制备温度对负载纳米水合氧化锆复合吸附材料结构和性能的影响

Influence of Preparation Temperature on Structure and Properties of Composite Adsorption Material Loaded with Nano-hydrated Zirconium Oxide

采用浸渍-原位沉淀法制备了离子交换树脂负载纳米水合氧化锆(HZrO/D001)复合吸附材料,重点研究制备温度对其结构和性能的影响。采用X荧光(XRF)、扫描电镜(SEM)、傅立叶红外光谱(FTIR)等对材料进行结构表征。结果表明,离子交换树脂表面的负载物质为无定形和四方相HZrO,采用表面活性剂改性后复合吸附材料比表面积增大1.8倍;升高温度可以增大HZrO负载量,制备温度为70℃时,HZrO负载量达到最大值,为23.29%;制备温度升高,HZrO成核增多,粒径减小,复合材料比表面积增大,比表面积高达21.7709 m^2/g;制备温度升高,HZrO结晶度提高,吸附材料对锌离子的吸附能力降低。

In this paper,the ion exchange resin loading nano-hydrated zirconium oxide was prepared by impregnation-in-situ precipitation method and the influence of preparation temperature on the structure and adsorption performance of composite adsorbent(HZrO/D001)was studied.The composite adsorbent was characterized by X-ray fluorescence analysis(XRF),scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR)and so on.Results show that,the loading material on the surface of the ion exchange resin was amorphous and tetragonal hydrated zirconium oxide.The specific surface area of composite adsorbent modified by surfactant is 1.8 times larger than that of untreated composite adsorbent.The content of hydrated zirconium oxide increases with the increase of temperature.At 70℃,the content of zirconium reaches a maximum of 23.29%.The increase of temperature results in the increase of the crystal nuclei of HZrO,the decrease of particle size,and the increase of specific surface area of the composite materials,as high as 21.7709 m^2/g.When the temperature increases,the crystallinity of HZrO increases,resulting in a decrease in the capacity of the material for Zn^2+adsorption.