Abstract Black hierarchical porous ZnO was prepared by oxidation of nano-porous Zn/ZnO sample obtained from the Al-Zn alloy etched in an NaOH aqueous solution, and was characterized by XRD, SEM, TEM, BET, EDS and UV-Vis spectrophotometer measurements. The results showed that the ZnO appeared black in the sunlight and its reflectivity was approximately 19.5% in the wavelength range from 370 nm to 700 nm. The Black ZnO sample exhibited a hierarchical porous structure consisting of nanosheets with uniformly distributed mesopores , that gives rise to a high specific surface area of about 36 m2/g. Compared to the ZnO nanopowders and TiO2 (P25), black porous ZnO exhibited excellent photocatalytic activity in the degradation of a methyl orange solution under visible light.

中文翻译：

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黑色分级多孔氧化锌的制备及其可见光下的光催化活性

摘要 通过在 NaOH 水溶液中蚀刻的 Al-Zn 合金获得的纳米多孔 Zn/ZnO 样品氧化制备黑色分级多孔 ZnO，并通过 XRD、SEM、TEM、BET、EDS 和 UV-Vis 分光光度计测量进行表征。 . 结果表明，ZnO 在阳光下呈黑色，在 370 nm 至 700 nm 的波长范围内其反射率约为 19.5%。黑色 ZnO 样品表现出由具有均匀分布的介孔的纳米片组成的分层多孔结构，产生约 36 m2/g 的高比表面积。与 ZnO 纳米粉末和 TiO2 (P25) 相比，黑色多孔 ZnO 在可见光下降解甲基橙溶液中表现出优异的光催化活性。