BiOI composite material and preparation method and application of BiOI composite material
A composite material and reaction technology, applied in chemical instruments and methods, light water/sewage treatment, energy wastewater treatment, etc., can solve the problems of low solar energy utilization rate, narrow spectral response range, low photon quantum efficiency, etc., to prevent toxic disinfection By-product generation, excellent stability, and high removal efficiency
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Embodiment 1
[0040] Example 1 Preparation of BiOI
[0041] Dissolve 1.66g KI in 60 mL ethylene glycol, stir with a magnetic stirrer for 30min, then add 4.85g Bi(NO 3 ) 3 ·5H 2 O, continue stirring for 2.0 h to obtain a uniformly distributed yellow transparent liquid. Pour the transparent liquid obtained above into an autoclave, heat at 160 °C for 12, and cool to room temperature to obtain a yellow precipitate, centrifuge at 3000 rpm for 20 min, filter with a 0.22 μm water filter, and filter the product with ethanol and deionized water respectively Wash 5 times, and dry at 55°C to obtain BiOI.
Embodiment 2
[0042] Example 2 Ag / BiOI composite material removes Escherichia coli under visible light
[0043] The preparation method of the Ag / BiOI composite material is as follows: 1.0 g BiOI powder and 0.079 g AgNO 3 Add 40 mL of deionized water containing 10 mmol / L of HCOOH. The above mixed liquid was ultrasonicated for 30 min and then stirred to obtain a uniform BiOI and AgNO 3 Mixture. A 500 W high-pressure mercury lamp was used to irradiate the mixture for 30 min, and stirring was carried out during the irradiation process, so that Ag was evenly loaded on the surface of BiOI. After the above reaction, the Ag / BiOI composite catalyst (abbreviated as 5.0%Ag / BiOI) with Ag doping content (wt.%) of 5.0% was obtained by filtering through a 0.22 μm water filter membrane.
[0044] The photocatalytic treatment device used in the experiment is as follows: figure 1 As shown, the device includes a 400 W iodine-gallium lamp (irradiation wavelength greater than 420 nm, Shanghai Aojia Lightin...
Embodiment 3
[0048] Example 3 Pt / BiOI composite material removes Escherichia coli under visible light
[0049] The preparation method of Pt / BiOI composite material is as follows: 1.0 g BiOI powder was placed in 40 mL of 2.2 mmol / L chloroplatinic acid solution containing 10 mmol / L HCOOH. The above mixed liquid was ultrasonicated for 30 min and then stirred to obtain a uniform mixture of BiOI and chloroplatinic acid. A 500 W high-pressure mercury lamp was used to irradiate the mixture for 30 min, and stirring was carried out during the irradiation process, so that Pt was uniformly loaded on the surface of BiOI. After the above reaction was completed, a Pt / BiOI composite catalyst with a Pt doping content (wt.%) of 2.0% (abbreviated as 2.0% Pt / BiOI) was obtained by filtering through a 0.22 μm water filter membrane.
[0050] The photocatalytic treatment device used in the experiment is as follows: figure 1 As shown, the device was used to remove Escherichia coli. The treatment object is Es...
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