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吸附剂是一种能够有效地从气体或液体中吸附某些成分的固体物质。其基本原理包括物理吸附和化学吸附两种类型。 ?物理吸附?:物理吸附是基于固体表面的原子或基团与外来分子间的吸附力(如范德华力、静电作用力)实现的。这种吸附力较弱,吸附热较小,被吸附的气体或液体容易解脱,且不发生性质上的变化。物理吸附是可逆过程?。 ?化学吸附?:化学吸附是在固体表面发生化学反应,使吸附质和吸附剂之间以化学键力结合。这种吸附力较强,吸附热较大,通常只能形成单分子层且不可逆。化学吸附的选择性较强,但速度较慢?。
如何从红外光谱上来区分一个吸附过程中物理吸附还是化学吸附?对吸附本身而言,是不是只有波数产生变化的吸附就一定是物理吸附,而不能定义为化学吸附.而峰的增加或消失就是化学吸附?
[img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433173704_7895_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433182045_860_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433187522_4094_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433195792_6136_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433206002_3229_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433220399_1739_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433228560_6868_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241433234592_7032_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435023422_4656_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435037251_8321_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435047702_4459_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435057153_6344_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435064532_3577_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435072882_3559_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435085602_3528_3904283_3.jpg!w690x517.jpg[/img][img=物理吸附测试仪,690,517]https://ng1.17img.cn/bbsfiles/images/2020/02/202002241435095062_2431_3904283_3.jpg!w690x517.jpg[/img]