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Solar energy fuel and preparation method thereof

A solar energy and fuel technology, applied in the field of solar energy utilization, can solve the problems of heat loss, large space occupied by the system, unstable sunlight, etc., and achieve the effect of easy movement, storage and convenient use.

Inactive Publication Date: 2015-02-11
邢休东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these two solar energy utilization methods are due to the instability of sunlight, and there is an energy storage problem. For example, a system composed of solar cells needs a supporting battery to store the converted electric energy in case the energy is needed at night or on cloudy days. When used; widely used solar water heaters cannot provide the required energy due to the gradual loss of heat in continuous sunless weather
In addition, in order to obtain more solar energy, the existing systems require a large light-collecting area. Since the systems are all rigid structures, the system takes up a lot of space when not in use or in standby, not to mention Ease of moving and transporting the system

Method used

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  • Solar energy fuel and preparation method thereof
  • Solar energy fuel and preparation method thereof

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Effect test

Embodiment 1

[0018] Take thickness 2mm, density about 5mg / cm 3 Carbon nanotube / graphene-based elastic aerogel, immerse the elastic aerogel in concentrated sulfuric acid and reflux for one hour, take it out and wash it with deionized pure water until it is neutral, send it to a drying oven and heat it up to 90°C for drying, and dry it The final elastic airgel is put into the ethanol solution dissolved in azobenzene and heated to 80°C for two hours to carry out chemical synthesis and grafting reaction, so that the azobenzene is linked to the carbon nanotube wall in the elastic airgel, The grafted elastic airgel is the solar fuel.

Embodiment 2

[0020] Take thickness 3mm, density about 20mg / cm 3 carbon nanotube elastic airgel, immerse the elastic airgel in concentrated sulfuric acid and reflux for one hour, take it out and wash it with deionized pure water until it becomes neutral, send it to a drying oven and heat it up to 90°C for drying, and condense the dried elastic airgel Put the glue into the ethanol solution with spiropyran dye, heat the elastic aerogel with electricity, control the current to keep the temperature at 80°C, and carry out grafting reaction, so that the spiropyran dye is linked to the carbon of the elastic aerogel On the nanotube wall, the grafted elastic airgel is the solar fuel.

Embodiment 3

[0022] Take one unit of carbon nanotubes, ultrasonically disperse the carbon nanotubes in concentrated sulfuric acid and reflux for one hour, take them out and wash them with deionized pure water until they are neutral, send them to a drying oven and heat them up to 90°C for drying, and the dried carbon nanotubes Put it into an ethanol solution dissolved in azobenzene and heat it up to 80°C to reflux for two hours to carry out chemical synthesis grafting reaction, so that azobenzene is linked to the carbon nanotube wall, and the reaction product is mixed with 0.2 units of graphene, and added Deionized pure water, subjected to supercritical freeze-drying, made into a thickness of 1mm and a density of about 50mg / cm 3 The elastic airgel obtained is the solar fuel.

[0023] The solar fuel formed in the above embodiments is expanded to absorb solar energy, stacked or bundled up, triggered by external heating, light, catalyst, energization, etc. or naturally relaxed to release the s...

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Abstract

The invention relates to a solar energy fuel, wherein in an elastic aerogel comprising carbon nano-tubes and graphene, photoinduced isomers (such as azobenzene or a compound containing an azobenzene group, a spiropyran compound, a diaryl vinyl compound and the like) are grafted on the wall of the carbon nano-tubes. A purpose of the present invention is to provide a novel way adopting solar energy and overcome problems of energy storage, difficult equipment moving and the like in the existing way adopting solar energy. According to the present invention, carbon nano-tubes (or addition of graphene) is adopted to prepare the sheet-like (or flannel-like) elastic aerogel, and then two photoinduced isomers with stable structure and different energy levels are covalently grafted, or two photoinduced isomers with stable structure and different energy levels are covalently grafted on carbonnano-tubes, and then the functionalized carbon nano-tubes are adopted to prepare the sheet sponge-like elastic aerogel; and the prepared solar energy fuel of the present invention provides the novel approach for the solar energy utilization.

Description

technical field [0001] The invention relates to the technology in the field of solar energy utilization, in particular to a solar fuel. Background technique [0002] Solar energy has attracted widespread attention as a renewable clean energy. At present, there are two main types of solar energy utilization, one is solar cell devices, such as silicon solar cells, which use semiconductor photoelectric conversion materials to convert light energy into electrical energy, and then utilize it; the other is solar heat storage devices, such as solar energy The water heater converts light energy into heat energy, stores it in liquid substances such as water with a large specific heat, and then uses it. These two solar energy utilization methods are due to the instability of sunlight, and there is an energy storage problem. For example, a system composed of solar cells needs a supporting battery to store the converted electrical energy in case the energy is needed at night or on clou...

Claims

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Application Information

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IPC IPC(8): C09K5/16
CPCC09K5/16
Inventor 邢休东
Owner 邢休东
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