Sodium bismuth titanate/graphite phase carbon nitride heterojunction piezoelectric photocatalyst and preparation method thereof

A graphite phase carbon nitride, sodium bismuth titanate technology, applied in catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Photocatalyst preparation is complicated and other problems, to achieve the effect of low cost, excellent photocatalytic performance, and improved specific surface area

Inactive Publication Date: 2021-08-03
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the preparation of existing heterojunction photocatalysts is relatively complicated, the cost is high, and the g-C cannot be fully and maximized. 3 N 4 The catalytic activity of the problem, and provide a bismuth sodium titanate / graphite phase carbon nitride heterojunction piezoelectric photocatalyst and its preparation method

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sodium bismuth titanate/graphite phase carbon nitride heterojunction piezoelectric photocatalyst and preparation method thereof
  • Sodium bismuth titanate/graphite phase carbon nitride heterojunction piezoelectric photocatalyst and preparation method thereof
  • Sodium bismuth titanate/graphite phase carbon nitride heterojunction piezoelectric photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of sodium bismuth titanate / graphite phase carbon nitride heterojunction piezoelectric photocatalyst, comprising the following steps:

[0048] Step 1, synthesis of NBT nanoparticles:

[0049] 5.6ml of tetra-n-butyl titanate, 3.88g of bismuth nitrate pentahydrate and 14.4g of sodium hydroxide were dispersed in 80ml of deionized water, and stirred at room temperature for 2 hours to obtain a mixed solution. Use a measuring cylinder to measure 60ml of the obtained mixed solution, pour it into a 100ml Teflon lining, put the lining into the matching stainless steel outer lining, place the whole in a well-type furnace, and raise the temperature to 160°C and keep at this temperature for 24h. Pour the final solution and the precipitate into a centrifuge tube, wash with deionized and absolute ethanol three times, centrifuge at 10000r / min for 5min, pour off the unreacted precursor solution, and place the precipitate in an oven Dry at 80°C for 12h to obtain NB...

Embodiment 2

[0060] A preparation method of sodium bismuth titanate / graphite phase carbon nitride heterojunction piezoelectric photocatalyst, comprising the following steps:

[0061] Step 1, synthesis of NBT nanoparticles:

[0062] 5.6ml of tetra-n-butyl titanate, 3.88g of bismuth nitrate pentahydrate and 14.4g of sodium hydroxide were dispersed in 80ml of deionized water, and stirred at room temperature for 2 hours to obtain a mixed solution. Use a measuring cylinder to measure 60ml of the obtained mixed solution, pour it into a 100ml Teflon lining, put the lining into the matching stainless steel outer lining, place the whole in a well-type furnace, and raise the temperature to 180°C and keep at this temperature for 18h. Pour the final solution and the precipitate into a centrifuge tube, wash with deionized and absolute ethanol three times, centrifuge at 10000r / min for 5min, pour off the unreacted precursor solution, and place the precipitate in an oven Dry at 80°C for 12h to obtain NB...

Embodiment 3

[0068] A preparation method of sodium bismuth titanate / graphite phase carbon nitride heterojunction piezoelectric photocatalyst, comprising the following steps:

[0069] Step 1, synthesis of NBT nanoparticles:

[0070] 5.6ml of tetra-n-butyl titanate, 3.88g of bismuth nitrate pentahydrate and 14.4g of sodium hydroxide were dispersed in 80ml of deionized water, and stirred at room temperature for 2 hours to obtain a mixed solution. Use a measuring cylinder to measure 60ml of the obtained mixed solution, pour it into a 100ml Teflon lining, put the lining into the matching stainless steel outer lining, place the whole in a well-type furnace, and raise the temperature to 200°C and keep at this temperature for 12h. Pour the final solution and the precipitate into a centrifuge tube, wash with deionized and absolute ethanol three times, centrifuge at 10000r / min for 5min, pour off the unreacted precursor solution, and place the precipitate in an oven Dry at 80°C for 12h to obtain NB...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a sodium bismuth titanate / graphite phase carbon nitride heterojunction piezoelectric photocatalyst and a preparation method thereof, and solves the problems that an existing heterojunction photocatalyst is relatively complex in preparation and relatively high in cost, and the catalytic activity of g-C3N4 cannot be fully improved to the maximum extent. The graphite-phase carbon nitride photocatalyst is synthesized through a one-step thermal polymerization method, sodium bismuth titanate nanoparticles are synthesized through a one-step hydrothermal process, then the NBT / g-C3N4 heterojunction piezoelectric photocatalyst is obtained through simple grinding, mixing and calcination, and g-C3N4 can absorb part of visible light to generate photon-generated carriers. In the stirring process, charges are generated on the surface of the piezoelectric material NBT due to external pressure, and meanwhile, a built-in electric field is formed at the interface of the two materials through piezoelectric polarization to drive photo-induced electrons and holes to move in opposite directions. By controlling the ratio of NBT to g-C3N4, piezoelectric photocatalysts with different photocatalytic properties can be obtained and used for organic dye degradation and hydrogen production.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic energy conversion, and in particular relates to a bismuth sodium titanate / graphite phase carbon nitride heterojunction piezoelectric photocatalyst and a preparation method thereof. Background technique [0002] The energy shortage crisis and environmental pollution caused by global industrialization are two major problems in the 21st century. Photocatalysis is a clean, safe, and sustainable technology that converts endless solar energy into chemical energy. [0003] In the past ten years, graphitic carbon nitride (g-C 3 N 4 ) has attracted widespread attention due to its advantages of absorbing part of visible light, suitable band edge position, high physical and chemical thermal stability, and economical and environmental protection; but compared with theoretical single-synthetic materials, its specific surface area is very low, and there are few reactive sites. The crystallinity leads ...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/18B01J37/08B01J37/10B01J37/00C02F1/30C01B3/04
CPCB01J27/24B01J23/18B01J23/002B01J35/004B01J35/0033B01J35/0013B01J37/082B01J37/10B01J37/0036B01J37/08C02F1/30C01B3/042B01J2523/00C02F2305/10C02F2101/308B01J2523/12B01J2523/47B01J2523/54Y02E60/36
Inventor 王维佳樊慧庆雷林
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap