研究目的
To boost the photocatalytic performance of BiOI through morphology control and constructing p-n heterojunction with Bi2WO6 for the degradation of organic pollutants under visible-light irradiation.
研究成果
Bi2WO6/BiOI microspheres with 3% content of Bi2WO6 (BWOI-3) exhibited the best photocatalytic performance and durability. The formation of p-n heterojunction significantly improved the separation efficiency of electron-hole pairs, enhancing the photocatalytic activity. This work presents a novel method for synthesizing visible-light-driven photocatalysts with potential applications in water purification.
研究不足
The study focuses on the degradation of specific organic pollutants (MO and BPA) under visible-light irradiation. The scalability and practical application in real wastewater treatment scenarios are not addressed.
1：Experimental Design and Method Selection:
Wet-chemical method at room temperature for BiOI synthesis and microwave-assisted synthetic method for Bi2WO6/BiOI microspheres preparation.
2：Sample Selection and Data Sources:
Bi(NO3)3·5H2O and KI as precursors, different solvents (distilled water, absolute alcohol, ethylene glycol) for BiOI synthesis, Na2WO4·2H2O for Bi2WO6/BiOI composites.
3：List of Experimental Equipment and Materials:
XRD (D/Max-IIIC), SEM (S-4800), TEM (Tecnai G2 F20 S-Twin), EDS, HRTEM, XPS (PHI-5000CESCA), UV-vis spectrophotometer (UV-2550), BET (Quantachrome Nova 4200e), electrochemical station (CHI650D).
4：Experimental Procedures and Operational Workflow:
Synthesis of BiOI photocatalysts, fabrication of Bi2WO6/BiOI microspheres, characterization, photocatalytic experiments.
5：Data Analysis Methods:
XRD for phase identification, SEM and TEM for morphology, BET for surface area, UV-vis for optical properties, PC and EIS for charge separation efficiency.
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