Taras Shevchenko National University of Kyiv, 62a, Volodymyrs'ka Street, 01601 Kyiv, Ukraine.
Science Park Kyiv Taras Shevchenko University, 60, Volodymyrs'ka Street, 01033 Kyiv, Ukraine.
Langmuir. 2017 Nov 28;33(47):13561-13571. doi: 10.1021/acs.langmuir.7b02784. Epub 2017 Nov 15.
Chemical transformations on the surface of commercially available 3C-SiC nanoparticles were studied by means of FTIR, XPS, and temperature-programmed desorption mass spectrometry methods. Thermal oxidation of SiC NPs resulted in the formation of a hydroxylated SiO surface layer with CSi-H and CH groups over the SiO/SiC interface. Controllable oxidation followed by oxide dissolution in HF or KOH solution allowed the SiC NPs size tuning from 17 to 9 nm. Oxide-free SiC surfaces, terminated by hydroxyls and CSi-H groups, can be efficiently functionalized by alkenes under thermal or photochemical initiation. Treatment of SiC NPs by HF/HNO mixture produces a carbon-enriched surface layer with carboxylic acid groups susceptible to amide chemistry functionalization. The hydroxylated, carboxylated, and aminated SiC NPs form stable aqueous sols.
采用傅里叶变换红外光谱（FTIR）、X 射线光电子能谱（XPS）和程序升温脱附质谱（TPD-MS）等方法研究了商用 3C-SiC 纳米颗粒表面的化学转化。SiC NPs 的热氧化导致形成了具有 Si-O-Si 界面上的 CSi-H 和 CH 基团的羟基化 SiO 表面层。通过可控氧化，然后在 HF 或 KOH 溶液中溶解氧化物，可将 SiC NPs 的尺寸从 17nm 调至 9nm。用 HF/HNO3 混合物处理 SiC NPs 会生成富碳的表面层，表面层含有易发生酰胺化学官能化的羧酸基团。经过处理的 SiC NPs 具有羟基、羧基和氨基，可形成稳定的水性溶胶。
