Biofiber waste derived zwitterionic and photocatalytic dye adsorbent: switchable selectivity, in-situ degradation and multi-tasking application.
Biofiber waste derived zwitterionic and photocatalytic dye adsorbent: switchable selectivity, in-situ degradation and multi-tasking application.
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DOI：
10.1016/j.biortech.2022.127080
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发表时间：
2022-03
影响因子：
11.4
通讯作者：
Zilong Li;Xin Wang;Wei-Wei Kuang-Wei;Cuihua Dong;Yunxia Fan;Yuan Guo;Qiongjie Qiao;Zhengjie Zhu-
中科院分区：
文献类型：
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作者：
Zilong Li;Xin Wang;Wei-Wei Kuang-Wei;Cuihua Dong;Yunxia Fan;Yuan Guo;Qiongjie Qiao;Zhengjie Zhu-
染料废水和废弃生物纤维给生态和经济的可持续发展带来了巨大的压力。通过利用多巴胺化学和二苯甲酮介导的“接枝”原子转移自由基聚合（ATRP），本研究报道了一种包含废弃羊毛基质、光催化PDA涂层和用于去除染料的两性离子聚合物刷的生物质吸附剂。接枝的两性离子聚合物刷赋予材料不仅具有高吸附容量和快速吸附速率，而且具有可切换的吸附选择性和pH控制的再生能力。得益于如此出色的吸附性能和优异的自支撑性，该吸附剂可以满足静态和动态吸附的多样化需求。在日光下，构建的光催化PDA涂层可以原位降解捕获的污染物，从而实现连续的吸附-降解-再生利用。此外，通过简单的浸涂和更清洁的紫外线照射技术，可以扩大制备过程的规模。这项工作有助于废弃生物纤维废物的升级回收和先进生物质吸附剂的开发。
Dye wastewater and discarded biofiber have brought huge pressure to sustainable developments of ecology and economy. By utilizing dopamine chemistry and benzophenone mediated “grafting onto” atom transfer radical polymerization (ATRP), this work reported a biomass adsorbent containing discarded wool substrate, photocatalytic PDA coating and zwitterionic polymer brushes for dyes removal. The grafted zwitterionic polymer brushes impart the material with not only high adsorption capacity and rapid adsorption rate, but also switchable adsorption selectivity and pH-controlled regeneration capability. Benefiting from such outstanding adsorption performance and excellent free-standing property, the adsorbent could fulfill diversified needs of both static and dynamic adsorptions. Under daylight, the constructed photocatalytic PDA coating could in-situ degrade the captured pollutant, thus achieving consecutive adsorption-degradation-regeneration utilization. Furthermore, through simple dip-coating and cleaner UV-irradiation techniques, the preparation process could be scaled up. This work contributes to both the upcycling of discarded biofiber waste and the development of advanced biomass adsorbent.