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Oxidant-templating fabrication of pure polypyrrole hydrogel beads as a highly efficient dye adsorbent

机译：纯聚吡咯水凝胶珠的氧化剂模板制备，作为高效染料吸附剂

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Polypyrrole (PPY) is a type of dye adsorbent with good adsorbing capability. Fabrication of PPY with a porous architecture, though technically challenging, can further enhance its dye adsorbing capability due to the tremendous increase of surface area. In this manuscript, an oxidant-templating strategy was developed to fabricate pure PPY hydrogel (PHG) beads comprising nanofibrous networks, which were utilized as highly efficient dye absorbents. For instance, PPY hydrogel beads showed a maximum adsorption capacity of 236.9?mg g ~(?1) for methyl orange (MO), which was significantly higher than that of PPY powder. The minimal effective concentration of MO for the adsorption was as low as 0.4 ppm. Besides that, the PPY hydrogel beads displayed good regeneration performance for adsorbing organic dyes. Thus, the PPY hydrogel beads with low solid contents and large surface area could be considered as a promising organic dye absorbent for wastewater treatment in various industrial fields.
机译：聚吡咯（PPY）是一种具有良好吸附能力的染料吸附剂。具有多孔结构的PPY的制造尽管在技术上具有挑战性，但由于表面积的极大增加，可以进一步提高其染料吸附能力。在此手稿中，开发了一种氧化剂模板化策略来制造包含纳米纤维网络的纯PPY水凝胶（PHG）珠，该珠被用作高效的染料吸收剂。例如，PPY水凝胶珠对甲基橙（MO）的最大吸附容量为236.9？g g〜（？1），明显高于PPY粉。吸附的最小有效MO浓度低至0.4 ppm。除此之外，PPY水凝胶珠还具有良好的再生性能，可以吸附有机染料。因此，具有低固含量和大表面积的PPY水凝胶珠可以被认为是在各种工业领域中用于废水处理的有前途的有机染料吸收剂。

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