A kind of photocatalyst with ternary heterojunction structure and its preparation method and application
A photocatalyst, -bi2o3 technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low separation efficiency and bismuth oxide photodegradation pollutants low efficiency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0038] The present invention also provides a method for preparing the photocatalyst described in the above technical solution, comprising the following steps:
[0039] α-Bi 2 o 3 Mixing with titanium source solution, aging to obtain photocatalyst precursor;
[0040] The photocatalyst precursor is dried and calcined in sequence to obtain a photocatalyst.
[0041] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.
[0042] In the present invention, α-Bi 2 o 3 It is mixed with titanium source solution and aged to obtain a photocatalyst precursor.
[0043] In the present invention, the α-Bi 2 o 3 The preparation method preferably comprises the following steps: mixing bismuth nitrate and nitric acid solution to obtain a mixed solution; mixing the mixed solution with sodium hydroxide solution, followed by liquid phase precipitation and roasting to obtain α-Bi 2 o 3 . ...
Embodiment 1
[0071] Mix 10 g of bismuth nitrate pentahydrate with 100 mL of dilute nitric acid with a concentration of 1 mol / L to obtain a mixed solution;
[0072] The mixed solution was slowly added dropwise to 200 mL of 3 mol / L sodium hydroxide solution at a rate of 1 drop / s, and reacted at 60°C for 3 hours. The precipitate was first washed three times with deionized water, and then without Washed twice with water and ethanol, and then dried at 60 °C to prepare α-Bi 2 o 3 ;
[0073] At a temperature of 600°C, the α-Bi 2 o 3 Calcined for 4 hours to obtain α-Bi with high crystallinity 2 o 3 ;
[0074] Mix 0.298mL tetra-n-butyl titanate with 2mL of a mixed solvent of ethylene glycol and ethanol (the volume ratio of ethylene glycol and ethanol is 3:1) to obtain a tetrabutyl titanate solution;
[0075] 1gα-Bi 2 o 3 Mix with 0.298mL tetrabutyl titanate solution, and age at room temperature for 24h to obtain a photocatalyst precursor;
[0076] The photocatalyst precursor was dried at ...
Embodiment 2
[0078] Mix 10g bismuth nitrate pentahydrate with 100mL concentration of 1mol / L dilute nitric acid to obtain a mixed solution,
[0079] The mixed solution was slowly added dropwise to 200mL sodium hydroxide solution with a concentration of 3mol / L at a rate of 1 drop / s, and reacted for 3h at 75°C. The precipitate was first washed three times with deionized water, and then Washed twice with absolute ethanol, and then dried at 60°C to prepare α-Bi 2 o 3 ;
[0080] At a temperature of 550°C, the α-Bi 2 o 3 Calcined for 2 hours to obtain α-Bi with high crystallinity 2 o 3 ;
[0081] Mix 0.108mL titanium isopropoxide and 2mL ethylene glycol to obtain titanium isopropoxide solution;
[0082] 1gα-Bi 2 o 3 Mix with 0.128mL titanium isopropoxide solution, and age at room temperature for 24 hours to obtain a photocatalyst precursor;
[0083] The photocatalyst precursor was dried at 75°C, and then calcined at 450°C for 3 hours to obtain Bi 4 Ti 3 o 12 / Bi 12 TiO 20 / α-Bi 2 ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More