研究目的
Preparation of interstitial carbon doped BiOI for enhanced performance in photocatalytic nitrogen fixation and methyl orange degradation.
研究成果
Carbon-doped BiOI photocatalysts were successfully synthesized and exhibited enhanced photocatalytic activities for methyl orange degradation and nitrogen fixation due to improved charge separation, reduced band gap, increased surface area, and modified morphology. The interstitial carbon doping disrupts lattice periodicity and generates vacancies, leading to higher efficiency. Optimal performance depends on carbon content, with C-BiOI-2 best for MO degradation and C-BiOI-3 for N2 fixation. The work provides insights into designing carbon-doped semiconductors for photocatalysis.
研究不足
The study is limited to specific synthesis conditions (hydrothermal method at 160°C for 24h) and glucose amounts. The carbon doping mechanism (interstitial vs. substitutional) requires further confirmation. Surface carbon species may not fully contribute to charge separation, and optimal carbon content varies for different photocatalytic reactions (MO degradation vs. N2 fixation). The experiments were conducted under controlled laboratory conditions, and scalability or real-world application constraints are not addressed.
1：Experimental Design and Method Selection:
A hydrothermal method was used to synthesize carbon-doped BiOI (C-BiOI) photocatalysts with Bi(NO3)3·5H2O, KI, and glucose as raw materials. The method involved dissolving Bi(NO3)3·5H2O in HNO3, adding glucose, sonicating, mixing with KI solution, adjusting pH to 7 with NH3·H2O, and heating in a Teflon-lined autoclave at 160°C for 24h. Variable carbon doping was achieved by changing glucose amounts.
2：4h. Variable carbon doping was achieved by changing glucose amounts. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Samples included pure BiOI and C-BiOI with different glucose amounts (0.005g, 0.01g, 0.025g, 0.075g), denoted as C-BiOI-1, C-BiOI-2, C-BiOI-3, C-BiOI-4. Reagents were purchased from Sinopharm Chemical Reagent Co., Ltd. (China).
3：005g, 01g, 025g, 075g), denoted as C-BiOI-1, C-BiOI-2, C-BiOI-3, C-BiOI-Reagents were purchased from Sinopharm Chemical Reagent Co., Ltd. (China). List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included a Teflon-lined stainless-steel autoclave, centrifuge, sonicator, magnetic stirrer, and various characterization instruments (N2-adsorption, XRD, SEM, TEM, Raman, XPS, DRS, PL, EIS, photocurrent response). Materials included Bi(NO3)3·5H2O, KI, glucose, HNO3, NH3·H2O, deionized water, ethanol, methyl orange (MO), ethanol for N2 fixation.
4：Experimental Procedures and Operational Workflow:
Synthesis involved mixing solutions, hydrothermal treatment, centrifugation, washing, drying. Photocatalytic tests included MO degradation under visible light and N2 fixation under simulated sunlight, with adsorption-desorption equilibrium in dark, irradiation, and sampling for analysis. Characterization techniques were applied to analyze structure, morphology, optical properties, and charge separation.
5：Data Analysis Methods:
Data were analyzed using XRD for crystal structure, XPS for chemical states, BET for surface area, DRS for band gap calculation (using αhv = A(hv?Eg)^(n/2), PL, EIS, and photocurrent for charge separation. Kinetic analysis for MO degradation used ln(C0/Ct)=kt. Statistical methods included comparison of rates and efficiencies.
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-
Teflon-lined stainless-steel autoclave
100 mL
Used for hydrothermal synthesis of photocatalysts at high temperature and pressure.
-
X-ray diffractometer
Used for XRD analysis to examine crystalline structures of samples.
-
SEM
Used for morphology investigation via scanning electron microscopy.
-
TEM
Used for microstructure analysis via transmission electron microscopy.
-
Raman spectrometer
Used for Raman spectra recording to identify structural information.
-
XPS
Used for X-ray photoelectron spectroscopy to analyze chemical states.
-
DRS
Used for UV–vis diffuse reflectance spectroscopy to measure optical absorption properties.
-
PL spectrometer
Used for photoluminescence spectroscopy to investigate charge separation efficiency.
-
EIS
Used for electrochemical impedance spectroscopy to study charge migration property.
-
Photocurrent response equipment
Used for transient photocurrent response measurements under simulated sunlight.
-
N2 adsorption-desorption equipment
Used for BET analysis to determine surface area and pore characteristics.
-
登录查看剩余9件设备及参数对照表
查看全部
