研究目的
Investigating the enhancement of photocatalytic activity on hydrogen evolution by modifying TiO2 nanoparticles with 2D MoSe2.
研究成果
The MoSe2/TiO2 nanocomposites exhibited improved absorption abilities for visible light, lower recombination of photo-generated electron-hole pairs, and better photocatalytic activities than pristine TiO2. The average H2 evolution rate of the optimal sample was about 5.13 mmol h?1, which is about 2 times higher than that of pure TiO2. The impressive photocatalytic performance could be attributed to the enhanced light absorption ability and the formation of heterojunction after addition of MoSe2 nanosheets.
研究不足
The study focuses on the enhancement of photocatalytic activity through the modification of TiO2 with MoSe2, but does not explore the scalability of the synthesis method or the long-term stability of the nanocomposites under operational conditions.
1：Experimental Design and Method Selection
MoSe2/TiO2 nanocomposites were synthesized through a simple hydrothermal method using P25 and MoSe2 nanosheets as the precursors.
2：Sample Selection and Data Sources
MoSe2 nanosheets were prepared by a liquid-phase exfoliation method. TiO2 nanoparticles were used as the base material.
3：List of Experimental Equipment and Materials
Scanning electron microscope (Philips, XL30FEG), transmission electron microscope (TECNAI, G2F20), X-ray diffractometer (Bruker, D/8), X-ray photoelectron spectrometer (PHI, RBD updated), Raman spectrometer (HORIBA Jobin Yvon, XploRA), UV-vis spectrophotometer (Shimadzu, UV 3600), fluorescence spectrophotometer (A30, PTI), UV-2300 spectrophotometer, PARSTAT 4000 Potentionstat/Galvanostat EIS analyser.
4：Experimental Procedures and Operational Workflow
MoSe2 nanosheets were prepared and combined with TiO2 nanoparticles via hydrothermal method. The nanocomposites were characterized and their photocatalytic activity was evaluated by water splitting for hydrogen evolution.
5：Data Analysis Methods
The crystal structure was analyzed using XRD, morphology and microstructure were characterized using SEM and TEM, chemical composition was investigated by XPS, and photocatalytic performance was evaluated by measuring hydrogen evolution.
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X-ray diffractometer
D/8
Bruker
Analysis of crystal structure
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Raman spectrometer
XploRA
HORIBA Jobin Yvon
Recording Raman spectrum
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UV-vis spectrophotometer
UV 3600
Shimadzu
Obtaining UV-vis diffused reflectance spectra
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Scanning electron microscope
XL30FEG
Philips
Characterization of morphology and microstructure
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Transmission electron microscope
G2F20
TECNAI
Characterization of morphology and microstructure
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X-ray photoelectron spectrometer
RBD updated
PHI
Chemical composition analysis
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Fluorescence spectrophotometer
A30
PTI
Measuring photoluminescence spectra
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UV-2300 spectrophotometer
UV-2300
Recording UV-Vis absorption spectrum
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PARSTAT 4000 Potentionstat/Galvanostat EIS analyser
PARSTAT 4000
Obtaining Mott-Schottky plots
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