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Hydrothermal synthesis and characterization of carbon-doped TiO2 nanoparticlesThe authors would like to thank the Higher Education Commission of Pakistan for providing funding (NRPU project 5349/Federal/NRPU/R&D/HEC/2016).
Chinese Physics B ( IF 1.5 ) Pub Date : 2020-11-06 , DOI: 10.1088/1674-1056/ab9f29
Zafar Ali 1 , Javaid Ismail 1 , Rafaqat Hussain 2 , A. Shah 3 , Arshad Mahmood 3 , Arbab Mohammad Toufiq 4 , Shams ur Rahman 1
Affiliation  

We report the hydrothermal growth of pure and doped TiO2 nanoparticles with different concentrations of carbon. The microstructure of the as-synthesized samples is characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive x-ray spectroscopy (EDX), and Raman spectroscopy to understand the structure and composition. The XRD patterns confirm the formation of anatase phase of TiO2 with the average crystallite size is calculated to be in the range of 13 nm to 14.7 nm. The functional groups of these nanostructures are characterized by Fourier transformed infrared (FT-IR) spectroscopy, which further confirms the single anatase phase of the synthesized nanostructures. UV-visible absorption spectroscopy is used to understand the absorption behavior, which shows modification in the optical bandgap from 3.13 eV (pure TiO2) to 3.74 eV (1.2 mol% C-doped TiO2). Furthermore, the Ti3+ centers associated with oxygen vacancies are identified using electron paramagnetic resonance spectroscopy (EPR).



中文翻译:

碳掺杂二氧化钛纳米粒子的水热合成和表征作者要感谢巴基斯坦高等教育委员会提供的资金(NRPU 项目 5349/Federal/NRPU/R&D/HEC/2016)。

我们报告了具有不同碳浓度的纯的和掺杂的 TiO 2纳米粒子的水热生长。合成样品的微观结构通过 X 射线衍射 (XRD)、场发射扫描电子显微镜 (FESEM)、能量色散 X 射线光谱 (EDX) 和拉曼光谱进行表征,以了解其结构和组成。XRD图证实了TiO 2锐钛矿相的形成平均微晶尺寸计算为在 13 nm 至 14.7 nm 范围内。这些纳米结构的官能团通过傅里叶变换红外 (FT-IR) 光谱进行表征,进一步证实了合成纳米结构的单一锐钛矿相。紫外-可见吸收光谱用于了解吸收行为,其表明光学带隙从 3.13 eV(纯 TiO 2)变为 3.74 eV(1.2 mol% C 掺杂的 TiO 2)。此外,与氧空位相关的Ti 3+中心使用电子顺磁共振光谱(EPR)来识别。

更新日期:2020-11-06
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