研究目的
To investigate the photocatalytic performance of MIL-101(Fe) for NOx degradation under various operating parameters and determine the optimum conditions for efficient de-NOx process.
研究成果
MIL-101(Fe) demonstrated high photocatalytic efficiency for NOx degradation, with up to 77% conversion under optimal conditions (alumina substrate, 0.1 g catalyst, 350 ppb initial NO, 40-50% RH, solar light). It outperformed commercial TiO2-P25 by 8% with less NO2 release. The study provides insights into parameter optimization and highlights the potential of Fe-based MOFs for air purification.
研究不足
The study is limited to laboratory-scale experiments with specific conditions; scalability to real-world applications may require further optimization. The competition between water and NO for active sites could affect long-term stability, and the use of non-porous substrates may not fully utilize the porosity of MIL-101(Fe).
1：Experimental Design and Method Selection:
The study used a continuous flow reactor designed following ISO 22197-1 standard. MIL-101(Fe) was synthesized via microwave-solvothermal method and characterized using XRD, SEM, FT-IR, UV-Vis DRS, and BET analysis. Photocatalytic tests were conducted under simulated solar light.
2：Sample Selection and Data Sources:
MIL-101(Fe) powder was synthesized from iron(III) chloride and benzene-1,4-dicarboxylic acid. NO gas (2.1 ppm in N2) and zero-air were used as inlet gases.
3：1 ppm in N2) and zero-air were used as inlet gases. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes microwave synthesizer (Wave Magic MWO-1000S, EYELA Co.), X-ray diffractometer (Rigaku), SEM (JEOL-2020), FT-NIR spectrometer (Bruker Optik, Vertex 70), UV-Vis DRS (JASCO 570), BET analyzer (Micromeritics ASAP 2020), xenon arc lamp (Abet Technologies, LS-150), and NOx analyzer (Horiba, APNA-370). Materials include FeCl3·6H2O, H2BDC, DMF, NO gas, and various substrates (aluminum ceramic, FTO glass, n-glass).
4：0). Materials include FeCl3·6H2O, H2BDC, DMF, NO gas, and various substrates (aluminum ceramic, FTO glass, n-glass). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: MIL-101(Fe) was synthesized, characterized, and coated on substrates. The reactor was set up with controlled gas flow, light intensity, and humidity. After adsorption-desorption equilibrium, light was turned on, and NOx concentrations were monitored over time.
5：Data Analysis Methods:
Data on NO and NO2 concentrations were analyzed to calculate conversion efficiencies. Statistical analysis was performed to compare effects of different parameters.
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scanning electron microscope
JEOL-2020
JEOL
Used for examining morphology and particle size of samples.
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FT-NIR spectrometer
Vertex 70
Bruker Optik
Used for obtaining infrared spectra of samples.
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UV-Vis diffuse reflectance spectrophotometer
NIR JASCO 570
JASCO
Used for recording light absorption ability of samples.
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microwave synthesizer
MWO-1000S
EYELA
Used for synthesizing MIL-101(Fe) via microwave-solvothermal method.
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X-ray diffractometer
Rigaku
Used for XRD analysis to confirm the synthesis of MIL-101(Fe).
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BET analyzer
ASAP 2020
Micromeritics
Used for analyzing surface area and pore volume via nitrogen adsorption-desorption.
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xenon arc lamp
LS-150
Abet Technologies
Used as a simulated solar light source for photocatalytic experiments.
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NOx analyzer
APNA-370
Horiba
Used for detecting concentrations of NO, NO2, and NOx after photocatalytic reaction.
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