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Preparation method of adsorption type piezoelectric photocatalytic composite fiber material

A composite fiber and piezoelectric fiber technology, which is applied in catalyst activation/preparation, chemical instruments and methods, water treatment of special compounds, etc., can solve the problems of poor adsorption performance and high carrier recombination efficiency

Active Publication Date: 2021-09-14
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing an adsorption piezoelectric photocatalytic composite fiber material, which solves the problems of poor adsorption performance and high carrier recombination efficiency in existing photocatalytic materials

Method used

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  • Preparation method of adsorption type piezoelectric photocatalytic composite fiber material

Examples

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Embodiment 1

[0059] 7.56g melamine (C 3 N 6 h 6 ) and 7.42g boric acid (H 3 BO 3 ) were dissolved in 500 mL distilled water and mixed to form a uniform precursor solution. Heat and stir the precursor solution in a water bath at 95°C for 4 hours until the solution becomes transparent, insert the ultrasonic probe of the cell pulverizer into the solution, adjust the ultrasonic power to 100W, and ultrasonic frequency to 40KHz for 2 hours, and naturally After cooling, place it in an oven at 90°C for 4 hours, then place it in a tube furnace, select a sintering temperature of 1100°C under a nitrogen atmosphere, a heating rate of 5°C / min, and a sintering time of 8 hours for calcination to obtain white BN fiber; secondly, the obtained white BN fiber is added into isopropanol to form a mixed solution, and then the mixed solution is placed in an ultrasonic probe of a cell pulverizer at an ultrasonic power of 100W and an ultrasonic frequency of 40KHz for 48h, and finally filtered, in Dry in an ov...

Embodiment 2

[0065] 5.154g melamine (C 3 N 6 h 6 ) and 5.051g boric acid (H 3 BO 3 ) were dissolved in 500 mL distilled water and mixed to form a uniform precursor solution. Heat and stir the precursor solution in a water bath at 90°C for 4 hours until the solution becomes transparent, insert the ultrasonic probe of the cell pulverizer into the solution, adjust the ultrasonic power to 100W, and ultrasonic frequency to 40KHz for 2 hours, and naturally After cooling, place it in an oven at 85°C for 4 hours, then place it in a tube furnace, select a sintering temperature of 1200°C under a nitrogen atmosphere, and a heating rate of 5°C / min; sintering time of 7 hours for calcination to obtain white BN fiber; secondly, the obtained white BN fiber is added into isopropanol to form a mixed solution, and then the mixed solution is placed in an ultrasonic probe of a cell pulverizer at an ultrasonic power of 100W and an ultrasonic frequency of 40KHz for 48h, and finally filtered, in Dry in an ov...

Embodiment 3

[0071] 2.551g melamine (C 3 N 6 h 6 ) and 2.5g boric acid (H 3 BO 3 ) were dissolved in 500 mL deionized water and mixed to form a uniform precursor solution. Heat and stir the precursor solution in a water bath at 85°C for 4.5h until the solution becomes transparent, insert the ultrasonic probe of the cell pulverizer into the solution, adjust the ultrasonic power to 200W, and ultrasonic frequency to 40KHz for 1.5h. After being cooled naturally under natural conditions, it was dried in an oven at 80°C for 5 hours, and then placed in a tube furnace. Under a nitrogen atmosphere, the sintering temperature was selected to be 1300°C, and the heating rate was 5°C / min; the sintering time was 6 hours for calcination to obtain White BN fiber; secondly, add the obtained white BN fiber into isopropanol to form a mixed solution, then place the mixed solution in the ultrasonic probe of a cell pulverizer, ultrasonicate for 48 hours at an ultrasonic power of 200W, and an ultrasonic frequ...

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Abstract

The invention discloses a preparation method of an adsorption type piezoelectric photocatalytic composite fiber material. The preparation method specifically comprises the following steps: 1, preparing BN nano short fibers; 2, preparing a BN / BNBT piezoelectric fiber membrane precursor based on the product obtained in the step 1; 3, performing multi-atmosphere step-by-step calcination on the product obtained in the step 2 to obtain a BN / BNBT piezoelectric fiber membrane; 4, preparing a BN / BNBT / Ag piezoelectric photocatalytic composite fiber membrane based on the product obtained in the step 3; and 5, carrying out secondary calcination treatment on the product obtained in the step 4 to obtain the product. According to the invention, the problems that an existing photocatalytic material is poor in adsorption performance and high in carrier recombination efficiency are solved.

Description

technical field [0001] The invention belongs to the technical field of composite nanofiber preparation, and relates to a method for preparing an adsorption piezoelectric photocatalytic composite fiber material. Background technique [0002] At present, most photocatalytic materials have poor adsorption performance and high recombination rate of photogenerated carriers, resulting in low photocatalytic efficiency. Various methods are used to improve the adsorption performance of the material and reduce the recombination rate of carriers to improve its photocatalytic efficiency. Catalytic performance has become a research hotspot. Therefore, it is urgent to prepare a high-adsorption piezoelectric photocatalytic composite fiber material to solve the above problems. [0003] In these studies, bismuth sodium titanate-barium titanate (BNBT), as an A-site complex perovskite structure inorganic non-metallic semiconductor material, has been favored due to its advantages of lead-free, ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/50B01J23/18B01J35/06B01J37/08B01J37/18B01J37/34C02F1/32
CPCB01J27/24B01J23/50B01J23/18B01J23/002B01J37/082B01J37/343B01J37/345B01J37/18B01J37/342C02F1/32C02F2305/10C02F2101/308B01J2523/00B01J35/399B01J35/393B01J35/23B01J35/33B01J35/59B01J35/39B01J2523/12B01J2523/25B01J2523/47B01J2523/53Y02W10/37
Inventor 汤玉斐康玲刘照伟赵康郑婉星齐敏
Owner XIAN UNIV OF TECH
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