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Fe_3O_4超细粒子已经通过沉淀法制备出来.其平均粒径约10nm.比表面为149m~2.g~(-1).零电荷点的pH值为6.85-7.07.十二烷基磺酸钠在Fe_3O_4超细粒子上的吸附等温线已经被测得,并应用Mossbauer谱初步研究了样品在吸附前后的磁学性质.
Fe_3O_4 ultrafine particles have been prepared by precipitation method, the average particle size of about 10nm, the specific surface of 149m ~ 2.g ~ (-1). Zero charge point pH value of 6.85-7.07. Sodium dodecyl sulfate The adsorption isotherms on Fe_3O_4 ultrafine particles have been measured, and the Mossbauer spectra have been used to study the magnetic properties of the samples before and after adsorption.