Preparation of activated carbon (AC)-loaded TiO2 adsorbent

Preparation of activated carbon (AC)-loaded TiO2 adsorbent
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负载活性炭(AC)的TiO2吸附剂的制备

DOI:
10.1007/s12598-011-0272-y
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发表时间:
2011-11
期刊:
影响因子:
8.8
通讯作者:
Jing Chuanyong
Jing Chuanyong
中科院分区:
材料科学1区
文献类型:
--
作者:
Cao Linhong;Xie Dongmei;Qu Yufeng;Jing Chuanyong

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二氧化钛是一种有效的饮用水除砷吸附剂。使用三种不同的方法:以硫酸氧钛(TiOSO 4)和活性炭为原料,采用TiO 2溶胶-凝胶法制备了TiO 2/AC复合吸附剂。利用XRD和SEM对吸附剂的物相组成和形貌进行了表征。根据TiOSO 4的TG/DTA结果,很容易看出,在400 °C以下没有TiO 2晶相出现,在400-700 °C时只能发现TiO 2晶相。SO 42-的存在抑制了金红石向金红石的转化。以TiO 2为前驱体和TiO 2溶胶-凝胶为载体,在400 °C焙烧时,活性炭表面负载的TiO 2为锐钛矿相。同时,采用溶胶-凝胶法制备的TiO 2在活性炭表面的分布更均匀,固定化程度更高。
Titanium dioxide is an effective adsorbent on the removal of arsenic from drinking water. Using three different methods: (a) directly using TiOSO4 solution, (b) using the precursor of TiO2, (c) using TiO2 sol-gel, one composite adsorbent was synthesized by loading titanium dioxide on activated carbon (TiO2/AC) with titanyl sulfate (TiOSO4) and activated carbon as raw materials. The phase compositions and morphology of the adsorbent were characterized by using XRD and SEM. According to the TG/DTA results of TiOSO4, it is easy to see that there is no TiO2 crystalline phase appears below 400 °C, and only anatase phase can be found at 400–700 °C. The presence of SO42− restrained the transformation of anatase to rutile. The TiO2 loading on the AC surface is anatase phase by using the precursor of TiO2 and TiO2 sol-gel, when the calcination temperature is 400 °C. At the same time, the distribution of TiO2 is more uniform and immobilized on the AC surface by using TiO2 sol-gel than using other two methods.
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