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魏永副教授课题组在美国化学会“Industrial & Engineering Chemistry Research”发表研究论文

   发布时间: 2016-02-27    访问次数: 615

Electrosorption of Lead Ions by Nitrogen-Doped Graphene Aerogels via One-Pot Hydrothermal Route

Yong Wei, Lan Xu, Yongxin Tao,Chao Yao,Huaiguo Xue, Yong Kong

Ind. Eng. Chem. Res. 2016, 55, 19121920 DOI: 10.1021/acs.iecr.5b04142(SCI二区TOP期刊)

 

ABSTRACT: We present an efficient Pb2+ electrosorption by nitrogen-doped graphene aerogels (NGAs) prepared by one-pot hydrothermal synthesis of nitrogen-doped graphene hydrogels (NGHs) followed by freeze-drying treatment. Pb2+ can be effectively removed by the as-prepared NGAs at an applied negative potential, and the removal mechanisms include (1)electrostatic attraction derived from external electric field, (2)electrostatic attraction caused by intrinsic charges on NGAs and Pb2+, (3) large specific surface area (SBET) of NGAs, and (4) coordination between doped nitrogen atoms and Pb2+. More importantly, after a simple and convenient electrodesorption treatment, the NGAs exhibit promising performance in recyclable electrosorption, and the removal ratio (%R) of Pb2+ decreases only ~5% after successive 100 cycles, which is significantly superior to conducting polymer and conducting polymer/reduced graphene oxide (rGO) composites-based electrosorption.