Preparation method of nanometer zinc oxide-bamboo charcoal composite particle with antibacterial and adsorption functions

A technology of nano-zinc oxide and composite particles, applied in chemical instruments and methods, botanical equipment and methods, nanotechnology for materials and surface science, etc., can solve the unutilized strong adsorption function, the combination of zinc oxide and bamboo charcoal particles Insufficient strength and other problems, to achieve the effect of shortening the preparation cycle, easy to adjust the size, and wide application prospects

Active Publication Date: 2014-01-29
ZHEJIANG SCI-TECH UNIV +1
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Problems solved by technology

In this method, bamboo charcoal pretreated by sodium hydroxide is used as a template, and a mixture of zinc acetate and oxalic acid is used as a raw material, reacted at room temperature for 24 hours, dried and calcined at 800°C for 7 hours to obtain micron-sized nano-zinc oxide rods (Gong L, Jiang H, Zhu FH. A facile and green approach for the fabrication of ZnO nanorods using bamboo charcoal as the template. Materials Letters 2010; 64: 2582–2584), the diameter of the obtained ZnO nanorods is about 300 nm , the length can reach several microns, but this method only uses the template effect of the bambo

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  • Preparation method of nanometer zinc oxide-bamboo charcoal composite particle with antibacterial and adsorption functions

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Embodiment 1

[0024] Red shell bamboo was added to the mixed acid solution of oxalic acid and hydrochloric acid, wherein the solid-liquid ratio of red shell bamboo and mixed acid solution was 1:60 g / mL, and oxalic acid (4 mol / L) and hydrochloric acid (7 mol / L) with a volume ratio of 7:1, the mixed solution was reacted at 80°C for 14 hours, and after the reaction was completed, the reaction product was neutralized with sodium hydroxide to obtain carboxylated bamboo cellulose nanocrystals; the carboxylated The bamboo cellulose nanocrystal liquid added in the zinc chloride solution of 3mol / L, wherein the solid-liquid ratio of the bamboo cellulose nanocrystal of carboxylation and zinc chloride solution is 1:50 g / mL, with sodium hydroxide in proportion Neutralize, dilute the reaction product with deionized water, centrifuge several times to remove inorganic ions, then freeze-dry the dispersion, and then vacuum calcinate at 300°C for 4 hours to obtain nano-zinc oxide-bamboo charcoal composite part...

Embodiment 2

[0026] Add moso bamboo into the mixed acid solution of oxalic acid and sulfuric acid, the solid-liquid ratio of moso bamboo to the mixed acid solution is 1:40 g / mL, and the volume ratio of oxalic acid (3 mol / L) to sulfuric acid (10 mol / L) in the mixed acid solution is 8 : 1, the mixed solution was reacted at 85 ℃ for 10 h, and after the reaction was finished, the reaction product was neutralized with ammonia water to obtain carboxylated bamboo cellulose nanocrystals; adding 0.01mol of carboxylated bamboo cellulose nanocrystals / L of zinc sulfate solution, wherein the solid-liquid ratio of carboxylated bamboo cellulose nanocrystals and zinc sulfate solution is 1:100 g / mL, neutralize with ammonia water in proportion, dilute the reaction product with deionized water, and centrifuge several times Remove the inorganic ions, freeze-dry the dispersion, and then calcinate in vacuum at 400°C for 3 h to obtain nano-zinc oxide-bamboo charcoal composite particles. After the material is tes...

Embodiment 3

[0028] Add bamboo to the mixed acid solution of tartaric acid and sulfuric acid, where the solid-to-liquid ratio of bamboo to the mixed acid solution is 1:50 g / mL, and the volume ratio of tartaric acid (4mol / L) to sulfuric acid (9 mol / L) in the mixed acid solution 10:1, the mixed solution was reacted at 90 °C for 10 h, and after the reaction was completed, the reaction product was neutralized with potassium hydroxide to neutralize to obtain carboxylated bamboo cellulose nanocrystals; the carboxylated bamboo cellulose nanocrystals solution was added to 0.05mol / L zinc sulfate solution, wherein the solid-liquid ratio of carboxylated bamboo cellulose nanocrystals to zinc sulfate solution was 1:80 g / mL, neutralized with potassium hydroxide in proportion, and diluted with deionized water The reaction product was centrifuged several times to remove inorganic ions, then the dispersion was freeze-dried, and then vacuum-calcined at 500°C for 2 hours to obtain nano-zinc oxide-bamboo charc...

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Abstract

The invention relates to a preparation method of nanometer zinc oxide-bamboo charcoal composite particle with antibacterial and adsorption functions. The preparation method comprises the following steps: (1) adding a bamboo raw material into a mixed acid solution, reacting at 50-90 DEG C for 1-20 hours, adding alkali liquor to neutralize the solution after the reaction to obtain a carboxylated bamboo cellulose nanocrystals; (2) adding the carboxylated bamboo cellulose nanocrystals into a solution of 0.005-5 mol/L zinc ions, adding alkali liquor to neutralize, diluting the reaction product through deionized water, centrifuging and freeze drying or vacuum drying the reaction product, and then, vacuum calcining the reaction product at 200-600 DEG C for 1-8 hours to obtain the nanometer zinc oxide-bamboo charcoal composite particle. The process disclosed by the invention is simple, convenient, easy to operate and free of environmental pollution, and the preparation period of the composite particle is shortened; the prepared nanometer zinc oxide-bamboo charcoal composite particle is small in size, easy to regulate and control and large in specific surface area, the bamboo charcoal is very firmly combined with the nanometer zinc oxide, so that the antibacterial effect is durable, and the nanometer zinc oxide-bamboo charcoal composite particle has good adsorption capacity on toxic substance, thereby having a wide application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of functional nanoparticles, in particular to a method for preparing nano zinc oxide-bamboo charcoal composite particles with antibacterial and adsorption functions. Background technique [0002] Zinc oxide is a regular hexagonal wurtzite polar crystal structure, which has the advantages of good stability, no discoloration under high temperature, no decomposition, low price, and abundant resources. In particular, nano-zinc oxide has small size, large specific surface area, quantum size effect, surface effect, volume effect and macroscopic tunnel effect, etc. Compared with ordinary zinc oxide, it shows many advantages, such as antibacterial, ultraviolet scattering, non-toxic, Corrosion resistance, etc., can be used in cosmetics, sunscreens, food packaging materials and other fields (CN1161279C; CN1296041A; CN101214993B). Bamboo charcoal is the main product of thermal decomposition of bamboo. It has a we...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01P1/00B01J20/20B01J20/30B82Y30/00
Inventor 余厚咏姚菊明马廷方孙斌刘琳周劲锋陈伟栋
Owner ZHEJIANG SCI-TECH UNIV
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