A polycarboxylic/ether composite polymer electrolyte derived from two-arm monomer and polyethylene oxide (PEO) was in situ synthesized on the cathode. The composite electrolyte exhibits a high ionic conductivity of 3.6 × 10-5 S cm-1, high oxidation stability, excellent stability towards Li metal and makes Li/LiFePO4 present good cyclic and rate performance at 25°C.
ABSTRACT The efficient cathode material helps to improve the removal of antibiotics in the electro‐Fenton (EF) system. The simultaneous doping of transition metals and heterogeneous non‐metallic elements in biochar electrodes can enhance the performance of EF systems, but the catalytic mechanism for EF needs to be further explored. In this study, novel Fe/S‐doped biochar cathodes derived from marine algae (MA) were prepared to investigate the removal rate of ceftriaxone sodium (CS) and the underlying mechanisms. The results indicated that the Fe/S modified MA (Fe/S/MA) biochar cathode showed the highest CS removal rate (71.23%) in the EF system when treating 20 mg/L CS solution containing 8 mg/L Fe 2+ at pH 4. Scanning electron microscopy and X‐ray photoelectron spectroscopy analyses revealed that this cathode provided more iron and sulfur active sites for catalyzing the oxygen reduction reaction to produce H 2 O 2 , enhanced surface porosity, and improved CS removal rate. Electrochemical tests demonstrated this cathode possessed high electrocatalytic capacity, rapid charge transfer capability, and low electrode resistance. This suggested that it can provide more oxygen reduction reaction sites to promote ∙OH generation and enhance Fe 2+ regeneration for improving CS removal. This study demonstrates the Fe/S/MA biochar cathode in the EF system shows great potential for the removal of antibiotics.
Revolutionary technological advances have posed new challenges to humans, and modern technology needs to seek new breakthroughs. Imprinting technology, also known as template technology, is a technology based on the interdisciplinary development of polymer chemistry, biochemistry, chemical engineering, and materials science. The polymer prepared with imprinting technology, termed as imprinted polymer, has a memory effect on specific ions and can realize the selective recognition and enrichment of target species. Therefore, imprinting technology has great potential for application in water environment remediation and industrial wastewater treatment, especially for the treatment of low-concentration, toxic, and difficult-to-degrade heavy metal-containing wastewater. Herein, an overview of recent advances in imprinting technology in the field of adsorption and separation is presented, focusing on methods for the synthesis of imprinted polymers and their application to the separation and enrichment of metal ions in water. Finally, we propose several key issues that remain to be solved in the near future.
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