Process for preparing visible light responding photo catalytic film layer

[0025] A layer of bismuth vanadate photocatalyst thin film layer is prepared on the glass sheet. A certain amount of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O and EDTA, dissolved in distilled water, and then added to sodium hydrogen phosphate NaH with a concentration of 0.1mol / L 2 PO 4 , Disodium hydrogen phosphate Na 2 HPO 4 buffer solution, as A solution; then sodium vanadate NaVO 3 Added to sodium hydrogen phosphate NaH with a concentration of 0.1mol / L 2 PO 4 , Disodium hydrogen phosphate Na 2 HPO 4 Buffer solution, as B liquid; Control adding speed, B liquid is joined in A liquid, is controlled at bismuth nitrate: ethylenediaminetetraacetic acid: sodium vanadate is 1: 2~3: 2~3 (molar ratio), uses The NaOH aqueous solution with a concentration of 1 mol / L adjusts the pH of the solution to about 7. During the stirring process, the aqueous solution is heated to obtain a clear solution with a certain concentration, which is used as liquid C. Then put the glass piece that ...

[0031] Preparation of bismuth vanadate photocatalyst film layer doped with rare earth or metal ions. A certain amount of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, cerium nitrate Ce(NO 3 ) 3 ·6H 2 O and EDTA, first dissolve EDTA in distilled water, then add Bi(NO 3 ) 3 ·5H 2 O, cerium nitrate Ce(NO 3 ) 3 ·6H 2 O, followed by adding sodium hydrogen phosphate NaH with a concentration of 0.1mol / L 2 PO 4 , Disodium hydrogen phosphate Na 2 HPO 4 buffer solution, as A solution; then sodium vanadate NaVO 3 Added to sodium hydrogen phosphate NaH with a concentration of 0.1mol / L 2 PO 4 , Disodium hydrogen phosphate Na 2 HPO 4 Buffer solution, as B liquid; control adding speed, B liquid is joined in A liquid, control in (bismuth nitrate+cerium nitrate): citric acid: sodium vanadate is 1: 1.5~3: 1.5~3, with the concentration of 1 mol / L NaOH aqueous solution to adjust the pH of the solution to about 6.5-8. During the stirring process, the aqueous solution is heated to obtain...

[0035] Preparation of nano zinc oxide coated with bismuth vanadate photocatalyst thin film layer. The preparation of solution is as embodiment 1, promptly takes a certain amount of bismuth nitrate Bi (NO 3 ) 3 ·5H 2 O and EDTA, dissolved in distilled water, and then added to sodium hydrogen phosphate NaH with a concentration of 0.1mol / L 2 PO 4 , Disodium hydrogen phosphate Na 2 HPO 4 buffer solution, as A solution; then sodium vanadate NaVO 3 Added to sodium hydrogen phosphate NaH with a concentration of 0.1mol / L 2 PO4 , Disodium hydrogen phosphate Na 2 HPO 4 Buffer solution, as B liquid; Control adding speed, B liquid is joined in A liquid, control in bismuth nitrate: ethylenediaminetetraacetic acid: sodium vanadate is 1: 2~3: 2~3, and concentration is 1mol / 1 L of NaOH aqueous solution to adjust the pH of the solution to about 7. Then add a certain amount of zinc oxide powder with an average particle size of 60 nanometers into the solution, place it in an ultrasoni...