用于环境应用的钒掺杂氧化锌纳米颗粒的制备与表征
Preparation and characterization of vanadium-doped ZnO nanoparticles for environmental application.
作者信息
Chang Hankwon, Nikolov Jonian, Kim Sun-Kyung, Jang Hee Dong, Lim Seng, Kim Dong-Jin
机构信息
Industrial Materials Research Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 305-350, Korea.
出版信息
J Nanosci Nanotechnol. 2011 Jan;11(1):681-5. doi: 10.1166/jnn.2011.3230.
Vanadium-doped ZnO nanoparticles (ZnO:V) were prepared via flame spray pyrolysis (FSP) from a mixed aqueous solution of zinc hydroxide and vanadyl (IV) acetylacetonate. The morphological, structural and optical properties of the ZnO:V photocatalyst were characterized via transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and UV-visible diffused reflection spectrum (DRS). The photocatalytic activity of ZnO:V was evaluated via photocatalytic degradation of methylene blue (MB). The results showed that the hexagonal wurtzite-structured ZnO:V nanoparticles were successfully synthesized via FSP. The morphology of the as-prepared nanoparticles was polyhedral and non-hollow. The average diameter of ZnO:V, which was calculated from BET result, was 11.7 nm when the molar ratio of V/Zn was 0.1. The maximum decomposition of MB by the ZnO:V nanoparticles was 99.4% after 180 min under UV irradiation, whereas the decomposition of MB by the pure ZnO nanoparticles was 96.6%.
通过火焰喷雾热解（FSP）法，以氢氧化锌和乙酰丙酮氧钒（IV）的混合水溶液为原料制备了钒掺杂的氧化锌纳米颗粒（ZnO:V）。通过透射电子显微镜（TEM）、X射线粉末衍射（XRD）和紫外可见漫反射光谱（DRS）对ZnO:V光催化剂的形貌、结构和光学性质进行了表征。通过亚甲基蓝（MB）的光催化降解来评估ZnO:V的光催化活性。结果表明，通过FSP成功合成了六方纤锌矿结构的ZnO:V纳米颗粒。所制备纳米颗粒的形貌为多面体且非中空。当V/Zn的摩尔比为0.1时，根据BET结果计算得出的ZnO:V的平均直径为11.7 nm。在紫外光照射180分钟后，ZnO:V纳米颗粒对MB的最大分解率为99.4%，而纯ZnO纳米颗粒对MB的分解率为96.6%。
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