α-FeOOH纳米线的合成及其对染料废水的吸附性能研究

Synthesis of α-FeOOH nanowires and its dye wastewater adsorption performance

以FeCl3和NaOH为原料,一步水热合成了α-FeOOH纳米线,通过XRD、SEM技术对材料进行表征,XRD表明该材料的成分是α-FeOOH,从SEM可看出该材料是线并形成网状。考察了其对刚果红的吸附性能,并研究了吸附时间和温度对吸附性能的影响;实验表明:α-FeOOH纳米线对于刚果红的吸附在很短的时间内到达平衡,平衡时间为12 min,动力学吸附行为更符合准二级动力学模型;刚果红在α-FeOOH纳米线的吸附符合Langmuir等温吸附模型,吸附容量为208.77 mg·g-1。

α-FeOOH nanowires have been synthesized via facile one-step hydrothermal route by using FeCl3 and NaOH as the raw materials. The product was characterized by X-ray diffraction （ XRD ） , scanning electron microscope （ SEM ） . The results indicated that the as-prepared α-FeOOH nanowires were interwoven into a network and composition of the material was α-FeOOH. The ad-sorption properties have been investigated for the adsorption of Congo red,and the factors of influence adsorption had been investiga-ted including adsorption time and temperature. The results indicated that the adsorption of Congo red was rapidly. The adsorption e-quilibrium nearly reached in 12 minutes. The pseudo-second-order kinetic model was very suitably used to describe the adsorption behavior of Congo red. The adsorption behavior of Congo red on α-FeOOH nanowires conforms with Langmuir isothermal equation, and the monolayer amount of adsorption was calculated as 208. 77 mg·g-1 .