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以溶胶-凝胶法制备法制备了凹凸棒石黏土负载纳米TiO2吸附剂,采用FT-IR、SEM、XRD等分析方法对凹凸棒石黏土负载纳米TiO2前后的结构进行了表征。并对Ni(II)进行了吸附机理和性能的研究。结果表明:经过高温焙烧后的凹凸棒石黏土负载纳米TiO2吸附剂较负载前的凹凸棒石黏土,因其结构中的结晶水和沸石水脱失,内部孔道面积和表面积增加,活性吸附位点的数量增大,吸附能力有了明显提高。在室温条件下(20~25℃),pH为6~7,吸附平衡时间为120min时,凹凸棒石黏土负载纳米TiO2吸附剂对Ni(II)有较好的吸附效果。
The attapulgite clay loaded nano-TiO2 was prepared by sol-gel method. The structure of the attapulgite clay loaded nano-TiO2 was characterized by FT-IR, SEM and XRD. Ni (II) adsorption mechanism and performance of the study. The results show that the attapulgite clay-loaded nano-TiO2 adsorbent after calcination at high temperature is superior to the attapulgite clay before loading due to the loss of crystal water and zeolite water in the structure and the increase of the internal pore area and surface area. The active adsorption sites The number increases, the adsorption capacity has been significantly improved. The attapulgite clay loaded nano-TiO2 adsorbent has better adsorption effect on Ni (II) at room temperature (20-25 ℃), pH 6-7 and adsorption equilibrium time 120min.