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Gonçalves MDL, Assis PBN, da Silva AN, Bertoldo GM, Bezerra RDCF, Castro AJR, Oliveira AC, Lang R, Saraiva GD. Laser-power dependence effects on the structural stability of nanocomposite catalysts studied by Raman spectroscopy: On the structure-activity correlations in glycerol acetylation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 280:121526. [PMID: 35753101 DOI: 10.1016/j.saa.2022.121526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 05/27/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Structural properties of binary CeAl, CeMn, NiAl, CeZr, SnTi and ZrMn nanocomposite oxide catalysts were monitored towards the Laser Raman spectroscopy investigations providing new insights to control catalytic applications upon temperature ranges at which the laser power was varied. The lattice vibrational properties were investigated by varying the incident laser power during Raman measurements from 0.017 mW to 4.0 mW. Structural changes in nanocomposites were achieved upon increasing laser power, which induced local heating disorder causing the sintering of CeMn, SnTi, and ZrMn nanocomposites. The laser-power dependence effects on the structural stability of CeAl, NiAl, and CeZr were observed with high amounts of oxygen vacancy defects over CeAl upon laser power heating. Both CeMn and ZrMn exhibited phase transitions from MnO2 to α-Mn2O3 being the use of the latter nanocomposites limited to work at 1.1 mW. The structure-activity correlations for the nanocomposite oxide catalysts were evaluated through the acetylation of glycerol with acetic acid reaction to produce valuable acetins. Remarkable shifts in the Raman bands wavenumbers and other spectral changes in the lattice mode were caused by laser-induced phenomena accounting for the undesired phase formation and particle growths, as well. This resulted in a low catalytic performance of the NiAl, SnTi, CeMn and ZrMn owing to the thermal effects. Contrary, CeAl and CeZr were more active for acetins products avoiding the phase transformations due to their structural stability at high temperatures, which in turn avoided leaching of the active Ce sites during the reaction.
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Affiliation(s)
| | - Pierre B N Assis
- Universidade Federal do Ceará, Campus Russas, Russas, Ceará, Brazil
| | | | - Gabriela M Bertoldo
- Universidade Federal do Ceará, Campus do Pici-Bloco 940, Departamento de Química Analítica e Físico-Química, Fortaleza, Ceará, Brazil
| | - Rita de Cassia F Bezerra
- Universidade Federal do Ceará, Campus do Pici-Bloco 940, Departamento de Química Analítica e Físico-Química, Fortaleza, Ceará, Brazil
| | | | - Alcineia C Oliveira
- Universidade Federal do Ceará, Campus do Pici-Bloco 940, Departamento de Química Analítica e Físico-Química, Fortaleza, Ceará, Brazil.
| | - Rossano Lang
- Instituto de Ciencia e Tecnologia-ICT, Federal Universidade of São Paulo-UNIFESP, São José dos Campos, Brazil
| | - Gilberto D Saraiva
- Faculdade de Educação Ciências e Letras do Sertão Central, Universidade Estadual do Ceará, Quixadá, Ceará, Brazil
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Gérardy R, Debecker DP, Estager J, Luis P, Monbaliu JCM. Continuous Flow Upgrading of Selected C 2-C 6 Platform Chemicals Derived from Biomass. Chem Rev 2020; 120:7219-7347. [PMID: 32667196 DOI: 10.1021/acs.chemrev.9b00846] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The ever increasing industrial production of commodity and specialty chemicals inexorably depletes the finite primary fossil resources available on Earth. The forecast of population growth over the next 3 decades is a very strong incentive for the identification of alternative primary resources other than petro-based ones. In contrast with fossil resources, renewable biomass is a virtually inexhaustible reservoir of chemical building blocks. Shifting the current industrial paradigm from almost exclusively petro-based resources to alternative bio-based raw materials requires more than vibrant political messages; it requires a profound revision of the concepts and technologies on which industrial chemical processes rely. Only a small fraction of molecules extracted from biomass bears significant chemical and commercial potentials to be considered as ubiquitous chemical platforms upon which a new, bio-based industry can thrive. Owing to its inherent assets in terms of unique process experience, scalability, and reduced environmental footprint, flow chemistry arguably has a major role to play in this context. This review covers a selection of C2 to C6 bio-based chemical platforms with existing commercial markets including polyols (ethylene glycol, 1,2-propanediol, 1,3-propanediol, glycerol, 1,4-butanediol, xylitol, and sorbitol), furanoids (furfural and 5-hydroxymethylfurfural) and carboxylic acids (lactic acid, succinic acid, fumaric acid, malic acid, itaconic acid, and levulinic acid). The aim of this review is to illustrate the various aspects of upgrading bio-based platform molecules toward commodity or specialty chemicals using new process concepts that fall under the umbrella of continuous flow technology and that could change the future perspectives of biorefineries.
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Affiliation(s)
- Romaric Gérardy
- Center for Integrated Technology and Organic Synthesis, MolSys Research Unit, University of Liège, B-4000 Sart Tilman, Liège, Belgium
| | - Damien P Debecker
- Institute of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain (UCLouvain), B-1348 Louvain-la-Neuve, Belgium.,Research & Innovation Centre for Process Engineering (ReCIPE), Université catholique de Louvain (UCLouvain), B-1348 Louvain-la-Neuve, Belgium
| | - Julien Estager
- Certech, Rue Jules Bordet 45, Zone Industrielle C, B-7180 Seneffe, Belgium
| | - Patricia Luis
- Research & Innovation Centre for Process Engineering (ReCIPE), Université catholique de Louvain (UCLouvain), B-1348 Louvain-la-Neuve, Belgium.,Materials & Process Engineering (iMMC-IMAP), UCLouvain, B-1348 Louvain-la-Neuve, Belgium
| | - Jean-Christophe M Monbaliu
- Center for Integrated Technology and Organic Synthesis, MolSys Research Unit, University of Liège, B-4000 Sart Tilman, Liège, Belgium
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Zeng Y, Jiang D, Wang Y, Zhang S, Zhong Q. The inhibition effect of oxygen in the calcination atmosphere on the catalytic performance of MnOx–CeO2 catalysts for NO oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1234-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Glycerol Steam Reforming for Hydrogen Production over Nickel Supported on Alumina, Zirconia and Silica Catalysts. Top Catal 2017. [DOI: 10.1007/s11244-017-0796-y] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Neto AS, Oliveira AC, Filho JM, Amadeo N, Dieuzeide ML, de Sousa FF, Oliveira AC. Characterizations of nanostructured nickel aluminates as catalysts for conversion of glycerol: Influence of the preparation methods. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2016.09.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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da Silva AN, Pinto RCF, Freire PTC, Junior JAL, Oliveira AC, Filho JM. Temperature and high pressure effects on the structural features of catalytic nanocomposites oxides by Raman spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:763-773. [PMID: 25544192 DOI: 10.1016/j.saa.2014.11.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 10/28/2014] [Accepted: 11/23/2014] [Indexed: 06/04/2023]
Abstract
Structural characterizations of nanostructured oxides were studied by X-ray diffraction (XRD), Raman and infrared spectroscopy. The oxides catalysts namely, SnO2, ZrO2, CeO2, MnOx, Al2O3 and TiO2 were prepared by a nanocasting route and the effect of the temperature and pressure on the stability of the solids was evaluated. Raman spectra showed that ZrO2 and TiO2 exhibited phase transitions at moderate temperatures whereas CeO2, SnO2 and MnOx had an effective creation of defects in their structures upon annealing at elevated temperatures. The results suggested also that the effect of the temperature on the particles growth is related to the type of oxide. In this regard, phase transition by up to 600°C accelerated the sintering of ZrO2 and CeO2 grains compared to TiO2, SnO2 and MnOx counterparts. Under hydrostatic pressures lower than 10GPa, rutile TiO2 and tetragonal ZrO2 exhibited pressure induced phase transition whereas CeO2 and SnO2 were stable at pressures close to 15GPa. The experiments revealed that the nanostructured SnO2 oxide exhibited stable performance at relatively high temperatures without phase transition or sintering, being suitable to be used as catalysts in the range of temperature and pressure studied.
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Affiliation(s)
- Antonio N da Silva
- Universidade Federal do Ceará, Campus do Pici-Bloco 922, Departamento de Física, Fortaleza, Ceará, Brazil
| | - Raffael C F Pinto
- Universidade Federal do Ceará, Campus do Pici-Bloco 922, Departamento de Física, Fortaleza, Ceará, Brazil
| | - Paulo T C Freire
- Universidade Federal do Ceará, Campus do Pici-Bloco 922, Departamento de Física, Fortaleza, Ceará, Brazil
| | - Jose Alves L Junior
- Universidade Federal do Ceará, Campus do Pici-Bloco 922, Departamento de Física, Fortaleza, Ceará, Brazil
| | - Alcineia C Oliveira
- Universidade Federal do Ceará, Campus do Pici-Bloco 940, Departamento de Química Analítica e Físico-Química, Fortaleza, Ceará, Brazil.
| | - Josué M Filho
- Universidade Federal do Ceará, Campus do Pici-Bloco 922, Departamento de Física, Fortaleza, Ceará, Brazil
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Jampaiah D, Tur KM, Venkataswamy P, Ippolito SJ, Sabri YM, Tardio J, Bhargava SK, Reddy BM. Catalytic oxidation and adsorption of elemental mercury over nanostructured CeO2–MnOx catalyst. RSC Adv 2015. [DOI: 10.1039/c4ra16787b] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The presence of oxygen vacancies and synergetic interaction between Ce and Mn were responsible for superior Hg0 oxidation performance of CeO2–MnOx compared to pure CeO2 and MnOx.
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Affiliation(s)
- Deshetti Jampaiah
- RMIT-IICT Joint Research Centre
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
| | - Katie M. Tur
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- School of Applied Sciences
- RMIT University
- Melbourne-3001
- Australia
| | - Perala Venkataswamy
- RMIT-IICT Joint Research Centre
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
| | - Samuel J. Ippolito
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- School of Applied Sciences
- RMIT University
- Melbourne-3001
- Australia
| | - Ylias M. Sabri
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- School of Applied Sciences
- RMIT University
- Melbourne-3001
- Australia
| | - James Tardio
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- School of Applied Sciences
- RMIT University
- Melbourne-3001
- Australia
| | - Suresh K. Bhargava
- Centre for Advanced Materials & Industrial Chemistry (CAMIC)
- School of Applied Sciences
- RMIT University
- Melbourne-3001
- Australia
| | - Benjaram M. Reddy
- RMIT-IICT Joint Research Centre
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
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Zhao H, Zhang G, Zhang Q. MnO2/CeO2 for catalytic ultrasonic degradation of methyl orange. ULTRASONICS SONOCHEMISTRY 2014; 21:991-996. [PMID: 24369902 DOI: 10.1016/j.ultsonch.2013.12.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Revised: 12/03/2013] [Accepted: 12/06/2013] [Indexed: 06/03/2023]
Abstract
Catalytic ultrasonic degradation of aqueous methyl orange was studied in this paper. Heterogeneous catalyst MnO2/CeO2 was prepared by impregnation of manganese oxide on cerium oxide. Morphology and specific surface area of MnO2/CeO2 catalyst were characterized and its composition was determined. Results showed big differences between fresh and used catalyst. The removal efficiency of methyl orange by MnO2/CeO2 catalytic ultrasonic process was investigated. Results showed that ultrasonic process could remove 3.5% of methyl orange while catalytic ultrasonic process could remove 85% of methyl orange in 10 min. The effects of free radical scavengers were studied to determine the role of hydroxyl free radical in catalytic ultrasonic process. Results showed that methyl orange degradation efficiency declined after adding free radical scavengers, illustrating that hydroxyl free radical played an important role in degrading methyl orange. Theoretic analysis showed that the resonance size of cavitation bubbles was comparable with the size of catalyst particles. Thus, catalyst particles might act as cavitation nucleus and enhance ultrasonic cavitation effects. Measurement of H2O2 concentration in catalytic ultrasonic process confirmed this hypothesis. Effects of pre-adsorption on catalytic ultrasonic process were examined. Pre-adsorption significantly improved methyl orange removal. The potential explanation was that methyl orange molecules adsorbed on catalysts could enter cavitation bubbles and undergo stronger cavitation.
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Affiliation(s)
- He Zhao
- School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China
| | - Guangming Zhang
- School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China.
| | - Quanling Zhang
- School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China; Master Erasmus Mundus Mamaself Universit Rennes, 1 Campus de Beaulieu, 35042 Ernnes Cedex, France
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