CAJ | 학술논문

对在酸性条件下Cu还原MoO42-的行为及还原产物的特性进行了研究。考察了还原体pH值、还原时间、反应温度等因素对钼还原率的影响。结果表明，还原反应要在酸度比较高的条件下才能进行，提高酸度有利于钼的还原；还原速率随温度的升高而增大，符合经典的Arrhenius温度对反应速率的影响规则。同时，采用X-衍射、X荧光分析、拉曼光谱以及扫描电镜对还原产物的特性进行了表征，确定了还原产物的组成与形态，即还原产物中主要的元素有Na、Mo、O，比例是0.2∶4.96∶1，产物组成可定性为Na0.91O19.2H7Mo5.33。产物晶系为六棱型结构，产物中Mo呈现出+5.72价的混合价态。碱分解机理分析得，Cu还原MoO42-的产物易被氧化，生成MoO42-。
대재산성조건하Cu환원MoO42-적행위급환원산물적특성진행료연구。고찰료환원체pH치、환원시간、반응온도등인소대목환원솔적영향。결과표명，환원반응요재산도비교고적조건하재능진행，제고산도유리우목적환원；환원속솔수온도적승고이증대，부합경전적Arrhenius온도대반응속솔적영향규칙。동시，채용X-연사、X형광분석、랍만광보이급소묘전경대환원산물적특성진행료표정，학정료환원산물적조성여형태，즉환원산물중주요적원소유Na、Mo、O，비례시0.2∶4.96∶1，산물조성가정성위Na0.91O19.2H7Mo5.33。산물정계위륙릉형결구，산물중Mo정현출+5.72개적혼합개태。감분해궤리분석득，Cu환원MoO42-적산물역피양화，생성MoO42-。
Reduction of molybdenate by metallic copper in acid solution and its product characteristics were studied. Influences of pH value, reduction time and temperature on Mo reduction efficiency were investigated. The results showed that acid condition was necessary for reduction reaction and higher acidity yielded better effects. Reduction efficiency increased with temperature which was in agreement with the classical Arrhenius rules. Characteristics of the reduction product by X-ray diffraction, X-ray fluorescence, Raman spectrometry and Scanning electronic microscopy indicated that the product was mainly composed by elements of sodium, molybdenum and oxygen by ratio of 0.2∶4.96∶1. The composition is Na0.91O19.2H7Mo5.33 with hexagonal prism structure and the valence of molybdenum is+5.72.