Co3O4 nano-structure microbial composite material based on flaky flexible carbon cloth and preparation method and application thereof

A nanostructure and composite material technology, which is applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of long degradation time and microbial influence, and achieves simple preparation method, low cost, good quality The effect of adsorption efficiency

Active Publication Date: 2020-08-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biological method has the advantages of economy, environmental protection and sustainability, which has attracted people's attention. If microorganisms are directly used to degrade dyes, the degradation time will be longer, and high-concentration dyes will also affect microorganisms.
Therefore, the simple use of microorganisms is limited in actual practice, and further exploration is needed.

Method used

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  • Co3O4 nano-structure microbial composite material based on flaky flexible carbon cloth and preparation method and application thereof
  • Co3O4 nano-structure microbial composite material based on flaky flexible carbon cloth and preparation method and application thereof
  • Co3O4 nano-structure microbial composite material based on flaky flexible carbon cloth and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] (2) CC / Co 3 o 4 Preparation of complex

[0043] concentrated NH 3 ·H 2 O and EG were mixed under vigorous stirring. Then, Na 2 CO 3 Pour into the above mixture and stir further. After that, the Co(NO 3 ) 2 Add to the mixture and stir again. Then, the solution was transferred into a stainless steel autoclave, and the above-mentioned pretreated carbon cloth was inserted into the autoclave. The stainless steel autoclave was subjected to hydrothermal reaction for 8 hours. Subsequently, the carbon cloth-supported Co was removed from the autoclave 3 o 4 nanocrystals, rinsed with water and ethanol in turn, and dried in an oven. Finally, the precursors were calcined in air to obtain Co 3 o 4 Nanosheets, denoted as CC / Co 3 o 4 .

[0044] (3) load P. putida CC / Co 3 o 4 preparation of

[0045] Loading microorganisms into CC / Co 3 o 4 surface to obtain nanobiocomposites.

[0046] All raw materials of the present invention are commercially available, and the...

Embodiment 1

[0047] Example 1 The pretreatment of carbon cloth, the specific steps are as follows:

[0048] First, cut the carbon cloth into small pieces (1mm*1mm), and 2 SO 4 Continuous sonication in aqueous solution for 2 hours for cleaning, followed by H 2 SO 4 The treated carbon cloth was further cleaned by ultrasonic treatment with acetone, water and ethanol for 30 min each in sequence. Finally, the treated carbon cloth was treated with HNO 3 (8M) soaking treatment for 12 hours to obtain treated carbon cloth, which is used in Example 2. attached figure 1 It is the scanning electron microscope picture of the carbon cloth after pretreatment. It can be seen from the picture that the surface of the carbon cloth after treatment is relatively clean.

Embodiment 2

[0049] Example 2 CC / Co 3 o 4 The preparation of complex, specific steps are as follows:

[0050] 12.5 mL concentrated NH 3 ·H 2 O (28 wt%) was mixed with 15 mL of EG (ethylene glycol) under vigorous stirring for 2 min. Then, 3.5 mL (1M) Na 2 CO 3 The aqueous solution was poured into the above mixture and stirred for 2 minutes. Afterwards, 5 mL of 1M Co(NO 3 ) 2 The aqueous solution was added to the mixture and stirred for another 20 minutes. Then, the solution was transferred to a 50 mL Teflon-lined stainless steel autoclave, and the above pretreated carbon cloth (0.5 g) was inserted into the autoclave, and the stainless steel autoclave was kept at 180 °C for 8 h , and let it cool naturally at room temperature. Subsequently, the carbon cloth-supported Co was removed from the autoclave 3 o 4 Nanocrystals were rinsed thoroughly with water and ethanol three times in turn, and dried in an oven at 60 °C for 12 h. Finally, the Co 3 o 4 Nanosheets, denoted as CC / Co 3 ...

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Abstract

The invention discloses a Co3O4 nano-structure microbial composite material based on flaky flexible carbon cloth and a preparation method and application thereof. The preparation method comprises thefollowing steps: cleaning the carbon cloth with sulfuric acid, cleaning with a solvent and soaking with nitric acid in sequence to obtain treated carbon cloth; mixing the treated carbon cloth with ammonia water, ethylene glycol, sodium carbonate and cobalt nitrate, performing hydrothermal reaction, and calcining to obtain Co3O4 nanosheets; and loading microorganisms onto the Co3O4 nanosheets to obtain the Co3O4 nanostructure microbial composite material based on the sheet-shaped flexible carbon cloth. The Co3O4 flaky nano structure is successfully prepared by a hydrothermal method, and the composite material has good adsorption and degradation effects on azo dyes. Besides, an adsorption method and a biological method can be effectively combined, the advantages of the adsorption method andthe biological method are brought into full play, and good development potential and application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of composite material preparation, in particular to the pretreatment of carbon cloth and Co 3 o 4 Preparation method of nanosheet composite and its application in azo dye treatment. Background technique [0002] With the rapid development of social economy and printing industry, environmental problems are particularly prominent and have aroused people's strong attention. Dyes have become an important part of the textile, printing, cosmetics, pharmaceutical and food processing industries, and complex dye components can induce mutations in animals and humans, and have teratogenic effects, among which azo dyes account for the largest proportion of harmful dyes; in addition , the biological carcinogenic, teratogenic and mutagenic effects of aniline compounds produced by azo dyes are more serious. Therefore, the removal of dyes from dye wastewater has become an important issue in water treatment. Therefore, looking for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F101/38
CPCC02F3/00C02F2101/38C02F2101/308Y02W10/37
Inventor 路建美陈冬赟
Owner SUZHOU UNIV
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