A kind of nf-bi2o3-sba visible light response photocatalyst and its preparation method and application
A 3-SBA, nf-bi2o3-sba technology, applied in the field of photocatalytic materials, can solve the problem of low utilization efficiency of visible light
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Embodiment 1
[0055] (1) NF-Bi 2 o 3 -The preparation of SBA photocatalyst, the steps are as follows:
[0056] (1) Take 2.08g of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10ml of ethylene glycol, stirred, and after the dissolution was complete, 1g of SBA was added, ultrasonically dispersed for 60min, and dried in an oven at 185°C to obtain Bi(NO 3 ) 3 - SBA solid, which is ground into a fine powder;
[0057] (2) After drying 0.3g NH 4 Put F into a mortar, add ethanol dropwise to partially dissolve it, add 0.3g Bi(NO 3 ) 3 -SBA powder is ground evenly, then transferred to a crucible, in a muffle furnace, the temperature is raised to 500°C at 5°C / min, and calcined for 180min;
[0058] (3) Grind after calcination, wash 5 times with deionized water, centrifuge at 10000r / min, dry, and grind into fine powder again to obtain the target photocatalyst NF-Bi 2 o 3 -SBA.
[0059] (2) Bi 2 o 3 The preparation of photocatalyst, the steps are as follows:
Embodiment 2
[0066] Take 0.1g of prepared catalyst Bi 2 o 3 、NF-Bi 2 o 3 、 Bi 2 o 3 -SBA and NF-Bi 2 o 3 - Dissolve SBA in 0.25mL ethylene glycol, ultrasonically disperse for 30min, drop-coat on conductive glass (FTO) (6cm*1cm) pasted with conductive adhesive, drop-coating size is 1cm*1cm, apply once, 40μL each time , dried under vacuum at 80°C to obtain Bi 2 o 3 、NF-Bi 2 o 3 、 Bi 2 o 3 -SBA and NF-Bi 2 o 3 -SBA electrodes.
[0067] The four photocatalytic electrodes were placed in Na 2 SO 4 (0.1mol / L), Na 2 SO 3(0.1mol / L) mixed solution, under the 3-electrode system of the electrochemical workstation, the photocatalytic electrode is used as the working electrode, the platinum sheet is used as the counter electrode, the silver electrode is used as the reference electrode, and the xenon lamp is used as the light source. Next, the dark is alternated, and the photocurrent density map of the photocatalytic electrode is obtained.
[0068] Figure 1(a) and Figure 1(b) are the ...
Embodiment 3
[0072] The NF-Bi prepared by embodiment 2 2 o 3 、 Bi 2 o 3 -SBA and NF-Bi 2 o 3 -SBA photocatalytic electrodes were placed in Na with a concentration of 0.5mol / L 2 SO 4 In the solution, under the three-electrode system of the electrochemical workstation, the photocatalytic electrode was used as the working electrode, the platinum sheet was used as the counter electrode, the silver electrode was used as the reference electrode, and the xenon lamp was used as the light source. AC impedance graph.
[0073] figure 2 for NF-Bi 2 o 3 - AC impedance diagram of the SBA photocatalytic electrode under visible light and in the dark.
[0074] Figure 3(a) and Figure 3(b) are the AC impedance diagrams of the three electrodes under visible light and in the dark, respectively.
[0075] Such as figure 2 As shown, NF-Bi under light conditions 2 o 3 - SBA's AC impedance loop radius has been reduced. Since the resistance of the charge transfer of the photocatalyst and the separatio...
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