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

Method for immobilizing photocatalyst on flexible fiber substrate

A photocatalyst and flexible fiber technology, applied in the field of photocatalysis, can solve the problems of reducing the opportunity for the reuse of supported photocatalysts, unfavorable photocatalytic reactions, limited application scope, etc. Avoid high running costs

Active Publication Date: 2020-12-22
XI AN JIAOTONG UNIV
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On this basis, the catalyst is connected to the carrier with a binder, which effectively improves the problem of catalyst shedding. Most of the commonly used binders are one or more organic substances, but most of the organic substances will age under long-term light, reducing the Opportunities for the reuse of loaded photocatalysts and organic binders usually have a strong absorption capacity for light, which is not conducive to photocatalytic reactions, and its application range is relatively limited

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
  • Method for immobilizing photocatalyst on flexible fiber substrate
  • Method for immobilizing photocatalyst on flexible fiber substrate
  • Method for immobilizing photocatalyst on flexible fiber substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Add 40mg of CZS photocatalyst and 40mg of silicon dioxide powder with a diameter of 300nm into 5mL of deionized water, disperse evenly by ultrasonic vibration for 30min, prepare a catalyst suspension with a concentration of 8mg / mL, and set aside;

[0046] (2) The flexible carrier material is dust-free paper with water absorption, model 0609 dust-free wiping paper, made of 55% cellulose (native wood pulp) and 45% polyester fiber, and cut it into a size of 5cm*5cm Dimensions, rinsed with deionized water and dried for later use;

[0047] (3) Place the dust-free paper obtained in step (2) flat on the heating platform, and use a pipette gun to take 2.5mL of the catalyst suspension obtained in step (1) and apply it drop by drop on the dust-free paper at a uniform speed. Due to the high-efficiency water absorption of the paper, the liquid droplets will quickly spread to the surrounding area after contacting the dust-free paper, forming a uniformly loaded catalyst liquid fi...

Embodiment 2

[0051] (1) Add 400mg of CZS photocatalyst and 400mg of silicon dioxide powder with a diameter of 300nm into 25mL of deionized water, disperse evenly by ultrasonic vibration for 30min, prepare a catalyst suspension with a concentration of 16mg / mL, and set aside;

[0052] (2) The carrier material is model 0609 dust-free wiping paper, the size is 20cm*20cm, rinsed with deionized water and dried for later use;

[0053] (3) Place a piece of glass parallel to the ground under outdoor sunlight, place the dust-free paper obtained in step (2) on the glass, and take 20 mL of the catalyst suspension obtained in step (1) drop by drop at a constant speed with a pipette gun Drop-coated on dust-free paper, dried under sunlight to prepare the loaded photocatalyst precursor.

[0054] (4) Soak the loaded photocatalyst precursor obtained in step (3) into the configured sodium sulfide / sodium sulfite solution with pH=12 for 5h, then place it on an outdoor wooden board, and dry it under sunlight to...

Embodiment 3

[0057] (1) 80mg TiO 2 (P25) Photocatalyst and 80 mg of silicon dioxide powder with a diameter of 500 nm were added to 10 mL of deionized water, disperse evenly by ultrasonic vibration for 30 min, and prepared into a catalyst suspension with a concentration of 8 mg / mL for later use;

[0058] (2) Use model 0609 dust-free wiping paper as the carrier material, cut it into a size of 5cm*5cm, wash it with deionized water and dry it for later use;

[0059] (3) Place the dust-free paper obtained in step (2) flat on the heating platform, and use a pipette gun to take 2.5mL of the catalyst suspension obtained in step (1) and apply it drop by drop on the dust-free paper at a uniform speed. Due to the high-efficiency water absorption of the paper, the liquid droplets will quickly spread to the surrounding area after contacting the dust-free paper, forming a uniformly loaded catalyst liquid film, and dried at 60°C for 20 minutes to prepare the loaded photocatalyst precursor.

[0060] (4) ...

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
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for immobilizing a photocatalyst on a flexible fiber substrate, and belongs to a photocatalysis technology. The method comprises the steps of adding a solvent into a photocatalyst and a silicon dioxide binder to prepare a catalyst turbid liquid; coating a flexible fiber substrate with the catalyst turbid liquid, and conducting drying to obtain a photocatalyst-loaded precursor; and soaking the photocatalyst-loaded precursor in an alkaline solution, and conducting drying to obtain the target product loaded photocatalyst, wherein the loading capacity of the photocatalyst is 0.2-1.6 mg / cm<2>. Compared with other loading methods, the method has the advantages that high-temperature treatment is not needed, the silicon dioxide binder and the flexible fiber substrate are adopted, the photocatalyst can be stably loaded on the carrier only by drying, the bonding effect is good, the operation is simple and convenient, the equipment requirement is low, the cost islow, and the loaded photocatalyst can be prepared on a large scale; the photocatalytic activity is high, and the photocatalyst has better reutilization performance in an alkaline reaction solution; and the selected flexible carrier material is convenient for other treatment, stable in performance and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a photocatalyst immobilization method on a flexible fiber substrate. Background technique [0002] The continuous development of economy and society has led to increasingly serious energy crisis and environmental pollution problems, and sustainable development is imminent. Photocatalytic technology can directly use sunlight to irradiate semiconductor catalysts to generate electron-hole pairs, and then drive redox reactions to realize photocatalytic water splitting to produce hydrogen and photocatalytic degradation of pollutants. It has important applications in the fields of energy and the environment. [0003] According to the different states of photocatalyst, it can be divided into powder suspension system and load immobilization system. The activity of the powder suspension system is higher. However, in order to ensure the suspension state of the catalyst particles d...

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): B01J31/06B01J27/04B01J21/06B01J35/06B01J37/02C01B3/04
CPCB01J31/06B01J27/04B01J21/063B01J37/0215B01J37/0236C01B3/042B01J35/39B01J35/58Y02E60/36
Inventor 陈玉彬朱汉卿李锐王朦胧郑文钰夏虹宇
Owner XI AN JIAOTONG 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