In situ Irradiated XPS Investigation on S‐Scheme TiO2@ZnIn2S4 Photocatalyst for Efficient Photocatalytic CO2 Reduction

Abstract Reasonable design of efficient hierarchical photocatalysts has gained significant attention. Meanwhile, S‐scheme photogenerated charge transfer mechanism is testified by in situ irradiated X‐ray photoelectron spectroscopy, work function calculation, and electron paramagnetic resonance measurements.

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• 1 Herein, a step‐scheme (S‐scheme) core‐shell TiO 2 @ZnIn 2 S 4 heterojunction is designed for photocatalytic CO 2 reduction.
• 2 The optimized sample exhibits much higher CO 2 photoreduction conversion rates (the sum yield of CO, CH 3 OH, and CH 4 ) than the blank control, i.e., ZnIn 2 S 4 and TiO 2 .
• 3 The improved photocatalytic performance can be attributed to the inhibited recombination of photogenerated charge carriers induced by S‐scheme heterojunction.

This work deepens our understanding of the fundamental laws governing the universe, from subatomic particles to cosmic structures.

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