期刊
JOURNAL OF POROUS MATERIALS
卷 29, 期 4, 页码 983-990出版社
SPRINGER
DOI: 10.1007/s10934-022-01228-y
关键词
Graphene aerogel; Manganese dioxide; Porous structure; Adsorption; Capacitive deionization
资金
- State Key Laboratory of NBC Protection for Civilian [SKLNBC2020-24]
- National Natural Science Foundation of China [51873053, 21975058, 22101244]
- Shandong Natural Science Foundation [ZR2021QB044]
- Taishan Scholars Program [tsqn201909087]
- Qingchuang Technology Support Program of Shandong Province [2020KJC002]
A hierarchically porous three-dimensional graphene/manganese dioxide nanocomposite was prepared using facile steam activation and MnO2 deposition strategies. The nanocomposite exhibited a high surface area and showed good adsorption ability for various metal ions, making it promising for water treatment applications.
In this work, a three-dimensional (3D) graphene/manganese dioxide nanocomposite (PGA/MnO2) with a hierarchically porous structure was prepared by facile steam activation and MnO2 deposition strategies. The as-prepared PGA/MnO2 exhibited a 3D architecture with a high surface area of 490 m(2) g(-1). By characterization of morphology and structure of PGA/MnO2, MnO2 nanoparticles with small size (5-10 nm) were loaded on interconnected graphene sheets. Benefiting from the 3D porous nanostructure as well as the synergetic action between MnO2 and graphene, the PGA/MnO2 sample showed good adsorption ability for various metal ions (Pb2+, Cu2+, and UO22+). Especially, the adsorption capacity of Pb2+ on PGA/MnO2 can reach 247.3 mg g(-1). The PGA/MnO2 with the porous structure also exhibited good capacitive deionization performance and had a NaCl adsorption capacity of up to 15.3 mg g(-1) in a 500 mg L-1 solution. These results demonstrate that the resultant porous PGA/MnO2 is a promising adsorbent for water treatment application.
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