Waste reuse solar sewage purification airgel and preparation method thereof

A technology of reuse and solar energy, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, difficulty in large-scale, mass production, time-consuming, etc. question

Active Publication Date: 2021-08-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the use of hydrothermal reaction to prepare airgel is expensive and difficult to realize industrial production. At the same time, it is difficult to realize large-area and large-scale production due to the limitation of hydrothermal reaction equipment. It takes a lot of time to reduce graphene oxide by hydrothermal reaction. plenty of time

Method used

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  • Waste reuse solar sewage purification airgel and preparation method thereof
  • Waste reuse solar sewage purification airgel and preparation method thereof
  • Waste reuse solar sewage purification airgel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method for waste recycling solar sewage purification airgel, comprising the following steps:

[0041] (1) Add 1.5g graphite powder and 0.5g NaNO to the container 3 and 50ml of concentrated sulfuric acid, ice bath for 20min, then gradually add 4g KMnO 4 , the temperature was kept at 4 °C during this process, then stirred at 30 °C for 0.5 h, added 100 ml of deionized water and stirred at 95 °C for 20 min, and then added 20 ml of 30 wt% H 2 o 2Aqueous solution and 20ml deionized water, after cooling to room temperature, centrifuged at 8000rpm for 15min, first washed twice with 5wt%-10wt% HCl solution, then repeatedly centrifuged and washed with deionized water until the pH of the supernatant was 4-5, finally adopting the method of freeze-drying to obtain graphene oxide powder;

[0042] (2), in graphene oxide powder, mix 5wt% flake graphite powder, put into microwave oven, heat 5s under the power of 800W, obtain reduced graphene oxide;

[0043] (3), in the...

Embodiment 2

[0046] A preparation method for waste recycling solar sewage purification airgel, comprising the following steps:

[0047] (1) Add 2.5g graphite powder and 1.5g NaNO to the container 3 and 60ml of concentrated sulfuric acid, ice bath for 40min, then gradually add 8g KMnO 4 , the temperature was kept at 10°C during this process, then stirred at 40°C for 1.5h, added 100ml of deionized water and stirred at 95°C for 40min, and then added 40ml of 30wt% H 2 o 2 Aqueous solution and 20ml deionized water, after cooling to room temperature, centrifuged at 8000rpm for 15min, first washed twice with 5wt%-10wt% HCl solution, then repeatedly centrifuged and washed with deionized water until the pH of the supernatant was 4-5, finally adopting the method of freeze-drying to obtain graphene oxide powder;

[0048] (2), mix 7wt% graphite powder in graphene oxide powder, put into microwave oven, heat 10s under the power of 800W, obtain reduced graphene oxide;

[0049] (3), in the mixed solut...

Embodiment 3

[0052] A preparation method for waste recycling solar sewage purification airgel, comprising the following steps:

[0053] (1) Add 2g graphite powder and 1g NaNO to the container 3 and 55ml of concentrated sulfuric acid, ice bath for 30min, then gradually add 6g KMnO 4 , the temperature was kept at 8 °C during this process, then stirred at 35 °C for 1 h, added 100 ml of deionized water and stirred at 95 °C for 30 min, and then added 30 ml of 30 wt% H 2 o 2 and 20ml of deionized water, after cooling to room temperature, centrifuge at 8000rpm for 15min, wash twice with 5wt%-10wt% HCl solution, then repeatedly wash with deionized water until the pH of the supernatant is 4 —5, finally adopting the freeze-drying method to obtain graphene oxide powder;

[0054] (2), in graphene oxide powder, mix 6wt% flake graphite powder, put into microwave oven, heat 7s under the power of 800W, obtain reduced graphene oxide;

[0055] (3), in the mixed solution of 100ml water, 2g NaOH and 10g t...

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Abstract

The invention provides a waste recycling solar sewage purification airgel and a preparation method thereof, comprising steps: (1), adding graphite powder, NaNO 3 , concentrated sulfuric acid, KMnO 4 , deionized water, H 2 o 2 , using freeze-drying method to obtain graphene oxide powder; (2), adding graphite powder in graphene oxide powder, heating in microwave oven to obtain reduced graphene oxide; (3), mixing solution in water, NaOH and thiourea (4), add cellulose and alcohol to the reduced graphene oxide dispersion, ultrasonic treatment, after liquid nitrogen freezing, carry out freeze-drying, obtain graphene cellulose airgel, The graphene / cellulose airgel prepared by the present invention has excellent hydrophilic properties, extremely low density, extremely high porosity, and extremely low thermal conductivity. The size and thickness of the airgel can be controlled, which can meet its requirements. different applications.

Description

technical field [0001] The invention belongs to the technical field of airgel for purifying sewage, in particular to airgel for purifying sewage with solar energy by waste recycling and a preparation method thereof. Background technique [0002] With the rapid development of industry and economy, the problem of water pollution has gradually attracted people's attention. Using solar energy to generate water vapor and using specific devices to condense and recover it is an energy-saving and environmentally friendly sewage treatment method. To achieve efficient solar treatment of sewage, high-performance evaporation materials are the bottleneck factor. Therefore, the design and research of efficient water evaporation materials have become a research hotspot today. In general, evaporation materials should have the following characteristics: (1) excellent light-to-heat conversion efficiency, (2) low thermal conductivity to reduce heat diffusion, (3) high hydrophilicity to achiev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00C08J9/28C08L1/02C08K3/04C02F1/14
CPCY02A20/212
Inventor 巩峰李昊王文彬夏大维吴欣林戴庆文
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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