Abstract
AbstractGraphitic carbon nitride (g‐C3N4) is a prominent polymer photocatalyst, yet it suffers from severe charge carrier recombination in photocatalysis. Herein, carbon nanotubes (CNTs) are in situ grown onto g‐C3N4 nanosheets via a chemical vapor deposition (CVD) process, catalyzed by Au nanoparticles (NPs) pre‐deposited on g‐C3N4 surface via deposition‐precipitation. Systematic characterizations, in particular femtosecond transient absorption spectroscopy (fs‐TAS) and time‐resolved photoluminescence (TR‐PL), prove that CNTs can efficiently extract the localized electrons in the tri‐s‐triazine units of g‐C3N4, thereby enhancing charge carrier diffusion and separation. As a result, CNT/Au/g‐C3N4 nanocomposites display a H2 evolution rate of 0.95 mmol g−1 h−1, which is about three times higher than that of Au/g‐C3N4. This work may pave a path to explore the full potential of CNTs to modify g‐C3N4 or other photocatalysts in solar‐to‐chemical energy conversion.
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