研究目的
To investigate the photocatalytic activity of B, N-codoped TiO2 prepared by a new molten nitrate process for the removal of methylene blue (MB) under visible light irradiation.
研究成果
The B, N-codoped TiO2 prepared by the new molten nitrate process exhibited superior photocatalytic activity for the degradation of MB under visible light irradiation compared to B-doped TiO2 and pure TiO2. The best performance was achieved at a calcination temperature of 550 °C.
研究不足
The study focuses on the photocatalytic activity under visible light irradiation and the effect of calcination temperature on the performance of B, N-codoped TiO2. Other factors such as the effect of different dopant concentrations and the long-term stability of the photocatalyst were not investigated.
1：Experimental Design and Method Selection:
The B, N-codoped TiO2 was prepared by the sol–gel method followed by a molten nitrate process. The photocatalytic activity was evaluated by the degradation of MB under visible light irradiation.
2：Sample Selection and Data Sources:
The samples were characterized by XRD, XPS, BET, SEM, TEM, SAED, and FTIR.
3：List of Experimental Equipment and Materials:
Tetrabutyl titanate, acetic acid, sodium nitrate, potassium nitrate, titanium dioxide (Degussa P25), ethanol, diboron trioxide, potassium bromine, barium sulfate, and methylene blue were used.
4：Experimental Procedures and Operational Workflow:
The B-doped TiO2 was prepared by adding tetrabutyl titanate into acetic acid solution, followed by the addition of boric acid. The mixture was hydrothermally treated, dried, and then annealed. The photocatalytic activity was evaluated by degrading MB under visible light irradiation.
5：Data Analysis Methods:
The degradation of MB was measured using a UV/vis spectrophotometer at 662 nm.
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X-ray diffraction
Rigaku D/max
Rigaku
Identify the crystal phase of the samples
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scanning electron microscopy
JEOL S-500
JEOL
Examine the morphology and crystalline structure of the samples
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transmission electron microscopy
JEOL JEM-2100F
JEOL
Examine the particle size, crystallinity and morphology of samples
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Fourier Transform Infrared spectroscopy
Perkin Elmer
Perkin Elmer
Identify the weak complex vibrations between the Ti–O oxide species
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UV-vis absorption spectra
Perkin-Elmer, Lambda 900
Perkin-Elmer
Record the UV-vis absorption spectra of the samples
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X-ray photoelectron spectroscopy
Measure the elemental composition of the samples
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Brunauer-Emmett-Teller
Auto-sorb iQ Station-I
Quantachrome Instruments
Evaluate the porous structure of the boron-doped TiO2 materials
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