Total oxidation of toluene on Pt/CeO2–ZrO2–Bi2O3/γ-Al2O3 catalysts prepared in the presence of polyvinyl pyrrolidone

Masui, Toshiyuki; Imadzu, Hayato; Matsuyama, Naoto; Imanaka, Nobuhito

doi:10.1016/j.jhazmat.2009.11.108

Cited by 94 publications

(54 citation statements)

References 27 publications

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“…1 Catalyst preparation SBA-16 was prepared according to the hydrothermal method described in previous studies [10,14]. Pluronic F-127 (1.6 g) and 1,3,5-trimethylbenzene (1.1 cm 3 ) were dissolved into 0.2 mol/dm 3 hydrochloric acid (90 cm 3 ), and the mixture was stirred at 35 ℃ for 3 h. After stirring, tetraethyl orthosilicate (7.1 cm 3 ) was added to the solution, and the mixture was stirred again at 35 ℃ for 20 h. Then the mixture was poured into a Teflon bottle in a sealed brass vessel and heated at 140 ℃ for 24 h. The solid product was collected by filtration, washed and dried at room temperature for 12 h. Finally, the dried powder was calcined at 600 ℃ for 4 h in air to obtain SBA- 16 3 ) was added, and the mixture was stirred at room temperature for 6 h. The content of Ce 0.68 Zr 0.17 Bi 0.15 O 1.925 was adjusted to be 16 wt%, which was the optimum amount for toluene oxidation [15]. After stirring, the solvent was vaporized at 180 ℃.…”

Section: Introductionmentioning

confidence: 99%

Catalytic liquid phase oxidation of 1,4-dioxane over a Pt/CeO2-ZrO2-Bi2O3/SBA-16 catalyst

et al. 2015

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Abstract:A Pt/CeO 2 -ZrO 2 -Bi 2 O 3 /SBA-16 (Santa Barbara Amorphous No. 16) catalyst was prepared by hydrothermal and wet impregnation methods for catalytic purification of 1,4-dioxane in water. SBA-16 has a number of mesopores and the average size of the pores is 9.4 nm. In the present catalyst, platinum and CeO 2 -ZrO 2 -Bi 2 O 3 were successfully dispersed in the pores of the SBA-16 support, and the temperature dependence of the liquid phase oxidation of 1,4-dioxane was examined. The oxidation reaction proceeded effectively in the air atmosphere in the temperature range of 40-80 ℃.

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Section: Introductionmentioning

confidence: 99%

Catalytic liquid phase oxidation of 1,4-dioxane over a Pt/CeO2-ZrO2-Bi2O3/SBA-16 catalyst

et al. 2015

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“…A wide variety of metal ions (Fe, Ti, V, Cr, Cu, Mn etc.) has been introduced into the silica matrix to obtain materials with tunable catalytic properties [4][5][6][7][8][9][10][11][12][13][14][15]. The high surface area and pore volume of the mesoporous supports allow high loadings of the active phase, and their large pore size makes the diffusion of the reactants easier, allowing enhanced availability of the catalytically active sites [16].…”

Section: Introductionmentioning

confidence: 99%

Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation

Szegedi

Popova

Lázár

et al. 2013

Microporous and Mesoporous Materials

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Copper and iron modified SBA-15 and SBA-16 materials were prepared by incipient wetness impregnation technique and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 physisorption, temperature-programmed reduction (TPR-TGA), UV-Vis diffuse reflectance and Mössbauer spectroscopy. Formation of finely dispersed copper and ironoxide species was observed on both supports, whereas copper ferrite could be evidenced only on SBA-15. It was found that the structural and surface properties of the mesoporous supports determine the type of formed metal oxides, their dispersion, reducibility and the catalytic activity in total oxidation of toluene. On SBA-16 support penetration of metal salt into the bimodal channel system is hindered therefore separate copper-and iron-oxide phases are formed on the outer surface of catalysts. The catalytic activity and stability are lower due to the easier agglomeration of particles. On SBA-15 support finely dispersed metal-oxides can be found in the mesoporous channels. Their interaction is favored to form bimetallic phases enhancing the catalytic activity and stability in total oxidation of toluene.

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“…After the mixture was stirred at 80 • C for 8 h, the solid was recovered after washing with toluene and then with ethanol intensively to eliminate the physically adsorbed TMCS and toluene. The P123 template was removed with ethanol in a Soxhlet extractor at 100 • C for 24 h and dried in vacuum at 80 • C for 8 h. Finally, the mesoporous silica with the external surface capped with -Si(CH 3 ) 3 (denoted as T-SBA-15) was collected. 1.0 g of T-SBA-15 was dispersed in 75 ml of dry toluene after having been dried at 80 • C for 12 h, and then 3.0 ml of APTMS was added under stirring.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…Among them, benzene, toluene and xylene are of particular concern due to their high toxicity for human beings [1][2][3]. The deep catalytic oxidation of these pollutants to CO 2 and H 2 O has been identified as one of the most efficient ways to eliminate VOCs [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The primary objectives of this paper are as follows: (1) to investigate the flexibility of the grafting approach for the synthesis of highly dispersed Pd nanoparticles confined in mesoporous SBA-15 channels; (2) to examine whether the solvents (ethanol, H 2 O, tetrahydrofuran (THF), dimethyl sulphoxide (DMSO) and N,Ndimethylformamide (DMF)) affect the dispersion of Pd atoms; (3) to explore the application prospect (activity, selectivity and stability) of the synthesized catalysts in the elimination of toluene. To the best of our knowledge, such a systematic study has not been reported.…”

Section: Introductionmentioning

confidence: 99%

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Ligand-assisted preparation of highly active and stable nanometric Pd confined catalysts for deep catalytic oxidation of toluene

Peng

Wang

et al. 2010

Journal of Hazardous Materials

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a b s t r a c tIn this study, mesoporous SBA-15 supported Pd catalysts were synthesized through impregnation and grafting approaches. Moreover, the influences of different solvents (ethanol, H 2 O, tetrahydrofuran, dimethyl sulphoxide and N,N-dimethylformamide) on the dispersion of supported Pd nanoparticles were also systematically investigated. The prepared materials were comprehensively explored by various techniques, including XRD, EDS, ICP-OES, H 2 chemisorption, N 2 adsorption/desorption, TG-DSC, FT-IR, TEM and STEM. It is found that the traditional impregnation method has some disadvantages in obtaining highly dispersed Pd active phase. Whereas, the grafting method could highly disperse Pd nanoparticles within the mesoporous channels of support material, and the grafting procedure should be promising in designing highly dispersed Pd particles on the silica-based mesoporous materials. The catalyst prepared via the grafting procedure possesses much higher activity and selectivity than that prepared by impregnation method for deep catalytic oxidation of toluene.

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Total oxidation of toluene on Pt/CeO2–ZrO2–Bi2O3/γ-Al2O3 catalysts prepared in the presence of polyvinyl pyrrolidone

Cited by 94 publications

References 27 publications

Catalytic liquid phase oxidation of 1,4-dioxane over a Pt/CeO2-ZrO2-Bi2O3/SBA-16 catalyst

Catalytic liquid phase oxidation of 1,4-dioxane over a Pt/CeO2-ZrO2-Bi2O3/SBA-16 catalyst

Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation

Ligand-assisted preparation of highly active and stable nanometric Pd confined catalysts for deep catalytic oxidation of toluene

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