Electrosynthesis Of B₂O With Diamond-like Structure At Ambient Temperature And Pressure

In this dissertation, the research development of boron sub-oxides was summarized. It was mainly set forth that diamond-like B₂O was synthesized at atmospheric condition by way of electrochemical method. Finally, we prospect the future of electrochemical synthesis of diamond-like B₂O. People are short of study for boron sub-oxides and less acquainted with the character of them, though boron sub-oxides is the third superhard materials. One of the important reasons is that pure boron sub-oxide is very hard to be synthesized. Thereby, it is necessary that electrochemical synthesis method which is usually availed of making pure substance is used to carried on the work of of synthesis of boron sub-oxide at atmospheric condition.Diamond-like B₂O is isoelectrons to diamond, so the structure of it may be same with diamonds'. In view of it, we analyzed the procedure of synthesis of diamond at ambient pressure at first. Then we study the way of electrochemical synthesis of diamond-like B₂O. A conventional three-electrode cell was used with Ionic liquid [BMIM]BF₄ as electrolyte. Electroreduction behavior of BF₄^- was monitored using linear sweep voltammetry and cyclic voltammetry by a CHI604A electrochemical analyzer and long-term electrolysis with a HDV-7 potentiostat. XRD, Raman spectrum, IR spectrum, EPMA, XPS and SEM has been used to quality, analyze and characterize the experiment products.We also used CH₃CN — (Bu)₄N⁺BF₄ — (Bu)₄N⁺Cl system to instead of [BMIM]BF₄ ionic liquid in order to cut down the cost. Although we have made much progress on synthesizing diamond-like B₂O, we still need to further our research on it to increase the particle size.