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Exhausted Cr(VI) Sensing/Removal Aerogels Are Recycled for Water Purification and Solar-Thermal Energy Generation
Small ( IF 13.0 ) Pub Date : 2022-08-04 , DOI: 10.1002/smll.202201949 Xiaoning Li 1 , Meng Li 1 , Quanyu Shi 1 , Hongmin Guo 1 , Lidong Wang 1 , Xiaolin Guo 2 , Zhijun Chen 2 , Jonathan L Sessler 3 , Huining Xiao 4 , Tony D James 5, 6
Small ( IF 13.0 ) Pub Date : 2022-08-04 , DOI: 10.1002/smll.202201949 Xiaoning Li 1 , Meng Li 1 , Quanyu Shi 1 , Hongmin Guo 1 , Lidong Wang 1 , Xiaolin Guo 2 , Zhijun Chen 2 , Jonathan L Sessler 3 , Huining Xiao 4 , Tony D James 5, 6
Affiliation
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Heavy metal pollution has resulted in numerous environmental challenges. However, classic approaches, involving the use of solid adsorbents are subject to limitations, including the high energy consumption required for processing before and after use. Accordingly, strategies that facilitate the use of metal capture media that extends beyond waste remediation are attractive. Herein, a porous fluorescent aerogel (CPC aerogel) is constructed by immersing amino-based carbon dots (CDs-NH2) into a polyethyleneimine (PEI)/carboxymethylated cellulose (CMC) aerogel network for the simultaneous detection and adsorption of Cr(VI). Adsorption experiments confirm that the CMC/PEI containing CDs-NH2 aerogel (CPC aerogel) exhibits good Cr(VI) extraction capacity, and can reach a level that conforms with industrial water safety standards. In addition, the CPC aerogel can continuously detect and remove Cr(VI) at high flux. Following Cr(VI) absorption, the CPC aerogel may be vulcanized (MSx-CPC gel) and used for solar thermoelectric generation resulting in power generation. Additionally, the MSx-CPC gel can be used for solar steam generation and exhibits excellent evaporation rates of ≈1.31 kg m–2 h–1 under one sun irradiation. The results serve to underscore how materials designed for metal ion recognition and adsorption once exhausted can be exploited to provide materials for solar thermoelectric power generation and seawater desalination.
中文翻译：
回收用尽的 Cr(VI) 传感/去除气凝胶用于水净化和太阳能热能发电
重金属污染导致了许多环境挑战。然而，涉及使用固体吸附剂的经典方法受到限制，包括使用前后处理所需的高能耗。因此，促进使用超越废物修复的金属捕获介质的策略很有吸引力。在此，通过将氨基碳点 (CDs-NH 2 ) 浸入聚乙烯亚胺 (PEI)/羧甲基化纤维素 (CMC) 气凝胶网络中构建了多孔荧光气凝胶 (CPC 气凝胶)，用于同时检测和吸附 Cr(VI) . 吸附实验证实含有 CDs-NH 2的 CMC/PEI气凝胶（CPC气凝胶）具有良好的Cr（VI）提取能力，可以达到符合工业用水安全标准的水平。此外，CPC 气凝胶可以在高通量下连续检测和去除 Cr(VI)。在 Cr(VI) 吸收之后，CPC 气凝胶可以被硫化（MS x -CPC 凝胶）并用于太阳能热电发电，从而产生电力。此外，MS x -CPC 凝胶可用于太阳能蒸汽产生，并表现出 ≈1.31 kg m –2 h –1的出色蒸发速率在一次太阳照射下。这些结果有助于强调如何利用设计用于金属离子识别和吸附的材料，一旦耗尽，可以为太阳能热电发电和海水淡化提供材料。
更新日期：2022-08-04
中文翻译：
回收用尽的 Cr(VI) 传感/去除气凝胶用于水净化和太阳能热能发电
重金属污染导致了许多环境挑战。然而，涉及使用固体吸附剂的经典方法受到限制，包括使用前后处理所需的高能耗。因此，促进使用超越废物修复的金属捕获介质的策略很有吸引力。在此，通过将氨基碳点 (CDs-NH 2 ) 浸入聚乙烯亚胺 (PEI)/羧甲基化纤维素 (CMC) 气凝胶网络中构建了多孔荧光气凝胶 (CPC 气凝胶)，用于同时检测和吸附 Cr(VI) . 吸附实验证实含有 CDs-NH 2的 CMC/PEI气凝胶（CPC气凝胶）具有良好的Cr（VI）提取能力，可以达到符合工业用水安全标准的水平。此外，CPC 气凝胶可以在高通量下连续检测和去除 Cr(VI)。在 Cr(VI) 吸收之后，CPC 气凝胶可以被硫化（MS x -CPC 凝胶）并用于太阳能热电发电，从而产生电力。此外，MS x -CPC 凝胶可用于太阳能蒸汽产生，并表现出 ≈1.31 kg m –2 h –1的出色蒸发速率在一次太阳照射下。这些结果有助于强调如何利用设计用于金属离子识别和吸附的材料，一旦耗尽，可以为太阳能热电发电和海水淡化提供材料。
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