Research on the Hydrothermal Reaction of Rich-titanium Material in the Low Concentration of Alkali Solution
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摘要: 以富钛料为原料,研究其在NaOH溶液中水热反应的行为,应用Box-Behnken中心组合设计原理和响应面分析法研究了碱浓度、温度、反应时间等条件对TiO2转化率的影响。结果表明:在碱浓度25%、温度186℃、反应时间4 h的条件下,得到的产物转化率最高,并在最优条件下验证了其转化率。采用扫描电子显微镜(SEM)及X-射线衍射仪(XRD)分析了反应产物的形貌及物相表征,表明在不同条件下得到了不同的反应产物,其形貌随着条件的不同逐渐发生改变。Abstract: The hydrothermal reaction behavior of rich-titanium material in the hot Na OH solution was studied in this paper,and the effects of alkali concentration,temperature,reaction time on the conversion rate of TiO2 were investigated by Box-Behnken central composite design and response surface analysis. The results show that the highest product conversion rate can be reached under alkali concentration 25%,temperature 186 ℃ and reaction time 4 hours. The conversion rate of product under optimal conditions was verified. The morphology and phase characterization of reaction products were analyzed by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). Different reaction products were obtained under various conditions,and the morphologies change gradually with different conditions.
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Key words:
- rich-titanium material /
- hydrothermal synthesis /
- TiO2 /
- conversion rate /
- response surface method
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