Controllable synthesis of silver nanoparticle-decorated reduced graphene oxide hybrids for ammonia detection

Shumao Cui; Shun Mao; Zhenhai Wen; Jingbo Chang; Yang Zhang; Junhong Chen

doi:10.1039/c3an36922f

Controllable synthesis of silver nanoparticle-decorated reduced graphene oxide hybrids for ammonia detection

Analyst. 2013 May 21;138(10):2877-82. doi: 10.1039/c3an36922f.

Authors

Shumao Cui¹, Shun Mao, Zhenhai Wen, Jingbo Chang, Yang Zhang, Junhong Chen

Affiliation

¹ Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53211, USA.

PMID: 23527378
DOI: 10.1039/c3an36922f

Abstract

We demonstrate controllable fabrication of Ag nanoparticle (NP)-decorated reduced graphene oxide (RGO/Ag) hybrids and their application for fast and selective detection of ammonia at room temperature. Ag NPs greatly improved the sensitivity of RGO. The response time (6 s) and recovery time (10 s) are comparable with our previous Ag NP-decorated multiwalled carbon nanotube (MWCNT/Ag) NH3 sensors; however, the sensitivity is about twice that of MWCNT/Ag hybrids. We found that the loading density of NPs greatly affects the sensing performance of RGO/Ag hybrids and a proper NP loading leads to maximum sensitivity.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ammonia / analysis*
Graphite / chemistry*
Metal Nanoparticles / chemistry*
Oxidation-Reduction
Oxides / chemistry*
Silver / chemistry*

Substances

Oxides
Silver
Ammonia
Graphite