期刊论文、会议论文

Electrochemical adsorption behavior and mechanism of diethyldithiocarbamate on surface of marmatite

中文

中国有色金属学报

1004-0609

2005

15

9

1452-1457

2005中国储能电池与动力电池及其关键材料学术研讨会

中国有色金属学报

2005-05-12

长沙

中国材料研究学会

10.3321/j.issn:1004-0609.2005.09.023

50234010:国家自然科学基金

本校为第一机构

采用光谱分析、循环伏安及恒电位阶跃法,研究了乙硫氮(NaD)在铁闪锌矿表面吸附的电化学行为及机理,该机理与浮选电化学的混合电位模型并不一致.在酸性条件下,当电位为0～200 mV时,乙硫氮在铁闪锌矿表面电化学吸附形成双乙硫氮(D2);当电位为410 mV时,乙硫氮与矿物发生电化学反应形成ZnD2和S°,并产生钝化,且表面疏水性强;当电位大于600 mV,电极过程由自腐蚀反应控制.在中性和碱性条件下,铁闪锌矿表面的电极过程主要由自腐蚀阳极溶解控制.随着pH值的增大,表面中间态分别为Fe(OH)D2、Fe(OH)2D和Zn(OH)D,并随电位增大进一步氧化成Zn(OH)2、Fe(OH)3和D2,且矿物表面亲水性强.在开路电位条件下,铁闪锌矿...

The electrochemical adsorption behavior and mechanism of diethyl dithiocarbamate （NaD） on the surface of marmatite, which are different from the mixed potential model of flotation electrochemistry, were studied by spectrum analysis, CA voltammetry and constant potential step. Under acidic condition, the dimer diethyldithiocarbamate （D2） is formed on marmatite through the electrochemical adsorption of diethyl dithiocarbamate at 0 - 200 mV. ZnD2 and SO are formed by electrochemical reaction and result in the passivation at 410 mV, and the sur...