Nanocrystalline CaSb2O5(OH)2 and Ca2Sb2O7: Controlled syntheses, electronic structures and photocatalytic activity
Nanocrystalline CaSb2O5(OH)2 and Ca2Sb2O7: Controlled syntheses, electronic structures and photocatalytic activity
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DOI：
10.1016/j.apcatb.2012.08.025
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发表时间：
2012-10
影响因子：
22.1
通讯作者：
Renkun Huang;Ximing Xu;Jia Zhu;Wenjun Liu;Rusheng Yuan;Xianzhi Fu;Yongfan Zhang;Z. Li
中科院分区：
文献类型：
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作者：
Renkun Huang;Ximing Xu;Jia Zhu;Wenjun Liu;Rusheng Yuan;Xianzhi Fu;Yongfan Zhang;Z. Li
建立了一锅ph依赖性水热法控制合成CaSb2O5(OH)2和大比表面积立方ca2sb2o7的简便方法。采用x射线衍射（XRD）、n2吸附BET表面积、紫外-可见漫反射光谱（DRS）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）、能量色散x射线分析（EDX）和傅里叶变换红外光谱（FT-IR）对所得样品进行了表征。用密度泛函理论（DFT）计算了CaSb2O5(OH)2和立方ca2sb2o7的电子结构。通过对甲基橙（MO）和气态苯的降解，考察了制备的CaSb2O5(OH)2和立方ca2sb2o7的光催化性能。发现CaSb2O5(OH)2比Ca2Sb2O7具有更强的光催化活性。CaSb2O5(OH)2较低的晶体填充因子（PF）可能是其光催化性能优于立方Ca2Sb2O7的原因。
A facile one-pot pH-dependent hydrothermal method has been developed in the controlled syntheses of CaSb2O5(OH)2and cubic Ca2Sb2O7with large specific surface area. The as-obtained samples were characterized by X-ray diffraction (XRD), N2-sorption BET surface area, UV–vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray analysis (EDX) and Fourier transformation infrared spectroscopy (FT-IR). The electronic structures of CaSb2O5(OH)2and cubic Ca2Sb2O7were determined by density functional theory (DFT) calculations. The photocatalytic performance of the as-prepared CaSb2O5(OH)2and cubic Ca2Sb2O7was evaluated by the degradation of methyl orange (MO) and gaseous benzene. It was found that CaSb2O5(OH)2is more photocatalytic active than Ca2Sb2O7. A low crystal packing factor (PF) of CaSb2O5(OH)2is probably responsible for its superior photocatalytic performance as compared to that of cubic Ca2Sb2O7.