温度对ZnO／Ag纳米复合抗菌剂前驱体及产物的影响规律研究

The effect of temperature on the precursor and sintering-product of ZnO/Ag nano-composite antimicrobial

以硫酸锌、硝酸银为原料，碳酸氢氨为沉淀剂制备出高纯度ZnO／Ag纳米复合抗菌剂。重点研究了合成温度及煅烧温度对前驱体微观形貌及最终产物的结构、成份、形貌的影响规律。用TEM、XRD、TG-DTG对前驱体和ZnO／Ag纳米复合抗菌剂进行了表征，结果表明：随着合成温度的升高，前驱体产物的形态由线棒状逐渐变为球团状，并且由非晶态逐渐转化为晶态；450℃煅烧所得复合粉体由六方纤锌矿纳米ZnO和立方结构纳米Ag组成，粒径集中在15nm左右，粒子大小均匀，分散性良好；经权威机构检测本抗菌剂抗菌性能优异。

The ZnO/Ag Nano-composite antimicrobials were synthesized by a precipitation method with ZnSO4 and AgNO3 as the starting material and NH4HCO3 as the precipitant. This paper emphasized to study the effect of the reaction temperature and sintering temperature on the precursor and products of ZnO/Ag nano-composite antimicrobial. The ZnO/Ag nano-composite antimicrobial and its precursor were characterized by TEM, XRD, TG-DTG, TEM micrographs show that the shapes of precursor were changed from wire to sphere and its structure transformed from noncrystallinity to crystallinity follow the reaction temperature rising. XRD pattern of the powder indicates that the hexagonal wurtzite ZnO nanocrystals and cube Ag nanocrystals can be obtained when the precursor calcinated at 450℃, the average particle size is about 15nm, and the nanoparticles are well uniform and dispersed. The appraisal of the antibacterial property for the ZnO/Ag nanocomposite antimicrobial was performed by the authority organization, and its antibacterial properties is proved outstanding.