Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides
A variety of carbon-modified titania powders were prepared by impregnation method using a commercial available titania powder, Hombikat UV100, as matrix material while a range of alcohols from propanol to hexanol were used as precursors of carbon sources. Rising the carbon number of alcoholic precur...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2012/548647 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832547556093067264 |
|---|---|
| author | Chun-Hung Huang Yu-Ming Lin I-Kai Wang Chun-Mei Lu |
| author_facet | Chun-Hung Huang Yu-Ming Lin I-Kai Wang Chun-Mei Lu |
| author_sort | Chun-Hung Huang |
| collection | DOAJ |
| description | A variety of carbon-modified titania powders were prepared by impregnation method using a commercial available titania powder, Hombikat UV100, as matrix material while a range of alcohols from propanol to hexanol were used as precursors of carbon sources. Rising the carbon number of alcoholic precursor molecule, the modified titania showed increasing visible activities of NOx photodegradation. The catalyst modified with cyclohexanol exhibited the best activities of 62%, 62%, 59%, and 54% for the total NOx removal under UV, blue, green, and red light irradiation, respectively. The high activity with long wavelength irradiation suggested a good capability of photocatalysis in full visible light spectrum. Analysis of UV-visible spectrum indicated that carbon modification promoted visible light absorption and red shift in band gap. XPS spectroscopic analysis identified the existence of carbonate species (C=O), which increased with the increasing carbon number of precursor molecule. Photoluminescence spectra demonstrated that the carbonate species suppressed the recombination rate of electron-hole pair. As a result, a mechanism of visible-light-active photocatalyst was proposed according to the formation of carbonate species on carbon-modified TiO2. |
| format | Article |
| id | doaj-art-1f98c6135ce44585b3f37ceba56e5d5f |
| 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-1f98c6135ce44585b3f37ceba56e5d5f2025-02-03T06:44:22ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/548647548647Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen OxidesChun-Hung Huang0Yu-Ming Lin1I-Kai Wang2Chun-Mei Lu3Product Development Division, Daxin Material Co., No. 15, Keyuan 1st Road, Central Taiwan Science Park, Taichung 40763, TaiwanITRI South, Industrial Technology Research Institute, Room 602, Building 3, 31 Gongye 2nd Road, Annan District, Tainan 70955, TaiwanDepartment of Chemical Engineering, National Tsing-Hua University, Hsinchu 30043, TaiwanDepartment of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 41101, TaiwanA variety of carbon-modified titania powders were prepared by impregnation method using a commercial available titania powder, Hombikat UV100, as matrix material while a range of alcohols from propanol to hexanol were used as precursors of carbon sources. Rising the carbon number of alcoholic precursor molecule, the modified titania showed increasing visible activities of NOx photodegradation. The catalyst modified with cyclohexanol exhibited the best activities of 62%, 62%, 59%, and 54% for the total NOx removal under UV, blue, green, and red light irradiation, respectively. The high activity with long wavelength irradiation suggested a good capability of photocatalysis in full visible light spectrum. Analysis of UV-visible spectrum indicated that carbon modification promoted visible light absorption and red shift in band gap. XPS spectroscopic analysis identified the existence of carbonate species (C=O), which increased with the increasing carbon number of precursor molecule. Photoluminescence spectra demonstrated that the carbonate species suppressed the recombination rate of electron-hole pair. As a result, a mechanism of visible-light-active photocatalyst was proposed according to the formation of carbonate species on carbon-modified TiO2.http://dx.doi.org/10.1155/2012/548647 |
| spellingShingle | Chun-Hung Huang Yu-Ming Lin I-Kai Wang Chun-Mei Lu Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides International Journal of Photoenergy |
| title | Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides |
| title_full | Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides |
| title_fullStr | Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides |
| title_full_unstemmed | Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides |
| title_short | Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides |
| title_sort | photocatalytic activity and characterization of carbon modified titania for visible light active photodegradation of nitrogen oxides |
| url | http://dx.doi.org/10.1155/2012/548647 |
| work_keys_str_mv | AT chunhunghuang photocatalyticactivityandcharacterizationofcarbonmodifiedtitaniaforvisiblelightactivephotodegradationofnitrogenoxides AT yuminglin photocatalyticactivityandcharacterizationofcarbonmodifiedtitaniaforvisiblelightactivephotodegradationofnitrogenoxides AT ikaiwang photocatalyticactivityandcharacterizationofcarbonmodifiedtitaniaforvisiblelightactivephotodegradationofnitrogenoxides AT chunmeilu photocatalyticactivityandcharacterizationofcarbonmodifiedtitaniaforvisiblelightactivephotodegradationofnitrogenoxides |