APPLICATION OF PERIODIC MESOPOROUS SILICAS TO THE SELECTIVE ADSORPTION OF HIGH EXPLOSIVES

摘要

The ammonium perchlorate oxidation (AP-HNO_3) is used to treat as-made mesoporous silicas, resulting template-free mesoporous silicas. Structural characterizations are systematically provided by XRD, TEM, N_2 adsorption, element analysis, and FT-IR. The adsorption investigations of explosives, including TNT, RDX, HMX, and CL-20, are operated from aqueous solution. The mesoporous silica SBA-15 after treated with AP-HNO_3 (N-SBA-15) shows high selectivity and adsorption capacity to HMX (4.7μmol/g), and can be used as a preconcentrating material for its selective adsorption. Therefore N-SBA-15 has the potential to be applied for the separation and detection of HMX.