活性炭还原五氧化二钒制备二氧化钒

Preparation of VO2 by acticarbon deoxidizing V2O5

摘要:

以V2O5为原料，活性炭为还原剂，采用碳热还原法制备VO2。探讨了还原剂的用量和反应时间对产品质量分数的影响，采用化学法、XRD、SEM、DSC分析了产品的纯度、物相、相变温度、形貌。结果表明：在V2O5和活性炭的摩尔比为2:1、反应时间为5小时的条件下，所得产品纯度为99.6%，转化率达到93.9%。产品为M相VO2，其结晶性良好，颗粒细小且分布均匀。

Abstract:

VO2 was prepared by carbothermal reduction method with V2O5 and acticarbon as raw materials. Effects of reaction time and acticarbon dosage on content of various vanadium oxide were studied. The purity, phase, morphology and phase-transition temperature of product analyzed by chemical titration, XRD, DSC and SEM. The results show that the purity and conversion rate of VO2 can respectively reach 99.6% and 93.9% when n(V2O?5):n(acticarbon) is 2:1 and the reaction time is 5h. The product is M prase VO2 which has small size and uniform distribution particles, well -crystallized.