利用溶胶-凝胶法在La Ni O3/Si O2/Si衬底上制备了掺Mn量为0%、1%、5%、10%（质量分数）的0.7Bi Fe O3-0.3Pb Ti O3（BFMPT7030/x,x=0,0.01,0.05,0.1）薄膜。XRD测试表明,薄膜均完全结晶,呈现高度（100）择优取向。通过对薄膜晶体结构分析,发现BFMPT7030/0.05薄膜具有最小的晶粒尺寸（258 nm）及最小的晶胞体积（61.25×10-3 nm3）。SEM测试结果显示样品晶粒生长充分,晶粒尺寸在150~300 nm之间。铁电性能测试结果表明,当Mn含量为5%时,铁电性能较好,电滞回线形状最好,最为饱和。漏电流测试结果表明随着掺Mn量增加,BFMPT7030薄膜的漏电流随电场增大而增加的趋势减弱。
Hierarchical Ag/Bi2WO6 nanomaterials were prepared by a facile one-step hydrothermal method in mixed acetic acid and ethylene glycol (EG) medium. EG is employed as mild reducing agent for the formation of metallic Ag from Ag+ precursors. In situ energy dispersive X-ray diffraction (EDXRD) monitoring showed that the hydrothermal formation kinetics of Bi2WO6 in the presence of EG was significantly slowed down due to its very high viscosity. The photocatalytic activities of Ag/Bi2WO6 composites were evaluated by the photodegradation of methylene blue (MB) under visible light irradiation. The photocatalytic activity of Bi2WO6 is strongly influenced by the Ag loading. The enhanced catalytic activity of the composites is based on the cooperative effects of plasmon absorption band and separation of photogenerated electron-hole pairs.
ZHOU YingZHANG QianLIN YuanHuaANTONOVA ElenaBENSCH WolfgangPATZKE Greta R.
