C@K2Ti6O13分级纳米材料对Cr(Ⅵ)的吸附去除  

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

作　　者：朱明玉 范德哲 刘蓓 刘舒雅 方明[1] 谭小丽 ZHU Mingyu;FAN Dezhe;LIU Bei;LIU Shuya;FANG Ming;TAN Xiaoli(MOE Key Laboratory of Resources and Environmental System Optimization,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学资源环境系统优化教育部重点实验室,北京102206

出　　处：《无机材料学报》2020年第3期309-314,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(U1607102,21377132,91326202);中央高校基础研究基金(2019MS040)。

摘　　要：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。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.

关 键 词：环境 C@K2Ti6O13 Cr(Ⅵ) 吸附 

分 类 号：TQ174[化学工程—陶瓷工业]