碳硫单掺杂钽酸钠的水热合成
Hydrothermal Synthesis of Carbon and Sulfur Mono-Doped Sodium Tantalates
摘要：
采用高效节能的一步水热法合成了碳硫掺杂和未掺杂钽酸钠。在140 $^\circ$ C的温度下，在富碱气氛中合成未掺杂的钽酸钠纳米立方体，并在180 $^\circ$ C下合成掺杂的钽酸钠纳米立方体12小时。未掺杂、碳掺杂和硫掺杂的钽酸钠纳米立方体的尺寸分别为38 nm、45 nm和40 nm。采用扫描电子显微镜（SEM）、X射线能谱（EDS）、拉曼光谱、X射线粉末衍射（XRD）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）和紫外可见分光光度计对掺杂和未掺杂钽酸钠（NaTaO $_3$）的形貌、元素、组成、结构、热性能和物理性能进行了表征。硫掺杂的NaTaO $_3$对亚甲蓝的光催化降解活性高于碳掺杂和未掺杂的NaTaO $_3$。使用Tauc图计算未掺杂的NaTaO $_3$、碳掺杂的c-NaTaO $_3$和硫掺杂的s-NaTaO $_3$的带隙分别为3.94 eV、3.8 eV和3.52 eV。
英文摘要：
A set of experiments was conducted to synthesize doped and undoped sodium tantalates with carbon and sulfur in energy efficient single-step hydrothermal process. Undoped sodium tantalate nanocubes were synthesized at 140$^\circ$C and doped one at 180$^\circ$C for 12 hours in rich alkaline atmosphere. The sizes of undoped, carbon-doped, and sulfur-doped sodium tantalate nanocubes were 38 nm, 45 nm, and 40 nm, respectively. The morphological, elemental, compositional, structural, thermal, and photophysical properties of as-synthesized doped and undoped sodium tantalate (NaTaO$_3$) were characterized using scanning electron microscope (SEM), energy dispersive x-ray spectroscope (EDS), Raman spectroscopy, X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), Fourier transform infrared spectrophotometer (FTIR), and UV-vis spectrophotometer. The sulfur doped NaTaO$_3$ shows a higher photocatalytic activity in degradation of methylene blue than carbon doped and the undoped NaTaO$_3$. The band gaps of undoped NaTaO$_3$, carbon doped c-NaTaO$_3$, and sulfur doped s-NaTaO$_3$ were calculated to be 3.94 eV, 3.8 eV, and 3.52 eV, respectively using Tauc plot.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
