Abstract
In this work, Pani and Pani@g-C3N4 was synthesized by in situ oxidative polymerization methodology of aniline, in the presence of g-C3N4. The as prepared Pani@g-C3N4 was characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction (XRD). The morphological analysis showed well dispersed Pani in g-C3N4, as well as the coating of Pani on g-C3N4. The XRD further revealed this, and peaks of Pani as well as g-C3N4 was observed, thereby suggesting successful synthesis of the composite. The DC electrical conductivity studies under isothermal and cyclic aging conditions showed high stability of composites over 100 °C. Further, the synthesized composite material proved to be an excellent antimicrobial agent against both type i.e., gram positive Streptococcus pneumoniae and negative bacteria Escherichia coli. In the zone inhibition assay 18 ± 0.5, 16 ± 0.75 and 20 ± 0.5, 22 ± 0.5 mm zone diameter were found against E. coli and S. pneumoniae in presence of pure g-C3N4 and Pani@g-C3N4 at 50 µg concentrations, respectively. Further antimicrobial activity in the presence of sunlight in aqueous medium showed that Pani@g-C3N4 is more potent than pure g-C3N4.
Highlights
IntroductionWith the publication of 1977 chemical communication paper by the eminent scientists’ Alan J
With the publication of 1977 chemical communication paper by the eminent scientists’ Alan J.Heeger, Alan G
Apart from this, in contrast to previously reported Pani based composites, here, Pani@gshowed a slight dip in electrical conductivity after 100 ◦ C, which might be due to highly stable g-C3 N4
Summary
With the publication of 1977 chemical communication paper by the eminent scientists’ Alan J. Showed that the non-conduction emeraldine base of Pani is less effective against various gram-negative, gram-positive bacteria and fungus Candida albicans than emeraldine salt of Pani. Based on the light adsorption and conductive properties of Pani along with good antimicrobial properties of g-C3 N4 , it is expected that their composites may show high microbial disinfection activity than the pure counterparts due to the synergism between the constituents. G-C3 N4 composite material showed bactericidal activity against E. coli in aqueous medium under visible light illumination [22]. G-C3 N4 based conducting polymer composites can be exciting new future materials for the disinfection of a wide variety of microorganisms
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