Size-dependent interaction of plasma with anatase TiO2 nanoparticles.,Physical Chemistry Chemical Physics

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Size-dependent interaction of plasma with anatase TiO2 nanoparticles.
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2020-07-24 , DOI: 10.1039/d0cp02452j
Saeid Asgharizadeh ₁ , Sirous Khorram ₁ , Masoud Lazemi ₁ , Alireza Hosseinzadeh ₁ , Marc Malfois ₂

Affiliation

We study the particle size distribution and phase changes of the anatase TiO₂ nanopowder samples when they are subject to the plasma treatments of three different kinds of gases as nitrogen (N₂), oxygen (O₂), and argon (Ar). The plasma gas pressures vary as 0.1, 0.3, and 0.6 Torr. We demonstrate that the plasma treatments have an effect neither on the phase structure nor on the mean nanocrystalline size. The phase and size invariances of the samples are attributed to their nanoscale thermodynamic aspects. We find out that elevating the gas pressure in some cases creates fine-size amorphous nanoparticles with a narrow distribution. Our findings authenticate that plasma treatment affects the amorphous phase with etching particles down to a mean value of ∼3 nm. The small-angle X-ray scattering (SAXS) technique was utilized to obtain the size distribution of the nanoparticles, and the wide-angle X-ray scattering (WAXS) technique was used to probe the phase and size changes of the crystalline structure.

中文翻译：

血浆与锐钛矿型TiO2纳米粒子的尺寸依赖性相互作用。

我们研究了锐钛矿型TiO ₂纳米粉样品在经受三种不同气体如氮气（N ₂），氧气（O ₂）的等离子体处理后的粒度分布和相变。）和氩气（Ar）。等离子气体压力变化为0.1、0.3和0.6托。我们证明等离子处理既不影响相结构也不影响平均纳米晶体尺寸。样品的相位和尺寸不变性归因于其纳米级热力学方面。我们发现，在某些情况下，升高气压会产生具有狭窄分布的细尺寸无定形纳米粒子。我们的发现证明，等离子体处理会影响非晶相，并且蚀刻颗粒的平均值低至3 nm。利用小角X射线散射（SAXS）技术获得纳米粒子的尺寸分布，并利用广角X射线散射（WAXS）技术探测晶体结构的相和尺寸变化。

更新日期：2020-08-05

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