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A photocatalyst immobilization method on a flexible fiber substrate

A photocatalyst and flexible fiber technology, applied in the field of photocatalysis, can solve problems such as unfavorable photocatalytic reactions, reduce opportunities for reuse of loaded photocatalysts, and limited application range, so as to reduce mass transfer limitations, increase surface area and illumination area, Avoid the effect of high running costs

Active Publication Date: 2022-02-11
XI AN JIAOTONG UNIV
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  • 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

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  • A photocatalyst immobilization method on a flexible fiber substrate
  • A photocatalyst immobilization method on a flexible fiber substrate
  • A photocatalyst immobilization method on a 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) ...

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Abstract

The invention discloses a photocatalyst immobilization method on a flexible fiber substrate, which belongs to photocatalysis technology. Add a solvent to the photocatalyst and silica binder to configure a catalyst suspension; coat the catalyst suspension on a flexible fiber substrate and dry to obtain a loaded photocatalyst precursor; the loaded photocatalyst precursor Soak in alkaline solution and dry to get the target product loaded photocatalyst, the loading capacity of photocatalyst is 0.2~1.6mg / cm 2 . Compared with other loading methods, this method does not require high-temperature treatment, uses silica binder and flexible fiber substrate, and can stably load the photocatalyst on the carrier only by drying, with good bonding effect, easy operation, and equipment Low requirements, low cost, large-scale preparation of supported photocatalysts; high photocatalytic activity, better reusability in alkaline reaction liquids; flexible carrier materials selected, easy for other treatments, stable performance, applicable to all areas wide.

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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Patent Type & Authority Patents(China)
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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