摘要
用X -射线衍射法(XRD)研究了EDTA 络合剂对Mn(OH)2 空气氧化反应的影响.结果表明:在30 ℃条件下,Mn(OH)2 的氧化产物为Mn3O4 晶体;当EDTA 在反应液中的浓度为2.5m m ol·L- 1情况下,氧化时间由原来不加EDTA 时的4h 缩短为50m in,EDTA可提高氧化反应速率,并且使Mn3O4 晶粒度减小,沿垂直于(211)面方向晶粒度的减小最明显.对EDTA
The effect of EDTA on the air-oxidation of Mn (OH)2 has been investigated by X-rays diffraction (XRD).The oxidation product of Mn (OH)2 w as Mn3O4 crystalat 30℃,and the oxidation tim e was reduced from 4h to 50m in in the precence of 2.5 m m ol·L- 1 EDTA.It w as considered that EDTA can increase the oxidation rate and decrease the crystallites of Mn3O4,and m ost evident reduce of the crystallites isalong thedirection ofverticalface(211).Thereaction m echanism w asalso discussed briefly.
出处
《河北师范大学学报（自然科学版）》
CAS
1999年第4期510-512,共3页
Journal of Hebei Normal University：Natural Science
基金
河北省科技攻关计划项目!(990238)
