Check patentability & draft patents in minutes with Patsnap Eureka AI!

Regeneration method of nano zinc oxide photocatalyst

A nano-zinc oxide, photocatalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of crystal particle growth and morphology change, affecting recovery Catalytic performance of post-photocatalysts

Inactive Publication Date: 2010-12-08
DALIAN JIAOTONG UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the roasting process will cause the growth of crystal particles and the change of morphology, which will affect the catalytic performance of the recovered photocatalyst.

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
  • Regeneration method of nano zinc oxide photocatalyst
  • Regeneration method of nano zinc oxide photocatalyst
  • Regeneration method of nano zinc oxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Such as Figure 1 ~ Figure 3 shown. A recovery method for nano-zinc oxide photocatalyst, comprising regeneration and decomposition process of nano-zinc oxide catalyst, characterized in that it comprises the following steps:

[0021] 1. Pre-place the negative and positive mixed polishing resin with a volume ratio of 1:1 in the regeneration chamber, use the microporous titanium filter electrode, and turn on the power;

[0022] 2. Pump the suspension solution containing invalid low-concentration nano-zinc oxide from the bottom of the regeneration chamber with a large flow rate and discharge the overflow to keep the liquid level stable; the acid produced in the anode chamber and the lye produced in the cathode chamber are also produced by The constant flow pump discharges in time and replenishes tap water with a conductivity of about 200μs / cm to reduce the temperature of the electrode chamber and control the temperature of the regeneration chamber not to exceed 60°C.

[0...

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 invention relates to a method for recovering nanometer zinc oxide photocatalyst, which is characterized in that the method comprises a photocatalyst regeneration process and a separation process, wherein the method comprises the steps of preplacing a negative mixed polished resin and positive mixed polished resin with the volume ratio of 1:1 in a regeneration chamber, using a microporous titanium filter-element electrode, pumping and injecting a supernatant solution containing failure nanometer zinc oxide from the bottom of the regeneration chamber, discharging overflowing solution, performing electrolysis treatment, controlling the temperature not to exceed 60 DEG C, stopping anodic effluent after regeneration is over, controlling entering water flow and electric field intensity tillforming a three-phase fluidized bed state, floating up and leading out ultrafine particle catalyst after recovery. The method offers a new way for recovering nanometer zinc oxide by adopting a resin bed applied with an electric field to concentrate low-concentration suspended catalyst and incompletely degrade pollutants.

Description

technical field [0001] The invention relates to a recovery method of a photocatalyst, in particular to a recovery method of a nanometer zinc oxide photocatalyst. Background technique [0002] Zinc oxide is one of the most practical photocatalysts and is known as the "third-generation semiconductor material". The source of nano-zinc oxide is plentiful and cheap, and the visible light catalytic process of its composite structure material has strong vitality and broad market prospects in terms of cost and energy consumption. [0003] In the photocatalytic reaction, nano-zinc oxide will cause catalyst poisoning due to factors such as microcrystalline polymerization and carboxyl intermediate product pollution, but the research on recovery and regeneration methods and analysis technology is seriously lagging behind, and it has become the first step for photocatalytic technology to move from the laboratory to practical application. The main obstacle; secondly, the zinc oxide catal...

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 Patents(China)
IPC IPC(8): B01J23/92B01J23/06B01J38/48
Inventor 朱少敏姜玉玲李积媛李彦生
Owner DALIAN JIAOTONG UNIVERSITY
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