G-C3N4-ZnS composite nanomaterial as well as preparation method and application thereof

A composite nanomaterial, zinc sulfide technology, applied in chemical instruments and methods, catalyst activation/preparation, nanotechnology, etc., can solve the problems of low quantum efficiency, high coincidence rate of photogenerated electron holes, limited application, etc., and achieve strong formaldehyde Degradation ability, the effect of improving the photocatalytic degradation ability

Inactive Publication Date: 2019-08-02
ZHENJIANG COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But a single g-C 3 N 4 The photodegradation performance of photocatalysts under visible light conditions is not high, due to the high coincidence rate of photogenerated electron-hole pairs and low quantum efficiency, which limits its application in the field of photocatalysis

Method used

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  • G-C3N4-ZnS composite nanomaterial as well as preparation method and application thereof
  • G-C3N4-ZnS composite nanomaterial as well as preparation method and application thereof
  • G-C3N4-ZnS composite nanomaterial as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of carbon nitrogen-zinc sulfide composite nanomaterials

[0025] 1.78g Zn(AC) 2 Dissolve in 50mL ethanol aqueous solution (according to volume ratio V 乙醇 :V 去离子水 =1:0.5~2), and then 0.05g of g-C prepared by solid phase method 3 N 4 Nanosheets and 0.02 g of hexadecyl diethylammonium bromide were added to the above solution, and after ultrasonic dispersion for 2 h, sodium sulfide solution (25 mL, 0.1 mol / L) was added dropwise until the precipitation was complete, and the mixture was transferred to a 100 ml In a stainless steel reaction kettle, place it in a vacuum drying oven at 160°C for 24 hours, and cool to room temperature. After the reaction product was separated by centrifugation, it was washed repeatedly three times with deionized water and absolute ethanol, and finally dried under vacuum at 80°C for 10 h to obtain g-C 3 N 4 / ZnS composite nanomaterials.

[0026] 2. Preparation of carbon nitrogen-zinc sulfide composite photocatalytic coating ...

Embodiment 2

[0029] 1. Preparation of carbon nitrogen-zinc sulfide composite nanomaterials

[0030] 2.75g Zn(NO 3 ) 2 Dissolve in 50mL ethanol aqueous solution (according to volume ratio V 乙醇 :V 去离子水 =1:0.5~2), and then 0.1g of g-C prepared by solid phase method 3 N 4 Nanosheets and 0.04 g of polyethylene glycol were added to the above solution, and after ultrasonic dispersion for 1 h, ammonium sulfide solution (25 mL, 0.1 mol / L) was added dropwise until the precipitation was complete, and the mixed solution was transferred to a 100 ml stainless steel reaction kettle, and placed Insulate at 160° C. for 24 hours in a vacuum oven, and cool to room temperature. After the reaction product was separated by centrifugation, it was washed repeatedly three times with deionized water and absolute ethanol, and finally dried under vacuum at 80°C for 10 h to obtain g-C 3 N 4 / ZnS composite nanomaterials.

[0031] 2. Preparation of carbon nitrogen-zinc sulfide composite photocatalytic coating

...

Embodiment 3

[0034] 1. Preparation of carbon nitrogen-zinc sulfide composite nanomaterials

[0035] 1.24g Zn(SO 4 ) 2 Dissolve in 50mL ethanol aqueous solution (according to the volume ratio V 乙醇 :V 去离子水 =1:0.5~2), and then 0.25g of g-C prepared by solid phase method 3 N 4 Nanosheets and 0.06 g of sodium lauryl sulfate were added to the above solution, and after ultrasonic dispersion for 2 h, thiourea aqueous solution [CS(NH 2 ) 2 ] (10mL, 0.5mol / L) until the precipitation was complete, the mixture was transferred to a 100ml stainless steel reaction kettle, placed in a vacuum oven at 180°C for 16h, and cooled to room temperature. After the reaction product was separated by centrifugation, it was washed repeatedly three times with deionized water and absolute ethanol, and finally dried under vacuum at 80°C for 10 h to obtain g-C 3 N 4 / ZnS composite nanomaterials.

[0036] 2. Preparation of carbon nitrogen-zinc sulfide composite photocatalytic coating

[0037] 0.1 g of g-C 3 N 4...

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Abstract

The invention discloses a g-C3N4-ZnS composite nanomaterial as well as a preparation method and an application thereof. The particle size of the material is 30-100 nm, and the material contains 5wt%-25wt% of g-C3N4 and the balance of ZnS. The method comprises steps as follows: a Zn source, g-C3N4 nanosheets, a surfactant and an S source are added to aqueous ethanol solution successively, the solution is ultrasonically dispersed and subjected to a hydrothermal reaction and then is separated, washed and dried, and the composite nanomaterial can be obtained. The composite nanomaterial is subjected to ball milling with a curing agent and filler, an inorganic adhesive is added, all materials are stirred uniformly, spray slurry is obtained and sprayed to the surface of a base material at a rateof 0.4-0.6 m / s under 0.45-0.55 MPa, cleaning and air-drying are performed after multi-stage heat treatment, and a g-C3N4-ZnS composite photocatalytic coating is obtained. The preparation technology issimple, and the composite photocatalytic coating prepared with the technology has higher formaldehyde degradation capacity and can be greatly applied to the fields of air purification, sewage treatment and the like.

Description

technical field [0001] The invention relates to the field of nanometer materials and environment-friendly materials, and relates to a carbanitrone-zinc sulfide composite nanometer material and its preparation method and application. Background technique [0002] Traditional photocatalytic materials represented by titanium dioxide have been widely used in photocatalytic purification of the environment due to their excellent physical and chemical properties, which is one of the important ways to solve the current increasingly serious environmental pollution problems. At present, the core of the application of photocatalytic technology based on titanium dioxide is mainly to improve its own photocatalytic performance and coating bonding strength. However, titanium dioxide can only absorb 4% to 5% of ultraviolet light in the solar spectrum, and the utilization rate of visible light is low. Therefore, the development of novel and efficient composite photocatalytic materials is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/02B01J37/08B82Y30/00B82Y40/00B01D53/86B01D53/72
CPCB01J27/24B01J35/004B01J37/0215B01J37/0228B01J37/08B82Y30/00B82Y40/00B01D53/007B01D53/8668B01D2257/704B01D2258/06B01D2259/802
Inventor 张飞霞唐国钢
Owner ZHENJIANG COLLEGE
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