Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity

Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity

Silica supported amorphous molybdenum catalysts had been synthesized in alkali, neutral and acidic medium via sol–gel technique. The catalysts were found to be amorphous and free from bulk MoO3. UV–Vis diffuse reflectance analysis and XPS analysis indicated the co-existence of Mo5+ and Mo6+ species...

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Main Authors: Adam, Farook, Mohamed Iqbal, Mohammad Anwar
Format: Article
Language:English
Published: Elsevier Inc. 2011
Subjects:
QD Chemistry
Online Access:http://irep.iium.edu.my/22279/
http://irep.iium.edu.my/22279/
http://irep.iium.edu.my/22279/
http://irep.iium.edu.my/22279/1/microporous_and_mesoporous_materials_141%282011%29_119-127.pdf
id iium-22279
recordtype eprints
spelling iium-222792012-12-14T06:43:52Z http://irep.iium.edu.my/22279/ Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity Adam, Farook Mohamed Iqbal, Mohammad Anwar QD Chemistry Silica supported amorphous molybdenum catalysts had been synthesized in alkali, neutral and acidic medium via sol–gel technique. The catalysts were found to be amorphous and free from bulk MoO3. UV–Vis diffuse reflectance analysis and XPS analysis indicated the co-existence of Mo5+ and Mo6+ species when the incorporation was done in acidic medium. The catalytic activity was tested in the liquid phase oxidation of styrene by using hydrogen peroxide as oxidant. The catalyst prepared in acidic medium showed better catalytic activity compared to the catalysts prepared in alkali and neutral medium. The co-existence of Mo5+ and Mo6+ species is believed to enhance the catalytic activity. Benzaldehyde was the major product detected. The structure of the catalyst was proposed based on the results obtained from XPS, 29Si MAS NMR, UV–Vis diffuse reflectance and FT-IR spectroscopy. Elsevier Inc. 2011-10-31 Article PeerReviewed application/pdf en http://irep.iium.edu.my/22279/1/microporous_and_mesoporous_materials_141%282011%29_119-127.pdf Adam, Farook and Mohamed Iqbal, Mohammad Anwar (2011) Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity. Microporous And Mesoporous Materials, 141 (1-3). pp. 119-127. ISSN 1387-1811 http://www.sciencedirect.com/science/article/pii/S1387181110003665 10.1016/j.micromeso.2010.10.037
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
topic QD Chemistry
spellingShingle QD Chemistry
Adam, Farook
Mohamed Iqbal, Mohammad Anwar
Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity
description Silica supported amorphous molybdenum catalysts had been synthesized in alkali, neutral and acidic medium via sol–gel technique. The catalysts were found to be amorphous and free from bulk MoO3. UV–Vis diffuse reflectance analysis and XPS analysis indicated the co-existence of Mo5+ and Mo6+ species when the incorporation was done in acidic medium. The catalytic activity was tested in the liquid phase oxidation of styrene by using hydrogen peroxide as oxidant. The catalyst prepared in acidic medium showed better catalytic activity compared to the catalysts prepared in alkali and neutral medium. The co-existence of Mo5+ and Mo6+ species is believed to enhance the catalytic activity. Benzaldehyde was the major product detected. The structure of the catalyst was proposed based on the results obtained from XPS, 29Si MAS NMR, UV–Vis diffuse reflectance and FT-IR spectroscopy.
format Article
author Adam, Farook
Mohamed Iqbal, Mohammad Anwar
author_facet Adam, Farook
Mohamed Iqbal, Mohammad Anwar
author_sort Adam, Farook
title Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity
title_short Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity
title_full Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity
title_fullStr Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity
title_full_unstemmed Silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity
title_sort silica supported amorphous molybdenum catalysts prepared via sol–gel method and its catalytic activity
publisher Elsevier Inc.
publishDate 2011
url http://irep.iium.edu.my/22279/
http://irep.iium.edu.my/22279/
http://irep.iium.edu.my/22279/
http://irep.iium.edu.my/22279/1/microporous_and_mesoporous_materials_141%282011%29_119-127.pdf
first_indexed 2023-09-18T20:34:01Z
last_indexed 2023-09-18T20:34:01Z
_version_ 1777408924505341952

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