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NiO/TiO2异质结构纳米管阵列膜对不锈钢的光生阴极保护及其储能性能(英文)
Authors
宋光铃
官自超
+5 more
杜荣归
梁燕
王霞
谭凯
金飘
Publication date
11 October 2019
Publisher
Abstract
本工作通过修饰TiO2制备半导体复合膜,提高其光吸收和光电化学性能,以期应用于光生阴极保护。先采用阳极氧化法在Ti表面制备TiO2纳米管阵列膜,再应用水热处理法在膜表面沉积NiO纳米颗粒,形成具有异质结构纳米管复合膜。利用扫描电子显微镜、X-射线衍射、X-射线光电子能谱、紫外-可见吸收光谱、光致发光谱和光电化学技术对制备的纳米膜进行表征。结果表明,与纯TiO2纳米管膜比较,NiO/TiO2纳米管复合膜的光吸收扩展到可见光区。白光照射下,其在0.5 mol·L-1 KOH和1 mol·L-1 CH3OH混合液中的光电流密度达到176 μA·cm-2,是纯TiO2纳米管膜的2倍。复合膜具有良好的光生阴极保护作用,与0.5 mol·L-1 NaCl溶液中的403不锈钢耦连后,可使其电极电位下降440 mV,在光照2.5 h再转为暗态后,因具有电荷储存能力还可继续提供约15.5 h的阴极保护效应。国家自然科学基金(21573182, 51731008, 51671163, 21621091)资助项
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Last time updated on 20/11/2020