共沉淀法合成ZnMoO4粉体及其抗菌性能

以Zn(NO₃)₂·6H₂O、(NH₄)₆Mo₇O₂₄·4H₂O为主要原料,采用共沉淀法合成ZnMoO₄粉体。利用XRD、SEM等测试方法对合成样品的物相组成、微观结构进行表征。以培养的大肠杆菌为消杀对象,研究了不同热处理温度下的样品对大肠杆菌的抗菌性能。结果表明,前驱体主要为非晶态,含少量ZnMoO₄、Zn₂Mo₃O₈、Zn(OH)₂和MoO₃;前驱体经400~600 ℃、保温30 min热处理,其产物转化为ZnMoO₄,且随着热处理温度的升高,合成的ZnMoO₄晶型逐渐完善,抗菌性能增加,当热处理温度为600 ℃时,可以获得结晶良好的ZnMoO₄,其晶粒呈颗粒状和片状,平均粒径约为1.5 μm。不同热处理温度合成的ZnMoO₄均具有一定的抗菌性能,其中经600 ℃热处理得到的ZnMoO₄具有最佳抗菌性能,经过24 h抗菌检测,其抗菌率达到99.2%,在商用涂料料浆中外加5%的ZnMoO₄粉体,所制备涂层对大肠杆菌的抗菌率达到95.7%,表明ZnMoO₄及其涂料具有良好的应用前景。

Synthesis of ZnMoO4 Powder by Coprecipitation Method and Its Antibacterial Performance

ZnMoO₄ powder was synthesized by coprecipitation method using Zn(NO₃)₂·6H₂O and (NH₄)₆Mo₇O₂₄·4H₂O as main materials. Phase composition, microstructure of the synthesized samples were characterized by XRD, SEM, and so on. Antibacterial performance of the synthesized samples with different treatment temperatures were studied through Escherichia coli as the killing object. The results show that precursor mainly consists of non-crystalline with a small amount of ZnMoO₄, Zn₂Mo₃O₈, Zn(OH)₂ and MoO₃; the precursor is transferred into ZnMoO₄ when heat treated at 400 ℃ to 600 ℃ for 30 min. With the increase of heat treatment temperature, the crystal structure of ZnMoO₄ is gradually improved, so antibacterial performance of ZnMoO₄ is increased. When the heat treatment temperature is 600 ℃, ZnMoO₄ with good crystallization can be obtained, and particle size of ZnMoO₄ is granular and flake-like with average size of 1.5 μm. The as-synthesized ZnMoO₄ owns better antibacterial performance. Among them, antibacterial performance of ZnMoO₄ synthesized by heat treatment of 600 ℃ is the best, and its antibacterial rate arrives at 99.2% after 24 h antibacterial test. When 5% ZnMoO₄ powder is added into commercial coating slurry, antibacterial rate of the coating reaches 95.7%, which has good application prospects.