研究目的
To synthesize and characterize 2D ultra-thin WO3 nanosheets with dominant {002} crystal facets for enhanced xylene sensing and methyl orange photocatalytic degradation performance.
研究成果
The synthesized 2D ultra-thin WO3 nanosheets exhibit superior xylene sensing and methyl orange photocatalytic degradation due to high {002} facet exposure and large surface area, providing insights for designing high-performance metal oxide materials for environmental applications.
研究不足
The response and recovery rates of the gas sensors are slow due to low operation temperature, and the synthesis method may have constraints in scalability or reproducibility for industrial applications.
1：Experimental Design and Method Selection:
A surfactant-induced self-assembly method using Pluronic P123, ethanol, and water as structure-directing agents to synthesize monoclinic WO3 ultra-thin nanosheets with controlled thickness and exposed facets.
2：Sample Selection and Data Sources:
WO3 samples synthesized with varying amounts of P123 for comparison (2D-WO3, TS-WO3, NP-WO3).
3：3). List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Materials include Pluronic P123, WCl6, ethanol, deionized water; equipment includes autoclave, SEM (ZEISS EVO), TEM (JEM-2100), XRD (Bruker D8 advance), XPS (Thermo Fisher Scientific Escalab 250Xi), BET analyzer (BELSORP-mini II), UV-Vis spectrometer (UV3600-MPC3100, Hitachi U-3310), PL spectrometer (Fluoro MAX-4 by HORIBA Jobin Yvon), gas sensing system (Huachuang Ruike Science and Technology Co. Ltd.), photochemical reaction instrument (Shanghai Yuming Instrument Co. Ltd.), electrochemical workstation (CHI 760D).
4：Experimental Procedures and Operational Workflow:
Synthesis involved solvothermal treatment at 120°C for 5h, followed by washing and drying. Characterization included SEM, TEM, XRD, XPS, BET, UV-Vis, PL. Gas sensing tests measured resistance changes in a static system; photocatalytic tests involved degradation of methyl orange under Xe lamp irradiation; photoelectrochemical measurements used a three-electrode system.
5：Data Analysis Methods:
Response defined as Ra/Rg ratio; photocatalytic rate constants calculated from UV-Vis absorption; statistical analysis of sensing and catalytic performance.
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SEM
EVO
ZEISS
Recording scanning electron microscopy images for morphological analysis.
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XRD
D8 advance
Bruker
Evaluating X-ray diffraction patterns for crystal structure analysis.
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XPS
Escalab 250Xi
Thermo Fisher Scientific
Conducting X-ray photoelectron spectroscopy measurements for chemical state analysis.
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PL spectrometer
Fluoro MAX-4
HORIBA Jobin Yvon
Carrying out photoluminescence spectra for recombination rate analysis.
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TEM
JEM-2100
Collecting transmission electron microscopy images for structural analysis.
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BET analyzer
BELSORP-mini II
Conducting nitrogen adsorption-desorption measurements for specific surface area analysis.
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UV-Vis spectrometer
UV3600-MPC3100
Recording UV-Vis absorption spectra for light absorption property analysis.
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Gas sensing system
Huachuang Ruike Science and Technology Co. Ltd.
Testing gas sensing properties in a static measuring system.
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Photochemical reaction instrument
Shanghai Yuming Instrument Co. Ltd.
Irradiating samples with Xe lamp for photocatalytic activity tests.
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Electrochemical workstation
CHI 760D
Conducting transient photocurrent measurements in a three-electrode system.
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Xe lamp
500 W
Providing light irradiation for photoelectrochemical and photocatalytic experiments.
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