高温水热法合成系列介孔氧化铝负载铂催化剂及其对苯的催化燃烧性能

摘要

Stable crystalline mesoporous Al2 O3 (M-Al2 O3-n)supporting Pt with good catalytic activity for benzene combustion have been successfully prepared.M-Al2 O3-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-Al2 O3-ns are highly crystalline withγ-Al2 O3 character.N2 isotherms and pore size distribution show that M-Al2 O3-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-Al2 O3-ns have rough surface and abundant mesopores.Catalytic tests show that M-Al2 O3-ns exhibit excellent activity for benzene combustion under rather mild conditions.%采用高温水热法制备稳定、高度晶化的介孔氧化铝材料(M-Al2 O3-n)，通过异丙醇铝前驱体与聚四乙烯基吡啶(P4VP)模板间的酸碱自组装实现材料介孔结构的构筑，再经高温水热处理(180℃)实现孔壁的晶化，并通过担载少量的铂活性组分研究其在催化完全燃烧苯中的性能.结果表明：M-Al2 O3-n具有高度晶化的孔壁结构和典型的γ-Al2 O3晶型；M-Al2 O3-n具有较大的比表面积(335 m2/g)、孔容(1.36 cm3/g)和均一的孔径分布(16.1 nm)；M-Al2 O3-n具有粗糙的表面结构及丰富的纳米多孔结构；该材料负载少量的铂(质量分数为0.3%)活性组分得到的新型催化材料在较温和的条件下即可将苯类VOCs完全催化燃烧.