Enhanced catalytic activity of Ag nanoparticles supported on polyacrylamide/polypyrrole/graphene oxide nanosheets for the reduction of 4-nitrophenol

被引：75
|
作者：
Mao, Hui [1 ,2 ]
Ji, Chunguang [1 ,2 ]
Liu, Meihong [1 ,2 ]
Cao, Zhenqian [1 ,2 ]
Sun, Dayin [1 ,2 ]
Xing, Zhiqiang [2 ]
Chen, Xia [2 ]
Zhang, Yu [1 ,2 ]
Song, Xi-Ming [1 ,2 ]
机构：
[1] Liaoning Univ, Liaoning Key Lab Green Synth & Preparat Chem Adv, Shenyang 110036, Liaoning, Peoples R China
[2] Liaoning Univ, Coll Chem, Shenyang 110036, Liaoning, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2018年 / 434卷
基金：
中国国家自然科学基金;
关键词：
Ag nanoparticles (Ag NPs); Polyacrylamide (PAM); Polypyrrole (PPy); Graphene oxide (GO); Catalytic reduction; 4-nitrophenol (4-NP); DISPERSED SILVER NANOPARTICLES; METAL NANOPARTICLES; GREEN SYNTHESIS; CARBON SPHERES; NO REDUCTION; POLYPYRROLE; EFFICIENT; CONDUCTIVITY; OXIDATION; PARTICLES;
D O I：
10.1016/j.apsusc.2017.10.209
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
High-density and well-dispersed Ag nanoparticles (Ag NPs) with a mean size of 20 nm have been successfully supported on the surface of polyacrylamide functionalized polypyrrole/graphene oxide (PAM/PPy/GO) nanosheets. The obtained Ag/PAM/PPy/GO composite nanosheets exhibited an excellent catalytic activity for reduction of 4-nitrophenol by NaBH4 with the kinetic reaction rate constant of 3.38 x 10(-2) s(-1) due to the synergistic effect of all the components of the composite nanosheets. The corresponding catalytic mechanism has been revealed by investigating the effect of different components of Ag/PAM/PPy/GO composite nanosheets on the catalytic performance: GO with the excellent two-dimensional structures offered large surface area for the immobilization of more Ag NPs; PPy with a high electric conductivity promoted the electron transport in the reduction of 4-NP; PAM did not only act as a good linker between Ag NPs and PPy/GO nanosheets for the synthesis of Ag/PAM/PPy/GO composite nanosheets, but also could facilitate the efficient contact between 4-NP and Ag NPs; Ag NPs were the catalytic active site for the reduction of 4-NP, respectively. (c) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：522 / 533
页数：12
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