摘要
对采用水热合成法制备的TiO2/碳纳米管复合材料,进行了氧化热失重和动力学分析。考察了升温速率和TiO2负载量对于热失重(TG)和差示扫描(DSC)曲线的影响。结果表明,升温速率的增加会使TG和DSC曲线向高温区稍有偏移,而TiO2负载量的增加会使TG和DSC曲线向低温区明显偏移,但两者对TiO2/碳纳米管复合材料的最终转化率并无影响。采用Kissinger和Ozawa非等温法进行了氧化热失重反应的拟合,得到了十分相近的表观活化能和频率因子,线性回归系数R2均在0.99以上,拟合效果较为理想。
Oxidation thermogravimetric properties were analyzed on titanium dioxide/carbon nanotubes （TiO2/CNTs） composites prepared through the hydrothermal method. The effects of heating rates and TiO2 coated quantity were investigated. It was revealed that higher heating rate made thermogravimetric （TG） and differential scanning calorimetric （DSC） curves move to the area with higher temperature, while the higher TiO2 coated quantity was on the contrary. However, the maximum weight losses were almost not affected by heating rates and TiO2 coated quantity. Thermogravimetdc dynamic parameters （Ea, lnA） of TiO2/CNTs were obtained through the Kissinger and Ozawa method. The regression coefficient R2 were over 0.99 which indicated good fitting results.
出处
《上海第二工业大学学报》
2012年第2期98-104,共7页
Journal of Shanghai Polytechnic University
基金
上海高校青年教师培养资助计划(No.egd11008)
上海第二工业大学校基金(No.A20XK11X018)
