Lattice energy transfer from homo-crystalline substitution for enhanced piezo-photocatalytic CO2 conversion
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 157345 |
Journal / Publication | Chemical Engineering Journal |
Volume | 501 |
Online published | 2 Nov 2024 |
Publication status | Published - 1 Dec 2024 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85208763963&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(ddbf6e35-0121-4a46-9252-0b609f1ba608).html |
Abstract
The rapid recombination of carriers and large activation energy of CO2 compromise the efficiency of CO2 photoreduction. Herein, SrTiO3 (STO) with different molar ratios of La3+ and Al3+ double-site homo-crystalline substitution is prepared by a ball-milling molten salt method. The concentration of Ti3+ and excess oxygen vacancies decrease to improve the catalytic activity. Meanwhile, the double sites act as electron transfer platforms for easy electron transfer from the bulk phase to the surface to foster CO2 photoreduction. Not only that, the energy transfer due to doping-induced lattice distortion can potentially enhance the photocatalytic activity. A piezoelectrically polarized electric field is introduced to further expedite charge transport. As a result, the activity of La, Al-STO piezo-photocatalytic CO2 reduction is improved to 39.17 µmol g−1 h−1, which is more than seven times better than that of the pure STO. Furthermore, CO2 adsorbs spontaneously on the catalysts because the thermodynamic energy barrier decreases due to the piezoelectric force, which is verified by density-functional theory calculation. This study reveals the great potential of double-site homo-crystalline substitution of STO pertaining to the charge transport kinetics and thermodynamics of the catalytic reaction in the piezo-photocatalytic CO2 process. © 2024 The Authors.
Research Area(s)
- CO2 reduction, Homo-crystalline substitution, Internal electric field, Piezo-photocatalysis
Citation Format(s)
Lattice energy transfer from homo-crystalline substitution for enhanced piezo-photocatalytic CO2 conversion. / Bi, Chuanzhou; Xu, Hangmin; Zhou, Ganghua et al.
In: Chemical Engineering Journal, Vol. 501, 157345, 01.12.2024.
In: Chemical Engineering Journal, Vol. 501, 157345, 01.12.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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