MnO_2纳米材料的可控合成及性能研究  

Controlled Synthesis of MnO_2 Nanomaterials and Their Adsorption Properties

作　　者：杜霞[1] 岳冬梅[1] 郭晓芸[1] 李娟[1] 郭绍福[1] DU Xia;YUE Dong-mei;GUO Xiao-yun;LI Juan;GUO Shao-fu(Huihua College, Hebei Normal University, Shijiazhuang, Hebei 050091, China)

机构地区：[1]河北师范大学汇华学院,河北石家庄050091

出　　处：《石家庄学院学报》2016年第6期9-14,共6页Journal of Shijiazhuang University

基　　金：河北师范大学汇华学院科学研究项目

摘　　要：以δ-MnO_2向α-MnO_2的转化及对其性质的影响为研究目标,考察了反应时间、pH值等因素对转化产物的影响,采用XRD、SEM、循环伏安等先进的测试手段对产物的结构、吸附性能及电容性能进行了表征.结果表明:脑珊瑚状准球形纳米结构的δ-MnO_2在较长时间水热陈化后会转化为纳米棒状的α-MnO_2;α-MnO_2在碱性条件下也会向其他形态转化;δ-MnO_2在吸附性和电容性方面要优于α-MnO_2.The transformation from α-MnO2 to α-MnO2 is discussed. Two factors (reaction time and thepH of the solution) on the products are taken into account. The structures, adsorption and electrochemicalproperties are characterized by XRD (X-Ray Diffraction), SEM (Scanning Electron Microscope) and CV(Cyclic Voltammetry). Results indicate that it can convert from α-MnO2 of corals forming balllike tonanorods α-MnO2 in the longer thermal aging time, and α-MnO2 can convert into other forms underalkaline conditions. The adsorption and electrochemical properties of α-MnO2 are better than α-MnO2’s.

关 键 词：二氧化锰 可控合成 吸附性 电容性 

分 类 号：TQ137.12[化学工程—无机化工]