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Preparation method of (040) preferred orientation two-dimensional sheet decahedron-shaped monoclinic phase bismuth vanadate

A technology of monoclinic bismuth vanadate and preferred orientation, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problem of poor photocatalytic performance of monoclinic bismuth vanadate and difficult realization of monoclinic bismuth vanadate The structure directing agent has no problems such as retention, and achieves the effects of improving photocatalytic activity, low cost, and mild reaction conditions

Inactive Publication Date: 2018-05-01
JILIN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the monoclinic phase bismuth vanadate prepared by the existing method is difficult to realize no retention of structure directing agent and has both (040) preferred orientation and special microscopic morphology of two-dimensional sheet-like decahedron, resulting in monoclinic phase vanadium The photocatalytic performance of bismuth acid is poor, and a method for preparing bismuth vanadate with a (040) preferred orientation is provided.

Method used

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  • Preparation method of (040) preferred orientation two-dimensional sheet decahedron-shaped monoclinic phase bismuth vanadate
  • Preparation method of (040) preferred orientation two-dimensional sheet decahedron-shaped monoclinic phase bismuth vanadate
  • Preparation method of (040) preferred orientation two-dimensional sheet decahedron-shaped monoclinic phase bismuth vanadate

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specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method steps of a kind of (040) preferred orientation two-dimensional sheet decahedral monoclinic phase bismuth vanadate of this embodiment are as follows:

[0025] ①. Weigh 48% to 52% of bismuth nitrate pentahydrate and 48% to 52% of sodium orthovanadate dodecahydrate respectively according to molar percentage;

[0026] 2. Take ethylenediaminetetraacetic acid, the mol ratio of the weighed ethylenediaminetetraacetic acid and the sodium orthovanadate dodecahydrate taken in step 1. is (1.1~1.5):1;

[0027] ③, using glycerol and deionized water to prepare a glycerol aqueous solution with a volume fraction of 15% to 45%, which is recorded as solution A;

[0028] 4. Dissolve the bismuth nitrate pentahydrate taken in step 1. in the solution A obtained in step 3. to prepare a bismuth nitrate solution with a concentration of 0.005mol / L to 0.03mol / L, which is designated as solution B;

[0029] 5. Dissolving the sodium orthovanadate dodecah...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step ①, 50% of bismuth nitrate pentahydrate and 50% of sodium orthovanadate dodecahydrate are weighed by molar percentage. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the molar ratio of ethylenediaminetetraacetic acid to sodium orthovanadate dodecahydrate in step ② is (1.2-1.4):1. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method of a (040) preferred orientation two-dimensional sheet decahedron-shaped monoclinic phase bismuth vanadate. According to the method, after vanadium sourcesolution which is obtained by dissolving ethylenediaminetetraacetic acid into sodium vanadate solution is uniformly mixed with the aqueous glycerol solution of bismuth nitrate, the pH value of the reaction system is regulated to 4.5 to 6.5, the obtained precursor solution is then loaded into a hydrothermal reactor to undergo hydrothermal reaction under 150 DEG C to 220 DEG C for 10 to 48 hours, and after cooling, filtration, washing, drying and grinding, the (040) preferred orientation two-dimensional sheet decahedron-shaped monoclinic phase bismuth vanadate is obtained. The sample prepared bythe preparation method is monoclinic phase bismuth vanadate without structure-directing agent remaining, shows a (040) preferred orientation special micromorphology with a two-dimensional sheet decahedron shape, and can help increase photocatalytic activity. The preparation method of a (040) preferred orientation two-dimensional sheet decahedron-shaped monoclinic phase bismuth vanadate disclosedby the invention has the advantages of mild reaction conditions, good repeatability, simple process and low cost, the properties of the obtained catalyst are excellent, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing monoclinic bismuth vanadate, in particular to a method for preparing bismuth bismuth vanadate with (040) preferred orientation. Background technique [0002] Semiconductor photocatalysts have attracted extensive attention due to their ability to utilize solar energy to control environmental pollution and photolyze water to generate hydrogen energy. As a new type of visible light catalyst, bismuth vanadate (BiVO 4 ) Semiconductor photocatalytic materials include monoclinic phase, tetragonal zirconium silicate phase, tetragonal scheelite phase and orthorhombic phase, among which, monoclinic phase BiVO 4 Due to the advantages of non-toxicity, low cost and easy availability, narrow band gap and high photocatalytic activity, it has aroused great interest. However, factors such as poor adsorption performance and easy recombination of photogenerated electron and hole pairs restrict the use of monoclinic BiVO ...

Claims

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Application Information

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IPC IPC(8): C01G31/00B01J23/22B01J35/02
CPCC01G31/00B01J23/002B01J23/22C01P2004/03C01P2002/72C01P2002/82C01P2002/80C01P2002/20B01J35/00B01J35/30B01J35/39
Inventor 赵国升刘伟滕洪辉段小月常立民王梦瑶郑旭辰慕铭党鸿博
Owner JILIN NORMAL UNIV
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