Direct synthesis, characterization and catalytic performance of Al–Fe-SBA-15 materials in selective catalytic reduction of NO with NH3

Zhu, Lin; Qu, Hongxia; Zhang, Lei; Zhou, Qiangfei

doi:10.1016/j.catcom.2015.10.023

Cited by 16 publications

(11 citation statements)

References 30 publications

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“…Surface acid properties were analyzed by using pyridine (PY, total acid sites) and 2,6-dimethylpyridine (DMPY, Brønsted sites) [19]. The total acidity of all catalysts increased as compared to parent Al-SBA-15 materials (Table 1), due to an increase in both Brønsted and mostly Lewis acidity in the catalysts, in good agreement with previously reported results [19,20,27,28].…”

Section: Resultssupporting

confidence: 86%

“…All of these make the technique a more sustainable alternative to conventional syntheses. The synthesis of supported nanoparticles using this method has been previously reported by our research group [24,25,26,27,28], as well as other scientists [29] demonstrating the applicability and versatility for the production of nanomaterials with tunable sizes and shapes.…”

Section: Introductionmentioning

confidence: 91%

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Fe-Containing MOFs as Seeds for the Preparation of Highly Active Fe/Al-SBA-15 Catalysts in the N-Alkylation of Aniline

et al. 2019

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We have successfully incorporated iron species into mesoporous aluminosilicates (AlSBA15) using a simple mechanochemical milling method. The catalysts were characterized by nitrogen physisorption, inductively coupled plasma mass spectrometry (ICP-MS), pyridine (PY) and 2,6-dimethylpyridine (DMPY) pulse chromatography titration, powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX). The catalysts were tested in the N-alkylation reaction of aniline with benzyl alcohol for imine production. According to the results, the iron sources, acidity of catalyst and reaction conditions were important factors influencing the reaction. The catalyst showed excellent catalytic performance, achieving 97% of aniline conversion and 96% of imine selectivity under optimized conditions.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 91%

Fe-Containing MOFs as Seeds for the Preparation of Highly Active Fe/Al-SBA-15 Catalysts in the N-Alkylation of Aniline

et al. 2019

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“…(7)There is no need for a washing step (8)The addition of inorganic salts like KCl, NaCl. Na 2 SO 4 and K 2 SO 4 can accelerate and improve the synthesis while organic solvent additives may reduce the formation rate in acidic nonionic surfactant systems.…”

Section: (6) Only Few Examples For Phase Transformationmentioning

confidence: 99%

Synthesis,Mechanisms and Different Applications of Mesoporous Materials Based on Silica and Alumina

Gobara

2016

Egypt. J. Chem.

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ILICATE mesoporous materials have received widespread interest …..because of their potential applications. These novel materials, prepared either by soft-or hard-templating syntheses, become more and more important in many fields of science and technology such as adsorption, catalysis, separations, environmental processes, nanotechnology and biotechnology. According to IUPAC definition inorganic solids that contain pores with diameter in the size range of 2-50 nm are considered mesoporous materials, They also possess extremely high surface areas (>700 m 2 g −1) and narrow pore size distributions. This article review shows the current state of art and outlines the recent patents in mesoporous materials research in three general areas: synthesis, various mechanisms involved for porous structure formation and applications of mesoporous materials based on silica and alumina.

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“…The incorporation/doping of heteroatoms into the open silica framework has received considerable attention because of the need to develop more efficient and more stable materials for applications in catalysis, separation, coating and other fields . In particular, iron‐containing silica materials are remarkable heterogeneous catalysts for various reactions such as oxidation, acylation, alkylation, reduction, Fischer–Tropsch synthesis, polymerization, dehydrogenation and hydroformylation …”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9] In particular, iron-containing silica materials are remarkable heterogeneous catalysts for various reactions such as oxidation, acylation, alkylation, reduction, Fischer-Tropsch synthesis, polymerization, dehydrogenation and hydroformylation. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] The main limitation of the hierarchical porous materials synthesized via the techniques reported to date in the scientific literature is that they are obtained usually in the form of a powder or as a film, making it difficult to separate and therefore to reuse them.…”

Section: Introductionmentioning

confidence: 99%

Hard meso/macroporous iron oxide/iron silicate macrospheres obtained by the multi‐templating technique

Mureşan

Pui

Măluțan

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND The aim of this work was to develop a cheap and easy method for the synthesis of porous iron oxide/iron silicate composite materials in the form of spheres to replace their corresponding counterparts in powder form. Macrospheres with diameters in the range 1.2–1.3 mm were prepared by the spray‐gelling technique using the multi‐templating method. Iron nitrate and tetraethyl orthosilicate were used as iron and silica sources respectively. Chitosan played a dual role (pore‐ and shape‐generating agent), while other inexpensive and easily accessible biomaterials including yeast and gelatin were used as pore generators. By this technique can be obtained metallosilicates or metal oxides/metallosilicates containing high amounts of metal incorporated within the silica framework. RESULTS The iron oxide/iron silicate composite beads were characterized by nitrogen sorption, scanning electron microscopy (SEM), energy‐dispersive X‐ray (EDX), Fourier transform infrared (FTIR), Raman, X‐ray diffraction (XRD), diffuse reflectance (DR) ultraviolet (UV)–visible and X‐ray photoelectron spectroscopy (XPS) analyses. Wide angle XRD indicated the presence of iron oxides on the surface of sample. XPS, FTIR, Raman and UV–visible analyses showed that the samples contained both intra‐framework as well as extra‐framework iron species. SEM images indicated that the macrospheres were endowed with large pores. The iron oxide/iron silicate beads exhibited good catalytic activity in the hydroxylation reaction of phenol with hydrogen peroxide. CONCLUSION This synthesis method allowed the obtaining of spherical shaped particles with large pores which exhibited good mechanical, thermal and chemical stability. Owing to their size, hardness and shape, these materials can be easily handled, recovered and reused. © 2019 Society of Chemical Industry

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Direct synthesis, characterization and catalytic performance of Al–Fe-SBA-15 materials in selective catalytic reduction of NO with NH3

Cited by 16 publications

References 30 publications

Fe-Containing MOFs as Seeds for the Preparation of Highly Active Fe/Al-SBA-15 Catalysts in the N-Alkylation of Aniline

Fe-Containing MOFs as Seeds for the Preparation of Highly Active Fe/Al-SBA-15 Catalysts in the N-Alkylation of Aniline

Synthesis,Mechanisms and Different Applications of Mesoporous Materials Based on Silica and Alumina

Hard meso/macroporous iron oxide/iron silicate macrospheres obtained by the multi‐templating technique

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