摘要
通过一步电沉积法在不锈钢网基底上制备ZnO纳米棒阵列,然后采用水热法在ZnO纳米棒上包覆C,制得C/ZnO纳米复合结构。借助SEM、XRD、TEM、UV-Vis等对相关样品的形貌、结构、物相组成及光催化性能进行表征。结果表明,在沉积电压为-1.0 V的条件下所制备的ZnO纳米棒阵列具有长度适中、分布均匀及垂直取向的结构特点,纳米棒平均直径和长度分别为150 nm和1.35μm,在紫外光照射下其对亚甲基蓝的降解效率可达95.1%,催化稳定性良好;制得的C/ZnO纳米复合结构在可见光照射下对亚甲基蓝的降解效率相比ZnO纳米棒阵列有明显提升,并具有较高的催化稳定性。
ZnO nanorod arrays were prepared on stainless steel mesh substrates by one-step electrodeposition, then carbon coatings were synthesized on the surface of ZnO nanorod arrays via hydrothermal method, and the C/ZnO nanocomposites were therefore obtained. With the aid of SEM, XRD, TEM and UV-Vis, the morphology, microstructure, phase composition and photocatalytic properties of the samples were characterized. The results show that ZnO nanorod arrays prepared at the deposition voltage of-1.0 v exhibit moderate length, uniformly distributed and vertically oriented structure, with the average diameter of 150 nm and length of 1.35 μm. The degradation rate of methylene blue solution catalyzed by ZnO nanorod arrays under UV-irradiation condition can reach 95.1%, and the ZnO nanorod arrays also show good catalytic stability. Compared with the catalysis of ZnO nanorod arrays, the degradation efficiency of methylene blue solution catalyzed by obtained C/ZnO composites is significantly improved with remarkable stability under visible light irradiation condition.
引文
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