Abstract
AbstractOrdered hexagonal mesoporous aluminosilicate matrix (Al‐MCM‐41) with incorporated ammonium molybdophosphate (AMP) was successfully synthesized by a one‐pot synthesis method with natural clay from low‐grade potash ores of Qinghai salt lake as the silica and aluminum source. We introduced a modified “liquid‐phase transport” step, which allowed the use of impure natural clay as a starting material to directly produce pure product without sedimentation pretreatment. The resultant product was characterized by X‐ray fluorescence (XRF) spectroscopy, FTIR spectroscopy, XRD, TEM, 27Al and 31P magic‐angle spinning (MAS) NMR spectroscopy, and N2 adsorption/desorption, which indicated that the AMP was immobilized in the mesoporous structure of Al‐MCM‐41. The adsorption capacity of the final product for the removal of cesium ions in solution was also investigated. The results suggested that salt lake clay is a promising low‐cost precursor for the production of mesoporous aluminosilicate supports through one‐pot syntheses, and the final composite material is effective for the adsorption of cesium ions from solutions containing other alkali metal ions.
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