关键词: 高温合成, 自组装, 介孔材料, 易挥发性有机物, 晶体孔壁

Abstract:

Stable crystalline mesoporous Al₂O₃ (M-Al₂O₃-n) supporting Pt with good catalytic activity for benzene combustion have been successfully prepared. M-Al₂O_3-ns support was synthesized from the self assembly of Al precursor with poly 4vinylpyridine (P4VP) template based on their strong acidbase interactions, followed by hydrothermal treatment at 180 ℃ and calcination at 550 ℃.  XRD patterns show that M-Al₂O₃-ns are highly crystalline  with
γ-Al₂O₃ character. N2 isotherms and pore size distribution show that M-Al₂O₃-ns have a high BET surface area (335 m²/g), large pore volume (1.36 cm³/g) and uniform mesopores (16.1 nm). SEM images show that M-Al₂O₃-ns have rough surface  and abundant mesopores. Catalytic tests show that M-Al₂O₃-ns exhibit  excellent activity for benzene combustion under rather mild conditions.

Key words: high temperature synthesis, selfassembly, mesoporous material, volatile organic compounds (VOCs), crystalline pore walls