Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite
An environmentally friendly visible-light-driven photocatalyst, silver vanadates/SBA-15, was prepared through an incipient wetness impregnation procedure with silver vanadates (SVO) synthesized under a hydrothermal condition without a high-temperature calcination. The addition of mesoporous SBA-15 i...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2012/314361 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832558594263875584 |
|---|---|
| author | Ting-Chung Pan Hung-Chang Chen Guan-Ting Pan Chao-Ming Huang |
| author_facet | Ting-Chung Pan Hung-Chang Chen Guan-Ting Pan Chao-Ming Huang |
| author_sort | Ting-Chung Pan |
| collection | DOAJ |
| description | An environmentally friendly visible-light-driven photocatalyst, silver vanadates/SBA-15, was prepared through an incipient wetness impregnation procedure with silver vanadates (SVO) synthesized under a hydrothermal condition without a high-temperature calcination. The addition of mesoporous SBA-15 improves the formation of nanocrystalline silver vanadates. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms the presence of Brønsted and Lewis acids on the SVO/SBA-15 composites. The results of photoluminescence spectra indicated that the electron-hole recombination rate have been effectively inhibited when SVO was loaded with mesoporous SBA-15. All the composites loaded with various amount of SVO inherit the higher adsorption capacity and larger mineralization yield than those of P-25 (commercial TiO2) and pure SVO. The sample loaded with 51% of SVO (51SVO/SBA-15) with mixed phases of Ag4V2O7 and α-Ag3VO4 exhibits the best photocatalytic activity. A favorable crystalline phase combined with high intensities of Brønsted and Lewis acids is considered the main cause of the enhanced adsorption capacity and outstanding photoactivity of the SVO/SBA-15 composites. |
| format | Article |
| id | doaj-art-6752884dd02c497a9853ac71e8ef0f22 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-6752884dd02c497a9853ac71e8ef0f222025-02-03T01:32:04ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/314361314361Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 CompositeTing-Chung Pan0Hung-Chang Chen1Guan-Ting Pan2Chao-Ming Huang3Department of Environmental Engineering, Kun Shan University, Tainan 71003, TaiwanDepartment of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, TaiwanDepartment of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, TaiwanDepartment of Materials Engineering, Kun Shan University, No. 949 Da-Wan Road, Yong-Kang District, Tainan 71003, TaiwanAn environmentally friendly visible-light-driven photocatalyst, silver vanadates/SBA-15, was prepared through an incipient wetness impregnation procedure with silver vanadates (SVO) synthesized under a hydrothermal condition without a high-temperature calcination. The addition of mesoporous SBA-15 improves the formation of nanocrystalline silver vanadates. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms the presence of Brønsted and Lewis acids on the SVO/SBA-15 composites. The results of photoluminescence spectra indicated that the electron-hole recombination rate have been effectively inhibited when SVO was loaded with mesoporous SBA-15. All the composites loaded with various amount of SVO inherit the higher adsorption capacity and larger mineralization yield than those of P-25 (commercial TiO2) and pure SVO. The sample loaded with 51% of SVO (51SVO/SBA-15) with mixed phases of Ag4V2O7 and α-Ag3VO4 exhibits the best photocatalytic activity. A favorable crystalline phase combined with high intensities of Brønsted and Lewis acids is considered the main cause of the enhanced adsorption capacity and outstanding photoactivity of the SVO/SBA-15 composites.http://dx.doi.org/10.1155/2012/314361 |
| spellingShingle | Ting-Chung Pan Hung-Chang Chen Guan-Ting Pan Chao-Ming Huang Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite International Journal of Photoenergy |
| title | Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite |
| title_full | Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite |
| title_fullStr | Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite |
| title_full_unstemmed | Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite |
| title_short | Photocatalytic Oxidation of Gaseous Isopropanol Using Visible-Light Active Silver Vanadates/SBA-15 Composite |
| title_sort | photocatalytic oxidation of gaseous isopropanol using visible light active silver vanadates sba 15 composite |
| url | http://dx.doi.org/10.1155/2012/314361 |
| work_keys_str_mv | AT tingchungpan photocatalyticoxidationofgaseousisopropanolusingvisiblelightactivesilvervanadatessba15composite AT hungchangchen photocatalyticoxidationofgaseousisopropanolusingvisiblelightactivesilvervanadatessba15composite AT guantingpan photocatalyticoxidationofgaseousisopropanolusingvisiblelightactivesilvervanadatessba15composite AT chaominghuang photocatalyticoxidationofgaseousisopropanolusingvisiblelightactivesilvervanadatessba15composite |