研究目的
Investigating the synthesis and photocatalytic performance of 3D hierarchical Bi@BiOCl microspheres using citric acid as a modulating agent.
研究成果
The citric acid-modulated 3D hierarchical Bi@BiOCl microspheres exhibited enhanced photocatalytic performance due to larger specific surface areas, higher absorptivity to visible light, and better charge transfer ability. This work provides insights into simultaneous size control and in situ metal deposition for Bi-containing photocatalysts.
研究不足
The study focuses on the synthesis and photocatalytic performance of Bi@BiOCl microspheres, with potential limitations in scalability and practical application under varying environmental conditions.
1：Experimental Design and Method Selection:
A facile solvothermal method was employed using citric acid as a modulating agent.
2：Sample Selection and Data Sources:
Bi(NO3)3·5H2O and KCl were used as precursors in ethylene glycol.
3：List of Experimental Equipment and Materials:
Te?on-lined stainless-steel autoclave, X-ray diffractometer (XD-2), FESEM (Zeiss ULTRA 55), TEM and HR-TEM (JEOL 2100F), FTIR spectra (Shimadzu IR Prestige-21), XPS spectra (Thermo Fisher ESCALAB 250Xi), BET surface areas (ASAP 2010), UV–Vis DRS (Cary 5000), photoluminescence performances (SHIMADZU RF-5301PC).
4：Experimental Procedures and Operational Workflow:
The mixed solution was stirred for 2 h, poured into an autoclave, and reacted for 12 h at 160°C. The product was filtered, washed, and dried.
5：Data Analysis Methods:
XRD, SEM, TEM, HR-TEM, FTIR, XPS, BET, UV–Vis DRS, PL spectra analysis.
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X-ray diffractometer
XD-2
Analyzing the crystal structures of the as-prepared samples
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FESEM
Zeiss ULTRA 55
Obtaining the FESEM results
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TEM and HR-TEM
JEOL 2100F
Conducting TEM and HR-TEM analysis
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FTIR spectra
Shimadzu IR Prestige-21
Obtaining the FTIR spectra
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XPS spectra
Thermo Fisher ESCALAB 250Xi
Obtaining the XPS spectra
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BET surface areas
ASAP 2010
Micro-meritics Inc.
Calculating the BET surface areas and total pore volumes of the products
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UV–Vis DRS
Cary 5000
Analyzing the optical absorption characteristics of the products
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Photoluminescence performances
SHIMADZU RF-5301PC
Testing the photoluminescence performances of the products
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Electrochemical workstation
SP-150
Obtaining the corresponding transient photocurrent responses and the EIS Nyquist plots
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