Abstract
Noble metal nanoparticles (NMNPs) modified semiconductors play important roles in heterogeneous catalysis. However, for the ultra-small NMNPs (<5 nm) on TiO2, the problems of easy agglomeration and quick deactivation highlight the need for highly efficient protection of ultra-small NMNPs. Here, we introduce a novel structure of carbonized liquid crystals (CLCs) protected Pt NPs on TiO2, which involves in-situ photo-reduction of chloroplatinic acid to ultra-small Pt NPs in lamellar liquid crystals. According to the results of morphological structures, CLCs changed the contact type of Pt/TiO2 from ‘face-contact’ to ‘point-contact’, which was consistent with our simulation results. Compared with the bare Pt/TiO2, the visible-light photocatalytic H2 production rate of C–Pt/TiO2 exhibited 1.75-fold enhancement under the protection of CLCs (26.73 mmol g−1 h−1vs. 15.26 mmol g−1 h−1). Especially, the marriage of CLCs and the traditional Pt/TiO2 photocatalyst achieved long-term stability, which remained 87% of the original rate at the sixth cycle.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
