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| 由图7曲线可以看出，从温度到达400°C开始，滤纸纤维素的吸收峰发生了明显的变化，一些在到达这个温度之前较强的峰，如C-O,C-H,C-CH2-,-CH2-已经变得很弱或完全消失，说明此时纤维素成份已经分解。温度从400°C到1100°C的变化过程中，在波数为1583cm-1时并没有出现羰基(C=O)基团的吸收峰,这说明醋酸根上的羰基基团在400°C就已经分解完全。温度在400°C到500°C之间时，波数位于438cm-1的锌氧键吸收峰变得较为明显，但强度较弱，将温度提高到600°C时波数位于438cm-1的锌氧键吸收峰显著加强，在加热到700°C以上时吸收峰强度达到顶峰且基本相同，说明400°C到500°C为ZnO的形成过程，在600°C时氧化锌结构已经基本成型，这个锌氧键吸收峰强度的变化说明随着温度的升高，氧化锌基团在逐渐增多。波数在3437cm-1, 1631cm-1的吸收峰是样品含有的水成分。 |
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3楼2009-11-10 16:42:05
toflyfirst
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| Curve can be seen from Figure 7, when the temperature reaches 400 ° C ,the absorption peak of cellulose filter paper significant changes have taken place, some before reaching this temperature a strong peak, such as C-O, C-H, C-CH2-, -- CH2-has become very weak or completely disappeared, indicating that this time cellulose ingredients has been broken down . Temperature from 400 ° C to 1100 ° C process of change, in the wave number of 1583cm-1, has failed to appear carbonyl (C = O) group absorption peaks, indicating thethe acetate group on carbonyl oxygen in the 400 ° C to has broken down completely. Temperature of 400 ° C to between 500 ° C when the wave number at 438cm-1 of zinc-oxygen bond absorption peaks become more obvious, but the strength is weak, the temperature raised to 600 ° C when the wave number at 438cm-1 of zinc oxide bond absorption peak significantly strengthened, in the heated to 700 ° C above the absorption peak intensity reached its peak and is basically the same, indicating 400 ° C to 500 ° C for the formation of ZnO, in the 600 ° C when the zinc oxide structure has basically taken shape, this zinc-oxygen bond absorption peak intensity changes show that as the temperature rises, zinc oxide group is gradually increasing. Wave number in the 3437cm-1, 1631cm-1 absorption peak is the water of samples ingredients |
2楼2009-11-10 14:45:19
4楼2009-11-10 17:27:40
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额。。。。。 |
5楼2009-11-10 17:31:29
