Supercharge Your Innovation With Domain-Expert AI Agents!

Microemulsion-like photocatalyst, preparation method and applications thereof

A photocatalyst and microemulsion technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to improve wettability, reduce van der Waals force attraction, and improve electrostatic repulsion energy.

Active Publication Date: 2015-02-25
TAIYUAN UNIV OF TECH
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the research on BiOBr photocatalysts mainly focuses on the development of powder and the development of immobilization technology, but there is no report on the microemulsion BiOBr photocatalyst with high dispersion performance.

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
  • Microemulsion-like photocatalyst, preparation method and applications thereof
  • Microemulsion-like photocatalyst, preparation method and applications thereof
  • Microemulsion-like photocatalyst, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: utilize hydrolysis method to prepare microemulsion BiOBr photocatalyst

[0028] The specific steps are:

[0029] 1) Weigh 0.2 mmol of BiBr 3 The powder was placed in 5 mL distilled water at room temperature, stirred and dissolved at room temperature for 3 h to form solution A-1;

[0030] 2) Measure 2 mL of 0.1 mol / L hydrobromic acid solution and record it as solution B-1;

[0031] 3) Add solution B-1 dropwise to solution A-1 gradually, keep the drop rate at 1.5 mL / min, stir fully for 40 min after the titration is completed, and add 27wt% concentrated ammonia water dropwise, adjust the pH value to 8, so that After fully reacting the two for 1 h, solution C-1 was obtained;

[0032] 4) Weigh 0.0047 mmol of sodium hexametaphosphate, add it to the above solution C-1, and then thoroughly mix and oscillate with ultrasonic waves for 1 h to obtain a microemulsion BiOBr photocatalyst, which is designated as BiOBr-1.

[0033] The above obtained microemulsion ca...

Embodiment 2

[0034] Embodiment 2: utilize hydrolysis and alcoholysis method to prepare microemulsion BiOBr photocatalyst

[0035] The specific steps are:

[0036] 1) Weigh 0.4 mmol of Bi(NO 3 ) 3 ·5H 2O powder was placed in a mixed solvent composed of 5 mL water and 5 mL ethanol at room temperature, stirred and dissolved at room temperature for 4 h to form solution A-2;

[0037] 2) Measure 4 mL of 0.1 mol / L hydrobromic acid solution and record it as solution B-2;

[0038] 3) Add solution B-2 dropwise to solution A-2 gradually, keep the dropping rate at 1.5 mL / min, stir fully for 40 min after the titration is completed, and add 27wt% concentrated ammonia water dropwise, adjust the pH value to 9, so that After the two fully reacted for 2 h, the solution C-2 was obtained;

[0039] 4) Weigh 0.0094 mmol of sodium hexametaphosphate, add it to the above solution C-2, and then thoroughly mix and oscillate with ultrasonic waves for 2 h to obtain a microemulsion BiOBr photocatalyst, which is ...

Embodiment 3

[0041] Embodiment 3: utilize alcoholysis method to prepare microemulsion BiOBr photocatalyst

[0042] The specific steps are:

[0043] 1) Weigh 0.5 mmol of Bi 2 O 3 The powder was placed in 10 mL of ethanol at room temperature, stirred and dissolved at room temperature for 2 h to form solution A-3;

[0044] 2) Measure 10 mL of 0.1 mol / L hydrobromic acid solution and record it as solution B-3;

[0045] 3) Add solution B-3 dropwise to solution A-3 gradually, keep the drop rate at 1.5 mL / min, stir fully for 40 min after the titration is completed, and add 27wt% concentrated ammonia water dropwise, adjust the pH value to 7, so that After the two fully reacted for 2 h, the solution C-3 was obtained;

[0046] 4) Weigh 0.0098 mmol of sodium hexametaphosphate, add it to the above solution C-3, and then thoroughly mix and oscillate with ultrasonic waves for 2 h to obtain a microemulsion BiOBr photocatalyst, which is designated as BiOBr-3.

[0047] The above obtained microemulsio...

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

No PUM Login to View More

Abstract

The present invention discloses a microemulsion-like BiOBr photocatalyst, wherein any one selected from BiBr3, Bi(NO3)3.5H2O and Bi2O3 is adopted as a bismuth source, hydrobromic acid is adopted as a bromine source, water or ethanol is adopted as a solvent, ammonia water is adopted as a pH value adjusting agent, sodium metaphosphate is adopted as a dispersant, and a simple hydrolysis or alcoholysis method is adopted to prepare the microemulsion-like BiOBr photocatalyst at a room temperature. The present invention further discloses a preparation method and applications of the microemulsion-like BiOBr photocatalyst. Compared with the existing BiOBr powder photocatalyst, the microemulsion-like BiOBr photocatalyst has the following characteristics that: the microemulsion-like BiOBr photocatalyst exists in the emulsion form in the photocatalytic treatment system, and has good dispersity, good repeatability and excellent photocatalytic property, the defects of easy agglomeration and poor dispersion of the powder catalyst, and the problem of complex process and activity reducing of the film catalyst are effectively avoided, and the large specific surface area of the catalyst is ensured.

Description

technical field [0001] The invention relates to a microemulsion photocatalyst, specifically a microemulsion BiOBr photocatalyst, its preparation method and its application in treating organic pollutants, and belongs to the technical field of inorganic environmental protection synthesis photocatalyst. Background technique [0002] In recent years, with the rapid development of modern industry (especially the dye industry), problems such as dye wastewater pollution and discharge have intensified. Among them, dye organic pollutants are difficult to be oxidized by common oxidants or degraded by microorganisms, causing serious pollution of water, soil and ecological environment. Finding a fast, economical and effective method to solve dye wastewater is an issue that must be faced in my country to achieve sustainable development and the healthy survival of the whole people. [0003] Heterogeneous photocatalytic oxidation technology can use renewable and clean solar energy to trea...

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
IPC IPC(8): B01J27/06B01J35/12A62D3/17A62D3/176A62D101/28
Inventor 张小超李瑞张继龙易群鲁冰倩
Owner TAIYUAN UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com