Designed synthesis of hematite-based nanosorbents for dye removal
Designed synthesis of hematite-based nanosorbents for dye removal
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用于去除染料的赤铁矿纳米吸附剂的设计合成
DOI：
10.1039/c3ta11520h
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Liu, Baixiong
中科院分区：
文献类型：
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作者：
Wu, Junshu;Wang, Jinshu;Liu, Baixiong
我们报道了两种基于赤铁矿（α-Fe 2 O3）的纳米材料的设计和合成，其基于化学亚稳态K1. 33 Mn 8 O 16纳米线（KW）在Fe（NO3）（3）水溶液中的有效水热转化。深入研究了十二烷基苯磺酸钠（SDBS）的作用以及在溶液相中大量生成α-Fe 2 O3中空结构（FHS）和K1.33Mn8O16@ α-Fe 2 O3异质结构纳米线（KFHW）的机理。可控的生长动力学允许方便地控制基于赤铁矿的纳米结构的形态和生产。吸附实验表明，所得的赤铁矿基材料是强大的纳米吸附剂，在室温下快速去除废水中的刚果红。吸附动力学和吸附等温线也进行了研究，研究结果表明，所制备的KFHW和FHS具有很大的潜力，作为环境友好的过滤材料，用于水净化和有机废物的去除。
We report the design and synthesis of two hematite (alpha-Fe2O3)-based nanomaterials based on effective hydrothermal conversion of chemically metastable K1.33Mn8O16 nanowires (KWs) in Fe(NO3)(3) aqueous solution. Insights are gained into the functions of sodium dodecyl benzene sulfonate (SDBS) and the mechanisms for generating large quantities of alpha-Fe2O3 hollow structures (FHSs) and K1.33Mn8O16@alpha-Fe2O3 heterostructured nanowires (KFHWs) in solution phase. The controllable growth dynamics allows convenient control over the morphology and production of the hematite-based nanostructures. Adsorption experiments indicate that the resulting hematite-based materials are powerful nanosorbents for swift removal of Congo red from wastewater at room temperature. The adsorption kinetics and adsorption isotherm are also investigated and the findings indicate that the as-prepared KFHW and FHS hold great potential as environmentally friendly filter materials for water purification and organic waste removal.