Alkali modified P25 with enhanced CO2 adsorption for CO2 photoreduction

Jeannie Z. Y. Tan; Stelios Gavrielides; Hao R. Xu; Warren A. Thompson; M. Mercedes Maroto-Valer

doi:10.1039/d0ra05010e

Alkali modified P25 with enhanced CO₂adsorption for CO₂photoreduction

Jeannie Z. Y. Tan^*, Stelios Gavrielides, Hao R. Xu, Warren A. Thompson, M. Mercedes Maroto-Valer

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

To improve the CO₂ adsorption on the photocatalyst, which is an essential step for CO₂ photoreduction, solid solutions were fabricated using a facile calcination treatment at 900°C. Using various alkalis, namely NaOH, Na₂CO₃, KOH, K₂CO₃, the resulted samples presented a much higher CO₂ adsorption capacity, which was measured with the pulse injection of CO₂ on the temperature programmed desorption workstation, compared to the pristine Evonik P25. As a result, all of the fabricated solid solutions produced higer yield of CO under UV light irradiation due to the increased basicity of the solid solutions even though they possessed only the rutile polymorph of TiO₂. The highest CO₂ adsorption capacity under UV irradiation was observed in the sample treated with NaOH, which contained the highest amount of isolated hydroxyls, as shown in the FTIR studies.

Original language	English
Pages (from-to)	27989-27994
Number of pages	6
Journal	RSC Advances
Volume	10
Issue number	47
Early online date	27 Jul 2020
DOIs	https://doi.org/10.1039/d0ra05010e
Publication status	Published - 2020

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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title = "Alkali modified P25 with enhanced CO2 adsorption for CO2 photoreduction",

abstract = "To improve the CO2 adsorption on the photocatalyst, which is an essential step for CO2 photoreduction, solid solutions were fabricated using a facile calcination treatment at 900°C. Using various alkalis, namely NaOH, Na2CO3, KOH, K2CO3, the resulted samples presented a much higher CO2 adsorption capacity, which was measured with the pulse injection of CO2 on the temperature programmed desorption workstation, compared to the pristine Evonik P25. As a result, all of the fabricated solid solutions produced higer yield of CO under UV light irradiation due to the increased basicity of the solid solutions even though they possessed only the rutile polymorph of TiO2. The highest CO2 adsorption capacity under UV irradiation was observed in the sample treated with NaOH, which contained the highest amount of isolated hydroxyls, as shown in the FTIR studies.",

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T1 - Alkali modified P25 with enhanced CO2 adsorption for CO2 photoreduction

AU - Tan, Jeannie Z. Y.

AU - Gavrielides, Stelios

AU - Xu, Hao R.

AU - Thompson, Warren A.

AU - Maroto-Valer, M. Mercedes

PY - 2020

Y1 - 2020

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AB - To improve the CO2 adsorption on the photocatalyst, which is an essential step for CO2 photoreduction, solid solutions were fabricated using a facile calcination treatment at 900°C. Using various alkalis, namely NaOH, Na2CO3, KOH, K2CO3, the resulted samples presented a much higher CO2 adsorption capacity, which was measured with the pulse injection of CO2 on the temperature programmed desorption workstation, compared to the pristine Evonik P25. As a result, all of the fabricated solid solutions produced higer yield of CO under UV light irradiation due to the increased basicity of the solid solutions even though they possessed only the rutile polymorph of TiO2. The highest CO2 adsorption capacity under UV irradiation was observed in the sample treated with NaOH, which contained the highest amount of isolated hydroxyls, as shown in the FTIR studies.

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Alkali modified P25 with enhanced CO₂adsorption for CO₂photoreduction

Abstract

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