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Light-driven photocatalytic reactor and preparation method thereof

A photocatalytic reactor and light-driven technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems that photocatalysts are not easy to recycle, and achieve improved The effect of light energy utilization rate and photocatalytic efficiency, simple preparation method, and low raw material price

Active Publication Date: 2021-06-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through this catalytic method, not only can the maximum light energy be captured, but also effectively solve the problem that photocatalysts are not easy to recycle.

Method used

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  • Light-driven photocatalytic reactor and preparation method thereof
  • Light-driven photocatalytic reactor and preparation method thereof
  • Light-driven photocatalytic reactor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] figure 1 It is a schematic diagram of a light-driven photocatalytic reactor. In this embodiment, cadmium sulfide / reduced graphene oxide is used as a photocatalyst as an example for the production of hydrogen peroxide, including the following steps:

[0036] (1) Take 3g of N-isopropylacrylamide monomer, stir and dissolve it in 30mL of a mixed solution of n-hexane and acetone with a volume ratio of 10:1 at 30°C, then cool at -10°C to precipitate crystals, pump After filtering and drying, the purified N-isopropylacrylamide monomer was obtained.

[0037] (2) Based on the total mass of 3g, weigh 1.2g of the N-isopropylacrylamide monomer obtained in step (1), 0.06g of N,N'-methylenebisacrylamide and 0.015g of 2-hydroxy - Dissolve 2-methylpropiophenone in 1.7145g of dimethyl sulfoxide, then add 0.0105g of graphene oxide into the mixed solution, and ultrasonically disperse to obtain a graphene oxide / N-isopropylacrylamide dispersion.

[0038] (3) Similarly, based on the total ...

Embodiment 2

[0049] The cadmium sulfide / reduced graphene oxide in Example 1 was changed to polymer carbon nitride, and the rest were the same as in Example 1, and the finally obtained light-driven photocatalytic reactor was designated as PPR-1. After testing, it is found that PPR-1 can stably follow the direction of oblique incident light as mentioned above, ensuring its maximum capture of light energy. In addition, the bending process of PPR-1 is reversible, and it can basically return to the upright state in about 30 minutes after being bent at 90°.

Embodiment 3

[0051] Change the concentration of cadmium sulfide / reduced graphene oxide in Example 1 to 2.5wt%, that is, the quality is changed to 0.075g, and the quality of dimethyl sulfoxide is changed to 1.65g accordingly, and all the other are the same as in Example 1. The driven photocatalytic reactor is denoted as PPR-2. After testing, it is found that PPR-2 can bend towards the light within about 50s under oblique light, and follow the direction of the incident light. Again, recovery occurs around 30 min.

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Abstract

The invention discloses a light-driven photocatalytic reactor and a preparation method thereof, and belongs to the technical field of novel energy conversion materials. A polymer composite material of the invention is composed of two parts which are both based on poly (N-isopropylacrylamide) hydrogel, reduced graphene oxide and a photocatalyst are respectively added into a hydrogel precursor to prepare two hydrogels, and the two hydrogels are combined to obtain the light-driven photocatalytic reactor. The two hydrogels are respectively used for simulating the neck and the flower disc of a sunflower, so that the light-driven photocatalytic reactor can autonomously phototaxis and always keep the flower disc surface vertical to the incident direction of a light source during illumination. According to the method disclosed by the invention, the energy loss generated under the condition of non-vertical incidence of light rays is reduced, a traditional photocatalysis mode is changed, and the problem that a photocatalyst is not easy to recycle is solved. The method is simple, raw materials are low in price, and the reactor has universality and good commercialization prospects as a universal strategy and can be applied to the field of energy conversion such as photocatalysis.

Description

technical field [0001] The invention relates to a light-driven photocatalytic reactor and a preparation method thereof, belonging to the technical field of new energy conversion materials. Background technique [0002] Many organisms in nature have the ability to orient themselves towards light sources, that is, phototaxis. For example, sunflowers can adapt to changes in the incident angle of sunlight in the environment to obtain maximum energy, thereby reducing the energy loss caused by oblique irradiation of light, so as to meet the needs of growth and reproduction. The oblique energy loss refers to the phenomenon that the incident energy density is reduced when light is irradiated on a plane at a certain angle. The formula P=P can be used max · cosθ to simply express. Thus, for light of a given intensity, the greater the angle, the greater the energy loss. For example, when the inclination angle is 60°, the energy loss is 50%. Therefore, if artificial phototropism is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/12B01J27/04B01J27/24B01J31/06
CPCB01J19/12B01J27/04B01J27/24B01J31/069B01J35/39B01J35/23
Inventor 刘天西秦静静赖飞立
Owner JIANGNAN UNIV
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