fig10

From: Critical advances in charge separation regulation for photocatalytic CO₂ reduction

Critical advances in charge separation regulation for photocatalytic CO<sub>2</sub> reduction

Figure 10. (A) Synthesis of porous Pd-HPP-TiO₂ and the possible mechanism of photocatalytic CO₂ reduction. Reprinted from Ref.^[84] under the CC BY 4.0 license. (B) Correlations between the selectivity for CH₄ and surface site proportion as functions of the size of Pt NPs in xPHTSO (x = 1.8, 3.4, 4.3, and 7.0). (C) UV-Vis DRS spectra and the corresponding samples’ photos (inset). Figure 10B and C is reprinted from Ref.^[160] under the CC BY 4.0 license. HPP: Hyper-crosslinked porphyrin-based polymer; CB: conduction band; VB: valence band; PHTSO: Pt-loaded hollow TiO₂ with a silica overlayer; NP: nanoparticle; UV-Vis: ultraviolet-visible; DRS: diffuse reflectance spectroscopy.