Graphene oxide-monohydrated manganese phosphate composites: Preparation via modified Hummers method
Yuan R(袁瑞)1,2; Yuan, Jing3; Wu, YP(吴䶮平)1; Ju, Pengfei4; Ji L(吉利)1; Li HX(李红轩)1; Chen L(陈磊)1; Zhou HD(周惠娣)1; Chen JM(陈建敏)1; Chen L(陈磊)
刊名Colloids and Surfaces A: Physicochemical and Engineering Aspects
2018
卷号547期号:0页码:56-63
关键词Graphene Oxide-mnpo4 Center Dot H2o Reduced Go-mn2p2o7 Computer Simulation
ISSN号0927-7757
DOI10.1016/j.colsurfa.2018.03.023
英文摘要

A modified Hummers method was established to prepare graphene oxide-MnPO4·H2O (denoted as GO-MnPO4·H2O) composites. Findings indicate that the as-formed GO-MnPO4·H2O particles are of a petal-shape and exhibit a uniform size of ∼1.2 μm, and they are stable and remain nearly unchanged after 2 day of standing at 30 ℃ in air. The formation mechanism was investigated by computer simulations in combination with experimental explorations. The Mn2+ ions obtained by oxidation reaction can be distributed around the oxygen-containing functional groups of GO (especially for hydroxyl) and interact with them via electrostatic forces or coordination bonds. The as-formed GO-Mn2+ dipolar pair can further act as the anchor sites to facilitate the growth of MnPO4·H2O. During the formation of GO-MnPO4·H2O composites, MnPO4·H2O species contributes to promoting the exfoliation of GO sheets. Moreover, the polycrystalline structure of GO-MnPO4·H2O aggregates is destroyed heavily under 450 °C, and they can be decomposed to generate reduced GO-Mn2P2O7 (denoted as rGO-Mn2P2O7) after 900 ℃ treatment in N2 atmosphere. This methodology made the synthesis of GO-MnPO4·H2O and rGO-Mn2P2O7 composites possible and may be further extended to prepare more complicated nanocomposites based on GO sheets for technological applications.

学科主题材料科学与物理化学
资助项目磨损与表面工程研究组
语种英语
WOS记录号WOS:000429302800007
资助机构the National Natural Science Foundation of China (Grant Nos. U1637204 ; 51775537)
内容类型期刊论文
源URL[http://ir.licp.ac.cn/handle/362003/23651]  
专题兰州化学物理研究所_先进润滑与防护材料研究发展中心
兰州化学物理研究所_固体润滑国家重点实验室
通讯作者Chen L(陈磊); Chen JM(陈建敏)
作者单位1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
3.Qinghai Univ Nationalities, Coll Phys Elect Informat Engn, Xining 810007, Qinghai, Peoples R China
4.Shanghai Aerosp Equipment Manufacturer, Shanghai 200245, Peoples R China
推荐引用方式
GB/T 7714
Yuan R,Yuan, Jing,Wu, YP,et al. Graphene oxide-monohydrated manganese phosphate composites: Preparation via modified Hummers method[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2018,547(0):56-63.
APA Yuan R.,Yuan, Jing.,Wu, YP.,Ju, Pengfei.,Ji L.,...&Chen JM.(2018).Graphene oxide-monohydrated manganese phosphate composites: Preparation via modified Hummers method.Colloids and Surfaces A: Physicochemical and Engineering Aspects,547(0),56-63.
MLA Yuan R,et al."Graphene oxide-monohydrated manganese phosphate composites: Preparation via modified Hummers method".Colloids and Surfaces A: Physicochemical and Engineering Aspects 547.0(2018):56-63.
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