典型文献
Fluorination reaction of UO3 and electrochemical preparation of UO2
文献摘要：
In this work,a technique was proposed to prepare UO2 from UO3 by the two processes of fluorination reaction of UO3 with NH4HF2 and electrochemical reduction of UO2+2 for the recycle uranium.The feasi-bility of fluorination reaction was firstly confirmed using thermodynamic calculation;then,the products were analyzed using XRD,Raman and fluorescence to be UO2F2.The fluorination mechanism was in-ferred to be UO3(s)+NH4HF2→(NH4)3UO2F5→ NH4(UO2)2F5→UO2F2.The redox behavior of UO22+on W electrode was investigated by cyclic voltammetry and square wave voltammetry,which indicated that UO2+was reduced to UO2 via a two-step single electron transfer with diffusion-controlled.The diffu-sion coefficient of UO22+was calculated to be 6.22×10-5 cm2/s.The disproportionation reaction of UO2+was observed,and the relationship between the disproportionation reaction and scan rate was discussed.Moreover,the electrochemical fabrication of UO2 was conducted by electrolysis at-0.8 V,and the prod-uct was analyzed by XRD,SEM and EDS to be UO2.ICP-AES results showed that the extraction efficiency of UO2 could reach 98.53％.
文献关键词：
中图分类号：
作者姓名：
Rugeng Liu;Yangyang Meng;Wenjing Ji;Wei Han;Mei Li;Yang Sun
作者机构：
Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China
文献出处：
引用格式：
[1]Rugeng Liu;Yangyang Meng;Wenjing Ji;Wei Han;Mei Li;Yang Sun-.Fluorination reaction of UO3 and electrochemical preparation of UO2)[J].中国化学快报（英文版）,2022(07):3435-3438
A类：
UO2F2,+NH4HF2,3UO2F5,2F5,UO22+on,UO2+was,UO22+was
B类：
Fluorination,reaction,UO3,electrochemical,preparation,In,this,work,technique,proposed,prepare,from,by,two,processes,fluorination,reduction,UO2+2,recycle,uranium,feasi,bility,firstly,confirmed,using,thermodynamic,calculation,then,products,were,analyzed,Raman,fluorescence,mechanism,ferred,redox,behavior,electrode,investigated,cyclic,voltammetry,square,wave,which,indicated,that,reduced,via,step,single,electron,transfer,diffusion,controlled,coefficient,calculated,disproportionation,observed,relationship,between,scan,rate,discussed,Moreover,fabrication,conducted,electrolysis,EDS,ICP,AES,results,showed,extraction,efficiency,could,reach
AB值：
0.457139
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