Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant
SiO2, ZSM-5 and MCM-22 supported ZnO catalysts were prepared. Elemental analysis and Zn element mapping were conducted to evaluate the dispersion of ZnO on the supports. The prepared materials were tested in adsorption, photochemical oxidation, and photocatalyticdegradation of phenol in aqueous so...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier BV
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/22773 |
| _version_ | 1848750964723417088 |
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| author | Sun, Hongqi Feng, Xiaohui Wang, Shaobin Ang, Ha Ming Tade, Moses |
| author_facet | Sun, Hongqi Feng, Xiaohui Wang, Shaobin Ang, Ha Ming Tade, Moses |
| author_sort | Sun, Hongqi |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | SiO2, ZSM-5 and MCM-22 supported ZnO catalysts were prepared. Elemental analysis and Zn element mapping were conducted to evaluate the dispersion of ZnO on the supports. The prepared materials were tested in adsorption, photochemical oxidation, and photocatalyticdegradation of phenol in aqueous solution. Peroxydisulphate (PDS) and peroxymonosulphate (PMS) were used as oxidants to provide sulphate radicals for chemical oxidation. It was found that adsorptive property of the supports played an important role in photochemical and photocatalytic oxidation. MCM-22 was found to exhibit stronger adsorption, giving 68% of phenol removal in 25 ppm solution, compared to 0%, 3%, and 4% removal on ZnO, SiO2, and ZSM-5, respectively. The PDS and PMS oxidants could be activated by low intensity UV at wavelength greater than 380 nm. However, under low UV intensity, SiO2 and ZSM-5 supported ZnO did not exhibit synergistic effect for phenoldegradation. The phenol removal efficiencies in PDS/UV, ZnO/PDS, ZnO/UV, ZnO(10%)/MCM-22/UV/PDS, and ZnO(10%)/MCM-22/UV/PMS at 90 min and 60 μW/cm2 were 34.2, 13.8, 14.2, 79.0, and 72.1%, respectively. The apparent reaction rate constants of PDS/UV, ZnO/PDS, ZnO/UV, ZnO(10%)/MCM-22/UV/PDS, and ZnO(10%)/MCM-22/UV/PMS were 0.00473, 0.00154, 0.00262, 0.00831, and 0.00365 min−1, respectively. |
| first_indexed | 2025-11-14T07:45:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-22773 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:45:12Z |
| publishDate | 2011 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-227732017-09-13T16:07:47Z Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant Sun, Hongqi Feng, Xiaohui Wang, Shaobin Ang, Ha Ming Tade, Moses SiO2, ZSM-5 and MCM-22 supported ZnO catalysts were prepared. Elemental analysis and Zn element mapping were conducted to evaluate the dispersion of ZnO on the supports. The prepared materials were tested in adsorption, photochemical oxidation, and photocatalyticdegradation of phenol in aqueous solution. Peroxydisulphate (PDS) and peroxymonosulphate (PMS) were used as oxidants to provide sulphate radicals for chemical oxidation. It was found that adsorptive property of the supports played an important role in photochemical and photocatalytic oxidation. MCM-22 was found to exhibit stronger adsorption, giving 68% of phenol removal in 25 ppm solution, compared to 0%, 3%, and 4% removal on ZnO, SiO2, and ZSM-5, respectively. The PDS and PMS oxidants could be activated by low intensity UV at wavelength greater than 380 nm. However, under low UV intensity, SiO2 and ZSM-5 supported ZnO did not exhibit synergistic effect for phenoldegradation. The phenol removal efficiencies in PDS/UV, ZnO/PDS, ZnO/UV, ZnO(10%)/MCM-22/UV/PDS, and ZnO(10%)/MCM-22/UV/PMS at 90 min and 60 μW/cm2 were 34.2, 13.8, 14.2, 79.0, and 72.1%, respectively. The apparent reaction rate constants of PDS/UV, ZnO/PDS, ZnO/UV, ZnO(10%)/MCM-22/UV/PDS, and ZnO(10%)/MCM-22/UV/PMS were 0.00473, 0.00154, 0.00262, 0.00831, and 0.00365 min−1, respectively. 2011 Journal Article http://hdl.handle.net/20.500.11937/22773 10.1016/j.cej.2011.03.059, Elsevier BV restricted |
| spellingShingle | Sun, Hongqi Feng, Xiaohui Wang, Shaobin Ang, Ha Ming Tade, Moses Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant |
| title | Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant |
| title_full | Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant |
| title_fullStr | Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant |
| title_full_unstemmed | Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant |
| title_short | Combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: Effects of support and sulphate oxidant |
| title_sort | combination of adsorption, photochemical and photocatalytic degradation of phenol solution over supported zinc oxide: effects of support and sulphate oxidant |
| url | http://hdl.handle.net/20.500.11937/22773 |