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Alpha bismuth oxide/bismuth vanadate and preparation method thereof

A technology of bismuth oxide and bismuth vanadate, which is applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as high cost, difficult industrialized production, etc., and achieves low production cost, easy ratio control, The effect of improving the decolorization rate

Inactive Publication Date: 2018-05-01
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the complexity of the existing technology leads to high cost and is not easy to realize industrial production

Method used

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  • Alpha bismuth oxide/bismuth vanadate and preparation method thereof
  • Alpha bismuth oxide/bismuth vanadate and preparation method thereof
  • Alpha bismuth oxide/bismuth vanadate and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] Add a certain amount of bismuth oxychloride powder into deionized water and ultrasonically disperse, then add sodium hydroxide solution to the above system, wherein the molar ratio of bismuth oxychloride to sodium hydroxide is 1:4, and use ethanol and deionized The ion water was washed repeatedly for 3 times, and the alpha 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 bismuth oxychloride powder with the obtained bismuth vanadate, add deionized water and ultrasonically disperse, then add sodium hydroxide solution to the above system, wherein the molar ratio of bismuth vanadate to bismuth oxychloride is 1:0.25 , the molar ratio of bismuth ...

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Abstract

The invention discloses alpha bismuth oxide / bismuth vanadate and a preparation method thereof. The preparation method provided by the invention comprises the following steps that firstly adding bismuth nitrate into nitric acid; adding ammonium metavanadate into a sodium hydroxide solution; mixing the two solutions for regulating and controlling the pH values; then, performing drying, grinding androasting to obtain bismuth vanadate; mixing the obtained bismuth vanadate powder with the bismuth oxychloride powder; performing dispersion; then, adding a sodium hydroxide solution; performing stirring, washing and drying; then, obtaining the alpha bismuth oxide / bismuth vanadate powder. The sodium hydroxide is used for performing in-situ conversion on the bismuth oxychloride to obtain the alpha bismuth oxide in the alpha bismuth oxide / bismuth vanadate. The method has the advantages that the proportioning ratio between two phases of ingredients can be easily regulated and controlled; the production cost is low; the process method is simple and convenient, and the like.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to an alpha bismuth oxide / bismuth vanadate and a preparation method. Background technique [0002] In recent years, with the rapid development of the global industrialization process, the problem of environmental pollution has become increasingly prominent. Photocatalytic technology has attracted more and more attention because of its advantages of directly using sunlight to solve water pollution. Photocatalyst is the core of this technology. Bismuth alpha oxide and bismuth vanadate can catalyze the decomposition of water and the degradation of organic pollutants under light conditions. However, when used alone, there are problems such as low separation efficiency of photogenerated carriers and poor photocatalytic performance. As a typical preparation case, in Inorg.Chem. (2011, 50, 800–805), the preparation method of bismuth vanadate / bismuth oxide composite material was reported,...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J37/03B01J37/34B01J37/00C02F1/30C02F101/38
CPCC02F1/30B01J23/22B01J37/00B01J37/031B01J37/343C02F2101/38C02F2305/10B01J35/39
Inventor 单连伟
Owner HARBIN UNIV OF SCI & TECH
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