研究目的
To investigate the photocatalytic hydrogen evolution activity of a hybrid 1D branched TiO2 loaded with surface plasmonic Au and decorated with g-C3N4 QDs.
研究成果
The composite of branched TiO2, plasmonic Au, and g-C3N4 QDs significantly improves photocatalytic hydrogen evolution under visible light, attributed to the type II heterostructure system and the LSPR effect of Au. The study demonstrates the potential of this composite in clean energy production and other applications.
研究不足
The study does not discuss the scalability of the fabrication process or the long-term stability of the photocatalyst under continuous operation.
1：Experimental Design and Method Selection:
The study involved the fabrication of 1D branched TiO2 by electrospinning followed by an alkali-hydrothermal process, decoration with Au nanoparticles via photo deposition, and grafting of g-C3N4 QDs using a chemical vapor deposition method.
2：Sample Selection and Data Sources:
The samples included TiO2 fibers, HBTiO2, and composites with varying amounts of Au (2 wt%, 4 wt%, 6 wt%, 8 wt%, and 10 wt%).
3：List of Experimental Equipment and Materials:
Equipment included a 300 W xenon lamp, X'pert MPD Pro for XRD, JEOL JSM 6700F for FESEM, JEOL JEM-2100 for TEM, ASAP 2020 for BET analysis, PE lambda 950 spectrometer for UV–vis absorption spectroscopy, Thermo Fisher ESCALAB Xi+ for XPS, TENSOR II infrared spectrometer for FTIR, and FLS980 transient steady-state fluorescence spectrometer for time decay fluorescent spectra. Materials included tetrabutyl titanate (TBT), Polyvinylpyrrolidone (PVP), HAuCl4·3H2O, and melamine.
4：Experimental Procedures and Operational Workflow:
The process involved electrospinning, alkali-hydrothermal treatment, photo deposition of Au, and chemical vapor deposition of g-C3N4 QDs.
5：Data Analysis Methods:
The photocatalytic performance was evaluated by measuring hydrogen evolution under visible light irradiation, and the quantum efficiency was calculated based on the number of evolved hydrogen molecules and incident photons.
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X'pert MPD Pro
PANanalytical Co
X-ray diffraction analysis
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JEOL JSM 6700F
JEOL
Field Emission Scanning Electron Microscopy
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JEOL JEM-2100
JEOL
Transmission Electron Microscopy
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ASAP 2020
Nitrogen adsorption-desorption analysis
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PE lambda 950 spectrometer
UV–vis absorption spectroscopy
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Thermo Fisher ESCALAB Xi+
Thermo Fisher
X-ray Photoelectron spectroscopy
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TENSOR II infrared spectrometer
Bruker
FTIR analysis
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FLS980 transient steady-state fluorescence spectrometer
Time decay fluorescent spectra recording
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