Theoretical study of catalytic decomposition of acetic acid on MgO nanosurface

Perera, Duwage; Hewage, Jinasena W.; Silva, K.M. Nalin de

doi:10.1016/j.comptc.2015.04.011

Cited by 10 publications

(9 citation statements)

References 42 publications

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“…Takahashi et al 12 reported that the deep level defects in MgO are usually created by impurities and vacancy complexes lie in 1.4-4.6 eV. Perera et al 13 found that this band can be present in MgO microcrystals and centered at 2.8 eV. These authors have associated the above bands to Mg interstates.…”

Section: Photoluminescence Spectramentioning

confidence: 98%

A comparative study on the morphological features of highly ordered MgO:AgO nanocube arrays prepared via a hydrothermal method

et al. 2015

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II-VI semiconductor nanotubes are a recently developed class of nanomaterials whose unique photophysical properties are helping to create a new generation of nanomaterials in the field of photonics and microelectronics. In this report, we examine the progress in adapting these nanomaterials for several optoelectronics applications followed by characterization studies. Magnesium oxide and silver oxide (MgO:AgO) nanoparticles were synthesized using a hydrothermal method by taking magnesium nitrate, silver oxide and glycine. X-ray diffraction (XRD) results showed that the peaks are consistent with a pure phase cubic structure of MgO. The XRD pattern also confirmed the crystallinity and phase purity of the sample. Nanocrystal sizes were found to be up to 25 nm as revealed by XRD and HRTEM.Photoluminescence measurement (PL) reveals the systematic shift of the emission band towards lower wavelength thereby ascertaining the quantum confinement effect.

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Section: Photoluminescence Spectramentioning

confidence: 98%

A comparative study on the morphological features of highly ordered MgO:AgO nanocube arrays prepared via a hydrothermal method

et al. 2015

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“…CO 2 was the predominant gas compound when using the NiWHZ catalyst (36.6 wt %), formed as an end product of decarboxylation of acetic acid, which catalytically decomposes releasing CO 2 and CH 4 through a competitive decarboxylation−dehydration mechanism. 37,52 On the other hand, given the lower activity of the CoMoHZ catalyst, the concentration of CH 4 (24.2 vol %) surpasses that of CO and CO 2 , indicating that less oxygen is being removed during HDO using this catalyst. Details on the total coke content and CK/TL ratios (as obtained from the deconvolution of the DTG−TPO curves in Figure S2) are provided in Figure 1c.…”

Section: ■ Resultsmentioning

confidence: 99%

“…The composition of the main gas products in Figure b reveals a significant concentration of CO and CO 2 (36.9 vol % and 25.3 vol %, respectively) using the PtPdHZ catalyst, which originate from decarbonylation (CO) and decarboxylation (CO 2 ) reactions, mostly. CO 2 was the predominant gas compound when using the NiWHZ catalyst (36.6 wt %), formed as an end product of decarboxylation of acetic acid, which catalytically decomposes releasing CO 2 and CH 4 through a competitive decarboxylation–dehydration mechanism. , On the other hand, given the lower activity of the CoMoHZ catalyst, the concentration of CH 4 (24.2 vol %) surpasses that of CO and CO 2 , indicating that less oxygen is being removed during HDO using this catalyst.…”

Section: Resultsmentioning

confidence: 99%

In-Depth Analysis of Raw Bio-Oil and Its Hydrodeoxygenated Products for a Comprehensive Catalyst Performance Evaluation

Hita

Cordero-Lanzac

Kekäläinen

et al. 2020

ACS Sustainable Chem. Eng.

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Biomass pyrolysis liquids (bio-oils) unavoidably require catalytic hydrodeoxygenation (HDO) for their upgrading and stabilization for commercial usage. The complex composition of bio-oil constrains the fundamental kinetic understanding of the HDO. Here, we propose a multi-technique methodology to compositionally assess the complete spectrum of the HDO reactants and products, and then use it to pre-evaluate different catalysts in the HDO of a raw bio-oil obtained from black poplar. The used techniques are: micro chromatography (GC), GC with mass spectrometry (MS), bidimensional GC×GC/MS, elemental analysis, gel permeation chromatography, Karl-Fischer, thermogravimetric analysis, as well as Fourier ion cyclotron resonance mass spectrometry (FT-ICR/MS) using different ionization sources (ESI and APPI). The latter technique allows for the assessment of the heaviest and most refractory oxygenates in bio-oil, which have a pivotal role in the HDO catalyst performance. Three activated carbon-supported catalysts based on PtPd, NiW and CoMo mixed with a commercial HZSM-5 zeolite were used. We have been able to evaluate the multiple facets of catalyst performance: production of gases, catalytic coke, thermal lignin and most importantly, the aqueous and organic product fractions (hydrodeoxygenation of heavy species and production of light aromatics). The results of the detailed analysis methodology highlight their potential for the understanding of the HDO mechanism and for a detailed catalyst screening.

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“…1.94% weight loss upon heating from room temperature to 165°C, which is due to the removal of adsorbed water on the surface of the product. e weight loss from 165°C to 500°C may be ascribed to the decomposition of the CH 3 COO − and NO 3 − anions, as the acetate and nitrate anions generally combust at about 350°C [44] and 192°C [45], respectively. e weight loss between 500°C and 1200°C is a result of the elimination of hydroxyls adsorbed on the surface.…”

Section: Characterizations Of Zro 2 Nanostructuresmentioning

confidence: 99%

Template‐Free Synthesis of Star‐Like ZrO₂ Nanostructures and Their Application in Photocatalysis

Tao

Hou

et al. 2018

Advances in Materials Science and Engineering

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Star-like nano-ZrO2 has been synthesized using Zr(NO3)4·5H2O as zirconium source by a hydrothermal process without any template and surfactant. The structure of the as-prepared ZrO2 powder was investigated by multiple advanced analytical methods. The results showed that CH3COO− and NO3− had great effects on the formation of star-like ZrO2 nanostructures. The as-prepared ZrO2 had a superior catalytic activity, and the reason for it was analyzed by UV-Vis diffuse reflectance spectroscopy. The effect of raw material ratios on the photocatalytic property of ZrO2 was studied. The synthesized ZrO2 showed a narrow bandgap (3.50–3.85 eV) and an excellent photocatalytic activity, and the degradation of RhB was up to nearly 100% in 30 min with this photocatalyst.

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Theoretical study of catalytic decomposition of acetic acid on MgO nanosurface

Cited by 10 publications

References 42 publications

A comparative study on the morphological features of highly ordered MgO:AgO nanocube arrays prepared via a hydrothermal method

A comparative study on the morphological features of highly ordered MgO:AgO nanocube arrays prepared via a hydrothermal method

In-Depth Analysis of Raw Bio-Oil and Its Hydrodeoxygenated Products for a Comprehensive Catalyst Performance Evaluation

Template‐Free Synthesis of Star‐Like ZrO₂ Nanostructures and Their Application in Photocatalysis

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Theoretical study of catalytic decomposition of acetic acid on MgO nanosurface

Cited by 10 publications

References 42 publications

A comparative study on the morphological features of highly ordered MgO:AgO nanocube arrays prepared via a hydrothermal method

A comparative study on the morphological features of highly ordered MgO:AgO nanocube arrays prepared via a hydrothermal method

In-Depth Analysis of Raw Bio-Oil and Its Hydrodeoxygenated Products for a Comprehensive Catalyst Performance Evaluation

Template‐Free Synthesis of Star‐Like ZrO2 Nanostructures and Their Application in Photocatalysis

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Template‐Free Synthesis of Star‐Like ZrO₂ Nanostructures and Their Application in Photocatalysis