Delocalized Electrons via In Situ CNT Growth on Au/g‐C3N4 for Boosting Photocatalytic H2 Evolution
Source abstract
Abstract
Abstract Graphitic 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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · ZnO doping and properties · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Chemistry and Materials Engineering Wenzhou University Wenzhou 325035 P. R. China
CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 P. R. China
School of Environmental Science and Engineering Qingdao University Qingdao 266071 P. R. China
Funding
National Natural Science Foundation of China
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