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研究了二次水热反应条件对钛酸钠转变为二氧化钛纳米针的晶型以及形貌的影响,并对比了不同条件下降解甲基橙的性能。采用TEM,XRD等分析手段,对在不同工艺条件下获得产物的形态和结构进行表征。具体探讨了二次水热反应时间,反应温度,反应体系(加入不同种无机酸),pH值以及搅拌速度速率的影响。结果表明,在150℃,24h就可以获得较好的结晶度,在硝酸体系中,pH=0.5,搅拌转速900r/min时得到的纳米针降解甲基橙的效果较好。
The effect of secondary hydrothermal reaction conditions on the crystal form and morphology of sodium titanate nanosized titanium dioxide was investigated. The performance of methyl orange degrading under different conditions was compared. The morphology and structure of the products obtained under different technological conditions were characterized by TEM, XRD and other analytical methods. The effects of secondary hydrothermal reaction time, reaction temperature, reaction system (adding different inorganic acids), pH value and stirring speed were discussed in detail. The results showed that good crystallinity could be obtained at 150 ℃ for 24h, and the nitrocellulose degrade methyl orange in the nitric acid system at pH = 0.5 and stirring speed of 900 r / min.