研究目的
Investigating the role of surface grafted cocatalyst (CrxO, CoxO, CuxO, Pt) in catalytic removal of gaseous acetaldehyde pollutant under blue light at 333 K, comparing the efficiency between photocatalysis (PC) and photothermalcatalysis (PTC), and understanding the synergistic effect between defect-related blue-light absorption, cocatalyst induced interfacial charge transfer and matched surface red-ox reaction rate.
研究成果
The study concludes that photothermalcatalysis (PTC) prefers less hole-type cocatalyst than photocatalysis (PC) for the removal of volatile organic compounds (VOC) under blue light. The difference between PC and PTC is attributed to the synergistic effect between defect-related blue-light absorption, cocatalyst induced interfacial charge transfer, and matched surface red-ox reaction rate. This work provides new insight into the design and development of photothermalcatalyst for VOC removal.
研究不足
The study focuses on the catalytic removal of gaseous acetaldehyde pollutant under blue light at 333 K, and the findings may not be directly applicable to other pollutants or under different conditions. The difference between PC and PTC is attributed to synergistic effects that may vary with different cocatalysts or photocatalysts.
1：Experimental Design and Method Selection:
The study revisits ST-01 TiO2 photocatalyst as photothermalcatalyst under blue light at 333 K, investigating the role of surface grafted cocatalyst in catalytic removal of gaseous acetaldehyde pollutant.
2：Sample Selection and Data Sources:
ST-01 TiO2 photocatalyst grafted with cocatalyst (CrxO, CoxO, CuxO, Pt) was used.
3：List of Experimental Equipment and Materials:
Blue LED lights (470nm, 200 mW), gas chromatograph (SP-2100A, BFRL Co.), X-ray diffraction (XRD, Rigaku, D/max-2500 X-ray diffractometer), Raman spectra (J-Y UV-lamb micro-Raman spectrometer), UV–vis diffuse reflectance (DR) spectra (Lambda 900 UV–vis-NIR spectro-photometer), X-ray photoelectron spectroscopy (XPS, VGESCA-LAB MKII instrument), Photoluminescence spectra (PL; Jobin-Yvon HR800 instrument), Inductively Coupled Plasma Mass Spectrometry (ICP; Leeman, Plodigy ICP-AES), transient photovoltage (TPV) spectra.
4：Experimental Procedures and Operational Workflow:
The photocatalytic and photothermalcatalytic activities were tested by degradation of gaseous acetaldehyde under irradiation of blue LED lights.
5：Data Analysis Methods:
The degradation of acetaldehyde and the generation of carbon dioxide were monitored by a gas chromatograph.
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