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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 unde

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  • 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
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Example Embodiment

[0044] Example 1

[0045] (1) 40mg of CZS photocatalyst and 40mg of silicon dioxide powder with a diameter of 300nm were added to 5mL of deionized water, and ultrasonically oscillated for 30min to disperse uniformly, and configured into a catalyst suspension with a concentration of 8mg / mL, for subsequent use;

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

[0047] (3) Place the dust-free paper obtained in step (2) on a heating table, and use a pipette to take 2.5 mL 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 water absorption of the paper, the droplets will quickly spread to the surrounding area after contacting the clean paper to form a uniformly loaded cat...

Example Embodiment

[0050] Example 2

[0051] (1) 400mg CZS photocatalyst and 400mg silicon dioxide powder with a diameter of 300nm were added to 25mL deionized water, ultrasonically oscillated for 30min to disperse uniformly, and configured into a catalyst suspension with a concentration of 16mg / mL, for subsequent use;

[0052] (2) Model 0609 dust-free wiping paper is selected as the carrier material, with a size of 20cm*20cm, rinsed with deionized water and dried for 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 use a pipette to take 20 mL of the catalyst suspension obtained in step (1) dropwise at a constant speed Drop-coated on clean paper and dried under sunlight to obtain a supported photocatalyst precursor.

[0054] (4) put the loaded photocatalyst precursor obtained in step (3) into the configured sodium sulfide / sodium sulfite solution with pH=12 and soak for 5h, then place it on an...

Example Embodiment

[0056] Example 3

[0057] (1) 80mg TiO 2 (P25) The photocatalyst and 80 mg of silica powder with a diameter of 500 nm were added to 10 mL of deionized water, and the dispersion was uniformly dispersed by ultrasonic vibration for 30 min.

[0058] (2) Model 0609 dust-free wiping paper is selected as the carrier material, cut to a size of 5cm*5cm, rinsed with deionized water, and dried for later use;

[0059] (3) Place the dust-free paper obtained in step (2) on a heating table, and use a pipette to take 2.5 mL 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 water absorption of the paper, the droplets will quickly spread to the surrounding area after contacting the dust-free paper, forming a uniformly loaded catalyst liquid film.

[0060] (4) The supported photocatalyst precursor obtained in step (3) is soaked in the prepared sodium hydroxide solution with pH=12.5 for 4 hours, and then dried on...

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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

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Application Information

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IPC IPC(8): B01J31/06B01J27/04B01J21/06B01J35/06B01J37/02C01B3/04
CPCB01J31/06B01J27/04B01J21/063B01J35/004B01J35/06B01J37/0215B01J37/0236C01B3/042Y02E60/36
Inventor 陈玉彬朱汉卿李锐王朦胧郑文钰夏虹宇
Owner XI AN JIAOTONG UNIV
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