期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 11, 页码 6041-6046出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b00296
关键词
graphene; microspheres; silver nanoparticles; sonication-assisted self-assembly; catalytic reduction
资金
- National Natural Science Foundation of China [21401015, 21101136, 21403020]
- Basic and Frontier Research Program of Chongqing Municipality [cstc2014jcyjA50012, cstc2012jjA50037, cstc2013jcyjA20023]
- Natural Science Foundation of Yongchuan (Ycstc) [2014nc4001, 2014nc3001]
- Foundation of Chongqing University of Arts and Sciences [R2013CJ04, R2012CJ15]
The hybridizations of functional microspheres with graphene or graphene oxide (GO) sheets often suffer from severe agglomeration behaviors, leading to poor water dispersity of the resultant composite materials. Here, we first demonstrate that the sonication-assisted self-assembly of tiny GO sheets (whose lateral size less than 200 nm) on microspheric substrates like cationic polyelectrolyte-modified SiO2 microspheres could effectively overcome such a common drawback. On the basis of this facile strategy, we further developed reduced graphene oxide/silver nanoparticle composite film wrapped SiO2 microspheres, which not only possessed unique raspberrylike structure and high aqueous dispersity but also exhibited exceptional catalytic activity toward the reduction of 4-nitrophenol.
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