新型炭材料（中英文）2024，Vol.39Issue(6)：1108-1116,9.DOI:10.1016/S1872-5805(24)60885-1
用于高效电化学海水提铀的氮/硫共掺杂炭纳米片
N/S co-doped carbon nanosheets for the efficient electrochemical extraction of uranium from seawater
摘要
Abstract
Carbon-based catalysts are promising materials for the electrochemical extraction of uranium from seawater.However,their practical application is often limited by high cost and low catalytic activity.Using low-cost polystyrene sulfonic acid resin and melamine as raw materials,a class of nitrogen and sulfur co-doped carbon nanosheets(CNSs)with high catalytic activity has been developed by a low-temperature hydrothermal treatment and high-temperature carbonization.Because of their high conductivity and high catalytic activity,CNS-based electrodes can catalyze uranyl ions in seawater into easily recoverable Na2O(UO3H2O)x precipitates at-2 V,and achieve an extraction capacity of up to 3 923.7 mg g-1 with a uranium removal of 98.1％in uranium-spiked seawater(1.0×103 mg L-1).In situ Raman spectroscopy showed that a large number of uranium compounds appeared on the surface of the composite electrode within 40 min of extraction.The electrode also recovered 72.7％of the uranium in natural seawater,demonstrating excellent prospects for this application.This work provides a new approach into the design of low-cost,metal-free electrocatalysts for the efficient uranium extraction from natural seawater.关键词
炭纳米片/海水提铀/杂原子掺杂/电催化Key words
Carbon nanosheets/Uranium extraction from seawater/Heteroatom doping/Electrocatalysis分类
化学化工引用本文复制引用
易锬,黄俊龙,岑宗恒,纪轶炜,刘绍鸿..用于高效电化学海水提铀的氮/硫共掺杂炭纳米片[J].新型炭材料（中英文）,2024,39(6):1108-1116,9.基金项目
感谢国家自然科学基金项目(52172061)、广东省自然科学基金杰出青年项目(2024B1515020023)、中央高校基本科研业务费(23yxqntd002和231gbj004)以及广东省高等学校功能分子工程基础研究卓越中心的资助. National Natural Science Foundation of China(52172061) （52172061）
Natural Science Foundation of Guangdong(2024B1515020023) （2024B1515020023）
Fundamental Research Funds for the Central Universities(23yxqntd002,231gbj004). （23yxqntd002,231gbj004）
