研究目的
To prepare Pd-loaded TiO2 nanowire catalysts using the hydrothermal method and evaluate their photocatalytic activity for the photoreduction of CO2 into methane and carbon monoxide.
研究成果
Pd/TiO2 nanowires, especially with 0.5 wt% Pd loading, are efficient photocatalysts for CO2 reduction to CH4 and CO, with high yields and good reusability. The proposed mechanism involves enhanced charge separation and active sites provided by Pd nanoparticles.
研究不足
The study focused on gas-solid interface reactions, so liquid-phase products like methanol were not measured. The use of UV light limits applicability to solar energy conversion, and the stability test was only for 30 days, which may not cover long-term degradation.
1：Experimental Design and Method Selection:
The study used the hydrothermal method to synthesize TiO2 nanowires and loaded them with Pd nanoparticles. Photocatalytic activity was evaluated under UV irradiation in a gas-solid interface reactor.
2：Sample Selection and Data Sources:
Samples included TiO2 nanowires with different Pd loadings (0.1 wt%, 0.5 wt%, 1.0 wt%), prepared from titanium isopropoxide, palladium nitrate, and other reagents. Data were collected from characterization techniques and photocatalytic performance tests.
3：1 wt%, 5 wt%, 0 wt%), prepared from titanium isopropoxide, palladium nitrate, and other reagents. Data were collected from characterization techniques and photocatalytic performance tests. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included autoclave for hydrothermal synthesis, X-ray diffractometer (Shimadzu XRD-6000), UV-vis spectrometer (Shimadzu UV-2550), TEM (JEM2100F), SEM (Nova NanoSEM 230), ICP-AES (Thermo IRIS Intrepid II), PL spectrofluorometer (Edinburgh Fs5), XPS (PHI-5000), and gas chromatography (Gas Chromatography Personal GC 1000). Materials included titanium isopropoxide, palladium nitrate, sodium borohydride, ethanol, ethanolamine, hydrochloric acid, and deionized water.
4：0). Materials included titanium isopropoxide, palladium nitrate, sodium borohydride, ethanol, ethanolamine, hydrochloric acid, and deionized water. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: TiO2 nanowires were synthesized hydrothermally at 150°C for 16 or 24 hours, followed by Pd loading using NaBH4 reduction. Photocatalytic tests involved degassing the reactor, introducing CO2 and water vapor, irradiating with a 400 W Hg lamp, and analyzing effluent gases with GC.
5：Data Analysis Methods:
Data were analyzed using XRD for crystal structure, UV-vis for absorption, TEM/SEM for morphology, ICP-AES for Pd content, PL for charge separation, XPS for chemical states, and GC for product yields. Statistical analysis included triplicate experiments.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
X-ray diffractometer
XRD-6000
Shimadzu
Characterization of crystal structure of photocatalysts
-
UV-vis spectrometer
UV-2550
Shimadzu
Measurement of UV-vis absorption spectra
-
Transmission electron microscope
JEM2100F
JEOL
Acquisition of TEM images for morphology analysis
-
Scanning electron microscope
Nova NanoSEM 230
FEI
Acquisition of SEM images for morphology analysis
-
ICP-AES
IRIS Intrepid II
Thermo
Detection and identification of Pd metal loadings
-
Spectrofluorometer
Fs5
Edinburgh Instruments
Measurement of photoluminescence spectra
-
XPS instrument
PHI-5000
ULVAC-PHI
Determination of elemental chemical state and composition
-
Gas chromatography
Personal GC 1000
China
Analysis of effluent gases from photocatalytic reaction
-
Hg lamp
400 W
Light source for photocatalytic irradiation
-
Autoclave
Hydrothermal synthesis of TiO2 nanowires
-
Milli-Q water purification system
Millipore Corp
Production of deionized water for experiments
-
登录查看剩余9件设备及参数对照表
查看全部
