静电纺丝
煅烧
光催化
制作
多孔性
光降解
罗丹明B
纳米纤维
赤铁矿
聚乙烯吡咯烷酮
材料科学
化学工程
球体
可见光谱
比表面积
纳米技术
复合材料
化学
高分子化学
催化作用
聚合物
冶金
有机化学
天文
物理
光电子学
替代医学
医学
病理
工程类
作者
Juan Ru Huang,Xiaohe Liu,Gen Chen,Ning Zhang,Renzhi Ma,Guanzhou Qiu
标识
DOI:10.1016/j.solidstatesciences.2018.05.014
摘要
Porous hematite (α-Fe2O3) hollow spheres and nanofibers could be obtained via electrospinning and subsequent thermal decomposition in air. The precursor could be fabricated by electrospinning using Fe(NO3)3 as the iron source and Polyvinylpyrrolidone (PVP) as a complexing reagent. Upon calcination, pure porous α-Fe2O3 hollow spheres and nanofibers could be obtained at 650 °C for 3 h. The novel hollow spheres have an abundantly porous structure as well as large surface areas. Benefitting from the special porous structure, narrow bandgap, and higher surface area, porous α-Fe2O3 hollow materials are used as visible-light-responsive photocatalysts. So we have investigated the visible light photodegradation behavior of porous hematite (α-Fe2O3) hollow spheres and nanofibers towards organic dyes, as Rhodamine B (RhB). The synergetic effects of higher surface area, pore structures promoted the photocatalytic efficiency for RhB degradation under visible light and contributed to achieving the enhanced and stable photocatalytic activity.
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