Method for preparing CuO/CeO2 composite material by utilizing aquatic plant enrichment and application of CuO/CeO2 composite material

A technology of composite materials and aquatic plants, applied in the application field of photocatalytic carbon dioxide conversion to methanol, to achieve the effects of improving utilization rate, enhancing photocatalytic activity, and reducing environmental pollution

Active Publication Date: 2021-07-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has a great negative impact on the aquatic environment and crop growth

Method used

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  • Method for preparing CuO/CeO2 composite material by utilizing aquatic plant enrichment and application of CuO/CeO2 composite material
  • Method for preparing CuO/CeO2 composite material by utilizing aquatic plant enrichment and application of CuO/CeO2 composite material
  • Method for preparing CuO/CeO2 composite material by utilizing aquatic plant enrichment and application of CuO/CeO2 composite material

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Experimental program
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Effect test

Embodiment 1

[0029] First weigh 7.59g of cerium nitrate and 4.22g of copper nitrate and put them into different beakers with 500ml water respectively. 7 and 5 (pH regulator is NaOH or HNO 3 ), then use deionized water to clean a certain amount of Hollow lotus and water hyacinth, put the washed Hollow lotus and water hyacinth into cerium nitrate and copper nitrate solution for adsorption for 6 hours respectively, and measure Ce 4+ 、Cu 2+ The adsorption amounts are 23mg / g and 32mg / g respectively (measured by inductively coupled plasma-atomic emission spectrometry ICP-AES, there will be some mineral elements in aquatic plants, but these mineral elements are extremely small and unstable, and they are sensitive to light. Catalytic activity and experimental results have no effect); the above-mentioned absorbed Herb Alternatus and water hyacinth are taken out, the cerium salt and copper salt on the surface are cleaned with deionized water, the roots are cut off, then dried at 80 ° C, and ground ...

Embodiment 2

[0036] First weigh 7.56g of cerium nitrate and 4.25g of copper nitrate and put them into different beakers with 500ml of water respectively. 7 and 5, then use deionized water to clean a certain amount of Hollow Lotus and Water Hyacinth, put the washed Hollow Lotus and Water Hyacinth into cerium nitrate and copper nitrate solutions for adsorption for 2 hours, and measure Ce 4+ 、Cu 2+ The adsorption amounts of the two are 8mg / g and 10mg / g respectively; take out the above-mentioned absorbed lotus and water hyacinth, wash the cerium salt and copper salt on the surface with deionized water, cut off the root, then dry it at 80°C, and grind it into Powder: Weigh 1g of water hyacinth powder and 1g of lotus root powder and dissolve them in 100ml of water, adjust the pH value to 7, stir well, heat in a water bath at 60°C for 1 hour, and centrifuge and dry the obtained solution; the above dry mixture Transfer to a crucible, heat in a muffle furnace to 500°C for 2 hours, and finally grin...

Embodiment 3

[0038] First weigh 7.53g of cerium nitrate and 4.26g of copper nitrate and put them into different beakers with 500ml water respectively. 7 and 5, then use deionized water to clean a certain amount of Hollowflower and water hyacinth, put the washed hollow lotus and water hyacinth into cerium nitrate and copper nitrate solutions for adsorption for 4 hours, and measure Ce 4+ 、Cu 2+ The adsorption amounts of 15mg / g and 21mg / g respectively; take out the above-mentioned absorbed lotus and water hyacinth, wash the cerium salt and copper salt on the surface with deionized water, cut off the root, then dry at 80 °C, and grind into Powder: Weigh 1g of water hyacinth powder and 1g of lotus root powder and dissolve them in 100ml of water, adjust the pH value to 7, stir well, heat in a water bath at 60°C for 1 hour, and centrifuge and dry the obtained solution; the above dry mixture Transfer to a crucible, heat in a muffle furnace to 500°C for 2 hours, and finally grind to obtain carbon-...

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Abstract

The invention belongs to the field of photocatalytic materials, and discloses a method for preparing a CuO / CeO2 composite material by utilizing aquatic plant enrichment and application of the CuO / CeO2 composite material. Water hyacinth and alternanthera philoxeroides are respectively placed in a copper nitrate solution and a cerous nitrate solution for adsorption, the adsorbed water hyacinth and alternanthera philoxeroides root systems are dried and crushed, dissolved in water, and heated in a water bath to obtain a uniformly dispersed mixture; and grinding is conducted after drying and calcining to obtain the carbon-doped CuO / CeO2 composite material. The excellent selective adsorption characteristics of the water hyacinth and the alternanthera philoxeroides are fully utilized, copper ions and cerium ions in water are enriched, in-situ carbon doping of oxides is achieved in the calcination process, the separation efficiency of photon-generated carriers is improved while sunlight absorption is improved, and the method is used for photocatalytic conversion of carbon dioxide into methanol. Compared with a traditional preparation method, the raw material cost is low, and the activity of photocatalytic conversion of carbon dioxide is high.

Description

technical field [0001] The invention belongs to the field of new chemical materials, and in particular relates to a kind of two different aquatic organisms of water hyacinth and hollow lotus root system as adsorbents, respectively enriching two different metal ions Cu 2+ 、Ce 4+ , and then one-step calcination method to prepare CuO / CeO 2 Composite materials and their application in the field of photocatalytic carbon dioxide conversion to methanol. Background technique [0002] Energy and environmental issues are two important issues facing mankind today. Harnessing solar energy to convert carbon dioxide into valuable products offers a viable solution to global warming and the energy crisis. Among the different products of the photocatalytic conversion of carbon dioxide, methanol is one of the most industrially valuable conversion products. The photocatalytic reduction of carbon dioxide to methanol can not only solve the energy crisis, but also realize the "carbon cycle", ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07C29/154C07C31/04
CPCB01J23/002B01J23/83B01J35/004C07C29/154C07C31/04Y02P20/52
Inventor 李霞章孙利国李文俊纪俊玲朱劼陈群
Owner CHANGZHOU UNIV
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