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.
Durch Behandlung von Holz und Eisenoxid wurde ein nachhaltiger Photokatalysator für vielfältige Verwendungzwecke hergestellt, welcher demethyliertes Lignin (Fe3O4@D‐wood) enthält. Die Charakterisierung erfolgte mittels XRD, UV/Vis, Photostromunterschungen und elektrochemischen Messungen. Dieses Material wurde zum Gegenstand photokatalytischer Untersuchungen für die Wasseraufbereitung und die Materialsynthese mittels radikalischer Photopolymerisation. Die Bestrahlung von Fe3O4@D‐wood mit künstlichem Sonnenlicht zeigte eine verbesserte Aktivität bei der photochemischen Oxidation von organischen Schadstoffen in Gegenwart von H2O2. Die effiziente Erzeugung reaktiver Radikale ermöglichte bei diesem System auch die Photopolymerisation. Hier können Radikale, die auf reaktiven Sauerstoffspezies (ROS) basieren und in dem katalytischen Zyklus erzeugt werden, als die dominierenden Spezies zur Initiierung der radikalischen Polymerisation angesehen werden. Eine Mischung aus UDMA und TPGDA zeigte eine gute Reaktivität mit Cumolhydroperoxid (CHP). Der für die Wasseraufbereitung verwendete Photokatalysator ermöglicht die Wiederverwendung für die Photopolymerisation.
As ustainable photocatalyst ……comprising iron oxide and modified lignin provides agreener approach for material synthesis and finishes the job with wastewater cleaning using sunlight as anatural photon source.M onomers participating in radical photopolymerization enjoy these wonderful reaction conditions.The robust photocatalyst can be reused in several reaction cycles for wastewater cleaning, as reported by Bernd Strehmel, Zhijun Chen, and co-workers in their Research Article (e202301242).
A sustainable photocatalyst for use with multiple purpose comprising demethylated lignin (Fe3O4@D‐wood) was made by treatment of wood and iron oxide. Characterization followed by XRD, UV/Vis, photo‐current studies, and electrochemical measurements. This material became subject of photocatalytic explorations for water treatment and material synthesis by radical photopolymerization. Exposure of Fe3O4@D‐wood with artificial sunlight showed an improved activity considering photochemical oxidation of organic pollutants in the presence of H2O2. The efficient generation of reactive radicals brought this system also to photopolymerization. Here, radicals based on reactive oxygen species (ROS) generated in the catalytic cycle can be seen as the dominating species to initiate radical polymerization. A mixture of UDMA and TPGDA showed good reactivity with cumene hydroperoxide (CHP). Photocatalyst used for water treatment facilitates reuse for photopolymerization.
Ein nachhaltiger Photokatalysator aus Eisenoxid und modifiziertem Lignin forciert die Materialsynthese in eine grünere Richtung und erledigt die Aufgabe mit der Reinigung von Abwasser unter Verwendung von Sonnenlicht als natürlicher photonischer Quelle. Monomere, die an der radikalischen Photopolymerisation teilnehmen, genießen diese wunderbaren Reaktionsbedingungen. Der robuste Photokatalysator ermöglicht insbesondere die Wiederverwendung in mehreren Reaktionszyklen zur Abwasserreinigung, wie Bernd Strehmel, Zhijun Chen et al. in ihrem Forschungsartikel erläutern (e202301242).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.