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Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol

In this work, titania-supported fibrous silica (TiO2-KCC1) and Fibrous Silica-Titania (FST) were prepared via microemulsion technique with a different sequence of titania incorporation method. The catalysts were characterized by x-ray diffraction (XRD), N-2 adsorption-desorption, field emission scan...

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Main Authors: Khusnun, N. F., Jalil, A. A., Abdullah, T. A. T., Latip, S. S. M., Hitam, C. N. C., Fauzi, A. A., Hassan, N. S., Aziz, M. A. H., Rahman, A. F. A., Aziz, F. F. A., Bahari, M., Adnan, R. H., Saravanan, R.
Format: Article
Language:English
Published: Elsevier Ltd. 2022
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TP Chemical technology
Online Access:http://eprints.utm.my/103040/1/NFKhusnun2022_InfluenceofTiO2DispersiononSilicaSupport.pdf
http://eprints.utm.my/103040/
http://dx.doi.org/10.1016/j.jcou.2022.101901
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spelling my.utm.1030402023-10-12T09:06:47Z http://eprints.utm.my/103040/ Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol Khusnun, N. F. Jalil, A. A. Abdullah, T. A. T. Latip, S. S. M. Hitam, C. N. C. Fauzi, A. A. Hassan, N. S. Aziz, M. A. H. Rahman, A. F. A. Aziz, F. F. A. Bahari, M. Adnan, R. H. Saravanan, R. TP Chemical technology In this work, titania-supported fibrous silica (TiO2-KCC1) and Fibrous Silica-Titania (FST) were prepared via microemulsion technique with a different sequence of titania incorporation method. The catalysts were characterized by x-ray diffraction (XRD), N-2 adsorption-desorption, field emission scanning electron microscopy (FESEM), transmission electron microscopes (TEM), and fourier-transform infrared spectroscopy (FTIR). The results discovered that the FST catalyst had high crystallinity, higher specific surface area, and large pore volume. The alternate arrangement of TiO2 and silica in the framework of fibrous silica on FST catalyst had an excellent dispersion and it triggered stronger TiO2-SiO2 interactions. It was observed that in the absence of triethylamine (TEA), formic acid (HCOOH) was much favourable produced by both catalysts, with the highest HCOOH product was obtained using TiO2/KCC-1 (2933 mu mol/g(cat).h). In the presence of TEA as a sacrificial agent, superior methanol production was perceived using FST (3487 mu mol/g(cat).h) as compared to TiO2/KCC-1 (2773 mu mol/g(cat).h). It was proposed that the unique structure of the FST catalyst absorbed many photons and was able to absorb more carbon dioxide (CO2) molecules onto the active site of the catalyst to produce carbonic acid (H2CO3) active radicals. With the assist of TEA, methanol production drastically boosts up almost three times higher than the absence of TEA, probably due to an excess of electrons leading to the formation of more active radicals, thus enhancing the methanol production. The response surface methodology (RSM) result indicated that the utmost yield could be obtained at catalyst dosage 0.619 g/L, TEA volume 157.24 mu L, and CO2 flow rate 9.47 mL/min. The experimental validation of the predicted optimum condition revealed that the methanol yield is 3062.966 mol g(-1) h(-1), compared to the predicted value of 3026.95 mol g(-1) h(-1), with only a 1.18% difference. Elsevier Ltd. 2022 Article PeerReviewed application/pdf en http://eprints.utm.my/103040/1/NFKhusnun2022_InfluenceofTiO2DispersiononSilicaSupport.pdf Khusnun, N. F. and Jalil, A. A. and Abdullah, T. A. T. and Latip, S. S. M. and Hitam, C. N. C. and Fauzi, A. A. and Hassan, N. S. and Aziz, M. A. H. and Rahman, A. F. A. and Aziz, F. F. A. and Bahari, M. and Adnan, R. H. and Saravanan, R. (2022) Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol. Journal of CO2 Utilization, 58 (101901). pp. 1-10. ISSN 2212-9820 http://dx.doi.org/10.1016/j.jcou.2022.101901 DOI: 10.1016/j.jcou.2022.101901
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Khusnun, N. F.
Jalil, A. A.
Abdullah, T. A. T.
Latip, S. S. M.
Hitam, C. N. C.
Fauzi, A. A.
Hassan, N. S.
Aziz, M. A. H.
Rahman, A. F. A.
Aziz, F. F. A.
Bahari, M.
Adnan, R. H.
Saravanan, R.
Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol
description In this work, titania-supported fibrous silica (TiO2-KCC1) and Fibrous Silica-Titania (FST) were prepared via microemulsion technique with a different sequence of titania incorporation method. The catalysts were characterized by x-ray diffraction (XRD), N-2 adsorption-desorption, field emission scanning electron microscopy (FESEM), transmission electron microscopes (TEM), and fourier-transform infrared spectroscopy (FTIR). The results discovered that the FST catalyst had high crystallinity, higher specific surface area, and large pore volume. The alternate arrangement of TiO2 and silica in the framework of fibrous silica on FST catalyst had an excellent dispersion and it triggered stronger TiO2-SiO2 interactions. It was observed that in the absence of triethylamine (TEA), formic acid (HCOOH) was much favourable produced by both catalysts, with the highest HCOOH product was obtained using TiO2/KCC-1 (2933 mu mol/g(cat).h). In the presence of TEA as a sacrificial agent, superior methanol production was perceived using FST (3487 mu mol/g(cat).h) as compared to TiO2/KCC-1 (2773 mu mol/g(cat).h). It was proposed that the unique structure of the FST catalyst absorbed many photons and was able to absorb more carbon dioxide (CO2) molecules onto the active site of the catalyst to produce carbonic acid (H2CO3) active radicals. With the assist of TEA, methanol production drastically boosts up almost three times higher than the absence of TEA, probably due to an excess of electrons leading to the formation of more active radicals, thus enhancing the methanol production. The response surface methodology (RSM) result indicated that the utmost yield could be obtained at catalyst dosage 0.619 g/L, TEA volume 157.24 mu L, and CO2 flow rate 9.47 mL/min. The experimental validation of the predicted optimum condition revealed that the methanol yield is 3062.966 mol g(-1) h(-1), compared to the predicted value of 3026.95 mol g(-1) h(-1), with only a 1.18% difference.
format Article
author Khusnun, N. F.
Jalil, A. A.
Abdullah, T. A. T.
Latip, S. S. M.
Hitam, C. N. C.
Fauzi, A. A.
Hassan, N. S.
Aziz, M. A. H.
Rahman, A. F. A.
Aziz, F. F. A.
Bahari, M.
Adnan, R. H.
Saravanan, R.
author_facet Khusnun, N. F.
Jalil, A. A.
Abdullah, T. A. T.
Latip, S. S. M.
Hitam, C. N. C.
Fauzi, A. A.
Hassan, N. S.
Aziz, M. A. H.
Rahman, A. F. A.
Aziz, F. F. A.
Bahari, M.
Adnan, R. H.
Saravanan, R.
author_sort Khusnun, N. F.
title Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol
title_short Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol
title_full Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol
title_fullStr Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol
title_full_unstemmed Influence of TiO2 dispersion on silica support toward enhanced amine assisted CO2 photoconversion to methanol
title_sort influence of tio2 dispersion on silica support toward enhanced amine assisted co2 photoconversion to methanol
publisher Elsevier Ltd.
publishDate 2022
url http://eprints.utm.my/103040/1/NFKhusnun2022_InfluenceofTiO2DispersiononSilicaSupport.pdf
http://eprints.utm.my/103040/
http://dx.doi.org/10.1016/j.jcou.2022.101901
_version_ 1781777635967238144
score 13.211869

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