Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color Contaminants
This paper presents the effect of fumed silica modification and calcination temperature on the physicochemical properties of photocatalysts and their activity under the UV-VIS and VIS light range. The materials were obtained by hydrolysis of titanium tetraisopropoxide (TTIP) combined with a calcinat...
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MDPI AG
2023-01-01
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| author | Aleksandra Babyszko Agnieszka Wanag Ewelina Kusiak-Nejman Antoni Waldemar Morawski |
| author_facet | Aleksandra Babyszko Agnieszka Wanag Ewelina Kusiak-Nejman Antoni Waldemar Morawski |
| author_sort | Aleksandra Babyszko |
| collection | DOAJ |
| description | This paper presents the effect of fumed silica modification and calcination temperature on the physicochemical properties of photocatalysts and their activity under the UV-VIS and VIS light range. The materials were obtained by hydrolysis of titanium tetraisopropoxide (TTIP) combined with a calcination step. The obtained nanomaterials were characterized using analytical methods such as X-ray diffraction XRD, FT-IR/DRS infrared spectroscopy, UV-Vis/DRS spectroscopy and SEM scanning electron microscopy. BET specific surface area and zeta potential were also measured. It was observed that SiO<sub>2</sub> modification inhibited the transformation phase of anatase to rutile and the increase in crystallite size during calcination. The calcination process contributed to a change in the surface character of photocatalysts under study from positively to negatively charged. The photocatalytic activity of samples was identified by determining the methylene blue decomposition under UV-VIS and VIS light. Experimental results showed that the addition of SiO<sub>2</sub> and the calcination process increased the photoactivity. The obtained materials showed higher activity compared to the reference samples. It was found that the degree of dye removal increased along with increased calcination temperature. The highest activity was observed for photocatalyst SiO<sub>2</sub>(11.1%)/TiO<sub>2</sub>_600. |
| first_indexed | 2024-03-09T13:13:51Z |
| format | Article |
| id | doaj.art-573dfdffac3c488b99e3762b6c0ed68a |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T13:13:51Z |
| publishDate | 2023-01-01 |
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| spelling | doaj.art-573dfdffac3c488b99e3762b6c0ed68a2023-11-30T21:38:33ZengMDPI AGCatalysts2073-43442023-01-0113118610.3390/catal13010186Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color ContaminantsAleksandra Babyszko0Agnieszka Wanag1Ewelina Kusiak-Nejman2Antoni Waldemar Morawski3Faculty of Chemical Technology and Engineering, Department of Inorganic Chemical Technology and Environment Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandFaculty of Chemical Technology and Engineering, Department of Inorganic Chemical Technology and Environment Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandFaculty of Chemical Technology and Engineering, Department of Inorganic Chemical Technology and Environment Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandFaculty of Chemical Technology and Engineering, Department of Inorganic Chemical Technology and Environment Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, PolandThis paper presents the effect of fumed silica modification and calcination temperature on the physicochemical properties of photocatalysts and their activity under the UV-VIS and VIS light range. The materials were obtained by hydrolysis of titanium tetraisopropoxide (TTIP) combined with a calcination step. The obtained nanomaterials were characterized using analytical methods such as X-ray diffraction XRD, FT-IR/DRS infrared spectroscopy, UV-Vis/DRS spectroscopy and SEM scanning electron microscopy. BET specific surface area and zeta potential were also measured. It was observed that SiO<sub>2</sub> modification inhibited the transformation phase of anatase to rutile and the increase in crystallite size during calcination. The calcination process contributed to a change in the surface character of photocatalysts under study from positively to negatively charged. The photocatalytic activity of samples was identified by determining the methylene blue decomposition under UV-VIS and VIS light. Experimental results showed that the addition of SiO<sub>2</sub> and the calcination process increased the photoactivity. The obtained materials showed higher activity compared to the reference samples. It was found that the degree of dye removal increased along with increased calcination temperature. The highest activity was observed for photocatalyst SiO<sub>2</sub>(11.1%)/TiO<sub>2</sub>_600.https://www.mdpi.com/2073-4344/13/1/186photocatalysisTiO<sub>2</sub>fumed silicasol-gel methodcalcinationUV-VIS |
| spellingShingle | Aleksandra Babyszko Agnieszka Wanag Ewelina Kusiak-Nejman Antoni Waldemar Morawski Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color Contaminants Catalysts photocatalysis TiO<sub>2</sub> fumed silica sol-gel method calcination UV-VIS |
| title | Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color Contaminants |
| title_full | Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color Contaminants |
| title_fullStr | Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color Contaminants |
| title_full_unstemmed | Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color Contaminants |
| title_short | Effect of Calcination Temperature of SiO<sub>2</sub>/TiO<sub>2</sub> Photocatalysts on UV-VIS and VIS Removal Efficiency of Color Contaminants |
| title_sort | effect of calcination temperature of sio sub 2 sub tio sub 2 sub photocatalysts on uv vis and vis removal efficiency of color contaminants |
| topic | photocatalysis TiO<sub>2</sub> fumed silica sol-gel method calcination UV-VIS |
| url | https://www.mdpi.com/2073-4344/13/1/186 |
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