研究目的
Investigating the synthesis of flower-like AgI/BiOCOOH p-n heterojunctions for enhanced visible-light photocatalytic performance for the removal of toxic pollutants.
研究成果
The AgI/BiOCOOH heterojunctions exhibited much higher activity in the photocatalytic degradation of industrial dyes and antibiotics under visible light compared to pristine BiOCOOH and AgI. The synergy effect on photocatalytic performance can be ascribed to the p-n heterostructure with improving visible-light absorption and promoting the separation of electron and holes. This work indicates that the well-designed AgI/BiOCOOH heterojunction could be potentially employed to remedy environment.
研究不足
The study focuses on the photocatalytic degradation of specific pollutants under visible light, and the stability of the photocatalyst over multiple cycles shows a slight decline in activity, possibly due to catalyst loss and the production of a small amount of Ag0 after cycling tests.
1：Experimental Design and Method Selection:
The study involved a two-step procedure for constructing flower-like AgI/BiOCOOH heterojunctions, starting with solvothermal synthesis of BiOCOOH microflowers followed by AgI modification using a precipitation method.
2：Sample Selection and Data Sources:
Bi(NO3)3?5H2O, glycerol, N,N-dimethyformamide (DMF), methyl blue (MB), tetracycline hydrochloride (TC), rhodamine B (RhB), AgNO3, KI, iso-propanol (IPA), ammonium oxalate (AO), and p-benzoquinone (BQ) were used.
3：List of Experimental Equipment and Materials:
Instruments included a Bruker D8 Advance diffractometer, Hitachi S?4800 scanning electron microscope (SEM), JEM?2010F transmission electron microscope, Shimadzu UV?2600 UV–vis spectrophotometer, Hitachi F-7000 fluorescence spectrophotometer, and Micromeritics ASAP 2020 equipment.
4：Experimental Procedures and Operational Workflow:
The photocatalytic degradation of RhB, MB, or TC was executed to evaluate the activity of catalysts under visible light.
5：Data Analysis Methods:
The concentrations of solutions were determined by using a UV?2600 spectrophotometer. Total organic carbon (TOC) experiments were conducted by the photocatalytic degradation of RhB solution.
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