Carboxylic acid assisted synthesis of ordered mesoporous silicon-doped γ-alumina with high thermal stability

Zhang, Wen; Zheng, Xiaohai; Zhao, Xiaoliang; Zheng, Ying; Jiang, Lilong

doi:10.1016/j.matlet.2015.07.097

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…In Fig. 2A, the largest steepness of the capillary condensation steps of the Si-OMA-20 indicates a high degree of uniformity [27], which exhibits narrow pore size distribution centered at 6.1 nm. When calcined at 1100 °C, The capillary condensation steps of the samples are slightly shifted to greater relative pressures, indicating an increase in the pore size.…”

Section: Structural and Textural Properties Of Catalyst Supportmentioning

confidence: 98%

Synthesis and application of highly dispersed ordered mesoporous silicon-doped Pd-alumina catalyst with high thermal stability

Zheng

Chen

et al. 2016

Chemical Engineering Journal

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Section: Structural and Textural Properties Of Catalyst Supportmentioning

confidence: 98%

Synthesis and application of highly dispersed ordered mesoporous silicon-doped Pd-alumina catalyst with high thermal stability

Zheng

Chen

et al. 2016

Chemical Engineering Journal

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“…The narrow hysteresis loop implies the regularity of mesoporous alumina [41]. Moreover, the steepness of the adsorption branch of the isotherms indicated an improved uniformity of mesopores [45]. This is attributed to good interaction between the surfactant and boehmite precursor.…”

Section: Nitrogen Adsorption-desorption Analysismentioning

confidence: 91%

The interplay of polyoxyethylene (40) stearate surfactant concentration and aging time on the Mesoporous γ-alumina synthesis and appraisal of its catalytic activity

Bello

Yacob

2021

SN Appl. Sci.

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An economical and environmentally benign synthesis method remains important in industrial processes. In this work, kaolin an abundant and non-toxic precursor is employed for mesoporous gamma-alumina synthesis. The study explored the consequence of varying polyoxyethylene (40) stearate (PS) surfactant concentration and aging time in the synthesis of mesoporous gamma-alumina with enhancing structural properties. The alumina was characterized using X-Ray Powder Diffraction (XRD), Thermogravimetric-Derivative Thermal Gravimetric (TG-DTG), Fourier Transform Infrared (FTIR), N2 Adsorption–Desorption, Field Emission Scanning Electron Microscopy (FESEM), Solid State 27Al MAS NMR, and X-Ray Fluorescence (XRF). Structural properties and morphology of the mesoporous γ-Al2O3 improved with increasing surfactant amount from 0.45 g to 1.8 g and aging time from 1 to 2 days, then dropped afterward. Accordingly, mesoporous γ-Al2O3 synthesized with 1.8 g PS and age for 2 days (Al-1.8-2) possessed the highest surface area of 319.2 m2/g, a narrow average pore diameter of 2.7 nm, and pore volume of 0.42 cm3/g. Thus, Al-1.8-2 was chosen and doped with 15% NaOH to obtained 15-Na/Al-1.8-2 catalyst. After modification, the basic sites increased, the surface area decreased, and the morphology changed, signifying Na incorporation into the alumina. On application in methanolysis reaction, up to 99.46% biodiesel yield was obtained, demonstrating a very high activity for the catalyst. The tremendous activity of the catalyst can be associated with the enhanced structural properties of the mesostructured gamma-alumina.

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Synthesis of ordered mesoporous boron-doped γ-alumina with high surface area and large pore volume

Cai

Zheng

et al. 2016

Materials Letters

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Carboxylic acid assisted synthesis of ordered mesoporous silicon-doped γ-alumina with high thermal stability

Cited by 6 publications

References 16 publications

Synthesis and application of highly dispersed ordered mesoporous silicon-doped Pd-alumina catalyst with high thermal stability

Synthesis and application of highly dispersed ordered mesoporous silicon-doped Pd-alumina catalyst with high thermal stability

The interplay of polyoxyethylene (40) stearate surfactant concentration and aging time on the Mesoporous γ-alumina synthesis and appraisal of its catalytic activity

Synthesis of ordered mesoporous boron-doped γ-alumina with high surface area and large pore volume

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