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Abstract Titania‐based materials have aroused great attention in energy conversion and photocatalytic degradation, but they suffer from the drawbacks of fast electron–hole recombination and narrow light‐adsorption range. Here, a series of heterojunction mesoporous TiO 2 /g‐C 3 N 4 (mTiO 2 /g‐C 3 N 4 ) composites with improved light‐adsorption capacity and efficient light‐capturing property are designed through a novel solid–liquid interface induced co‐assembly strategy and controlling the interface property of g‐C 3 N 4 . Through introducing Pt precursor during the synthesis, ultrasmall Pt nanoparticles are in situ generated in the mTiO 2 /g‐C 3 N 4 composites, forming mesoporous Pt@TiO 2 /g‐C 3 N 4 (mPt @ TiO 2 /g‐C 3 N 4 ‐4.0) with abundant surface active sites, and huge heterojunction interfaces. The obtained mPt @ TiO 2 /g‐C 3 N 4 ‐4.0 photocatalysts have narrow band gap (≈2.96 eV) and superior performance in promoting separation of photogenerated charge carriers. They show ultrahigh photocurrent density (≈8.3 µA cm −2 ) that is five times higher than that of mTiO 2 /g‐C 3 N 4 ‐4.0 (≈1.6 µA cm −2 ) due to the effective charge separation between the semiconductors and Pt nanoparticles, as well as the synergistic effect at heterojunction interfaces. In addition, mPt @ TiO 2 /g‐C 3 N 4 photocatalysts show excellent performance in photodegradation of rhodamine B with fast decomposition rate within 8 min. These results foresee the wide‐range applications of the composite photocatalysts potential candidates for solar‐to‐fuel conversion and environmental remediation.
Zou et al. (Tue,) studied this question.
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