Preparation method and application of tungsten oxide@bismuth tungstate heterojunction piezoelectric catalytic material
A catalytic material, a technology of heterojunction, which is applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc. Low performance, harsh preparation conditions, etc., to achieve the effect of low implementation cost, good product performance, and reliable principle
Pending Publication Date: 2022-01-11
QINGDAO UNIV OF SCI & TECH
View PDF7 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the preparation process steps of the tungsten oxide / bismuth tungstate heterojunction in the above patents are mostly cumbersome and lengthy, the preparation conditions are harsh, and the composite uniformity of the prepared heterojunction is low, so it is difficult to realize large-scale application in actual production and preparation.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0018] The specific process of the preparation method of a tungsten oxide@bismuth tungstate heterojunction piezoelectric catalytic material involved in this embodiment includes the following steps:
[0019](1) Prepare mixed solution: dissolve 4.85g bismuth nitrate pentahydrate in 20mL4mol / L nitric acid aqueous solution to form solution A, dissolve 1.65g sodium tungstate dihydrate powder in 20mL ultrapure water to form solution B, and continuously Under the condition of stirring, solution B was added dropwise to solution A. After the dropwise addition was completed, it was stabilized for 10 minutes, and the pH value was adjusted to 7 with 2 mol / L aqueous sodium hydroxide solution, and the stirring was continued for 1 hour to prepare a mixed solution;
[0020] (2) Preparation of bismuth tungstate nanosheets: transfer the mixed solution to the polytetrafluoroethylene liner of the hydrothermal reaction kettle to make it hydrothermally react under sealed conditions. The volume of th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of piezoelectric catalysis, and relates to a preparation method and application of a tungsten oxide@bismuth tungstate heterojunction piezoelectric catalytic material. The preparation method comprises the steps that a solution B formed by dissolving sodium tungstate dihydrate in ultrapure water is dropwise added into a solution A formed by dissolving bismuth nitrate pentahydrate in a nitric acid aqueous solution to form a mixed solution, the mixed solution is transferred into a hydrothermal reaction kettle to be subjected to a hydrothermal reaction to obtain bismuth tungstate nanosheets, the bismuth tungstate nanosheets are dispersed into a sulfuric acid aqueous solution and transferred into the hydrothermal reaction kettle, the hydrothermal reaction kettle is sealed and then placed in a drying oven to be subjected to heat preservation, and natural cooling is performed to obtain the tungsten oxide@bismuth tungstate heterojunction piezoelectric catalytic material capable of achieving piezoelectric catalytic degradation of methyl orange. According to the constructed homolog tungsten oxide@bismuth tungstate heterojunction piezoelectric catalytic material, the resistance between phase interfaces is reduced, the carrier transmission rate is increased, a sulfuric acid etching method is adopted, tungsten oxide is generated on the surface of bismuth tungstate in situ, and the stability and uniformity of the heterojunction piezoelectric catalytic material are improved.
Description
Technical field: [0001] The invention belongs to the technical field of piezoelectric catalysis, and specifically relates to a preparation method and application of a tungsten oxide@bismuth tungstate heterojunction piezoelectric catalytic material, in which tungsten oxide is generated in situ on the surface of bismuth tungstate nanosheets by sulfuric acid etching. Background technique: [0002] Dye wastewater is one of the most difficult pollutants to treat. It has high toxicity and poor biodegradability. If it is discharged directly without treatment, it will seriously endanger the ecological environment and human health. In recent years, efficient, green, and sustainable new degradation technologies have received continuous attention, especially advanced oxidation technologies related to catalysis, including photocatalysis, electrocatalysis, piezoelectric catalysis, etc.: photocatalysis utilization Light excites electrons and holes generated by compound semiconductors to i...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J37/10C02F1/36
CPCB01J23/31B01J23/002B01J37/10C02F1/36C02F2101/308B01J35/23
Inventor 刘代明王飞
Owner QINGDAO UNIV OF SCI & TECH