Zinc ferrite/bismuth tungstate composite catalyst as well as preparation method and application thereof in waste gas treatment
A composite catalyst, bismuth tungstate technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of easy and rapid recombination of photogenerated electrons and holes , to achieve the effects of low cost of raw materials, increased survival life, and simple preparation process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0041] ZnFe 2 o 4 Preparation of nanofibers: First, 1 mmol of Zn(NO 3 ) 2 ·6H 2 O and 2 mmol of Fe(NO 3 ) 3 9H 2 O was dissolved in 10 mL of DMF solution, and after stirring at room temperature for 1 hour, 2 g of PVP was added, and magnetic stirring was continued for 12 hours to obtain a brown-red homogeneous precursor solution, which was the spinning solution; then, the spinning solution was transferred to into a 5 mL plastic syringe equipped with a steel needle with a diameter of 0.5 mm for electrospinning (voltage: 15 kV, injection rate: 0.2 mm min -1 ) to obtain nanofibers; finally, the obtained nanofibers were calcined in air at 600 °C for 2 hours with a heating rate of 1 °C min -1 (room temperature to 600 °C), resulting in ZnFe 2 o 4 Nanofibers.
[0042] In order to observe the morphology of the material, the products prepared in this embodiment were characterized by scanning electron microscope and transmission electron microscope, with figure 1 It is the ZnF...
Embodiment 2
[0044] ZnFe 2 o 4 / Bi 2 WO 6 Preparation of composite materials: First, 240 mg of Bi(NO 3 ) 3 ·5H 2 O and 80 mg of Na 2 MoO 4 2H 2 O was ultrasonically dissolved in 5 mL of ethylene glycol; then, 30 mL of ethanol was slowly added to the above mixed solvent; then the prepared ZnFe 2 o 4 Nanofibers (Example 1) were mixed and transferred to a reactor and heated to 160 °C for 24 h; then naturally cooled to room temperature, the resulting solid product was washed with deionized water and ethanol repeatedly for 3 times, and then placed in a 60 °C drying in an oven to obtain ZnFe 2 o 4 / Bi 2 WO 6 (Simply marked as ZFO / BWO) composite material, which is a zinc ferrite / bismuth tungstate composite catalyst. According to the added ZnFe 2 o 4 Depending on the quality, ZnFe can be obtained 2 o 4 ZnFe with different content 2 o 4 / Bi 2 WO 6 Composite materials including 15% ZFO / BWO, 20% ZFO / BWO, 30% ZFO / BWO, where 20% ZFO / BWO represents ZnFe 2 o 4 The addition of nano...
Embodiment 3
[0047] Flower-shaped Bi 2 WO 6 Preparation of materials: First, 240 mg of Bi(NO 3 ) 3 ·5H 2 O and 80 mg of Na 2 MoO 4 2H 2 O was sonicated in 5 mL of ethylene glycol. Then, 30 mL of ethanol was slowly added to the above mixed solvent. Finally, the solution obtained above was transferred to a reactor and heated to 160 °C for 24 h. When the belt system was naturally cooled to room temperature, the obtained solid product was washed with deionized water and ethanol three times successively, and dried in an oven at 60°C to obtain a flower-like Bi 2 WO 6 Material, yield 160 mg.
[0048] In order to observe the morphology of the material, the product prepared in this embodiment was characterized by scanning electron microscopy, with Figure 4 It is the flower-like Bi prepared in this embodiment 2 WO 6 The scanning electron microscope image of the catalyst, (a) shows the flower-like Bi prepared in this example 2 WO 6 catalyst.
[0049] Based on the above, from the atta...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More