研究目的
To find a ubiquitous and low-cost cocatalyst to enhance the photocatalytic activity of WO3 for indoor environmental remediation, as an alternative to expensive and precious metals like Pt.
研究成果
Loading red clay as a cocatalyst on WO3 significantly enhances its photocatalytic activity under visible light, with a 10 wt% mixture showing the highest performance, surpassing even Pt-loaded WO3. This is attributed to the clay's ability to promote H2O2 decomposition and charge separation, utilizing abundant and low-cost materials. The method is eco-friendly and waste-free, suggesting potential for indoor air purification applications.
研究不足
The study uses a specific type of red clay (Akadama soil), which may limit generalizability. The photocatalytic evaluation is based on a model reaction (2-propanol decomposition), and real-world applications might involve more complex contaminants. The simple kneading method might not optimize all parameters, and long-term stability or scalability is not addressed.
1：Experimental Design and Method Selection:
The study aimed to develop a mixture photocatalyst of WO3 and red clay using a simple kneading method to enhance visible-light photocatalytic activity for decomposing organic contaminants.
2：Sample Selection and Data Sources:
Red clay (Akadama soil) preheated to 673 K was crushed and mixed with WO3 in weight ratios of 1:100, 5:100, 10:100, and 50:
3：List of Experimental Equipment and Materials:
1 Equipment included XRD (X'pert Pro), UV-Vis spectrophotometer (UV-2500PC), XPS (AXIS-HS), surface analyzer (Gemini 2360), ICP-OES (ICPS-8100), gas chromatograph (GC-14B), spectroradiometer (UV-40), and filters (Y-44, B390, HA-30). Materials included WO3, red clay, 2-propanol, and various chemicals for analysis.
4：0). Materials included WO3, red clay, 2-propanol, and various chemicals for analysis. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Samples were prepared by kneading mixtures, drying at 343 K for 5 h. Photocatalytic activity was evaluated in a glass reactor by decomposing 2-propanol into CO2 under visible light irradiation (400-530 nm), with concentrations measured by gas chromatography. H2O2 generation was assessed using the DMP method.
5：Data Analysis Methods:
Data were analyzed using XRD for crystal structure, UV-Vis for optical absorption, XPS for chemical states, BET for surface area, and statistical methods for reaction rates.
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
X'pert Pro
PANalytical B.V.
Measurement of crystal structures
-
UV-Vis spectrophotometer
UV-2500PC
Shimadzu Corp.
Evaluation of optical absorption spectra
-
X-ray photoelectron spectroscope
AXIS-HS
Kratos Analytical Ltd.
Measurement of surface chemical states
-
Inductively coupled plasma optical emission spectroscope
ICPS-8100
Shimadzu Corp.
Estimation of chemical composition
-
Gas chromatograph
GC-14B
Shimadzu Corp.
Measurement of IPA and CO2 concentrations
-
Spectroradiometer
UV-40
Ushio Inc.
Measurement of light intensity
-
Surface analyzer
Gemini 2360
Micromeritics Co.
Evaluation of specific surface area
-
Xe lamp
300 W
Light source for visible-light irradiation
-
Red clay
Akadama soil
Tachikawa Heiwa Nouen Co. Ltd.
Used as a cocatalyst in the mixture photocatalyst
-
登录查看剩余7件设备及参数对照表
查看全部
