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Metal–Organic Framework Composite Photothermal Membrane for Removal of High-Concentration Volatile Organic Compounds from Water via Molecular Sieving
ACS Nano ( IF 15.8 ) Pub Date : 2022-05-13 , DOI: 10.1021/acsnano.2c02520 Yubing Peng 1 , Xian Wei 1 , Yunjie Wang 2, 3 , Wenwei Li 2, 3 , Shenxiang Zhang 1 , Jian Jin 1
ACS Nano ( IF 15.8 ) Pub Date : 2022-05-13 , DOI: 10.1021/acsnano.2c02520 Yubing Peng 1 , Xian Wei 1 , Yunjie Wang 2, 3 , Wenwei Li 2, 3 , Shenxiang Zhang 1 , Jian Jin 1
Affiliation
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Water-soluble volatile organic compounds (VOCs) are among the most difficult-to-treat species during wastewater treatment. The current purification and removal of high-concentration VOCs still rely on the energy-consuming distillation and high-pressure driven reverse osmosis technology. There is an urgent need for an advanced technology that can effectively remove high-concentration VOCs from water. Here, we report a metal–organic framework (MOF)/polyaniline (PANI) nanofiber array composite photothermal membrane for removal of high-concentration VOCs from water via molecular sieving during a solar-driven evaporation process. The modified zeolitic imidazole framework-8 (ZIF-8) layer grown on a PANI nanofiber array acts as a molecular sieving layer to evaporate water but intercept VOCs. The composite membrane exhibits high VOCs rejection and a high-water evaporation rate for water containing different concentrations of VOCs. When treating water containing VOCs with a concentration of up to 400 mg L–1, the VOCs rejection rate is up to 99% and the water evaporation rate is 1.0 kg m–2 h–1 under 1 sun irradiation (1 kW m–2). Our work effectively combines the molecular sieve effect with a solar-driven evaporation process, which provides an effective strategy for the treatment of water containing VOCs.
中文翻译：
用于通过分子筛去除水中高浓度挥发性有机化合物的金属-有机骨架复合光热膜
水溶性挥发性有机化合物 (VOC) 是废水处理过程中最难处理的物质之一。目前高浓度VOCs的净化脱除仍依赖于耗能较大的蒸馏和高压驱动反渗透技术。迫切需要一种能够有效去除水中高浓度VOCs的先进技术。在这里，我们报告了一种金属有机骨架 (MOF)/聚苯胺 (PANI) 纳米纤维阵列复合光热膜，用于在太阳能驱动的蒸发过程中通过分子筛去除水中的高浓度 VOC。在 PANI 纳米纤维阵列上生长的改性沸石咪唑框架 8 (ZIF-8) 层充当分子筛层以蒸发水但拦截 VOC。该复合膜对含有不同浓度 VOC 的水表现出高 VOC 截留率和高水蒸发率。处理含有浓度高达 400 mg L VOC 的水时–1，VOCs截留率高达99%，1次太阳照射（1 kW m –2 ）下水分蒸发率为1.0 kg m –2 h –1。我们的工作有效地将分子筛效应与太阳能驱动的蒸发过程相结合，为处理含有 VOC 的水提供了有效的策略。
更新日期：2022-05-13
中文翻译：
用于通过分子筛去除水中高浓度挥发性有机化合物的金属-有机骨架复合光热膜
水溶性挥发性有机化合物 (VOC) 是废水处理过程中最难处理的物质之一。目前高浓度VOCs的净化脱除仍依赖于耗能较大的蒸馏和高压驱动反渗透技术。迫切需要一种能够有效去除水中高浓度VOCs的先进技术。在这里，我们报告了一种金属有机骨架 (MOF)/聚苯胺 (PANI) 纳米纤维阵列复合光热膜，用于在太阳能驱动的蒸发过程中通过分子筛去除水中的高浓度 VOC。在 PANI 纳米纤维阵列上生长的改性沸石咪唑框架 8 (ZIF-8) 层充当分子筛层以蒸发水但拦截 VOC。该复合膜对含有不同浓度 VOC 的水表现出高 VOC 截留率和高水蒸发率。处理含有浓度高达 400 mg L VOC 的水时–1，VOCs截留率高达99%，1次太阳照射（1 kW m –2 ）下水分蒸发率为1.0 kg m –2 h –1。我们的工作有效地将分子筛效应与太阳能驱动的蒸发过程相结合，为处理含有 VOC 的水提供了有效的策略。
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