α-Fe_2O_3纳米颗粒的制备及其对曙红B的吸附性能研究  

Preparation of α-Fe_2O_3 Nanopaticals and Its Absorption Capability of Eosin B

作　　者：杨淑敏[1] 孙丰强[1] 

机构地区：[1]华南师范大学化学与环境学院,广州510006

出　　处：《华南师范大学学报（自然科学版）》2015年第6期52-57,共6页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(31071057;21571068);广东省学科建设专项资金项目(2013KJCX0057)

摘　　要：以Fe(NO_3)_3·9H_2O与Na_2S_2O_3为前驱体溶液,加入表面活性剂聚乙烯吡咯烷酮(PVP),采用光化学合成方法首先制备FeO(OH)/S粉体材料,然后通过高温煅烧后得到Fe_2O_3纳米颗粒.结果表明,随着煅烧温度的升高,α-Fe_2O_3纳米颗粒的结晶度变好,晶粒粒度逐渐增大;α-Fe_2O_3纳米颗粒对曙红B具有较好的吸附效果,煅烧温度为400℃时吸附效果最佳.研究了不同吸附剂用量、p H对吸附性能的影响.Fe_2O_3纳米颗粒对曙红B的吸附过程符合二级动力学与Freundich等温吸附模型,最大吸附量为368 mg/g.Using the mixed aqueous solution of Fe （NO3 ）3 · 9H2O and Na2S2O3 as the precursors, FeO （OH）/S powder could form under the irradiation of a low power ultraviolet lamp with adding polyvinylpyrrolidone as the surfactant. After calcination at different high temperatures, FeO（OH）/S powders were transferred into α-Fe2O3 nano- paticals. When the calcination temperature increasing, cL-Fe203 nanopaticals with varied crystallinity and crystalline size were prepared, and employed in absorption eosin B. When the calcination temperature was controlled at 400℃, the absorption capability was in the optimal value. Effects of α-Fe2O3 account and pH value were studied in detail. According to the simulations, the absorption process of α-Fe2O3 nanopaticals for eosin B was found obeyed the second order adsorption kinetics and the Freundlich isotherm models. The maximum adsorption capacity reached 368 mg/g.

关 键 词：光化学 Α-FE2O3 吸附性能 曙红B 

分 类 号：O614.81[理学—无机化学]