Composite thin film integrating photothermal conversion performance and adsorption characteristics as well as preparation and application of composite thin film

A technology of photothermal conversion and adsorption characteristics, applied in heat exchange materials, adsorbed water/sewage treatment, alkali metal compounds, etc., can solve problems such as difficult heavy metal ion purification, improve multiple purification effects, and facilitate large-scale production and preparation , the effect of accelerating the adsorption purification rate

Active Publication Date: 2016-10-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, photocatalytic technology is difficult to effectively purify heavy metal ions and refractory organic substances in water.

Method used

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  • Composite thin film integrating photothermal conversion performance and adsorption characteristics as well as preparation and application of composite thin film
  • Composite thin film integrating photothermal conversion performance and adsorption characteristics as well as preparation and application of composite thin film
  • Composite thin film integrating photothermal conversion performance and adsorption characteristics as well as preparation and application of composite thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of film with both light-to-heat conversion and adsorption functions

[0030] First, use the Hummers method to prepare a graphene oxide aqueous solution, prepare a 1mg / ml graphene oxide aqueous solution, take 1ml of the graphene oxide aqueous solution and drop it on the surface of a dust-free paper with a diameter of 2.5cm, and place it in an oven at 60°C. Dry to make graphene oxide dust-free paper. Graphene oxide on the surface of dust-free paper was reduced by hydrothermal method. Inject 20ml of distilled water and 10ml of ethanol into the inner tank of the high-pressure reactor, put the graphene oxide dust-free paper into the inner tank and seal it, keep it in a 120°C oven for 3 hours, cool down, take it out, and place it in a 60°C oven until it is dried . prepared as figure 1 Composite film composed of reduced graphene oxide and dust-free paper substrate is shown.

[0031] (2) Utilize the composite film prepared above to carry out pollutant adsorp...

Embodiment 2

[0036] A method for accelerating adsorption and purification by utilizing the photothermal effect of solar energy, the method comprising the following steps:

[0037](1) Preparation of film with both light-to-heat conversion and adsorption functions: a dust-free paper film with a porous micron structure is used as a substrate, and a layer of sheet-like carbon black nanopowder with both light-to-heat conversion and adsorption properties is deposited on the substrate template Prepared as a film with both light-to-heat conversion and adsorption functions. Specifically: uniformly disperse flaky carbon black powder with a sheet diameter of 50-200nm, which has both photothermal conversion and adsorption properties, into ethanol to obtain a solution with a mass concentration of 1-100mg / ml, and use physical deposition in the absence of A carbon black powder film is deposited on the base film of the dust paper to obtain a film with both light-to-heat conversion and adsorption functions...

Embodiment 3

[0040] The base film with a porous structure is a sponge; the substance with both photothermal conversion and adsorption properties is carbon nanotubes; the photothermal evaporation film is prepared by a spraying process: it will have both photothermal conversion and adsorption properties The substance with adsorption properties is that carbon nanotubes are evenly dispersed in ethanol (mass concentration is 1-100mg / ml), and a film with both photothermal conversion and adsorption functions is formed on the dust-free paper substrate through a spray pen device. All the other are with embodiment 2.

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Abstract

The invention relates to a composite thin film integrating photothermal conversion performance and adsorption characteristics as well as preparation and application of the composite thin film. The composite thin film comprises a substrate and a functional film which is deposited on the substrate and integrates the photothermal conversion performance and the adsorption characteristics, wherein the substrate is a micro-nano thin film with a porous structure; the functional film is made of nonmetal inorganic substances integrating the photothermal conversion performance and the adsorption characteristics. The composite thin film is placed on the upper surface of a to-be-adsorbed solution and is enabled to float on an interface of the solution and air and be sufficiently contacted with the solution, the functional film effectively adsorbs pollutants in the solution, and the purpose of adsorbing the pollutants is achieved; meanwhile, the floating composite thin film is illuminated, a photothermal conversion effect of the nonmetal inorganic substances in the composite thin film is triggered, a local heating effect is generated at the interface of the solution and air, and rapid evaporation of a solvent is promoted, so that the pollutants are accelerated to be diffused into and adsorbed by the composite thin film. The method adopting the composite thin film for sewage purification has the advantages of high adsorption capacity, high adsorption rate, high interface heating and evaporating speed and the like.

Description

technical field [0001] The invention belongs to the technical field of pollutant adsorption transfer and sewage purification, and in particular relates to a composite film having both light-to-heat conversion performance and adsorption characteristics, and its preparation and application. Background technique [0002] The rapid development of modern industry has brought more and more damage to the natural environment. Among them, water pollution is the hardest hit area of ​​environmental pollution, and water purification is one of the major issues facing the sustainable development of human society. Pollutants in water mainly include: heavy metal ions, dyes, oil and other organic pollutants. Among them, the main source of heavy metal ion pollutants such as mercury ions is the metallurgy, production and application of mercury-containing compounds. Dyes are widely used in food, medicine, printing and dyeing, cosmetics and other industries. According to statistics, there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/20B01J20/26B01J20/24C02F1/28C02F1/14C09K5/14
Inventor 邓涛陶鹏尚文娄金伟刘洋宋成轶邬剑波
Owner SHANGHAI JIAO TONG UNIV
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