Jump to main content
Jump to site search

Issue 102, 2016, Issue in Progress
Previous Article Next Article

One step eco-friendly synthesis of Ag–reduced graphene oxide nanocomposite by phytoreduction for sensitive nitrite determination

Author affiliations

Abstract

We report a facile, ecofriendly, surfactant-free one step green synthesis of a silver–reduced graphene oxide nanocomposite (Ag–RGO) using a Justicia adhatoda (adulsa) leaf extract as green reducing agent and its application to construct a nitrite (NO2) sensor. The crystallinity, size, morphology and composition of as prepared Ag–RGO nanocomposite were studied using a range of techniques. TEM results showed that ultrasmall silver nanoparticles (2–4 nm) were well dispersed on RGO sheets with C/O ratio of 4.4 and 63.8% of sp2 carbon, obtained from XPS analysis. These results confirmed that adulsa leaf extract not only simultaneously reduce silver ion and graphene oxide but also act as effective capping agent. Electrochemical investigations indicated that Ag–RGO nanocomposite had excellent catalytic activity towards nitrite oxidation with sensitive nitrite detection below 1 ppm. The sensor exhibited two linear ranges; one from 10 nM to 1000 nM with a sensitivity of 3.0 × 104 μA mM−1 cm−2 (R = 0.999) and another from 10 μM to 1000 μM with a sensitivity of 373.46 μA mM−1 cm−2 (R = 0.978). These values are superior to other previously reported NO2 sensors.

Graphical abstract: One step eco-friendly synthesis of Ag–reduced graphene oxide nanocomposite by phytoreduction for sensitive nitrite determination

Back to tab navigation

Publication details

The article was received on 23 Sep 2016, accepted on 17 Oct 2016 and first published on 17 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA23655C
Citation: RSC Adv., 2016,6, 100383-100391
  •   Request permissions

    One step eco-friendly synthesis of Ag–reduced graphene oxide nanocomposite by phytoreduction for sensitive nitrite determination

    A. Shaikh, S. Parida and S. Böhm, RSC Adv., 2016, 6, 100383
    DOI: 10.1039/C6RA23655C

Search articles by author

Spotlight

Advertisements