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利用溶胶-凝胶法合成了4价双金属酸盐-焦磷锆钛(ZTPP),采用扫描电镜(SEM)、傅里叶红外光谱(FT-IR)、比表面积及孔结构分析(BET)、热重-差热分析(TG-DTA)等手段对材料进行了分析和表征,结果表明焦磷锆钛是一种具有发达比表面积的无定形多孔材料,且具有很好的稳定性。吸附实验证明,焦磷锆钛随溶液中铯离子初始浓度增高,吸附容量增大,可达1.4 mmol/g;在不同酸度溶液和竞争阳离子存在的情况下可稳定有效的吸附铯离子,吸附容量稳定;通过调整材料用量,其对铯离子的去除率可接近100%。
The tetravalent bidentate zirconate-titanium (ZTPP) was synthesized by sol-gel method and characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), surface area and pore structure analysis (BET) , Thermogravimetry-differential thermal analysis (TG-DTA) were used to analyze and characterize the materials. The results show that zirconia pyrophosphate is a kind of amorphous porous material with developed specific surface area and has good stability. Adsorption experiments show that the initial concentration of cesium zirconium pyrophosphate increases with the initial concentration of cesium ions in the solution and the adsorption capacity increases up to 1.4 mmol / g. The cesium ions can be adsorbed stably and efficiently in the presence of different acid solutions and competitive cations. The adsorption capacity Stable; by adjusting the amount of material, the removal of cesium ions can be close to 100%.