3D Hierarchical Architectures of Sr2Sb2O7: Hydrothermal Syntheses, Formation Mechanisms, and Application in Aqueous-Phase Photocatalysis
3D Hierarchical Architectures of Sr2Sb2O7: Hydrothermal Syntheses, Formation Mechanisms, and Application in Aqueous-Phase Photocatalysis
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Sr2Sb2O7 的 3D 层次结构：水热合成、形成机制及其在水相光催化中的应用
DOI：
10.1021/cg800404e
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发表时间：
2008-11
影响因子：
3.8
通讯作者：
Hun Xue
中科院分区：
文献类型：
--
作者：
Ling Wu;Xianzhi Fu;Hui Dong;Xuxu Wang;Zhaohui Li;Hun Xue
以Sb 2 O 5为原料，在表面活性剂十六烷基三甲基溴化铵（CTAB）或聚乙烯吡咯烷酮（PVP）的存在下，通过水热法成功合成了具有不同三维层次花状结构的Sr 2Sb 2 O 7（Sr 2Sb 2 O 7（CTAB）和Sr 2Sb 2 O 7（PVP））。通过X射线衍射（XRD）、N2吸附BET表面积、紫外-维斯漫反射光谱（DRS）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）和傅里叶变换红外光谱（FT-IR）对所得样品进行表征。提出了Sr_2Sb_2O_7（CTAB）和Sr_2Sb_2O_7（PVP）的形成机理。在紫外光照射下，Sr 2Sb 2 O 7（CTAB）和Sr 2Sb 2 O 7（PVP）对水杨酸的降解均表现出明显的光催化活性。Sr 2Sb 2 O 7（PVP）具有较高的禁带宽度和较强的光催化活性，对水杨酸的降解具有较好的催化活性。
In the presence of the surfactant cetyltrimethyl ammonium bromide (CTAB) or poly (vinyl pyrrolidone) (PVP), different three-dimensional (3D) hierarchical flowerlike architectures of Sr2Sb2O7 (Sr2Sb2O7 (CTAB) and Sr2Sb2O7 (PVP)) were successfully synthesized via a facile hydrothermal process using Sb2O5 as the starting material. The obtained samples were characterized by X-ray diffraction (XRD), N2-sorption BET surface area, UV−vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and Fourier transformation infrared spectroscopy (FT-IR). The formation mechanisms for Sr2Sb2O7 (CTAB) and Sr2Sb2O7 (PVP) were proposed. Both Sr2Sb2O7 (CTAB) and Sr2Sb2O7 (PVP) show obvious photocatalytic activity for the decomposition of salicylic acid under UV light illumination. Sr2Sb2O7 (PVP) shows the best photocatalytic activity for the degradation of salicylic acid due to its higher band gap energy an...