Bismuth vanadate/bismuth oxide and preparation method
A technology of bismuth vanadate and bismuth oxide, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of difficult large-scale industrial production, high preparation cost, complex preparation technology, etc. The effect of improving the effective contact area, low production cost and simple process method
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Embodiment 1
[0020] Add a certain amount of bismuth oxybromide powder into deionized water and ultrasonically disperse, then add sodium hydroxide solution to the above system, wherein the molar ratio of bismuth oxybromide to sodium hydroxide is 1:4, and use ethanol and deionized The ion water was washed repeatedly for 3 times, and bismuth oxide was obtained after drying.
Embodiment 2
[0022] Step 1, add a certain amount of citric acid to 2 mol / L nitric acid, then add a certain amount of Bi(NO 3 ) 3 ·5H 2 O, stirred until uniform, where Bi(NO 3 ) 3 ·5H 2 The molar ratio of O and citric acid is 1:2, and the pH value is adjusted to 7 with ammonia water;
[0023] Step 2, a certain amount of NH 4 VO 3 Dissolve in sodium hydroxide solution, add the solution obtained in step 1 to the above solution, and adjust the pH value to 7 with ammonia water;
[0024] In step 3, the solution obtained in step 2 was first placed in a water bath at 80°C, and then dried at 135°C for 5 hours, and the powder obtained after grinding was calcined at 500°C for 4 hours to obtain bismuth vanadate.
Embodiment 3
[0026] Step 1, add a certain amount of citric acid to 2 mol / L nitric acid, then add a certain amount of Bi(NO 3 ) 3 ·5H 2 O, stirred until uniform, where Bi(NO 3 ) 3 ·5H 2 The molar ratio of O and citric acid is 1:2, and the pH value is adjusted to 7 with ammonia water;
[0027] Step 2, a certain amount of NH 4 VO 3 Dissolve in sodium hydroxide solution, add the solution obtained in step 1 to the above solution, and adjust the pH value to 7 with ammonia water;
[0028] Step 3, the solution obtained in step 2 is first placed in a water bath at 80°C, then dried at 135°C for 5 hours, and the powder obtained after grinding is calcined at 500°C for 4 hours to obtain bismuth vanadate;
[0029] Step 5, mix the bismuth oxybromide powder with the obtained bismuth vanadate, add deionized water and ultrasonically disperse, then add the sodium hydroxide solution to the above system, wherein the molar ratio of bismuth vanadate to bismuth oxybromide is 1:0.30 , the molar ratio of bi...
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