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首页> 外文期刊>Journal of Crystal Growth >One-step synthesis and optical properties of blue titanium suboxide nanoparticles
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One-step synthesis and optical properties of blue titanium suboxide nanoparticles

机译:蓝色次氧化钛纳米粒子的一步合成及其光学性质

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Spherical titanium suboxide nanoparticles (Ti_5O_9, Ti_9O_(17), TiO) are synthesized by arc plasma. A mixture of Ar, H_2 and H_2O at 10 mbar pressure is used as the working gas. The variations of the proportion of H_2O in the mixture gas during the synthesis induce a clear change in the size, color, composition, and optical properties of these nanoparticles. A reduction of H_2O partial pressure reduces the grain size of the product. The titanium suboxide nanoparticles (Ti_5O_9, Ti_9O_(17)) show a blue luster. The UV-Vis-NIR absorption spectra present a substantial absorption in the range 400-800 nm. In particular, there is a uniform and stable absorption from 800 to 3000 nm. FT-IR spectra reveal the H_2O partial pressure significantly affects the -OH groups content on the surface or in the bulk of the nanoparticles.
机译:通过电弧等离子体合成了球形低价氧化钛纳米粒子(Ti_5O_9,Ti_9O_(17),TiO)。使用10毫巴压力下的Ar,H_2和H_2O的混合物作为工作气体。合成过程中混合气体中H_2O的比例变化引起这些纳米粒子的尺寸,颜色,组成和光学性质发生明显变化。 H_2O分压的降低减小了产物的晶粒尺寸。低氧化钛纳米粒子(Ti_5O_9,Ti_9O_(17))显示出蓝色光泽。 UV-Vis-NIR吸收光谱在400-800 nm范围内显示出明显的吸收。特别是在800至3000 nm范围内有均匀而稳定的吸收。 FT-IR光谱显示H_2O分压显着影响纳米颗粒表面或大部分中的-OH基团含量。

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