Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of metastable phase bismuth oxide and application thereof in photocatalytic degradation of organic pollutants

A bismuth oxide, metastable phase technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. The effect of high specific surface

Active Publication Date: 2017-08-11
CENT SOUTH UNIV
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (CN105271405A) discloses a material based on bismuth oxycarbonate or bismuth oxide nanotubes and its preparation method, using bismuth nitrate pentahydrate as raw material, containing CO 2 Atmospheric or without CO 2 Bismuth oxycarbonate or bismuth oxide nanotubes can be obtained by stirring in the atmosphere, which can be used for photocatalytic adsorption and degradation of organic pollutants, etc., but the preparation process is complicated and the cost is high

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
  • Preparation method of metastable phase bismuth oxide and application thereof in photocatalytic degradation of organic pollutants
  • Preparation method of metastable phase bismuth oxide and application thereof in photocatalytic degradation of organic pollutants
  • Preparation method of metastable phase bismuth oxide and application thereof in photocatalytic degradation of organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 (control experiment group)

[0040] 1. Weigh 113.04mg of ammonium bismuth citrate and 9mg of urea into 25ml of water, stir well at room temperature until completely dissolved into a white solution;

[0041] 2. Weigh 72.89mg of cetyltrimethylammonium bromide (CTAB) and add it to the above solution;

[0042] 3. Adjust the pH to 7, then stir for 30 minutes, transfer to a polytetrafluoroethylene liner, keep it in a stainless steel reactor at 180°C for 18 hours, and cool it down to room temperature naturally after the reaction;

[0043] 4. Collect the above reaction products, centrifuge them three times with water and alcohol at a speed of 13,000 rpm, dry them at 60°C, label sample 1, and save them for subsequent testing.

[0044] The final product was identified as bismuth oxycarbonate by X-ray diffraction, but due to the low content of urea, the morphology of bismuth oxycarbonate was shown as nano flakes and did not self-assemble into microflowers. (See Figu...

Embodiment 2

[0046] 1. Weigh 113.04mg of ammonium bismuth citrate and 15mg of urea into 25ml of water, stir well at room temperature until completely dissolved into a white solution;

[0047] 2. Weigh 72.89mg of cetyltrimethylammonium bromide (CTAB) and add it to the above solution;

[0048] 3. Adjust the pH to 7, then stir for 30 minutes, transfer to a polytetrafluoroethylene liner, keep it in a stainless steel reactor at 180°C for 18 hours, and cool it down to room temperature naturally after the reaction;

[0049] 4. Collect the above reaction products, centrifuge them three times with water and alcohol at a speed of 13,000 rpm, dry them at 60°C, label sample 2, and save them for subsequent testing.

[0050] The visible light degradation performance test of the prepared bismuth oxycarbonate microflowers is as follows: add 10 mg of sample and 15 mL of rhodamine B solution (10 mg / L) to the reactor, stir in dark field for 60 min to reach adsorption equilibrium, and then irradiate with a vi...

Embodiment 3

[0052] Embodiment 3 (control experiment group)

[0053] The preparation method of bismuth oxycarbonate micron flower of the present invention, comprises the following steps:

[0054] 1. Weigh 113.04mg of ammonium bismuth citrate and 45mg of urea into 25ml of water, stir well at room temperature until completely dissolved into a white solution;

[0055] 2. Weigh 72.89mg of cetyltrimethylammonium bromide (CTAB) and add it to the above solution;

[0056] 3. Adjust the pH to 7, then stir for 30 minutes, transfer to a polytetrafluoroethylene liner, keep it in a stainless steel reactor at 180°C for 18 hours, and cool it down to room temperature naturally after the reaction;

[0057] 4. Collect the above reaction products, centrifuge them three times with water and alcohol at a speed of 13,000 rpm, dry them at 60°C, label sample 3, and save them for subsequent testing.

[0058] X-ray diffraction identified the final product as bismuth oxycarbonate, and its morphology also showed 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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of metastable phase bismuth oxide and application thereof in photocatalytic degradation of organic pollutants. The preparation method comprises the following steps: carrying out hydrothermal reaction on an aqueous solution which contains ammonium bismuth citrate, urea and hexadecyl trimethyl ammonium bromide to obtain bismuthyl carbonate microflowers; and calcining the bismuthyl carbonate microflowers in an air environment to obtain the metastable phase bismuth oxide beta-Bi2O3 / Bi2O2.33@Bi2O2CO3. The preparation method is simple and controllable to operate, and is environmentally friendly. The synthesized metastable phase bismuth oxide has the advantages of visible-light response, large specific surface area, high catalytic activity and the like, has the characteristics of rapidness and high efficiency in a process of visible-light catalytic degradation of the organic pollutants, and can be widely applied to the technical field of treatment of the organic pollutants.

Description

technical field [0001] The present invention relates to a preparation method of bismuth oxide photocatalyst, in particular to a method for synthesizing metastable phase bismuth oxide by self-sacrifice of bismuth oxycarbonate microflowers, and the use of metastable phase bismuth oxide in photocatalytic degradation of organic pollutants The application belongs to the technical field of nanometer photocatalytic materials. Background technique [0002] With the development of industry and heavy industry, environmental pollution is becoming increasingly serious, especially the problem of wastewater treatment. Due to the characteristics of complex components, high toxicity, strong corrosiveness, and difficult treatment of chemical water pollution, traditional treatment methods such as sedimentation, filtration, and adsorption can no longer meet the treatment needs. It is imminent to find efficient and stable water pollution treatment methods. [0003] Since Professor Fujishima an...

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): B01J27/232B01J35/10C02F1/30
CPCC02F1/30B01J27/232C02F2305/10B01J35/613B01J35/39Y02W10/37
Inventor 潘军边渊马永进刘一
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com