钛白废盐制备高纯MnO_2纳米棒

以钛白生产中产生的废盐为原料,采用水热法合成制备了高纯MnO2纳米棒,研究了不同反应条件对产品纯度和产率的影响.以纯度和产率为指针,确定了制备高纯MnO2纳米棒的最佳工艺条件,并对样品进行了XRD、FT-IR、SEM、ICP表征.研究结果表明,MnO2纳米棒的纯度随水热反应pH增大而增大,当pH为2.0时,制得的MnO2纳米棒纯度最大,继续增大pH,样品纯度下降,MnO2纳米棒的产率随水热反应pH增大而增大,当pH为4.0时,产率最大,继续增大pH,产率下降;当NaCl的加入量为0.08 g时,纯度和产率同时达到最大;MnO2纳米棒纯度几乎不随NaClO3加入量的变化而变化,而产率随着NaClO3加入量的增加而增加.

Preparation of high purity manganese dioxide nanorods from titanium white waste salt

High purity manganese dioxide nanorods were prepared from titanium oxide abraum salt by hydro- thermal method. In this experiment, the effects of different reaction conditions on the purity and yield were stud- ied. The purity and yield were used to determine the best conditions. Meanwhile, XRD, FT - IR, SEM, ICP were used to characterize the samples. The results show that the purity of manganese dioxide nanorods increases slightly with the increase of pH, the purity reaches the highest at the pH of 2.0, while the purity reduces as the pH continue to increase. The yield of manganese dioxide nanorods increases with the increase of pH, and the yield reaches the highest at the pH of 4.0, while the yield reduces as the pH continue to increase. The purity and the yield reach the highest when the amount of sodium chloride is 0.08 g. With the increase of the dosage of sodium chlorate, the yield of manganese dioxide nanorods increases, while the purity is hardly changed.