论文部分内容阅读
用钛酸四正丁酯为原料,通过溶胶凝胶法制取具有较高光催化性能的钨、氮掺杂二氧化钛。然后采用氨气鼓泡法将制备好的二氧化钛与氯化镁溶液混合后通入氨气,加热搅拌,最终得到氢氧化镁-氧化钛复合材料。通过XRD、SEM、XPS、FT-IR等表征方法,对所得到的Mg(OH)2/Ti O2多功能复合材料的性质进行研究。结果表明:该复合材料粒度分布宽度为5.5200μm,D50等于7.1800μm,产品为分散均匀、形貌规则,表面附着有微型球状二氧化钛颗粒的六方片状粉体。氢氧化镁所附着的球形二氧化钛颗粒为锐钛矿型,复合材料中氢氧化镁和二氧化钛间存在Mg-O-Ti化学键作用。在300~400℃的分解失重为24.5%,最强吸热温度为387.1℃,符合氢氧化镁阻燃剂的技术指标要求。同时采用震荡烧瓶法对复合材料的抗菌性能进行测试,结果震荡烧瓶法测得其对大肠杆菌的灭菌率120 min时达到83.7%。
Using tetra-n-butyl titanate as raw material, tungsten and nitrogen-doped titanium dioxide with high photocatalytic property was prepared by sol-gel method. Then using ammonia bubbling method, the prepared titanium dioxide and magnesium chloride solution are mixed, ammonia gas is introduced, and the mixture is heated and stirred to finally obtain the magnesium hydroxide-titanium oxide composite material. The properties of Mg (OH) 2 / Ti O2 multifunctional composites were studied by XRD, SEM, XPS and FT-IR. The results show that the composite has a particle size distribution of 5.5200 μm and a D50 of 7.1800 μm. The product is hexagonal plate-like powder with uniformly dispersed particles and regular surface morphology with micro-spherical titanium dioxide particles attached on the surface. The spherical particles of titanium dioxide attached to the magnesium hydroxide are anatase-type, and Mg-O-Ti chemical bonds exist between the magnesium hydroxide and the titanium dioxide in the composite material. At 300-400 ℃, the decomposition weight loss was 24.5%. The strongest endothermic temperature was 387.1 ℃, which met the technical requirements of magnesium hydroxide flame retardant. At the same time, the antibacterial property of the composite was tested by shock flask method. As a result, the sterilization rate of E.coli reached 83.7% at 120 min by shaking flask method.