摘要
α—Fe<sub>2</sub>O<sub>3</sub>是多种工业催化剂的主要成分,有反铁磁结构的特殊性.张和Matijevie的实验曾经发现,草酸在均匀α-Fe<sub>2</sub>O<sub>3</sub>胶体粒子上的吸附随温度的升高而增加,这可能暗示着草酸从物理吸附向化学吸附的过渡.考虑到磁学测量需要更为明显的表面效应,我们制备了较小的α-Fe<sub>2</sub>O<sub>3</sub>粒子,并测定其吸附草酸前后的磁化率变化。
The adsorption of oxalic acid on α-Fe_2O_3 from solutions has been studied by magnetic measurement. It has been found that the adsorption of oxalic acid on α-Fe_2O_3 exists a transition from physical adsorption (at 20℃) to chcnlisorption (at 80℃). With decreasing of pH of solution both the adsorption amount and the adsorptive binding are enhanced.
出处
《化学研究与应用》
CAS
CSCD
1992年第1期96-98,共3页
Chemical Research and Application
基金
国家自然科学基金的课题
