【摘要】 以聚乙二醇(PEG2000)为模板剂,醋酸锌为前驱体,乙醇为溶剂,二乙醇胺为络合剂,通过溶胶-凝胶法在玻璃基片上制备了ZnO多孔薄膜。利用IR、TG-DTA、及SEM等测试方法对薄膜的结构和特性进行了分析。探讨了样品在溶胶-凝胶及煅烧过程中的物理化学变化。研究了前驱体浓度、PEG2000加入量对薄膜结构和性能的影响。结果表明,当Zn2+的浓度为0.6 mol/L时,加入PEG2000后,有利于ZnO多孔结构的形成,而且孔尺寸及密度也随PEG加入量的增大而增大。随孔尺寸的增大,ZnO粉末的比表面积先增加后下降,薄膜的紫外—可见光透射率随着孔径提高而降低。更多还原

【Abstract】 ZnO porous films were prepared on glass substrates by sol-gel method using polyethylene glycol as organic template,Zn(CH3COO)2·2H2O as precursor,ethanol as solvent and NH(C2H2OH)2 as chelating agent.The characteristics and microstructure of films were analyzed by IR,TG-DTA and SEM.The effects of precursor concentration and PEG content on the characteristic of films were discussed.The results showed that porous thin films could be prepared by addition of PEG,pore size and density increased with the addition of PEG,when Zn2+ concentration reached 0.6 mol·L-1.With pore size increasing,BET surface area of the ZnO powder increased and then decreased.The transmittance spectrum of the ZnO film in UV-VIS decreased with the increase of pore size.更多还原