Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous Materials
Titania containing cubic MCM-48 mesoporous materials were synthesized successfully at room temperature by a modified Stöber method. The integrity of the cubic mesoporous phase was retained even at relatively high loadings of titania. The TiO2-MCM-48 materials were extensively characterized by a vari...
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doaj-efb5d84c676f4284920671b48da51bb92020-11-24T22:12:54ZengMDPI AGCatalysts2073-43442015-09-01531603162110.3390/catal5031603catal5031603Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous MaterialsSridhar Budhi0Chia-Ming Wu1Dan Zhao2Ranjit T. Koodali3Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO 80401, USADepartment of Chemistry, University of South Dakota, 414 E. Clark Street, Vermillion, SD 57069, USADepartment of Chemical Engineering, Ningbo University of Technology, Ningbo 315016, ChinaDepartment of Chemistry, University of South Dakota, 414 E. Clark Street, Vermillion, SD 57069, USATitania containing cubic MCM-48 mesoporous materials were synthesized successfully at room temperature by a modified Stöber method. The integrity of the cubic mesoporous phase was retained even at relatively high loadings of titania. The TiO2-MCM-48 materials were extensively characterized by a variety of physico-chemical techniques. The physico-chemical characterization indicate that Ti4+ ions can be substituted in framework tetrahedral positions. The relative amount of Ti4+ ions in tetrahedral position was dependent on the order of addition of the precursor. Even at relatively high loadings of titania, no distinct bulk phase of titania could be observed indicating that the titania nanoclusters are well dispersed on the high surface area mesoporous material and probably exist as amorphous nanoclusters. The TiO2-MCM-48 materials were found to exhibit 100% selectivity in the cyclohexene oxidation at room temperature in the presence of tert-butylhydroperoxide (t-BHP) as the oxidant. The results suggest that room temperature synthesis is an attractive option for the preparation of TiO2-MCM-48 materials with interesting catalytic properties.http://www.mdpi.com/2073-4344/5/3/1603titanium dioxideMCM-48cubic mesoporous materialscyclohexeneepoxidation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sridhar Budhi Chia-Ming Wu Dan Zhao Ranjit T. Koodali |
spellingShingle |
Sridhar Budhi Chia-Ming Wu Dan Zhao Ranjit T. Koodali Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous Materials Catalysts titanium dioxide MCM-48 cubic mesoporous materials cyclohexene epoxidation |
author_facet |
Sridhar Budhi Chia-Ming Wu Dan Zhao Ranjit T. Koodali |
author_sort |
Sridhar Budhi |
title |
Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous Materials |
title_short |
Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous Materials |
title_full |
Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous Materials |
title_fullStr |
Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous Materials |
title_full_unstemmed |
Investigation of Room Temperature Synthesis of Titanium Dioxide Nanoclusters Dispersed on Cubic MCM-48 Mesoporous Materials |
title_sort |
investigation of room temperature synthesis of titanium dioxide nanoclusters dispersed on cubic mcm-48 mesoporous materials |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2015-09-01 |
description |
Titania containing cubic MCM-48 mesoporous materials were synthesized successfully at room temperature by a modified Stöber method. The integrity of the cubic mesoporous phase was retained even at relatively high loadings of titania. The TiO2-MCM-48 materials were extensively characterized by a variety of physico-chemical techniques. The physico-chemical characterization indicate that Ti4+ ions can be substituted in framework tetrahedral positions. The relative amount of Ti4+ ions in tetrahedral position was dependent on the order of addition of the precursor. Even at relatively high loadings of titania, no distinct bulk phase of titania could be observed indicating that the titania nanoclusters are well dispersed on the high surface area mesoporous material and probably exist as amorphous nanoclusters. The TiO2-MCM-48 materials were found to exhibit 100% selectivity in the cyclohexene oxidation at room temperature in the presence of tert-butylhydroperoxide (t-BHP) as the oxidant. The results suggest that room temperature synthesis is an attractive option for the preparation of TiO2-MCM-48 materials with interesting catalytic properties. |
topic |
titanium dioxide MCM-48 cubic mesoporous materials cyclohexene epoxidation |
url |
http://www.mdpi.com/2073-4344/5/3/1603 |
work_keys_str_mv |
AT sridharbudhi investigationofroomtemperaturesynthesisoftitaniumdioxidenanoclustersdispersedoncubicmcm48mesoporousmaterials AT chiamingwu investigationofroomtemperaturesynthesisoftitaniumdioxidenanoclustersdispersedoncubicmcm48mesoporousmaterials AT danzhao investigationofroomtemperaturesynthesisoftitaniumdioxidenanoclustersdispersedoncubicmcm48mesoporousmaterials AT ranjittkoodali investigationofroomtemperaturesynthesisoftitaniumdioxidenanoclustersdispersedoncubicmcm48mesoporousmaterials |
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1725801945002672128 |