for toluene degradation under the reaction conditions of the energy density was 20 J/L, the gas flow rate was 300 mL/min, the concentration of toluene was 376 mg/m3 and the oxygen content was 10%. Combining experimental results and theoretical calculations, the values of reaction constant k were 8.6 × 10-5, 3.53 × 10-5 and 3.09 × 10-5 m6/(mol*J), when O2 concentration, power or flow rate changed, respectively. Therefore, O2 concentration has the greatest effect on toluene decomposition compared to other factors in the presence of Au/γ-Al2O3.
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Affiliation(s)
- Dandan Zhu
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China
| | - Zhizong Chen
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang, 310018, China; Focused Photonics (Hangzhou) Inc., Zhejiang, 310052, China
| | - Jing Li
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China.
| | - Zuliang Wu
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China; School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang, 310018, China
| | - Erhao Gao
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China
| | - Wei Wang
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China
| | - Shuiliang Yao
- School of Environmental and Safety Engineering, Changzhou University, Jiangsu, 213164, China; Advanced Plasma Catalysis Engineering Laboratory for China Petrochemical Industry, Changzhou University, Jiangsu, 213164, China; School of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang, 310018, China.
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Carabineiro SAC. Supported Gold Nanoparticles as Catalysts for the Oxidation of Alcohols and Alkanes. Front Chem 2019; 7:702. [PMID: 31750289 PMCID: PMC6848162 DOI: 10.3389/fchem.2019.00702] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 10/08/2019] [Indexed: 11/13/2022] Open
Abstract
Supporting gold nanoparticles have shown to be extremely active for many industrially important reactions, including oxidations. Two representative examples are the oxidation of alcohols and alkanes, that are substrates of industrial interest, but whose oxidation is still challenging. This review deals with these reactions, giving an insight of the first studies performed by gold based catalysts in these reactions and the most recent developments in the field.
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Affiliation(s)
- Sónia A C Carabineiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
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Soares OSGP, Fonseca AM, Parpot P, Órfão JJM, Pereira MFR, Neves IC. Oxidation of Volatile Organic Compounds by Highly Efficient Metal Zeolite Catalysts. ChemCatChem 2018. [DOI: 10.1002/cctc.201800524] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Olívia S. G. P. Soares
- Laboratório de Catálise e Materiais (LCM) Laboratório Associado LSRE/LCM; Universidade do Porto; Rua Dr. Roberto Frias Porto 4200-465 Portugal
| | - António M. Fonseca
- CQUM - Centro de Química; Universidade do Minho Campus de Gualtar; Braga 4710-057 Portugal
- CEB - Centre of Biological Engineering; Universidade do Minho Campus de Gualta; Braga 4710-057 Portugal
| | - Pier Parpot
- CQUM - Centro de Química; Universidade do Minho Campus de Gualtar; Braga 4710-057 Portugal
- CEB - Centre of Biological Engineering; Universidade do Minho Campus de Gualta; Braga 4710-057 Portugal
| | - José J. M. Órfão
- Laboratório de Catálise e Materiais (LCM) Laboratório Associado LSRE/LCM; Universidade do Porto; Rua Dr. Roberto Frias Porto 4200-465 Portugal
| | - Manuel F. R. Pereira
- Laboratório de Catálise e Materiais (LCM) Laboratório Associado LSRE/LCM; Universidade do Porto; Rua Dr. Roberto Frias Porto 4200-465 Portugal
| | - Isabel C. Neves
- CQUM - Centro de Química; Universidade do Minho Campus de Gualtar; Braga 4710-057 Portugal
- CEB - Centre of Biological Engineering; Universidade do Minho Campus de Gualta; Braga 4710-057 Portugal
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Dias Ribeiro de Sousa Martins LM, Carabineiro SAC, Wang J, Rocha BGM, Maldonado-Hódar FJ, Latourrette de Oliveira Pombeiro AJ. Supported Gold Nanoparticles as Reusable Catalysts for Oxidation Reactions of Industrial Significance. ChemCatChem 2017. [DOI: 10.1002/cctc.201601442] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Luísa Margarida Dias Ribeiro de Sousa Martins
- Centro de Química Estrutural, Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais 1049-001 Lisboa Portugal
- Chemical Engineering Departament; Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa; Rua Conselheiro Emídio Navarro 1959-007 Lisboa Portugal
| | - Sónia Alexandra Correia Carabineiro
- Laboratório de Catálise e Materiais, Laboratório Associado LSRE-LCM, Faculdade de Engenharia; Universidade do Porto; Rua Dr. Roberto Frias 4200-465 Porto Portugal
| | - Jiawei Wang
- Centro de Química Estrutural, Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais 1049-001 Lisboa Portugal
| | - Bruno Gonçalo Martins Rocha
- Centro de Química Estrutural, Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais 1049-001 Lisboa Portugal
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Korotcenkov G, Gulina LB, Cho B, Brinzari V, Tolstoy VP. Synthesis by successive ionic layer deposition (SILD) methodology and characterization of gold nanoclusters on the surface of tin and indium oxide films. PURE APPL CHEM 2014. [DOI: 10.1515/pac-2013-1102] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe ability of successive ionic layer deposition (SILD) technology to synthesize gold clusters on the surface of tin(IV) oxide and indium(III) oxide films is discussed. It was shown that during the process, concentration of active sites that are capable of absorbing gold ions, and the size of the gold particles thus formed, may be controlled by both concentration of the solutions used and the number of SILD cycles. Thus, SILD methodology, employing separate and multiple stages of adsorption and reduction of adsorbed species, has considerable potential for customizing the properties of the deposited metal nanoparticles. In particular, it is shown that during the deposition of gold nanoparticles on the surface of tin(IV) oxide and indium(III) oxide films by SILD methodology, conditions can be realized under which the size of gold nanoclusters may be controllably varied between 1–3 nm and 50 nm. A model is proposed for the formation of gold clusters during the SILD process.
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Affiliation(s)
- Ghenadii Korotcenkov
- 1Gwangju Institute of Science and Technology, Department of Material Science and Engineering, Gwangju, Korea
| | - Larisa B. Gulina
- 2Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Beongki Cho
- 1Gwangju Institute of Science and Technology, Department of Material Science and Engineering, Gwangju, Korea
| | - Vladimir Brinzari
- 3Department of Theoretical Physics, State University of Moldova, Chisinau, Moldova
| | - Valery P. Tolstoy
- 2Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
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Sankar M, He Q, Morad M, Pritchard J, Freakley SJ, Edwards JK, Taylor SH, Morgan DJ, Carley AF, Knight DW, Kiely CJ, Hutchings GJ. Synthesis of stable ligand-free gold-palladium nanoparticles using a simple excess anion method. ACS NANO 2012; 6:6600-6613. [PMID: 22769042 DOI: 10.1021/nn302299e] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report a convenient excess anion modification and post-reduction step to the impregnation method which permits the reproducible preparation of supported bimetallic AuPd nanoparticles having a tight particle size distribution comparable to that found for sol-immobilization materials but without the complication of ligands adsorbed on the particle surface. The advantageous features of the modified impregnation materials compared to those made by conventional impregnation include a smaller average particle size, an optimized random alloy composition, and improved compositional uniformity from particle-to-particle resulting in higher activity and stability compared to the catalysts prepared using both conventional impregnation and sol immobilization methods. Detailed STEM combined with EDX analyses of individual particles have revealed that an increase in anion concentration increases the gold content of individual particles in the resultant catalyst, thus providing a method to control/tune the composition of the nanoalloy particles. The improved activity and stability characteristics of these new catalysts are demonstrated using (i) the direct synthesis of hydrogen peroxide and (ii) the solvent-free aerobic oxidation of benzyl alcohol as case studies.
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