One-step direct synthesis of mesoporous AMP/SBA-15 using PMA as acid media and its use in cesium ion removal

Abstract

Mesoporous ammonium molybdophosphate/SBA-15 (AMP/SBA-15) was considered as an excellent adsorbent to remove Cs+ from radioactive wastewater. However, AMP/SBA-15 obtained from two-step method suffers from poor stability and low reuse ability. Herein, we reported a facile one-step method to fabricate AMP/SBA-15 using Phosphomolybdic acid (PMA) as acid media. The effect of PMA content on the properties of the resultant AMP/SBA-15 was investigated in detail. And the Cs+ adsorption performance of the developed AMP/SBA-15 adsorbents was also evaluated. It was found that the PMA content had a strong influence on the structure and morphology of AMP/SBA-15. The mesoporous structure order of the AMP/SBA-15 decreased with increasing PMA content. The AMP particles were mainly incorporated into the framework of SBA-15. Furthermore, the AMP incorporation rate obtained from one-step method is much higher than that of two-step method. The developed AMP/SBA-15 with AMP in the framework of SBA-15 exhibited good stability and high reuse ability for the removal of Cs+.