Chen Xiang, Zhang Feng, Wang Qian, Han Xiao, Li Xin, Liu Jiuyu, Lin Huiming, Qu Fengyu
College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China. qufengyu@ hrbnu.edu.cn
Dalton Trans. 2015 Feb 21;44(7):3034-42. doi: 10.1039/c4dt03382e.
ZnO/SnO2 hetero-nanofibers about 250 nm in diameter and several micrometers in length are synthesized via an electrospun method using zinc chloride and stannous chloride as inorganic sources. All fibers are composed of many nanoparticles (5-10 nm) that induce a highly porous structure as well as high surface area. By adjusting the ratio of zinc/stannous source, the synthesized porous ZnO/SnO2 materials show various structures (corrugated fiber and tube), that are a result of the different oxidation/decomposition temperatures of the two components. Their photodegradation abilities toward various dye wastewaters (methylene blue, congo red, eosin red, and methyl orange) are demonstrated, showing fast photodegradation and good recycling ability. It is noteworthy that ZnO/SnO2 exhibits an enhanced photodegradation ability to congo red, ascribed to the high adsorption capacity derived from the strong electrostatic interaction between ZnO/SnO2 and congo red. Based on the investigation, these porous ZnO/SnO2 hetero-nanofibers possess versatile potential applications for wastewater purification.
以氯化锌和氯化亚锡为无机源，通过静电纺丝法合成了直径约250纳米、长度为几微米的ZnO/SnO₂异质纳米纤维。所有纤维均由许多纳米颗粒（5-10纳米）组成，这些纳米颗粒形成了高度多孔的结构以及高比表面积。通过调整锌/亚锡源的比例，合成的多孔ZnO/SnO₂材料呈现出各种结构（波纹纤维和管），这是两种组分不同氧化/分解温度的结果。展示了它们对各种染料废水（亚甲基蓝、刚果红、曙红和甲基橙）的光降解能力，表现出快速光降解和良好的循环利用能力。值得注意的是，ZnO/SnO₂对刚果红表现出增强的光降解能力，这归因于ZnO/SnO₂与刚果红之间强静电相互作用产生的高吸附容量。基于该研究，这些多孔ZnO/SnO₂异质纳米纤维在废水净化方面具有广泛的潜在应用。
