Ma Shuai-Shuai, Xu Peng, Cai Zhi-Lan, Li Qing, Ye Zhao-Lian, Zhou Yu-Ming
College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China.
J Nanosci Nanotechnol. 2018 Jul 1;18(7):5113-5118. doi: 10.1166/jnn.2018.15312.
One-dimensional (1D) semiconductor ZnO nanowires have been successfully synthesized by a novel soft-chemical hydrothermal method with allylpolyethoxy amino carboxylate (AA-APEA) at low temperature. Their structure and properties have been characterized by a series of techniques, including X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX) and transmission electron microscopy (TEM). It was found that ZnO nanowires with diameters around 50 nm and lengths up to about several micrometers are well-distributed. The photocatalytic activity toward degradation of methylene blue (MB) aqueous solution under ultraviolet (UV) was investigated and the results showed that the ZnO nanowires exhibit a markedly higher photoactivity compared to the ZnO nanoparticles which were obtained without AA-APEA polymer assistant, and it can be ascribed to the special 1D morphology of the ZnO nanowires. In particular, the rate of degradation of the ZnO nanowires was 11 times faster than that of ZnO nanoparticles. In addition, the ZnO nanowires could be easily recycled in UV photocatalytic activity. These observations could promote new applications of photocatalyst for wastewater treatment utilizing oxide semiconductor nanostructures.
采用新型软化学水热法，以烯丙基聚乙氧基氨基羧酸盐（AA - APEA）在低温下成功合成了一维（1D）半导体氧化锌纳米线。通过一系列技术对其结构和性能进行了表征，包括X射线衍射（XRD）、能量色散X射线分析（EDX）和透射电子显微镜（TEM）。结果发现，直径约50 nm、长度达几微米的氧化锌纳米线分布均匀。研究了其在紫外光（UV）下对亚甲基蓝（MB）水溶液降解的光催化活性，结果表明，与未使用AA - APEA聚合物助剂制备的氧化锌纳米颗粒相比，氧化锌纳米线表现出明显更高的光活性，这可归因于氧化锌纳米线特殊的一维形态。特别是，氧化锌纳米线的降解速率比氧化锌纳米颗粒快11倍。此外，氧化锌纳米线在紫外光催化活性中易于回收利用。这些观察结果可为利用氧化物半导体纳米结构的光催化剂处理废水开拓新的应用。
