TiO_2/Mg(OH)_2新型抗菌阻燃复合材料的研究

Research on New Antibacterial Flame Retardant TiO_2/Mg(OH)_2 Composite Material

采用氨气鼓泡法制备TiO2/Mg(OH)2多功能复合材料,其中以钛酸正丁酯为前躯体,硝酸铵和九水硝酸铁为氮、铁掺杂源,利用水热法制备了氮、铁共掺杂TiO2粉体。通过XRD、FE-SEM、FT-IR、TG等手段对所制备样品进行了表征,结果表明:75℃条件下,通氨时间为1 h,产品粒度分散均匀,二次粒径为0.69μm;产品形貌为六方片状;其(001)面与(101)面特征衍射峰的强度比值I001/I101为0.71;在322～396℃的分解失重为24.9%,最高吸热温度为376.2℃,技术指标符合氢氧化镁阻燃剂的使用要求;对罗丹明b溶液的光降解率为56.3%。

A new TiO2/Mg（OH）2 multifunctional composite material was prepared by ammonia bubbling process.Nitrogen and iron codoped TiO2 powder were obtained by the hydrothermal method using titanium tetrabutoxide as precursor and ammonium nitrate and Iron（Ⅲ） nitrate nonahydrate as nitrogen and iron source.The composite material was characterized by XRD,FE-SEM,FT-IR and TG.The results indicate that at 75 ℃,the particle size distribute uniformly（D50=0.69 μm） with ammonia feeding time for 1h.SEM analysis shows that the flake-like hexagonal product is of good dispersibility.XRD analysis indicates that it’s I（001）/I（101）=0.71.TG-DTA analysis indicates that the water loss was 24.9% of the total weight between 322 ℃ and 396 ℃ with the highest endothermic temperature at 376.2 ℃.The quality of samples could satisfy the demand of flame retardants.The photodegradation rate of the Rhodamine b is 56.3%.