Application of ultrasound in graphene exfoliation

Abstract: Graphene is a recently discovered carbon nanomaterial with a two-dimensional planar structure,itThe special single atomic layer structure gives it many * physical and chemical properties. Significant progress has been made in the research of graphene,In chemical power sources, optoelectronic devices, and multiphase catalysis, etcThe field has received widespread attention. The prepared graphite oxides need to undergo stripping, reduction, etcSteps are required to obtain a single layer of graphene. The general method of peeling is ultrasonic peeling,About to stoneInk oxide suspension is sonicated at a certain power for a certain period of time. Ultrasonic waves suspended on oxidized graphiteThe sparse and dense radiation in the floating liquid causes the liquid to flow and produce numerous tiny bubblesSome bubbles form and grow in the negative pressure zone of longitudinal propagation of ultrasonic waves,And in the positive pressure zone, it quickly closes,In this process known as the "cavitation" effect, bubble closure can form over1.0×108PaThe instantaneous high pressure of one atmosphere, the continuously generated high pressure is like a series of small "explosions"The explosion continuously impacts graphite oxide, causing the graphite oxide flakes to rapidly peel off and form a single-layer graphite oxide(I.e. graphene oxide)Additionally,The size of graphene oxide flakes can be adjusted by the ultrasound power and duration.

1. Project Introduction

The ultrasonic host is vertically placed inside the pipeline reactor, with the reactor support and outer coverMade of stainless steel and internally pasted5cmThick soundproof cotton can reduce the noise generated by ultrasonic cavitation; Ultrasonic drive power supply, touch screen, communication management machine, and Ethernet switchAll are placed inside the electrical control cabinet, with the front of the electrical cabinet placed10 Touchscreens larger than inches can be used forIndividual parameter settings are made for each unit module within the basic module, such as host power and system parameter settings. There is a main operation button installed on the electrical control cabinet panel（With indicator light）、Emergency stop button and alarm indicator light, the overall system has oscillator abnormal alarm, power abnormal alarm, cabinet temperature abnormal alarm, and oscillator tool head wear alarm.