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Biomass nanomaterial porous microsphere and preparation method thereof

A technology of nanomaterials and porous microspheres, applied in separation methods, chemical instruments and methods, filter regeneration, etc., can solve problems such as difficult recycling, low utilization efficiency of nanomaterials, secondary pollution, etc., and achieve efficient adsorption and degradation , the implementation scheme is simple and easy, and the effect of high adsorption efficiency

Pending Publication Date: 2021-09-10
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing material preparation methods are difficult to recycle after application, causing secondary pollution, or have low utilization efficiency of nanomaterials, so they are not suitable for direct application in sewage treatment

Method used

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  • Biomass nanomaterial porous microsphere and preparation method thereof
  • Biomass nanomaterial porous microsphere and preparation method thereof
  • Biomass nanomaterial porous microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Stir and pulverize 10g of pulp, soak in 400mL of 4.5wt% sodium hydroxide solution for 36h; disperse the obtained pretreated cellulose in 400mL of deionized water, add 3g of potassium permanganate, and at the same time add 1.5g of oxalic acid, add 36mL of concentrated sulfuric acid, Stirring and reacting at 55° C. for 12 h, washing the obtained precipitate repeatedly until the supernatant becomes turbid when washing the precipitate, and obtaining a suspension of cellulose nanocrystals loaded with manganese dioxide.

[0044] Take 80g of manganese dioxide-loaded cellulose nanocrystal suspension, add 2g of nano-titanium dioxide and 10g of sodium alginate, and stir at 40°C. Add 0.1g of sodium dodecylbenzenesulfonate, and continue stirring and foaming for 30min at 10000rpm / min.

[0045] After foaming, it was dripped into Ca with a mass fraction of 15%. 2+ solution, prepared into a hydrogel, and then freeze-dried. Take 100 mg of porous microspheres and add them to 30 ml of m...

Embodiment 2

[0049] The sodium dodecylbenzene sulfonate add-on is 3g, and all the other conditions (such as: raw material type, consumption and technological process etc.) are all the same with embodiment 1.

[0050] The prepared cellulose nanocrystal / nano-manganese dioxide / nano-titanium dioxide / sodium alginate emulsion has large appearance, low density and light brown color. The prepared porous microsphere has a small and compact pore structure, and the pore size distribution is uniform. Using the BET test, the specific surface area is 11m 2 / g, the adsorption capacity to methylene blue is 306.4mg / g, and the degradation rate is 97.9%. The porous microspheres are cyclically regenerated, and after repeated adsorption and degradation ten times, the initial adsorption and degradation performance is still maintained.

Embodiment 3

[0052] The addition amount of sodium alginate is 5g, and all the other conditions (such as: raw material type, consumption and technological process etc.) are all the same with embodiment 1.

[0053] Using the BET test, the specific surface area is 9m 2 / g, the adsorption capacity to methylene blue is 225.4mg / g, and the degradation rate is 87.1%. The porous microspheres are cyclically regenerated, and after repeated adsorption and degradation ten times, the initial adsorption and degradation performance is still maintained.

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Abstract

The invention provides a biomass nanomaterial porous microsphere and a preparation method thereof. The biomass nanomaterial porous microsphere mainly comprises a biomass nanomaterial, nano manganese dioxide, nano titanium dioxide and sodium alginate, has a rich pore structure, and has the pore diameter of 10-600 microns. The microsphere has super-strong capability of adsorbing and degrading cationic dyes, can be regenerated through short-time ultraviolet irradiation, and has the characteristic of reusability.

Description

【Technical field】 [0001] The invention relates to a biomass nanomaterial porous microsphere, in particular to a biomass nanomaterial / nano-manganese dioxide / nano-titanium dioxide porous microsphere and a preparation method thereof, belonging to the field of biomass nanomaterials. 【Background technique】 [0002] Bio-based nanomaterials refer to a new class of nanomaterials prepared by biological, chemical and physical means using renewable substances, including organisms such as green plants and marine animals, and are the most abundant natural biological materials in nature. Cellulose nanocrystals can be obtained by taking out the amorphous region in the cellulose of green plants. Cellulose nanocrystals are rich in functional groups, which can adsorb pollutants and dyes in the water environment. [0003] Metal oxides refer to binary compounds composed of oxygen and another metal chemical element. Metal oxides play an important role in the field of catalysis. They are widely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/34B01J20/30
CPCB01J20/24B01J20/06B01J20/3441B01J20/28047B01J20/28019
Inventor 张建明周立娟宋迎坤李建龙
Owner QINGDAO UNIV OF SCI & TECH
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