Method for catalytically degrading gas-phase pollutants through nanosheets Zn2SnO4/Bi2WO6
A catalytic degradation and nanosheet technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that photogenerated electrons cannot reach the catalyst surface and improve catalytic efficiency To achieve the effect of good visible light absorption performance, easy operation, and suitable for industrial production
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Embodiment 1
[0021] (1) 2.5mmol ZnCl 2 and 1.25mmol SnCl 4 ·5H 2 O was dissolved in a mixture of 20mL deionized water and 20mL ethanol, and 10mL of 1.0M NaOH solution was added dropwise under stirring, and the stirring was continued for about 15min. Heating at 200°C for 24 hours to obtain precipitate I, which was washed three times with water and ethanol respectively, and then dried at 60°C to obtain Zn 2 SnO 4 powder.
[0022] (2) Preparation of Zn 2 SnO 4 / Bi 2 WO 6 Nanosheets, the synthesis steps are as follows: 3.92gBi(NO 3 ) 3 ·5H 2 O dissolved in 30 mL of 5.0 M CH 3 COOH aqueous solution, to obtain solution a; 1.33gNa 2 WO 4 2H 2 O was dissolved in 48mL deionized water to obtain solution b; at room temperature, solution b was added dropwise to solution a, after stirring for 60min, the pH value was adjusted to 7 with ammonia water, and 0.0846g Zn 2 SnO 4 Add the powder to the above solution, continue to stir for 30 minutes, ultrasonicate for 30 minutes, then move the m...
Embodiment 2
[0024] 3.92g Bi(NO 3 ) 3 ·5H 2 O dissolved in 30 mL of 5.0 M CH 3 COOH aqueous solution, to obtain solution a; 1.33gNa 2 WO 4 2H 2 O was dissolved in 48mL deionized water to obtain solution b; at room temperature, solution b was added dropwise to solution a, and after stirring for 60 minutes, the pH value was adjusted to 7 with ammonia water, and then the mixed solution was moved to a 120mL reaction kettle. Reacted at 200°C for 22h, cooled to room temperature to obtain a precipitate, which was washed repeatedly with deionized water and absolute ethanol, and dried at 60°C to obtain pure Bi 2 WO 6 Nanosheet photocatalysts.
[0025] From figure 2 It can be seen from above that Zn 2 SnO 4 / Bi 2 WO 6 Nanosheets and pure Bi 2 WO 6 Both nanosheets are responsive to visible light, Zn 2 SnO 4 Responsive in the UV range, and Zn 2 SnO 4 / Bi 2 WO 6 Nanosheets compared to pure Zn 2 SnO 4 and pure Bi 2 WO 6 The nanosheets produced a certain red shift, indicating tha...
Embodiment 3
[0027] (1) 2.5mmol ZnCl 2 and 1.25mmol SnCl 4 ·5H 2 O was dissolved in a mixture of 20mL deionized water and 20mL ethanol, and 10mL of 1.0M NaOH solution was added dropwise under stirring, and the stirring was continued for about 15min. Heated at 150°C for 36h to obtain precipitate I, which was washed three times with water and ethanol respectively, and then dried at 60°C to obtain Zn 2 SnO 4 powder.
[0028] (2) Preparation of Zn 2 SnO 4 / Bi 2 WO 6 Nanosheets, the synthesis steps are as follows: 3.92gBi(NO 3 ) 3 ·5H 2 O dissolved in 30 mL of 5.0 M CH 3 COOH aqueous solution, to obtain solution a; 1.33gNa 2 WO 4 2H 2 O was dissolved in 48mL deionized water to obtain solution b; at room temperature, solution b was added dropwise to solution a, after stirring for 60min, the pH value was adjusted to 7 with ammonia water, and 0.141g Zn 2 SnO 4 Add the powder to the above solution, continue to stir for 30 minutes, ultrasonicate for 30 minutes, then move the mixed so...
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