Preparation method of TiO2 photocatalyst filter paper

A photocatalyst and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, filter paper, etc., can solve problems such as hindering the application of TiO, low quantum efficiency, etc., to increase the application effect of photocatalysis, increase the specific surface area, increase absorption effect

Pending Publication Date: 2021-12-07
CHONGQING FIBER RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the properties of titanium dioxide, currently TiO 2 It has been widely used in the fields of water treatment and air purification, but due to the high recombination of photogenerated electron-hole pairs and wide bandgap (3.2eV), TiO 2 The low quantum efficiency in photocatalytic reactions greatly hinders the TiO 2 Applications

Method used

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  • Preparation method of TiO2 photocatalyst filter paper
  • Preparation method of TiO2 photocatalyst filter paper
  • Preparation method of TiO2 photocatalyst filter paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of TiO 2 The preparation method of photocatalyst filter paper, described preparation method comprises the following steps:

[0034] 1) Modified TiO with reduced graphene oxide 2 ,

[0035] specific,

[0036] S1: 0.14g of TiO 2 The powder is ultrasonically dissolved in 50ml of absolute ethanol to obtain a precursor solution;

[0037] S2: ultrasonically dissolving 0.001 g of graphene oxide powder in a mixture of 20 ml of deionized water and 10 ml of absolute ethanol to obtain a graphene oxide dispersion;

[0038] S3: Add graphene oxide dispersion liquid to the precursor liquid, and stir the precursor liquid after adding the dispersion liquid by a magnetic stirrer under ultraviolet light, the stirring time is 120min, and the stirring frequency is 500r / min;

[0039] S4: the stirred liquid is left to stand until complete precipitation, and the precipitate is obtained;

[0040] S5: The obtained precipitate was filtered, washed three times with absolute ethanol, a...

Embodiment 2

[0046] A kind of TiO 2 The preparation method of photocatalyst filter paper, described preparation method comprises the following steps:

[0047] 1) Modified TiO with reduced graphene oxide 2 ,

[0048] specific,

[0049] S1: 0.15g of TiO 2 The powder is ultrasonically dissolved in 50ml of absolute ethanol to obtain a precursor solution;

[0050]S2: ultrasonically dissolving 0.0015 g of graphene oxide powder in a mixture of 20 ml of deionized water and 10 ml of absolute ethanol to obtain a graphene oxide dispersion;

[0051] S3: Add graphene oxide dispersion liquid to the precursor liquid, and stir the precursor liquid after adding the dispersion liquid by a magnetic stirrer under ultraviolet light, the stirring time is 140min, and the stirring frequency is 600r / min;

[0052] S4: the stirred liquid is left to stand until complete precipitation, and the precipitate is obtained;

[0053] S5: The obtained precipitate was filtered, washed three times with absolute ethanol, a...

Embodiment 3

[0059] A kind of TiO 2 The preparation method of photocatalyst filter paper, described preparation method comprises the following steps:

[0060] 1) Modified TiO with reduced graphene oxide 2 ,

[0061] specific,

[0062] S1: 0.16g of TiO 2 The powder is ultrasonically dissolved in 50ml of absolute ethanol to obtain a precursor solution;

[0063] S2: ultrasonically dissolving 0.002g of graphene oxide powder in a mixture of 20ml of deionized water and 10ml of absolute ethanol to obtain a graphene oxide dispersion;

[0064] S3: Add graphene oxide dispersion liquid to the precursor liquid, and stir the precursor liquid after adding the dispersion liquid with a magnetic stirrer under ultraviolet light, the stirring time is 150min, and the stirring frequency is 1000r / min;

[0065] S4: the stirred liquid is left to stand until complete precipitation, and the precipitate is obtained;

[0066] S5: The obtained precipitate was filtered, washed three times with absolute ethanol, a...

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Abstract

The invention provides a preparation method of TiO2 photocatalyst filter paper. The preparation method comprises the following steps: 1) modifying TiO2 by adopting reduced graphene oxide; 2) carrying out annealing modification on the TiO2 catalyst obtained by modification in the step 1); and 3) loading the TiO2 catalyst obtained in the step 2) onto a fiber product. According to the preparation method disclosed by the invention, the graphene oxide dispersion liquid and the TiO2 dispersion liquid are mixed and then reduced to obtain the RGO / TiO2 composite material, so that the specific surface area of the original TiO2 is increased; then the composite material is subjected to annealing modification for increasing oxygen vacancies of TiO2 on the composite material, so that the photocatalytic performance of TiO2 is changed; and the obtained catalyst with a large specific surface area and more oxygen vacancies is loaded on filter paper for air filtration under the condition of a proper pH value, so that the filter paper loaded with the TiO2 photocatalyst can perform photocatalytic decomposition on effective substances in air under the action of visible light, and the photocatalytic application effect of the TiO2 photocatalyst is improved.

Description

technical field [0001] The present invention relates to TiO 2 Photocatalyst filter paper technical field, especially relate to a kind of TiO 2 Preparation method of photocatalyst filter paper. Background technique [0002] Titanium dioxide is an industrially important wide-bandgap semiconductor that has been widely used in sunscreens, paints, ointments, toothpaste and catalysis. Since the discovery of TiO by Fujishima and Honda 2 Since the phenomenon of photocatalytic water splitting on the electrode. Has been working on TiO 2 The study of materials that enable their use as active materials in photovoltaics, photoelectrochemical cells and photocatalysts. Compared with other semiconductor materials, TiO 2 It has multiple advantages in photocatalytic reactions, including earth abundance, low toxicity, chemical and thermal stability, and photoresistance. [0003] Based on the properties of titanium dioxide, currently TiO 2 It has been widely used in the fields of water ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): D21H27/08D21H17/69D21H21/14B01J21/18B01J21/06B01D39/18B01D53/86
CPCD21H27/08D21H17/69D21H21/14B01J21/063B01J21/18B01D39/18B01D53/86B01D2255/802B01J35/39
Inventor曾影罗杰唐露皮其豪
OwnerCHONGQING FIBER RES & DESIGN INST CO LTD