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Conductive 3D sponges for affordable and highly-efficient water purification†
Nanoscale ( IF 5.8 ) Pub Date : 2018-01-31 00:00:00 , DOI: 10.1039/c7nr09435c Yanbiao Liu 1, 2, 3, 4, 5 , Fang Li 1, 2, 3, 4, 5 , Qin Xia 1, 2, 3, 4 , Jiawei Wu 6, 7, 8 , Jianshe Liu 1, 2, 3, 4, 5 , Mingzhi Huang 9, 10, 11, 12, 13 , Jianping Xie 6, 7, 8
Nanoscale ( IF 5.8 ) Pub Date : 2018-01-31 00:00:00 , DOI: 10.1039/c7nr09435c Yanbiao Liu 1, 2, 3, 4, 5 , Fang Li 1, 2, 3, 4, 5 , Qin Xia 1, 2, 3, 4 , Jiawei Wu 6, 7, 8 , Jianshe Liu 1, 2, 3, 4, 5 , Mingzhi Huang 9, 10, 11, 12, 13 , Jianping Xie 6, 7, 8
Affiliation
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Effective, affordable and low energy water purification technologies are highly desirable to address the current environmental issues. In this study, we developed a low-cost method to achieve efficient organic pollutants degradation by incorporating conductive nanomaterials (i.e., carbon nanotubes, CNTs) to assist electro-oxidation, leading to an efficient conductive nano-sponge filtration device. The integration of electrochemistry has significantly improved the performance of the sponge-based device to adsorb and oxidize organic compounds in aqueous solution. In particular, CNT materials could serve as both high-performance electro-catalysts for pollutant degradation and conductive additives that make polyurethane sponges highly conductive. On the other hand, the polyurethane sponge could work as a low-cost and highly porous matrix that could effectively host these CNT conductors. The conductive sponge can be easily fabricated by a simple dying based approach. The as-fabricated gravity fed device could effectively oxidize two model organic compounds (i.e., >92% antibiotic tetracycline and >94% methyl orange) via a single pass through the conductive sponge under the optimized experimental conditions (e.g., [Na2SO4] = 10 mmol L−1, [CNT] = 0.3 mg mL−1, and [SDBS] = 2.0 mg mL−1). We have achieved >88% degradation efficiency for the antibiotic tetracycline within 6 h of continuous operation with an average electro-oxidation flux of 0.82 ± 0.05 mol h−1 m−2 and an energy requirement of 1.0 kW h kg−1 COD or <0.02 kW h m−3. These promising data make our CNT-sponge filtration device attractive for affordable and effective water purification.
中文翻译：
导电3D海绵，可负担得起的高效净水†
为了解决当前的环境问题，非常需要有效，负担得起的低能耗水净化技术。在这项研究中，我们开发了一种低成本方法，通过掺入导电纳米材料（即，碳纳米管，碳纳米管）来辅助电氧化，从而形成一种高效的导电纳米海绵过滤装置。电化学的整合已大大改善了海绵型装置吸附和氧化水溶液中有机化合物的性能。尤其是，CNT材料既可以用作污染物降解的高性能电催化剂，也可以用作使聚氨酯海绵具有高导电性的导电添加剂。另一方面，聚氨酯海绵可以作为低成本且高度多孔的基质，可以有效地容纳这些CNT导体。可以通过基于染色的简单方法容易地制造导电海绵。预制的重力给料装置可以有效地氧化两种模型有机化合物（即，> 92％抗生素四环素和> 94％的甲基橙）经由经由导电海绵优化实验条件下单次通过（例如，的[Na 2 SO 4 ] = 10毫摩尔大号-1，[CNT] = 0.3毫克毫升- 1和[SDBS] = 2.0 mg mL -1）。在连续运行的6小时内，我们对抗生素四环素的降解效率达到了> 88％，平均电氧化通量为0.82±0.05 mol h -1 m -2，能量需求为1.0 kW h kg -1 COD或< 0.02千瓦hm -3。这些有前途的数据使我们的CNT海绵过滤设备吸引了可负担得起的有效水净化技术。
更新日期：2018-01-31
中文翻译：
导电3D海绵，可负担得起的高效净水†
为了解决当前的环境问题，非常需要有效，负担得起的低能耗水净化技术。在这项研究中，我们开发了一种低成本方法，通过掺入导电纳米材料（即，碳纳米管，碳纳米管）来辅助电氧化，从而形成一种高效的导电纳米海绵过滤装置。电化学的整合已大大改善了海绵型装置吸附和氧化水溶液中有机化合物的性能。尤其是，CNT材料既可以用作污染物降解的高性能电催化剂，也可以用作使聚氨酯海绵具有高导电性的导电添加剂。另一方面，聚氨酯海绵可以作为低成本且高度多孔的基质，可以有效地容纳这些CNT导体。可以通过基于染色的简单方法容易地制造导电海绵。预制的重力给料装置可以有效地氧化两种模型有机化合物（即，> 92％抗生素四环素和> 94％的甲基橙）经由经由导电海绵优化实验条件下单次通过（例如，的[Na 2 SO 4 ] = 10毫摩尔大号-1，[CNT] = 0.3毫克毫升- 1和[SDBS] = 2.0 mg mL -1）。在连续运行的6小时内，我们对抗生素四环素的降解效率达到了> 88％，平均电氧化通量为0.82±0.05 mol h -1 m -2，能量需求为1.0 kW h kg -1 COD或< 0.02千瓦hm -3。这些有前途的数据使我们的CNT海绵过滤设备吸引了可负担得起的有效水净化技术。
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