纳米磷钨酸银光催化剂的微波固相合成  

Solid state synthesis of Ag_3PW_(12)O_(40) photocatalytic nanoparticles under microwave lrradiation

作　　者：邓谦[1] 周文辉[1] 彭振山[1] 岳明[1] 李颖[1] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2005年第3期67-70,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：湖南省自然科学基金项目(编号:01jjy2014);湖南省教育厅科研项目(编号:03C553)

摘　　要：首次应用微波辐射以H3PW12O40和AgNO3为原料,固相反应合成出Ag3PW12O40.12H2O纳米微粒;用FT-IR、UV-vis、TG-DTA确定产物的组成和结构;SEM和BET对产物的形貌、晶粒尺寸和比表面积进行了表征;结果表明,产物为纳米粒子,平均粒径为40 nm,比表面积为179.6938 m2.g-1.在固相反应中,结晶水能形成无数微小的反应水池,限制了产物粒子的晶粒尺寸大小,在微波的磁场和电场作用下,Ag+有序定向的扩散到[PW12O40]3-的外表面,由于微波有极强的穿透力,对样品是内外一起加热,物体快速均匀地升温,从而使游离的H2O、NO2和CO2瞬间同时均匀的挥发出来,溢出的气流阻止了Ag3PW12O40.12H2O颗粒间的团聚.图4,参9.Ag3PW12O40 nanoparticles were synthesized by the solid state reaction of H3PW12O40 with AgNO3 under Microwave Irradiation. Its structure, particle size and appearance were characterized with IR, UV -Vis, SEM, BET and TG - DTA techniques. The results show that Ag3PW12O40 nanoparticles are found to exhibit Keggin structure and the size is about 40nm, the surface area is 179.693 8 m^2 · g^-1. In this solid -phase reaction, the crystallization hydro forms the innumerable small reactor which limited the granule crystal grain size. In microwave magnetic field and under electric field function, Ag^ ＋ sequence heamd surfasen of [ PW12O40 ] 3. As a result of microwave greatly strengthened penetrating power, heats up to the sample when is inside and outside heats up together, The object fast evenly elevates temperature, Thus causes H2 O , NO2 and CO2 instantaneous at the sametime even volatility which drifts away, the overflow air current has prevented Ag3PW12O40 · 12H2O intergranular reunion. 4figs. ,9refs.

关 键 词：多金属氧酸酸盐 纳米 微波 固相合成 光催化剂 微波固相合成 纳米微粒 磷钨酸 固相反应合成 UV-VIS 

分 类 号：O643.36[理学—物理化学] TS202.3[理学—化学]