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Highly Efficient Graphene‐Based Ternary Composite Catalyst with Polydopamine Layer and Copper Nanoparticles
Author(s) -
Hu HuaWen,
Xin John H.,
Hu Hong
Publication year - 2013
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201300124
Subject(s) - graphene , ternary operation , catalysis , composite number , methylene blue , materials science , nanoparticle , chemical engineering , oxide , nanotechnology , chemistry , organic chemistry , composite material , photocatalysis , engineering , metallurgy , programming language , computer science
A synergistically integrated graphene‐based ternary composite (rG‐Cu) consisting of uniform natural polydopamine (Pdop)‐functionalized graphene sheets (Dop‐rG) and well‐dispersed Cu nanoparticles (NPs) has been developed. By a one‐step reduction and modification of graphene oxide with dopamine, water‐dispersible Dop‐rG was first prepared. Cu NPs were then incorporated homogeneously onto Dop‐rG by a simple solution route leading to activated rG‐Cu, which showed an ultrahigh catalytic activity and good reusability for catalytic reductions of different types of dyes, including methylene blue and azo‐based acid and reactive dyes. It took only 30 s for complete reduction of methylene blue. In addition to the main action of the catalytically active component of the well‐dispersed Cu NPs, the uniform adhesive Pdop layer and graphene base with large surface area and superior electron‐transfer capacity are also believed to assist synergistically the catalytic reduction. The work has opened up a new avenue for synthesis of a graphene‐based ternary composite with extraordinary catalytic activity for practical applications in addressing environmental protection issues.