Novel porous SiO2@SiC core-shell nanospheres functionalized with an amino hybrid of WO3 as an oxidative desulfurization catalyst

Gomi, Leila Seifikar; Afsharpour, Maryam; Lianos, Panagiotis

doi:10.1016/j.jiec.2020.06.019

Cited by 20 publications

(12 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, SiC structures and N-doped SiC networks, in particular, allowed an increase in the electron density on peroxo groups hence decreasing the energy barrier associated with the oxidation process . To accomplish their catalytic purposes, the same group has also reported on the synthesis of SiO 2 @SiC core–shell nanospheres and their subsequent surface engineering with WO 3 single-atom moieties or–as an alternative–porous MoO 3 @SiC hollow spheres to be employed in ODS always with superior performance with respect to functionalized silica nanospheres and MoO 2 @C counterparts, respectively.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

View full text Add to dashboard Cite

There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

show abstract

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The sulfur removal of MoO 3 /Al 2 O 3 (86.13) was higher than MoO 3 /SiO 2 -Al 2 O 3 (35.63). The MO catalysts can be supported on different supports such as Al 2 O 3 , SiO 2 -Al 2 O 3 , TiO 2 , Fe 3 O 4 , Fe 3 O 4 @SiO 2 , macroporous polyacrylic cationic exchange resin D113, graphene-like hexagonal BN nanosheets, silica gel, multiwalled carbon nanotubes (MWCNTs), magnetic-reduced graphene oxide (MrGO), graphite carbon, carbon nitride (g-C 3 N 4 ), CMK-3, SBA-15, MCM-41, silicon carbide (SiC), zirconia (ZrO 2 ), HY zeolite, magnetic mesoporous silica (MMS), and so on. It is shown that the support increases the catalytic activity and accessibility of metal oxides.…”

Section: Catalytic Oxidative–extractive Desulfurizationmentioning

confidence: 99%

“…It is shown that the support increases the catalytic activity and accessibility of metal oxides. Seifikar Gomi et al studied the desulfurization of model fuel (T, BT, DBT in n -octane) with an H 2 O 2 oxidant in the presence of a WO 3 catalyst. SiC, SiO 2 -SiC, and NH 2 -SiO 2 -SiC were used as supports of the WO 3 catalyst.…”

Section: Catalytic Oxidative–extractive Desulfurizationmentioning

confidence: 99%

“…Some ILs can act as both extractant and catalyst such as [Omim][HSO 4 ], [BPy][BF 4 ], and [EimC 4 SO 3 H]NTf 2 . Some ILs can be applied as only catalysts such as [Cn(mim) 2 ]Cl 2 /mFeCl 3 , [EMIM][NiCl 2 ], [EMIM][CoCl 2 ], [EMIM][MnCl 2 ], [PW 12 O 40 ], − …”

Section: Catalytic Oxidative–extractive Desulfurizationmentioning

confidence: 99%

“…It is shown that the support increases the catalytic activity and accessibility of metal oxides. Seifikar Gomi et al 49 Then, hydroperoxomolybdate forms the peroxo (V) during the elimination of t-butanol (IV). Since sulfur atoms have a higher electron density, the oxidation of sulfur atoms of DBT (VI) is preceded by a nucleophilic attack of the sulfur atom on peroxo species (V) to form a regenerated peroxo species and sulfoxide species (VII).…”

Section: Catalytic Oxidative−extractive Desulfurizationmentioning

confidence: 99%

See 2 more Smart Citations

Key Factors Affecting the Development of Oxidative Desulfurization of Liquid Fuels: A Critical Review

et al. 2021

View full text Add to dashboard Cite

Complete and effective sulfur removal from liquid fuels is essential to meet the sulfur standard requirements. The oxidative desulfurization (ODS) process has been extensively used for the desulfurization of liquid fuels. In the current study, a comprehensive survey was conducted on the most important factors of ODS, including the types of catalysts, oxidizing agents, extraction solvents, liquid fuels, and process operating conditions. Various types of catalysts, nanocatalysts, magnetic catalysts, photocatalysts, electrocatalysts, biocatalysts, and emulsion catalytic systems have been studied in the ODS process. According to the obtained results, desulfurization catalysts were categorized into 11 groups, including metal oxides, metal complexes, metal free, titanosilicates, ionic liquids, polyoxometalates, metal−organic frameworks, porous aromatic frameworks, covalent organic frameworks, enzymes, and Fenton and Fenton-like catalysts. The advantages and drawbacks of the ODS catalysts were reviewed. The results indicate that the development of experimental design, modeling, and simulation in the ODS process helps to identify the most important variables, facilitate future research, and achieve maximum sulfur removal. Using technologies assisted with ODS such as ultrasound, cold plasma, microwave radiation, hydrodynamic cavitation, photo/light, electrochemistry, magnetic field, and biotechnology can improve sulfur removal and reduce reaction time.

show abstract

Reduction system “vitamin C/glycerol” promoted copper(II)‐catalyzed N‐arylation

Yan

et al. 2022

Applied Organom Chemis

View full text Add to dashboard Cite

The common access to forming CN bond is the copper‐catalyzed Ullmann‐type reaction. The relatively expensive and easily oxidized copper(I) is usually used in the reaction. Our group discovered that the “vitamin C/glycerol” reduction system could convert cheap and stable CuO to active low valence state copper species, as measured via X‐ray photoelectron spectroscopy (XPS), to promote the CN coupling reaction. In particular, 2‐phenylindole, pyrrolo[1,2‐a]quinoxaline, 1,2,4‐triazole and 4‐amino‐7H‐pyrrolo[2,3‐d]pyrimidine derivative were obtained in the presence of CuO and reduction system “vitamin C/glycerol.” This method provided a simple and cost‐effective approach to the preparation of N‐arylation products.

show abstract

Novel porous SiO2@SiC core-shell nanospheres functionalized with an amino hybrid of WO3 as an oxidative desulfurization catalyst

Cited by 20 publications

References 26 publications

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Key Factors Affecting the Development of Oxidative Desulfurization of Liquid Fuels: A Critical Review

Reduction system “vitamin C/glycerol” promoted copper(II)‐catalyzed N‐arylation

Contact Info

Product

Resources

About