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首页> 外文期刊>Chemistry: A European journal >Preparation of graphene by using an intense cavitation field in a pressurized ultrasonic reactor
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Preparation of graphene by using an intense cavitation field in a pressurized ultrasonic reactor

机译：在加压超声反应器中利用强空化场制备石墨烯

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摘要

A new and efficient method to produce a large quantity of high-quality and non-oxidized graphene flakes from powdered natural graphite by using a high-intensity cavitation field in a pressurized ultrasonic reactor is demonstrated. TEM and selected-area electron diffraction (SAED) confirmed the ordered graphite crystal structure of graphene. Atomic force microscopy (AFM) was used to examine the thickness of the graphene sheets. The delamination (exfoliation) of natural graphite in the liquid phase depends on the physical effects of ultrasound, which break down the 3D graphite structure into a 2D graphene structure. The prepared graphene is of high purity and without defects because no strongly oxidizing chemicals are used and no toxic products result. TEM shows that graphene nanosheets were produced with sizes in the range of tens to hundreds of square nanometers; these nanosheets were smooth and without any ripples and corrugations. High-resolution TEM (HRTEM) and SAED analysis confirmed that the products were graphene nanosheets.
机译：在加压超声反应器中，利用高强度空化场，从粉状天然石墨生产大量高质量的非氧化石墨烯薄片的新的有效方法得到了证明。 TEM和选择区域电子衍射（SAED）证实了石墨烯的有序石墨晶体结构。原子力显微镜（AFM）用于检查石墨烯片的厚度。天然石墨在液相中的分层（剥落）取决于超声的物理效应，超声波会将3D石墨结构分解为2D石墨烯结构。所制备的石墨烯具有高纯度且没有缺陷，因为没有使用强氧化性化学物质，也没有产生有毒产物。 TEM显示出石墨烯纳米片的尺寸在数十至数百平方纳米的范围内。这些纳米片是光滑的，没有任何波纹和波纹。高分辨率TEM（HRTEM）和SAED分析证实该产品为石墨烯纳米片。

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