A kind of preparation method of loaded silver nano particle macroporous material

Abstract

The invention discloses a method for preparing a macroporous material loaded with silver nanoparticles. The macroporous hydroxyapatite is synthesized by using cuttlefish bone as a template agent and adding a certain amount of phosphate, wherein the molar number of calcium ion and phosphate ion is more than The ratio is 1:1-3, and the macroporous hydroxyapatite is used as a carrier to soak in silver nitrate solution, and finally sintered at high temperature to load silver nanoparticles on it. The present invention realizes the effective control of particle size and dispersibility of silver nanoparticles, and obtains a silver nanoparticle-loaded macroporous material with uniform particle size and good dispersibility. The material has a massive macroporous structure and has a large surface area. It has strong adsorption and carrying capacity. Due to the large specific surface, especially the loading of nano-silver particles, this product has broad application prospects in the fields of catalysts and antibacterial materials. The preparation process of the invention is simple, the cost is low, and the investment in equipment is small. , suitable for mass production.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a preparation method of a macroporous material loaded with silver nanoparticles. Background technique [0002] Porous materials are widely used in the fields of adsorbents, heterogeneous catalysts, various supports and ion exchangers due to their open structure and huge surface area (inner and outer surfaces) that enhance their catalytic and adsorption capabilities. Macroporous materials are porous materials with a pore size larger than 50nm. Due to their large pore size and specific surface area, they have been widely used in catalyst supports, chromatographic supports, and separation materials. In addition, ordered macroporous materials with apertures in the range of light wavelengths have unique optical and other properties. [0003] Nanoparticles have attracted widespread attention, not only because of the reduction in size, but more importantly, the changes in ...

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Problems solved by technology

Scholars have done a lot of research on the preparation of loaded nano-silver particles. For example, Lin Changjian et al. used a combination of sol-gel and hydrothermal treatment to prepare titanium dioxide nanotubes and TiO 2 Nanobelts loaded with silver nanoparticles (Lin Changjian, Chen Yicong, Zhuang Huifang, etc., the method of nano-titanium dioxide loaded silver nanoparticles, application number / patent number 200510126613), can be used in different TiO 2 Ag nanoparticles loaded in nanostructures, but TiO 2 The cost is too high to be suitable for large-scale production; Inventions such as Wang Xin disclose a kind of graphite oxide of loaded nano-metal silver particles and preparation method thereof (Wang Xin, Xu Chao, Zhu Junwu, etc., the graphite oxide and the preparation method thereof of loaded nano-metal silver particles Its preparation method, application number / patent number 200710135561), but this method preparation process is more complicated; He Junhui etc. obtain the silver nanoparticle (He Junhui, Zhu Chunyang, In-situ preparation method of silver nanoparticles loaded on natural cellulose sheet, application number / patent number 200810116208), the method is low in cost and simple in process, but the thermal stability of natural cellulose sheet is poor, so it is not suitable for high temperature application

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