1
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Yang Q, Li M, Zhao Z, Liao X, Li J. Simulation of Binder Jetting and Analysis of Magnesium Alloy Bonding Mechanism. 3D PRINTING AND ADDITIVE MANUFACTURING 2024; 11:e751-e763. [PMID: 38694835 PMCID: PMC11058416 DOI: 10.1089/3dp.2022.0252] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2024]
Abstract
Binder jetting (3DP) is a kind of additive manufacturing at room temperature and atmospheric environment, which can reduce the risk of magnesium alloy forming. Magnesium alloy powder is bonded to a certain structure by a binder, so the appropriate binder is very important in 3DP. In this study, according to the characteristics of magnesium alloy, a simple and easy-to-obtain water-based low-molecular alcohol binder was used to reduce the difficulty of magnesium alloy 3DP. Additionally, we use COMSOL Multiphysics simulation software to establish a simulation model of the movement and deposition process of the binder. The results show that the increase in jet velocity will increase the quality and saturation of droplets. More importantly, the larger the jet velocity is, the larger the spreading width of the binder droplet after impacting the powder bed, which seriously affects the dimensional accuracy of the green part. In addition, lower binder saturation will weaken the formation of interparticle bonding neck and cannot form a stable structure. Furthermore, we analyzed the bond reactants of the binder and magnesium alloy powder, which eventually decompose into MgO, and the experimental results show that the final sintered sample has considerable performance.
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Affiliation(s)
- Qiang Yang
- College of Materials Science and Engineering, Chongqing University, Chongqing, China
| | - Mei Li
- College of Materials Science and Engineering, Chongqing University, Chongqing, China
| | - Ze Zhao
- College of Materials Science and Engineering, Chongqing University, Chongqing, China
| | - Ximeng Liao
- College of Materials Science and Engineering, Chongqing University, Chongqing, China
| | - Junchao Li
- College of Materials Science and Engineering, Chongqing University, Chongqing, China
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2
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Neal CJ, Kolanthai E, Wei F, Coathup M, Seal S. Surface Chemistry of Biologically Active Reducible Oxide Nanozymes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2211261. [PMID: 37000888 DOI: 10.1002/adma.202211261] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/15/2023] [Indexed: 06/19/2023]
Abstract
Reducible metal oxide nanozymes (rNZs) are a subject of intense recent interest due to their catalytic nature, ease of synthesis, and complex surface character. Such materials contain surface sites which facilitate enzyme-mimetic reactions via substrate coordination and redox cycling. Further, these surface reactive sites are shown to be highly sensitive to stresses within the nanomaterial lattice, the physicochemical environment, and to processing conditions occurring as part of their syntheses. When administered in vivo, a complex protein corona binds to the surface, redefining its biological identity and subsequent interactions within the biological system. Catalytic activities of rNZs each deliver a differing impact on protein corona formation, its composition, and in turn, their recognition, and internalization by host cells. Improving the understanding of the precise principles that dominate rNZ surface-biomolecule adsorption raises the question of whether designer rNZs can be engineered to prevent corona formation, or indeed to produce "custom" protein coronas applied either in vitro, and preadministration, or formed immediately upon their exposure to body fluids. Here, fundamental surface chemistry processes and their implications in rNZ material performance are considered. In particular, material structures which inform component adsorption from the application environment, including substrates for enzyme-mimetic reactions are discussed.
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Affiliation(s)
- Craig J Neal
- Advanced Materials Processing and Analysis Center, Nanoscience Technology Center (NSTC), Materials Science and Engineering, College of Medicine, University of Central Florida, Orlando, FL, 32816, USA
| | - Elayaraja Kolanthai
- Advanced Materials Processing and Analysis Center, Nanoscience Technology Center (NSTC), Materials Science and Engineering, College of Medicine, University of Central Florida, Orlando, FL, 32816, USA
| | - Fei Wei
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Melanie Coathup
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
| | - Sudipta Seal
- Advanced Materials Processing and Analysis Center, Nanoscience Technology Center (NSTC), Materials Science and Engineering, College of Medicine, University of Central Florida, Orlando, FL, 32816, USA
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA
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3
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Si R, Xu Y, Shen C, Jiang H, Lei M, Guo X, Xie S, Gao S, Zhang S. High-Selectivity Laminated Gas Sensor Based on Characteristic Peak under Temperature Modulation. ACS Sens 2024; 9:674-688. [PMID: 38254338 DOI: 10.1021/acssensors.3c01831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Aiming at the bottleneck problem of insufficient selectivity of metal oxide gas sensors, a reliable scheme to improve selectivity is proposed, that is, a laminated sensor structure of a gas-sensitive membrane plus catalytic membrane combined with the temperature modulation technology. It is presented as a highly selective ethanol sensor as an example for verification. The laminated gas sensor is made of Sr@SnO2 as the gas-sensing membrane and ZSM-5 as the catalytic membrane by the microelectro mechanical system. The results indicate that in temperature modulation mode, the Sr@SnO2/ZSM-5-laminated sensor has good resistance gas-sensing response to most different types of gases but only shows a characteristic peak on the time-resistance and temperature-resistance curves of ethanol gas response. By defining and calculating this characteristic peak, the selectivity of ethanol gas response signal is improved. The Sr@SnO2/ZSM-5 sensor also exhibits high sensitivity to ethanol gas at the parts per billion level, fast response/recovery time in seconds, excellent anti-interference, and stability, indicating the reliability and practicality of this highly selective scheme. This scheme is of great significance for the study of high selectivity of a metal oxide gas sensor and promotes its wide application.
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Affiliation(s)
- Renjun Si
- State Key Laboratory of Material Processing and Die &Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Yong Xu
- Anti Chemical Institute of the Chinese People's Liberation Army, Beijing 102205, PR China
| | - Chenxi Shen
- State Key Laboratory of Material Processing and Die &Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Hongze Jiang
- State Key Laboratory of Material Processing and Die &Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Ming Lei
- State Key Laboratory of Material Processing and Die &Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Xin Guo
- State Key Laboratory of Material Processing and Die &Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Suijiang Xie
- China Ordnance Equipment Group Automation Institute Co., Ltd., Mianyang, Sichuan 621000, PR China
| | - Shi Gao
- Anti Chemical Institute of the Chinese People's Liberation Army, Beijing 102205, PR China
| | - Shunping Zhang
- State Key Laboratory of Material Processing and Die &Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
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4
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Trachta M, Bludský O, Vaculík J, Bulánek R, Rubeš M. Investigation of Brønsted acidity in zeolites through adsorbates with diverse proton affinities. Sci Rep 2023; 13:12380. [PMID: 37524787 PMCID: PMC10390515 DOI: 10.1038/s41598-023-39667-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 07/28/2023] [Indexed: 08/02/2023] Open
Abstract
Understanding the adsorption behavior of base probes in aluminosilicates and its relationship to the intrinsic acidity of Brønsted acid sites (BAS) is essential for the catalytic applications of these materials. In this study, we investigated the adsorption properties of base probe molecules with varying proton affinities (acetonitrile, acetone, formamide, and ammonia) within six different aluminosilicate frameworks (FAU, CHA, IFR, MOR, FER, and TON). An important objective was to propose a robust criterion for evaluating the intrinsic BAS acidity (i.e., state of BAS deprotonation). Based on the bond order conservation principle, the changes in the covalent bond between the aluminum and oxygen carrying the proton provide a good description of the BAS deprotonation state. The ammonia and formamide adsorption cause BAS deprotonation and cannot be used to assess intrinsic BAS acidity. The transition from ion-pair formation, specifically conjugated acid/base interaction, in formamide to strong hydrogen bonding in acetone occurs within a narrow range of base proton affinities (812-822 kJ mol-1). The adsorption of acetonitrile results in the formation of hydrogen-bonded complexes, which exhibit a deprotonation state that follows a similar trend to the deprotonation induced by acetone. This allows for a semi-quantitative comparison of the acidity strengths of BAS within and between the different aluminosilicate frameworks.
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Affiliation(s)
- Michal Trachta
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 162 10, Prague, Czech Republic
| | - Ota Bludský
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 162 10, Prague, Czech Republic
| | - Jan Vaculík
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Roman Bulánek
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Miroslav Rubeš
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 162 10, Prague, Czech Republic.
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic.
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5
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Eletmany MR, Aziz Albalawi M, Alharbi RA, Elamary RB, Harb AEFA, Selim MA, Sayed Abdelgeliel A, Hassan EA, Abdellah IM. Novel arylazo nicotinate derivatives as effective antibacterial agents: Green synthesis, molecular modeling, and structure-activity relationship studies. JOURNAL OF SAUDI CHEMICAL SOCIETY 2023; 27:101647. [DOI: 10.1016/j.jscs.2023.101647] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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6
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Paiva MF, de Freitas EF, Campos de França JO, da Silva Valadares D, Loureiro Dias SC, Alves Dias J. Structural and acidity analysis of heteropolyacids supported on faujasite zeolite and its effect in the esterification of oleic acid and n-butanol. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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7
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Benzaouak A, Touach N, Mahir H, Elhamdouni Y, Labjar N, El Hamidi A, El Mahi M, Lotfi EM, Kacimi M, Liotta LF. ZrP 2O 7 as a Cathodic Material in Single-Chamber MFC for Bioenergy Production. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3330. [PMID: 36234458 PMCID: PMC9565527 DOI: 10.3390/nano12193330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
The present work is the first investigation of the electrocatalytic performances of ZrP2O7 as a cathode in a single-chamber Microbial Fuel Cell (MFC) for the conversion of chemical energy from wastewater to bioelectricity. This catalyst was prepared by a coprecipitation method, then characterized by X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), ultraviolet-visible-near-infrared spectrophotometry (UV-Vis-NIR), and cyclic voltammetry analyses. The acid-basic characteristics of the surface were probed by using 2-butanol decomposition. The conversion of 2-butanol occurs essentially through the dehydrating reaction, indicating the predominantly acidic character of the solid. The electrochemical test shows that the studied cathode material is electroactive. In addition, the ZrP2O7 in the MFC configuration exhibited high performance in terms of bioelectricity generation, giving a maximum output power density of around 449 mW m-2; moreover, it was active for wastewater treatment, reducing the chemical oxygen demand (COD) charge to 50% after three days of reaction.
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Affiliation(s)
- Abdellah Benzaouak
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Environmental Materials Team, École Nationale Supérieure d’Arts et Métiers (ENSAM), Mohammed V University in Rabat, Rabat 10 000, Morocco
- Laboratory of Physical Chemistry of Materials, Catalysis and Environment, Department of Chemistry, Faculty of Sciences, Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Noureddine Touach
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Environmental Materials Team, École Nationale Supérieure d’Arts et Métiers (ENSAM), Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Hanane Mahir
- Laboratory of Physical Chemistry of Materials, Catalysis and Environment, Department of Chemistry, Faculty of Sciences, Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Youssra Elhamdouni
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Environmental Materials Team, École Nationale Supérieure d’Arts et Métiers (ENSAM), Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Najoua Labjar
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Environmental Materials Team, École Nationale Supérieure d’Arts et Métiers (ENSAM), Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Adnane El Hamidi
- Laboratory of Physical Chemistry of Materials, Catalysis and Environment, Department of Chemistry, Faculty of Sciences, Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Mohammed El Mahi
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Environmental Materials Team, École Nationale Supérieure d’Arts et Métiers (ENSAM), Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - El Mostapha Lotfi
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Environmental Materials Team, École Nationale Supérieure d’Arts et Métiers (ENSAM), Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Mohamed Kacimi
- Laboratory of Physical Chemistry of Materials, Catalysis and Environment, Department of Chemistry, Faculty of Sciences, Mohammed V University in Rabat, Rabat 10 000, Morocco
| | - Leonarda Francesca Liotta
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN)-CNR, via Ugo La Malfa, 153, 90146 Palermo, Italy
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8
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Toulhoat H. The optimal heterogeneous catalyst for an acid-base reaction. J Catal 2022. [DOI: 10.1016/j.jcat.2022.06.040] [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]
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9
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Pieta IS, Gieroba B, Kalisz G, Pieta P, Nowakowski R, Naushad M, Rathi A, Gawande MB, Sroka-Bartnicka A, Zboril R. Developing Benign Ni/g-C 3N 4 Catalysts for CO 2 Hydrogenation: Activity and Toxicity Study. Ind Eng Chem Res 2022; 61:10496-10510. [PMID: 35938051 PMCID: PMC9344432 DOI: 10.1021/acs.iecr.2c00452] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
This research discusses
the CO2 valorization via hydrogenation
over the non-noble metal clusters of Ni and Cu supported on graphitic
carbon nitride (g-C3N4). The Ni and Cu catalysts
were characterized by conventional techniques including XRD, AFM,
ATR, Raman imaging, and TPR and were tested via the hydrogenation
of CO2 at 1 bar. The transition-metal-based catalyst designed
with atom-economy principles presents stable activity and good conversions
for the studied processes. At 1 bar, the rise in operating temperature
during CO2 hydrogenation increases the CO2 conversion
and the selectivity for CO and decreases the selectivity for methanol
on Cu/CN catalysts. For the Ni/CN catalyst, the selectivity to light
hydrocarbons, such as CH4, also increased with rising temperature.
At 623 K, the conversion attained ca. 20%, with CH4 being
the primary product of the reaction (CH4 yield >80%).
Above
700 K, the Ni/CN activity increases, reaching almost equilibrium values,
although the Ni loading in Ni/CN is lower by more than 90% compared
to the reference NiREF catalyst. The presented data offer a better
understanding of the effect of the transition metals’ small
metal cluster and their coordination and stabilization within g-C3N4, contributing to the rational hybrid catalyst
design with a less-toxic impact on the environment and health. Bare
g-C3N4 is shown as a good support candidate
for atom-economy-designed catalysts for hydrogenation application.
In addition, cytotoxicity to the keratinocyte human HaCaT cell line
revealed that low concentrations of catalysts particles (to 6.25 μg
mL–1) did not cause degenerative changes.
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Affiliation(s)
- Izabela S. Pieta
- Institute of Physical Chemistry Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Barbara Gieroba
- Independent Unit of Spectroscopy and Chemical Imaging, Medical University of Lublin, Chodzki 4a, 20-093 Lublin, Poland
| | - Grzegorz Kalisz
- Independent Unit of Spectroscopy and Chemical Imaging, Medical University of Lublin, Chodzki 4a, 20-093 Lublin, Poland
| | - Piotr Pieta
- Institute of Physical Chemistry Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Robert Nowakowski
- Institute of Physical Chemistry Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Mu. Naushad
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Anuj Rathi
- Chemistry Innovation Research Center, R&D, Jubilant Biosys, Knowledge Park II, Greater Noida, Uttar Pradesh 201310, India
| | - Manoj B. Gawande
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Slechtitelu 27, 77900 Olomouc, Czech Republic
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology, Mumbai-Marathwada Campus, Jalna 431 203, India
| | - Anna Sroka-Bartnicka
- Independent Unit of Spectroscopy and Chemical Imaging, Medical University of Lublin, Chodzki 4a, 20-093 Lublin, Poland
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Slechtitelu 27, 77900 Olomouc, Czech Republic
- Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB−Technical University of Ostrava, 17 listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
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10
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Tsatsos S, Vakros J, Ladas S, Verykios XE, Kyriakou G. The interplay between acid-base properties and Fermi level pinning of a nano dispersed tungsten oxide - titania catalytic system. J Colloid Interface Sci 2022; 614:666-676. [PMID: 35124294 DOI: 10.1016/j.jcis.2022.01.112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/27/2021] [Accepted: 01/17/2022] [Indexed: 11/19/2022]
Abstract
A series of WO3/TiO2 catalysts were synthesized, characterized, and evaluated for the NO selective catalytic reduction (SCR) with NH3. Based on a wide range of characterization techniques, a detailed model was developed that describes the interfacial electron transfer between WO3 and TiO2 and defines a relationship between the acid-base properties of the catalytic surface and electronic structure modification. The electronic interactions at the WO3/TiO2 interface were quantified using variations in the system's electronic structure. Altering the dispersion and size of the WO3 nanostructures results to drastic changes in titania's surface electron distribution, which are reflected in the pinning of Fermi level through an electron transfer process between WO3 and TiO2. The variations in the Fermi level were further related to changes in the point of zero charge (PZC) values and the activity towards NO SCR with NH3, which was used as a test reaction. Temperature Programmed Surface Reaction (TPSR) was employed to study the catalytic activity at temperatures ranging from 30 °C to 500 °C and was quantitatively correlated to changes in coverage and interfacial charge transfer. We demonstrate that higher WO3 loading on TiO2 results in a stronger electronic interaction and a higher catalytic activity. This is because electron transfer increases the surface electron density, which enhances the surface basicity of TiO2. The concomitant decrease in the adsorption energy of NH3 results in a decrease in the activation energy, which is reflected in the SCR temperature onset.
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Affiliation(s)
- Sotirios Tsatsos
- Department of Chemical Engineering, University of Patras, Caratheodory 1, Patras 26504, Greece
| | - John Vakros
- Department of Chemistry, University of Patras, Caratheodory 1, Patras 26504, Greece
| | - Spyridon Ladas
- Department of Chemical Engineering, University of Patras, Caratheodory 1, Patras 26504, Greece
| | - Xenophon E Verykios
- Department of Chemical Engineering, University of Patras, Caratheodory 1, Patras 26504, Greece
| | - Georgios Kyriakou
- Department of Chemical Engineering, University of Patras, Caratheodory 1, Patras 26504, Greece.
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11
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Weber IC, Rüedi P, Šot P, Güntner AT, Pratsinis SE. Handheld Device for Selective Benzene Sensing over Toluene and Xylene. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103853. [PMID: 34837486 PMCID: PMC8811843 DOI: 10.1002/advs.202103853] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/21/2021] [Indexed: 06/01/2023]
Abstract
More than 1 million workers are exposed routinely to carcinogenic benzene, contained in various consumer products (e.g., gasoline, rubbers, and dyes) and released from combustion of organics (e.g., tobacco). Despite strict limits (e.g., 50 parts per billion (ppb) in the European Union), routine monitoring of benzene is rarely done since low-cost sensors lack accuracy. This work presents a compact, battery-driven device that detects benzene in gas mixtures with unprecedented selectivity (>200) over inorganics, ketones, aldehydes, alcohols, and even challenging toluene and xylene. This can be attributed to strong Lewis acid sites on a packed bed of catalytic WO3 nanoparticles that prescreen a chemoresistive Pd/SnO2 sensor. That way, benzene is detected down to 13 ppb with superior robustness to relative humidity (RH, 10-80%), fulfilling the strictest legal limits. As proof of concept, benzene is quantified in indoor air in good agreement (R2 ≥ 0.94) with mass spectrometry. This device is readily applicable for personal exposure assessment and can assist the implementation of low-emission zones for sustainable environments.
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Affiliation(s)
- Ines C. Weber
- Particle Technology LaboratoryDepartment of Mechanical and Process EngineeringETH ZurichZurichCH‐8092Switzerland
| | - Pascal Rüedi
- Particle Technology LaboratoryDepartment of Mechanical and Process EngineeringETH ZurichZurichCH‐8092Switzerland
| | - Petr Šot
- Department of Chemistry and Applied BiosciencesETH ZurichZurichCH‐8049Switzerland
| | - Andreas T. Güntner
- Particle Technology LaboratoryDepartment of Mechanical and Process EngineeringETH ZurichZurichCH‐8092Switzerland
- Department of EndocrinologyDiabetologyand Clinical NutritionUniversity Hospital Zurich (USZ) and University of Zurich (UZH)ZurichCH‐8091Switzerland
| | - Sotiris E. Pratsinis
- Particle Technology LaboratoryDepartment of Mechanical and Process EngineeringETH ZurichZurichCH‐8092Switzerland
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12
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4-Dialkylamino-2,5-dihydroimidazol-1-oxyls with Functional Groups at the Position 2 and at the Exocyclic Nitrogen: The pH-Sensitive Spin Labels. Gels 2021; 8:gels8010011. [PMID: 35049546 PMCID: PMC8774874 DOI: 10.3390/gels8010011] [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: 12/02/2021] [Revised: 12/17/2021] [Accepted: 12/17/2021] [Indexed: 11/16/2022] Open
Abstract
Local acidity and electrostatic interactions are associated both with catalytic properties and the adsorption activity of various materials, and with the vital functions of biomolecules. The observation of acid–base equilibria in stable free radicals using EPR spectroscopy represents a convenient method for monitoring pH changes and the investigation of surface electrostatics, the advantages of which are especially evident in opaque and turbid samples and in porous materials such as xerogels. Imidazoline nitroxides are the most commonly used pH-sensitive spin probes and labels due to the high sensitivity of the parameters of the EPR spectra to pH changes, their small size, and their well-developed chemistry. In this work, several new derivatives of 4-(N,N-dialkylamino)-2,5-dihydrioimidazol-1-oxyl, with functional groups suitable for specific binding, were synthesized. The dependence of the parameters of their EPR spectra on pH was studied. Several showed a pKa close to 7.4, following the pH changes in a normal physiological range, and some demonstrated a monotonous change of the hyperfine coupling constant by 0.14 mT upon pH variation by four units.
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13
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Tamura M, Doi Y, Li Y, Nakagawa Y, Tomishige K. Effective Heterogeneous MoO
x
‐Modified CeO
2
Catalyst for Michael Addition of Dimethyl Malonate to 2‐Cyclohexen‐1‐one. ChemCatChem 2021. [DOI: 10.1002/cctc.202100682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Masazumi Tamura
- Research Center for Artificial Photosynthesis Osaka City University 3-3-138, Sugimoto Sumiyoshi-ku, Osaka 558-8585 Japan
| | - Yamato Doi
- Department of Applied Chemistry School of Engineering Tohoku University 6-6-07, Aoba, Aramaki Aoba-ku, Sendai 980-8579 Japan
| | - Yingai Li
- Department of Applied Chemistry School of Engineering Tohoku University 6-6-07, Aoba, Aramaki Aoba-ku, Sendai 980-8579 Japan
| | - Yoshinao Nakagawa
- Department of Applied Chemistry School of Engineering Tohoku University 6-6-07, Aoba, Aramaki Aoba-ku, Sendai 980-8579 Japan
| | - Keiichi Tomishige
- Department of Applied Chemistry School of Engineering Tohoku University 6-6-07, Aoba, Aramaki Aoba-ku, Sendai 980-8579 Japan
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14
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Phosphate Enrichment of Niobium-Based Catalytic Surfaces in Relation to Reactions of Carbohydrate Biomass Conversion: The Case Studies of Inulin Hydrolysis and Fructose Dehydration. Catalysts 2021. [DOI: 10.3390/catal11091077] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In this work, some physical mixtures of Nb2O5·nH2O and NbOPO4 were prepared to study the role of phosphate groups in the total acidity of samples and in two reactions involving carbohydrate biomass: hydrolysis of polyfructane and dehydration of fructose/glucose to 5-hydroxymethylfurfural (HMF). The acid and catalytic properties of the mixtures were dominated by the phosphate group enrichment. Lewis and Brønsted acid sites were detected by FT-IR experiments with pyridine adsorption/desorption under dry and wet conditions. Lewis acidity decreased with NbP in the composition, while total acidity of the samples, measured by titrations with phenylethylamine in cyclohexane (~3.5 μeq m−2) and water (~2.7 μeq m−2), maintained almost the same values. Inulin conversion took advantage of the presence of surfaces rich in Brønsted sites, and NbOPO4 showed the best hydrolysis activity with glucose/fructose formation. The catalyst with a more phosphated surface showed less deactivation during the dehydration of fructose/glucose into HMF.
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Antonov DO, Tambasova DP, Shishmakov AB, Kirilyuk IA, Kovaleva EG. Acidic and Electrosurface Properties of Binary TiO 2-SiO 2 Xerogels Using EPR of pH-Sensitive Nitroxides. Gels 2021; 7:119. [PMID: 34449616 PMCID: PMC8395927 DOI: 10.3390/gels7030119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 11/16/2022] Open
Abstract
The binary xerogels TiO2-SiO2 are widely used as catalysts and their carriers in organic synthesis. Characterization and adjustment of the electrostatic properties of the surface and the local acidity inside the pores, are necessary for the further development of TiO2-SiO2 xerogels applications. This research investigates acid-base equilibria in the pores, and the surface electrostatic potential (SEP) of binary TiO2-SiO2 xerogels, by the EPR of stable pH-sensitive nitroxide radicals. These radicals are small enough to penetrate directly into the pores, and to be adsorbed onto the surface of the material under study. This makes it possible to obtain valuable information on the acidic and electrosurface properties of the studied system. The highest negative surface electrical charge associated with surface electrical potential (SEP) was equal to -196 ± 6 mV. It was induced by the surface of the sample with a 7% TiO2 content. The local acidity inside the pores of this sample was found to be higher, by approximately 1.49 pH units, as compared to that in the external bulk solution.
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Affiliation(s)
- Denis O. Antonov
- Institute of Chemical Engineering, Ural Federal University Named after the First President of Russia B N Yeltsin, Mira St., 19, 620002 Yekaterinburg, Russia; (D.P.T.); (E.G.K.)
| | - Daria P. Tambasova
- Institute of Chemical Engineering, Ural Federal University Named after the First President of Russia B N Yeltsin, Mira St., 19, 620002 Yekaterinburg, Russia; (D.P.T.); (E.G.K.)
| | - Andrey B. Shishmakov
- Laboratory of Organic Materials, I. Ya. Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Akademicheskaya/S. Kovalevskoy, 22/20, 620990 Ekaterinburg, Russia;
| | - Igor A. Kirilyuk
- Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Akad. Lavrent’ev Av. 9, 630090 Novosibirsk, Russia;
| | - Elena G. Kovaleva
- Institute of Chemical Engineering, Ural Federal University Named after the First President of Russia B N Yeltsin, Mira St., 19, 620002 Yekaterinburg, Russia; (D.P.T.); (E.G.K.)
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Moulavi M, Kanade K, Amalnerkar D, Fatehmulla A, Aldhafiri AM, Aslam Manthrammel M. Synergistic surface basicity enhancement effect for doping of transition metals in nanocrystalline MgO as catalysts towards one pot Wittig reaction. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103134] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Kiani D, Baltrusaitis J. A Spectroscopic Study of Supported‐Phosphate‐Catalysts (SPCs): Evidence of Surface‐mediated Hydrogen‐Transfer. ChemCatChem 2021. [DOI: 10.1002/cctc.202001897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Daniyal Kiani
- Department of Chemical & Biomolecular Engineering Lehigh University Bethlehem PA-18015 USA
| | - Jonas Baltrusaitis
- Department of Chemical & Biomolecular Engineering Lehigh University Bethlehem PA-18015 USA
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CO2 Hydrogenation to Methane over Ni-Catalysts: The Effect of Support and Vanadia Promoting. Catalysts 2021. [DOI: 10.3390/catal11040433] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Within the Waste2Fuel project, innovative, high-performance, and cost-effective fuel production methods are developed to target the “closed carbon cycle”. The catalysts supported on different metal oxides were characterized by XRD, XPS, Raman, UV-Vis, temperature-programmed techniques; then, they were tested in CO2 hydrogenation at 1 bar. Moreover, the V2O5 promotion was studied for Ni/Al2O3 catalyst. The precisely designed hydrotalcite-derived catalyst and vanadia-promoted Ni-catalysts deliver exceptional conversions for the studied processes, presenting high durability and selectivity, outperforming the best-known catalysts. The equilibrium conversion was reached at temperatures around 623 K, with the primary product of reaction CH4 (>97% CH4 yield). Although the Ni loading in hydrotalcite-derived NiWP is lower by more than 40%, compared to reference NiR catalyst and available commercial samples, the activity increases for this sample, reaching almost equilibrium values (GHSV = 1.2 × 104 h–1, 1 atm, and 293 K).
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Phichairatanaphong O, Teepakakorn P, Poo-arporn Y, Chareonpanich M, Donphai W. Infiltrate Mesoporous Silica-Aluminosilicate Structure Improves Hydrogen Production via Methane Decomposition over a Nickel-Based Catalyst. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c06355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Orrakanya Phichairatanaphong
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | - Pornphrom Teepakakorn
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | | | - Metta Chareonpanich
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Research Network of NANOTEC − KU on NanoCatalysts and NanoMaterials for Sustainable Energy and Environment, Kasetsart University, Bangkok 10900, Thailand
| | - Waleeporn Donphai
- KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Research Network of NANOTEC − KU on NanoCatalysts and NanoMaterials for Sustainable Energy and Environment, Kasetsart University, Bangkok 10900, Thailand
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Abstract
The heterocyclic molecules are medicinally important and are applied in different
other fields. The environmentally benign synthetic method for the synthesis of this
important group of compounds is always explored. Bimetallic nanoparticles are getting
attention as heterogeneous catalysts for their synthesis. The bimetallic nanoparticles have
been usually synthesized by chemical or physical methods or both in combination. Chemists
are also using part of plants in the synthesis of bimetallic nanoparticles and these have
been successful. The present review work will be going to enrich the existing literature by
compiling the use of plant parts in the synthesis of bimetallic nanoparticles and their utility
in the synthesis of heterocyclic molecules.
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Affiliation(s)
- Poonam
- Department of Applied Chemistry, Delhi Technological University, Delhi-110 042, India
| | - Ram Singh
- Department of Applied Chemistry, Delhi Technological University, Delhi-110 042, India
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Progress on Modified Calcium Oxide Derived Waste-Shell Catalysts for Biodiesel Production. Catalysts 2021. [DOI: 10.3390/catal11020194] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The dwindling of global petroleum deposits and worsening environmental issues have triggered researchers to find an alternative energy such as biodiesel. Biodiesel can be produced via transesterification of vegetable oil or animal fat with alcohol in the presence of a catalyst. A heterogeneous catalyst at an economical price has been studied widely for biodiesel production. It was noted that various types of natural waste shell are a potential calcium resource for generation of bio-based CaO, with comparable chemical characteristics, that greatly enhance the transesterification activity. However, CaO catalyzed transesterification is limited in its stability and studies have shown deterioration of catalytic reactivity when the catalyst is reused for several cycles. For this reason, different approaches are reviewed in the present study, which focuses on modification of waste-shell derived CaO based catalyst with the aim of better transesterification reactivity and high reusability of the catalyst for biodiesel production. The catalyst stability and leaching profile of the modified waste shell derived CaO is discussed. In addition, a critical discussion of the structure, composition of the waste shell, mechanism of CaO catalyzed reaction, recent progress in biodiesel reactor systems and challenges in the industrial sector are also included in this review.
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Essehaity ASM, Abd ElHafiz DR, Aman D, Mikhail S, Abdel-Monem YK. Oxidative coupling of bio-alcohols mixture over hierarchically porous perovskite catalysts for sustainable acrolein production. RSC Adv 2021; 11:28961-28972. [PMID: 35478557 PMCID: PMC9038184 DOI: 10.1039/d1ra05627a] [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: 07/22/2021] [Accepted: 08/17/2021] [Indexed: 11/26/2022] Open
Abstract
The acrolein production from bio-alcohols methanol and ethanol mixtures using AMnO3 (since A = Ba and/or Sr) perovskite catalysts was studied. All the prepared samples were characterized by XRD, XPS, N2 sorption, FTIR, Raman spectroscopy, TEM, SEM, TGA, and NH3–CO2-TPD. The catalytic oxidation reaction to produce acrolein has occurred via two steps, the alcohols are firstly oxidized to corresponding aldehydes, and then the aldol is coupled with the produced aldehydes. The prepared perovskite samples were modified by doping A (Sr) position with (Ba) to improve the aldol condensation. The most catalytic performance was achieved using the BaSrMnO3 sample in which the acrolein selectivity reached 62% (T = 300 °C, MetOH/EtOH = 1, LHSV = 10 h−1). The increase in acrolein production may be related to the high tendency of BaSrMnO3 toward C–C coupling formation. The C–C tendency attributes to that modification have occurred in acid/base sites because of metal substitution. The figure illustrates the potential of perovskite as a catalyst for acrolein production via simultaneous oxidative coupling of renewable alcohols (ethanol and methanol) followed by aldol condensation of pre-formed aldehydes to form acrolein.![]()
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Affiliation(s)
- Al-Shaimaa M. Essehaity
- Catalysis Laboratory, Refining Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727, Cairo, Egypt
| | - Dalia R. Abd ElHafiz
- Catalysis Laboratory, Refining Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727, Cairo, Egypt
| | - Delvin Aman
- Catalysis Laboratory, Refining Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727, Cairo, Egypt
- EPRI-Nanotechnology Center, Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727, Cairo, Egypt
| | - Sara Mikhail
- Catalysis Laboratory, Refining Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727, Cairo, Egypt
| | - Yasser K. Abdel-Monem
- Department of Chemistry, Faculty of Science, Menoufia University, 32511, Shebin El-Kom, Menoufia, Egypt
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Vlasenko NV, Stryzhak PE. Role of the Morphology of Sulfonic Resin Catalysts in the Etherification of Ethanol with iso-Butylene: A Review. THEOR EXP CHEM+ 2020. [DOI: 10.1007/s11237-020-09661-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Ude CN, Onukwuli DO, Umeuzuegbu JC, Chukwuka CC. Heterogeneously Catalyzed Methanolysis of Gmelina Seed Oil to Biodiesel. Chem Eng Technol 2020. [DOI: 10.1002/ceat.202000080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Callistus Nonso Ude
- Michael Okpara University of Agriculture Umudike (MOUAU) Department of Chemical Engineering Umuahia Abia Nigeria
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25
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An Eco-Friendly Fluidizable FexOy/CaO-γ-Al2O3 Catalyst for Tar Cracking during Biomass Gasification. Catalysts 2020. [DOI: 10.3390/catal10070806] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The present study deals with the development, characterization, and performance evaluation of an eco-friendly catalyst, using 2-methoxy-4-methylphenol (2M4MP) as a surrogate tar. The 2M4MP was selected due to its chemical functionalities and the fact that it is a good model compound to represent the tar formed during biomass low temperature gasification. The eco-friendly catalyst was prepared using the typical Fe and Ca minerals which are present in ash. These ash components were added to a fluidizable γ-Al2O3 support using a multistep incipient impregnation, yielding Fe oxides as an active phase and CaO as the promoter. The prepared catalyst displayed a 120 m2/g BET specific surface area, with few γ-Al2O3 bulk phase changes, as observed with XRD. TPD-NH3 and pyridine FTIR allowed us to show the significant influence of CaO reduced support acidity. A TPR analysis provided evidence of catalyst stability during consecutive reduction–oxidation cycles. Furthermore, catalyst evaluation vis-à-vis catalytic steam 2M4MP gasification was performed using the fluidized CREC riser simulator. The obtained results confirm the high performance of the developed catalyst, with 2M4MP conversion being close to 100% and with selectivities of up to 98.6% for C1-C2 carbon-containing species, at 500 °C, with a 7.5 s reaction time and 1.5 g steam/g 2M4MP. These high tar conversions are promising efficiency indicators for alumina catalysts doped with Fe and Ca. In addition, the used catalyst particles could be blended with biochar to provide an integrated solid supplement that could return valuable mineral supplements to the soil.
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27
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Busca G, Gervasini A. Solid acids, surface acidity and heterogeneous acid catalysis. ADVANCES IN CATALYSIS 2020. [DOI: 10.1016/bs.acat.2020.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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28
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Acid sites on silica-supported molybdenum oxides probed by ammonia adsorption: Experiment and theory. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110580] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Molecules and heterostructures at TiO2 surface: the cases of H2O, CO2, and organic and inorganic sensitizers. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-04003-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kerru N, Bhaskaruni SVHS, Gummidi L, Maddila SN, Maddila S, Jonnalagadda SB. Recent advances in heterogeneous catalysts for the synthesis of imidazole derivatives. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1639755] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Nagaraju Kerru
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | | | - Lalitha Gummidi
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | | | - Suresh Maddila
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
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31
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Ude CN, Onukwuli OD. Kinetic modeling of transesterification of gmelina seed oil catalyzed by alkaline activated clay (NaOH/clay) catalyst. REACTION KINETICS MECHANISMS AND CATALYSIS 2019. [DOI: 10.1007/s11144-019-01604-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Kerru N, Bhaskaruni SVHS, Gummidi L, Maddila SN, Singh P, Jonnalagadda SB. Efficient synthesis of novel pyrazole-linked 1,2,4-triazolidine-3-thiones using bismuth on zirconium oxide as a recyclable catalyst in aqueous medium. Mol Divers 2019; 24:345-354. [PMID: 31098860 DOI: 10.1007/s11030-019-09957-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 05/08/2019] [Indexed: 11/24/2022]
Abstract
The Bi2O3 loading on ZrO2 as heterogeneous catalyst was established as an extremely efficient catalyst for the synthesis of a series of novel 5-(1-(2,4-dinitrophenyl)-3-substituted-phenyl-1H-pyrazol-4-yl)-1,2,4-triazolidine-3-thione derivatives (3a-o) with high yields (90-96%) by reaction of 1-(2,4-dinitrophenyl)-3-substituted-phenyl-1H-pyrazole-4-carbaldehydes and thiosemicarbazide using water as a greener solvent at 80 °C within 30-45 min. Materials with different percentages of Bi2O3 on ZrO2 were prepared by simple wet impregnation method. The synthesized material has been characterized by various techniques (XRD, TEM, SEM, BET). 2.5% Bi2O3/ZrO2 proved superior catalyst. The Bi2O3/ZrO2 catalyst is easily recoverable and reused up to sixth run with no loss of activity. Excellent yields, short reaction time, avoidance of hazardous solvents, and no need for chromatographic purifications are the proven advantages.
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Affiliation(s)
- Nagaraju Kerru
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, 4000, South Africa
| | - Sandeep V H S Bhaskaruni
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, 4000, South Africa
| | - Lalitha Gummidi
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, 4000, South Africa
| | - Surya Narayana Maddila
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, 4000, South Africa
| | - Parvesh Singh
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, 4000, South Africa
| | - Sreekantha B Jonnalagadda
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, 4000, South Africa.
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Marciniak AA, Alves OC, Appel LG, Mota CJ. Synthesis of dimethyl carbonate from CO2 and methanol over CeO2: Role of copper as dopant and the use of methyl trichloroacetate as dehydrating agent. J Catal 2019. [DOI: 10.1016/j.jcat.2019.01.035] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Acid strength measurements of Amberlyst 15 resin, p-xylene-2-sulfonic acid and chlorosulfonic and sulfuric acid treated SiO2, Al2O3, TiO2 and MgO. REACTION KINETICS MECHANISMS AND CATALYSIS 2019. [DOI: 10.1007/s11144-019-01551-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Campisi S, Ferri M, Chan-Thaw CE, Sanchez Trujillo FJ, Motta D, Tabanelli T, Dimitratos N, Villa A. Metal-Support Cooperative Effects in Au/VPO for the Aerobic Oxidation of Benzyl Alcohol to Benzyl Benzoate. NANOMATERIALS 2019; 9:nano9020299. [PMID: 30791618 PMCID: PMC6410264 DOI: 10.3390/nano9020299] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/11/2019] [Accepted: 02/15/2019] [Indexed: 01/29/2023]
Abstract
This paper studies the cooperative effect of Au nanoparticles deposited on vanadyl pyrophosphate oxide (VPO) in the liquid phase oxidation of benzyl alcohol. VPO was prepared using the classical method by thermally treating VOHPO4·0.5H2O precursor in reacting atmosphere at 420 °C for a period of 72 h. Au nanoparticles were deposited by incipient wetness method. The catalysts were characterized by means of XRD, TEM, XPS and Raman. The bulk VPO catalyst contains vanadyl pyrophosphate phase ((VO)2P2O7), and a small amount of VOPO4. The catalytic system exhibits a high activity in the base-free liquid phase oxidation of alcohols compared to Au on activated carbon, classic catalyst used for this type of reaction. Au/VPO showed a high peculiar selectivity to benzyl benzoate (76%), an important product used in the pharmaceutical and perfume industries. This behavior might be ascribed to the presence of strong acid sites of VPO, as determined by liquid phase titration. Stability tests performed on Au/VPO showed a deactivation of 10% after the first run, but a constant conversion along the following five cycles. This phenomenon can be attributed to the increase of mean Au particle size (from 19.1 to 23.4 nm) after recycling tests as well as the partial leaching of Au and V in the reaction media. Moreover, XRD evidenced a modification in the VPO structure with the partial formation of VOHPO4·0.5H2O phase.
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Affiliation(s)
- Sebastiano Campisi
- Università degli Studi di Milano, Dipartimento di Chimica, Via C. Golgi 19, 20133 Milano, Italy.
| | - Michele Ferri
- Università degli Studi di Milano, Dipartimento di Chimica, Via C. Golgi 19, 20133 Milano, Italy.
| | - Carine E Chan-Thaw
- Institut pour la Maîtrise de l'Énergie⁻Université d'Antananarivo BP 566, 101 Antananarivo, Madagascar.
| | - Felipe J Sanchez Trujillo
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.
| | - Davide Motta
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.
| | - Tommaso Tabanelli
- Dipartimento di Chimica Industriale e dei Materiali, ALMA MATER STUDIORUM Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale e dei Materiali, ALMA MATER STUDIORUM Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.
| | - Alberto Villa
- Università degli Studi di Milano, Dipartimento di Chimica, Via C. Golgi 19, 20133 Milano, Italy.
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De Carvalho GSG, Chagas LH, Fonseca CG, de Castro PP, Sant’Ana AC, Leitão AA, Amarante GW. Nb 2O 5 supported on mixed oxides catalyzed oxidative and photochemical conversion of anilines to azoxybenzenes. NEW J CHEM 2019. [DOI: 10.1039/c9nj00625g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Supported niobium oxide as an efficient heterogeneous catalyst for chemoselective preparation of azoxybenzenes from anilines.
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Affiliation(s)
| | | | - Carla Grijó Fonseca
- Chemistry Department
- Federal University of Juiz de Fora
- Cidade Universitária
- Juiz de Fora
- Brazil
| | - Pedro Pôssa de Castro
- Chemistry Department
- Federal University of Juiz de Fora
- Cidade Universitária
- Juiz de Fora
- Brazil
| | - Antônio Carlos Sant’Ana
- Chemistry Department
- Federal University of Juiz de Fora
- Cidade Universitária
- Juiz de Fora
- Brazil
| | - Alexandre Amaral Leitão
- Chemistry Department
- Federal University of Juiz de Fora
- Cidade Universitária
- Juiz de Fora
- Brazil
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Green synthetic methodology: An evaluative study for impact of surface basicity of MnO2 doped MgO nanocomposites in Wittig reaction. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.09.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chagas LH, Matheus CR, Zonetti PC, Appel LG. Butadiene from ethanol employing doped t-ZrO2. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.01.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Onukwuli OD, Ude CN. Kinetics of African pear seed oil (APO) methanolysis catalyzed by phosphoric acid-activated kaolin clay. APPLIED PETROCHEMICAL RESEARCH 2018. [DOI: 10.1007/s13203-018-0210-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Bhaskaruni SVHS, Maddila S, van Zyl WE, Jonnalagadda SB. Ag₂O on ZrO₂ as a Recyclable Catalyst for Multicomponent Synthesis of Indenopyrimidine Derivatives. Molecules 2018; 23:E1648. [PMID: 29976914 PMCID: PMC6100188 DOI: 10.3390/molecules23071648] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/02/2018] [Accepted: 07/03/2018] [Indexed: 11/18/2022] Open
Abstract
We describe the synthesis of silver loaded on zirconia and its use as an efficient catalyst for a one-pot three-component reaction to synthesize 11 indenopyrimidine derivatives, of which 7 are new compounds. The procedure involves substituted benzaldehydes, indane-1,3-dione, and guanidinium hydrochloride, with ethanol as solvent. The proposed green protocol at room temperature is simple and efficient, giving excellent yields (90⁻96%) in short reaction times (<30 min). The protocol works well according to the green chemistry principles with respect to high atom economy, no need for column separation, and reusability of the catalyst, which are attractive features. XRD, TEM, SEM, and BET analysis were used to characterize the catalyst materials.
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Affiliation(s)
- Sandeep V H S Bhaskaruni
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban 4000, South Africa.
| | - Suresh Maddila
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban 4000, South Africa.
| | - Werner E van Zyl
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban 4000, South Africa.
| | - Sreekantha B Jonnalagadda
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban 4000, South Africa.
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Mortén M, Mentel Ł, Lazzarini A, Pankin IA, Lamberti C, Bordiga S, Crocellà V, Svelle S, Lillerud KP, Olsbye U. A Systematic Study of Isomorphically Substituted H-MAlPO-5 Materials for the Methanol-to-Hydrocarbons Reaction. Chemphyschem 2018; 19:484-495. [PMID: 29250897 PMCID: PMC5838544 DOI: 10.1002/cphc.201701024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 10/24/2017] [Indexed: 11/29/2022]
Abstract
Substituting metals for either aluminum or phosphorus in crystalline, microporous aluminophosphates creates Brønsted acid sites, which are well known to catalyze several key reactions, including the methanol to hydrocarbons (MTH) reaction. In this work, we synthesized a series of metal-substituted aluminophosphates with AFI topology that differed primarily in their acid strength and that spanned a predicted range from high Brønsted acidity (H-MgAlPO-5, H-CoAlPO-5, and H-ZnAlPO-5) to medium acidity (H-SAPO-5) and low acidity (H-TiAlPO-5 and H-ZrAlPO-5). The synthesis was aimed to produce materials with homogenous properties (e.g. morphology, crystallite size, acid-site density, and surface area) to isolate the influence of metal substitution. This was verified by extensive characterization. The materials were tested in the MTH reaction at 450 °C by using dimethyl ether (DME) as feed. A clear activity difference was found, for which the predicted stronger acids converted DME significantly faster than the medium and weak Brønsted acidic materials. Furthermore, the stronger Brønsted acids (Mg, Co and Zn) produced more light alkenes than the weaker acids. The weaker acids, especially H-SAPO-5, produced more aromatics and alkanes, which indicates that the relative rates of competing reactions change upon decreasing the acid strength.
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Affiliation(s)
- Magnus Mortén
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloP.O. Box 1033, Blindern0315OsloNorway
| | - Łukasz Mentel
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloP.O. Box 1033, Blindern0315OsloNorway
| | - Andrea Lazzarini
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloP.O. Box 1033, Blindern0315OsloNorway
| | - Ilia A. Pankin
- Department of ChemistryCrisDi Interdepartmental Centre, and INSRM referenceUniversity of Turinvia Pietro Giuria 710125TurinItaly
- International Research Center “Smart Materials”Southern Federal UniversityZorge Street 5344090Rostov-on-DonRussia
| | - Carlo Lamberti
- Department of ChemistryCrisDi Interdepartmental Centre, and INSRM referenceUniversity of Turinvia Pietro Giuria 710125TurinItaly
- International Research Center “Smart Materials”Southern Federal UniversityZorge Street 5344090Rostov-on-DonRussia
| | - Silvia Bordiga
- Department of ChemistryCrisDi Interdepartmental Centre, and INSRM referenceUniversity of Turinvia Pietro Giuria 710125TurinItaly
| | - Valentina Crocellà
- Department of ChemistryCrisDi Interdepartmental Centre, and INSRM referenceUniversity of Turinvia Pietro Giuria 710125TurinItaly
| | - Stian Svelle
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloP.O. Box 1033, Blindern0315OsloNorway
| | - Karl Petter Lillerud
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloP.O. Box 1033, Blindern0315OsloNorway
| | - Unni Olsbye
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloP.O. Box 1033, Blindern0315OsloNorway
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Dai QL, Yan B, Liang Y, Xu BQ. Water effects on the acidic property of typical solid acid catalysts by 3,3-dimethylbut-1-ene isomerization and 2-propanol dehydration reactions. Catal Today 2017. [DOI: 10.1016/j.cattod.2017.05.084] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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45
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Zheng A, Liu SB, Deng F. 31P NMR Chemical Shifts of Phosphorus Probes as Reliable and Practical Acidity Scales for Solid and Liquid Catalysts. Chem Rev 2017; 117:12475-12531. [DOI: 10.1021/acs.chemrev.7b00289] [Citation(s) in RCA: 196] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anmin Zheng
- State
Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,
National Center for Magnetic Resonance in Wuhan, Key Laboratory of
Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
| | - Shang-Bin Liu
- Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Feng Deng
- State
Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,
National Center for Magnetic Resonance in Wuhan, Key Laboratory of
Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
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Iwanek E, Ulkowska U, Gliński M. Magnesium oxide modified with various iodine-containing compounds--Surface studies. SURF INTERFACE ANAL 2017. [DOI: 10.1002/sia.6248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ewa Iwanek
- Faculty of Applied Science and Technology; Sheridan College; 7899 McLaughlin Rd Oakville Ontario Canada
| | - Urszula Ulkowska
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 Warsaw Poland
| | - Marek Gliński
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 Warsaw Poland
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de Lima AF, Zonetti PC, Rodrigues CP, Appel LG. The first step of the propylene generation from renewable raw material: Acetone from ethanol employing CeO 2 doped by Ag. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.04.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Heterogeneous Partial (amm)Oxidation and Oxidative Dehydrogenation Catalysis on Mixed Metal Oxides. Catalysts 2016. [DOI: 10.3390/catal6020022] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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