A Template-Free Solution Route for the Synthesis of Well-Formed One-Dimensional Zn2GeO4 Nanocrystals and Its Photocatalytic Behavior

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• 作者：Jun Liang ; Yiqun Cao ; Huan Lin ; Zizhong Zhang ; Changcang Huang ; Xuxu Wang
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：June 17, 2013
• 年：2013
• 卷：52
• 期：12
• 页码：6916-6922
• 全文大小：586K
• 年卷期：v.52,no.12(June 17, 2013)
• ISSN：1520-510X

文摘

Well-defined Zn₂GeO₄ hexagonal nanorods and nanofibers with high aspect ratios have been readily realized in high yield via a simple and general hydrothermal synthesis method free of any surfactant or template. Field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDX), powder X-ray diffraction (XRD), and ultraviolet-visible light diffuse reflectance spectroscopy (UV鈥搗is DRS) revealed a unique hexagonal-prism-shaped one-dimensional (1-D) structure, surface features, anisotropic crystal growth, and crystal phase of Zn₂GeO₄. Detailed investigations indicated that the prismatic Zn₂GeO₄ nanocrystals are uniform single crystal with the longitudinal direction along the [001] and were dominated by (110) and (1̅1̅0) surfaces. The addition of increasing amounts of NaOH was found to facilitate the morphology transition from a hexagonal nanorod shape to a hexagonal fiber shape. As an important wide-band-gap photocatalyst, the products of regular Zn₂GeO₄ nanocrystals with a hexagonal 1-D structure exhibit superior photocatalytic activities for the photocatalytic decomposition of water鈥搈ethanol solution to hydrogen under UV irradiation.