Highly selective adsorption of Hg2+ by a polypyrrole–reduced graphene oxide composite

Abstract

A facile chemical route to synthesize the polypyrrole-reduced graphene oxide composite showing a highly selective Hg(2+) removal capacity is reported. The gram scale production, high adsorption capacity and recycling make this material practically useful for waste water treatment.

Adsorption characteristics of 1,2,4-trichlorobenzene, 2,4,6-trichlorophenol, 2-naphthol and naphthalene on graphene and graphene oxide

“…Due to their large theoretical specific surface area, remarkable electronic properties and high ability of modification, potential environmental applications of G as 0008-6223/$ -see front matter Ó 2012 Elsevier Ltd. All rights reserved. http://dx.doi.org/10.1016/j.carbon.2012.08.024 superior adsorbent have been recognized for removal of organic and inorganic contaminants from water and gases [6][7][8][9][10][11][12][13][14]. For example, it was found that sulfonated G was one of the most effective adsorbents for naphthalene and 1-naphthol [6,7].…”

“…In addition, G nanosheets also have high adsorption affinity for heavy metals, where the amount of active surface sites on G is an important factor influencing the adsorption of heavy metal ions. Previous works on arsenic adsorption onto magnetite reduced GO composites and G sheets [10,11], and on Hg(II) adsorption to polypyrrole-reduced GO composites showed that G composites have a strong adsorption affinity for metal ions [12,13].…”

Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature

“…Such an increase in the peak current was more pronounced for PNCs prepared at 10 ± 1°C over those prepared at 30 ± 1°C [13][14][15][16][17][18][19] (Fig. 7a).…”

“…The treated substrate was dried at room temperature for 2 h and then at 100°C/400 mmHg for 48 h. This afforded cathodes with a mass thickness of electroactive materials by 5 ± 1 mg over the 316-SS substrate [25]. low temperature liberates PPY nanoparticles [12] with improved specific and electrochemical conductivities [13][14][15][16][17][18][19].…”

Environmental applications using graphene composites: water remediation and gas adsorption

“…Chandra and Kim synthesized a polypyrrole-rGO hybrid via noncovalent functionalization of graphene sheets with polypyrrole. 44 Polypyrrole was shown to grow along the graphene sheets (Fig. 2a), which resulted in a high surface area and mesoporous nature.…”