Nb-Ta solid solutions with tunable bandgaps and enhanced dielectric screening for efficient photocatalytic CO2 reduction DOI Open Access

Wenjing Guo,

Yushun Wang, Kai Feng

et al.

Journal of Physics Conference Series, Journal Year: 2025, Volume and Issue: 3013(1), P. 012011 - 012011

Published: May 1, 2025

Abstract The pursuit of efficient photocatalytic CO 2 reduction systems is hindered by the persistent challenge reconciling broad-spectrum absorption with charge carrier management in semiconductor materials. Herein, we demonstrate a dualparameter optimization strategy through rational design niobium-tantalum (Nb-Ta) solid solutions, wherein bandgap engineering and dielectric property modulation are synergistically exploited to overcome performance limitations. A series Ca Nb x Ta 2-x O 7 solutions were synthesized via hydrothermal method, their structural, electronic, properties systematically characterized. UV–Vis DRS spectroscopy revealed tunable (4.34–3.63 eV), transient photocurrent electrochemical impedance demonstrated significantly improved separation efficiency. Under simulated solar irradiation, optimal 0.74 1.26 catalyst achieved 5.3-fold enhancement yield (44.95 μmol g −1 h ) compared pristine , attributed its tailored electronic structure reduced recombination.

Language: Английский

Nb-Ta solid solutions with tunable bandgaps and enhanced dielectric screening for efficient photocatalytic CO2 reduction DOI Open Access

Wenjing Guo,

Yushun Wang, Kai Feng

et al.

Journal of Physics Conference Series, Journal Year: 2025, Volume and Issue: 3013(1), P. 012011 - 012011

Published: May 1, 2025

Abstract The pursuit of efficient photocatalytic CO 2 reduction systems is hindered by the persistent challenge reconciling broad-spectrum absorption with charge carrier management in semiconductor materials. Herein, we demonstrate a dualparameter optimization strategy through rational design niobium-tantalum (Nb-Ta) solid solutions, wherein bandgap engineering and dielectric property modulation are synergistically exploited to overcome performance limitations. A series Ca Nb x Ta 2-x O 7 solutions were synthesized via hydrothermal method, their structural, electronic, properties systematically characterized. UV–Vis DRS spectroscopy revealed tunable (4.34–3.63 eV), transient photocurrent electrochemical impedance demonstrated significantly improved separation efficiency. Under simulated solar irradiation, optimal 0.74 1.26 catalyst achieved 5.3-fold enhancement yield (44.95 μmol g −1 h ) compared pristine , attributed its tailored electronic structure reduced recombination.

Language: Английский

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