C@K2Ti6O13分级纳米材料对Cr(VI)的吸附去除

Cr(VI)具有非常大的生物毒性, 去除溶液中的Cr(VI)是当前的一个研究热点。本研究制备了C@K₂Ti₆O₁₃分级纳米材料, 并用不同表征手段对材料的物相和结构等进行表征, 进一步探究了初始pH、吸附时间、离子强度等对C@K₂Ti₆O₁₃复合纳米结构吸附Cr(VI)的影响。实验结果表明C@K₂Ti₆O₁₃复合纳米结构对Cr(VI)有较强的吸附能力, 1 h内去除率能够达到50%以上, 其吸附动力学符合准二级动力学模型, 吸附热力学符合Langmuir等温吸附模型, 表明这种分级纳米材料在环境治理方面应用潜力巨大。

C@K2Ti6O13 Hierarchical Nano Materials:Effective Adsorption Removal of Cr(Ⅵ)

Cr(Ⅵ) is toxic to the organic life. Eliminating the pollutant of Cr(Ⅵ) in solution has become a hot research field. In this work, the C@K2Ti6O13 hierarchical nanomaterials were prepared by liquid phase deposition combined with hydrothermal treatment, which were constituted by carbon nano spheres and K2Ti6O13 nanobelts. The morphology and phase of the materials were characterized by different methods. The C@K2Ti6O13 hierarchical nanomaterials show high potential as adsorbent to adsorb Cr(Ⅵ). Effect of initial pH, adsorption time and ionic strength on Cr(Ⅵ) adsorption by C@K2Ti6O13 composite nanostructures were investigated. The elimination rate of Cr(Ⅵ) can reach 50% in 1 h. The adsorption kinetics agrees well with the pseudo-second-order kinetic model, and the adsorption thermodynamics accords with the Langmuir isotherm adsorption model. It can be expected that the C@K2Ti6O13 hierarchical nanomaterials have great application potential in environmental treatment.