Fe2O3/Geopolymer 多孔陶瓷的制备与性能研究

Pub Date : 2024-05-22 DOI:10.5755/j02.ms.35956

Zhenfan Chen, Shaofeng Zhu, Qingqing Wang

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摘要

本文采用物理发泡法结合凝胶铸造工艺制备了一种土工聚合物多孔陶瓷。研究了烧结温度对样品相组成和物理性能的影响。通过浸渍-煅烧法在土工聚合物多孔陶瓷样品表面负载 Fe2O3，制备了 Fe2O3/土工聚合物多孔陶瓷样品。利用 SEM-EDS、傅立叶变换红外光谱和 XPS 对负载了 Fe2O3 的土工聚合物多孔陶瓷样品进行了表征。采用吸附实验研究了试验条件对 Pb(NO3)2 溶液中 Pb(Ⅱ)吸附的影响。结果表明，土工聚合物多孔陶瓷样品的孔隙率降低，而抗压强度增加，孔径范围小于 0.1 mm 和 0.1 mm - 0.2 mm 的孔隙比例增加。随着 Fe(NO3)3 溶液浓度、煅烧温度和保温时间的增加，Pb(II)的吸附容量和去除率先增大后减小。Pb(Ⅱ)的吸附容量和去除率随溶液 pH 值和初始 Pb(Ⅱ)浓度的增加而增加。

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Preparation and Performance Study of Fe2O3/Geopolymer Porous Ceramics

In this paper, a kind of geopolymer porous ceramic was prepared using the physical foaming method combined with the gel casting process. The effect of sintering temperature on phase composition and physical properties of samples was studied. Fe2O3/geopolymer porous ceramic samples were prepared by Fe2O3 loaded on the surface of geopolymer porous ceramic samples through the impregnation-calcination method. The Fe2O3-loaded geopolymer porous ceramic samples were characterized by SEM-EDS, FTIR, and XPS. The adsorption experiments were employed to investigate the effect of testing conditions on the adsorption of Pb(Ⅱ) from the Pb(NO3)2 solution. The results show that the porosity of geopolymer porous ceramic samples decreased while the compressive strength increased, and the proportion of pores with a pore size range of < 0.1 mm and 0.1 mm – 0.2 mm increased. The adsorption capacity and removal rate of Pb(II) first increased and then decreased with the increase of Fe(NO3)3 solution concentration, calcination temperature, and holding time. The adsorption capacity and removal rate of Pb(Ⅱ) increased with the increase of the pH value and the initial Pb(II) concentration of the solution.

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