研究目的
To improve the photo-generated electron-hole pairs separation of BiOBr by coupling novel bismuth oxyfluoride or other species containing bismuth, and to assess their photocatalytic performances by degradation of rhodamine B (RhB) under visible light illumination.
研究成果
The BiOBr/Bi2O3/BiO0.67F1.66 ternary composites showed enhanced photocatalytic performances compared to pure BiOBr, attributed to their larger specific surface areas and multiple charge carrier transfer pathways. The composite with Br/F molar ratio of 1:1 achieved the highest activity, degrading 98.61% of RhB after just 15min irradiation.
研究不足
The study focuses on the photocatalytic degradation of RhB under visible light illumination, and the performance under other conditions or for other pollutants is not explored.
1：Experimental Design and Method Selection:
BiOBr/Bi2O3/BiO
2：67F66 ternary composites were prepared via a facile chemical precipitation method. Sample Selection and Data Sources:
The samples were prepared by adjusting the molar ratio of Br to F in the reaction system.
3：List of Experimental Equipment and Materials:
Bi(NO3)3·5H2O, NaBr, NH4F, tetrahydrofuran (THF), and deionized water were used as the bismuth source, bromine source, fluorine source, and reaction medium, respectively.
4：Experimental Procedures and Operational Workflow:
The reaction system was subjected to magnetic stirring for 5 h at room temperature. The product was separated centrifugally, washed with ethanol and deionized water, and dried in air at 80°C.
5：Data Analysis Methods:
The photocatalytic performances were evaluated by RhB photo-degradation under visible light illumination.
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 powder diffraction
Bruker D8 ADVANCE
Bruker
To study the crystal phases of the as-synthesized photocatalysts.
-
X-ray photoelectron spectroscopy
Thermo escalab 250Xi
Thermo
To record XPS spectra.
-
EPR spectra
Bruker-A300-10/12
Bruker
To obtain EPR spectra.
-
Total organic carbon analyzer
TOC-L CPH
Shimadzu
For mineralization degree analysis of dye solutions.
-
Scanning electron microscopy
SU8020
To examine the sample microstructure.
-
Transmission electron microscopy
Tecnai G2 F20 S-TWIN
To examine the sample microstructure.
-
BET specific surface areas analyzer
Micromeritics ASAP 2460
Micromeritics
To detect the BET specific surface areas of the photocatalysts.
-
UV-Vis diffuse reflectance spectra
UV-2450
To measure UV-Vis diffuse reflectance spectra.
-
Photoluminescence spectra
iHR320
To carry out PL spectra.
-
登录查看剩余7件设备及参数对照表
查看全部
