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Seaweed-based biochar capable of being used for solar seawater desalination and preparation method thereof

A solar energy and biochar technology, applied in solar thermal energy, solar thermal power generation, solar thermal collectors, etc., can solve the problems of environmental pollution, complicated operation, high cost, solve the problem of unpowered seawater desalination, inhibit salt deposition, delay Effects of Degradation Behavior

Active Publication Date: 2021-06-18
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other traditional solar desalination methods include ion exchange, reverse osmosis, distillation, electrodialysis, etc. These methods have problems such as high energy consumption, high cost, complicated operation, and environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Follow the steps below to prepare algae-based biochar for solar desalination:

[0033] S1. Add seaweed to distilled water, stir at 12,000 r / min for 30 minutes in an ice bath, and adjust the pH value to 8.5 to obtain solution 1;

[0034] S2. Add dopamine hydrochloride to solution 1 obtained in step S1, and stir at room temperature for 24 hours at a speed of 200 r / min to obtain solution 2;

[0035] S3. Add the suspension of black phosphorus nanosheets with a concentration of 0.2 mg / mL to the solution two obtained in step S2, and stir at room temperature at a speed of 200 r / min for 24 hours to obtain solution three, in which seaweed, distilled water, dopamine hydrochloride, and black phosphorus nanosheets are suspended The ratio of liquid is 10g:90mL:0.2g:10mL;

[0036] S4. Freeze-dry the solution 3 obtained in step S3 for 6 hours to obtain a mixture, place the mixture in a muffle furnace, heat up to 700° C., and then calcinate for 30 minutes to obtain seaweed-based bioch...

Embodiment 2

[0038] Follow the steps below to prepare algae-based biochar for solar desalination:

[0039] S1. Add seaweed to distilled water, stir at 12,000 r / min for 20 minutes in an ice bath, and adjust the pH value to 8.5 to obtain solution 1;

[0040] S2. Add dopamine hydrochloride to solution 1 obtained in step S1, and stir at room temperature for 18 hours at a speed of 200 r / min to obtain solution 2;

[0041] S3. Add the suspension of black phosphorus nanosheets with a concentration of 0.2 mg / mL to the solution two obtained in step S2, and stir at room temperature at a speed of 200 r / min for 18 hours to obtain solution three, in which seaweed, distilled water, dopamine hydrochloride, and black phosphorus nanosheets are suspended The ratio of liquid is 9g:90mL:0.2g:10mL;

[0042] S4. The solution 3 obtained in step S3 was freeze-dried for 4 hours to obtain a mixture, and the mixture was placed in a muffle furnace, heated to 700° C. and then calcined for 20 minutes to obtain seaweed-...

Embodiment 3

[0044] Follow the steps below to prepare algae-based biochar for solar desalination:

[0045] S1. Add seaweed to distilled water, stir at 12000 r / min for 40 minutes under ice bath conditions, adjust the pH value to 8.5 to obtain solution 1;

[0046] S2. Add dopamine hydrochloride to solution 1 obtained in step S1, and stir at room temperature for 30 hours at a speed of 200 r / min to obtain solution 2;

[0047] S3. Add the suspension of black phosphorus nanosheets with a concentration of 0.2 mg / mL to the solution two obtained in step S2, and stir at room temperature for 30 hours at a speed of 200 r / min to obtain solution three, in which seaweed, distilled water, dopamine hydrochloride, and black phosphorus nanosheets are suspended The ratio of liquid is 11g:90mL:0.2g:10mL;

[0048] S4. The solution 3 obtained in step S3 was freeze-dried for 8 hours to obtain a mixture, and the mixture was placed in a muffle furnace, heated to 700° C. and then calcined for 40 minutes to obtain s...

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Abstract

The invention provides seaweed-based biochar capable of being used for solar seawater desalination. The seaweed-based biochar is prepared by the following steps: S1, adding seaweed into distilled water, stirring for 20-40 minutes under an ice bath condition, and adjusting the pH value to 8.5 to obtain a solution I; s2, adding dopamine hydrochloride into the solution I obtained in the step S1, and stirring at room temperature for 18-30 hours to obtain a solution II; s3, adding the black phosphorus nanosheet suspension into the solution II obtained in the step S2, and stirring at room temperature for 18-30 hours to obtain a solution III; and S4, freeze-drying the solution III obtained in the step S3 for 4-8 hours to obtain a mixture, putting the mixture into a muffle furnace, heating to 700 DEG C, and calcining for 20-40 minutes to obtain the seaweed-based biochar capable of being used for solar seawater desalination. The invention also provides a preparation method of the seaweed-based biochar. The seaweed-based biochar provided by the invention has relatively good photothermal conversion performance and water evaporation performance.

Description

technical field [0001] The invention relates to a biochar, in particular to a seaweed-based biochar which can be used for solar seawater desalination and a preparation method thereof. Background technique [0002] Most traditional solar desalination technologies use membrane technology, which relies on organic polymer materials, and has certain limitations in the field of membrane separation, and salt deposits on the surface of the membrane during use, which reduces the desalination efficiency. Other traditional solar desalination methods include ion exchange, reverse osmosis, distillation, electrodialysis, etc. These methods have problems such as high energy consumption, high cost, complicated operation, and environmental pollution. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a seaweed-based biochar that can be used for solar seawater desalination, which has better light-to-heat conversion performance and wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/14C02F1/28C02F1/44B01J20/20B01J20/26B01J20/30F24S20/70
CPCC02F1/043C02F1/14C02F1/283C02F1/444B01J20/28054B01J20/267F24S20/70Y02A20/131Y02A20/212Y02A20/124Y02A20/142Y02E10/47
Inventor 刘琴高军凯李明尧胡倩男吴佳蝶崔颂嘉
Owner ZHEJIANG OCEAN UNIV
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