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Antimicrobial and Photocatalytic Abilities of Ag 2 CO 3 Nano‐Rods
Author(s) -
Lončarević Davor,
Vukoje Ivana,
Dostanić Jasmina,
Bjelajac Andjelika,
Đorđević Vesna,
Dimitrijević Suzana,
Nedeljković Jovan M.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700003
Subject(s) - photocatalysis , materials science , valence (chemistry) , polyvinylpyrrolidone , nuclear chemistry , analytical chemistry (journal) , chemistry , catalysis , organic chemistry , polymer chemistry
The rod‐like Ag 2 CO 3 particles (2‐4 × 0.3‐0.6 μm, length × diameter) were synthesized in water by the precipitation reaction between AgNO 3 and NaHCO 3 in the presence of polyvinylpyrrolidone. The X‐ray diffraction analysis revealed the co‐existence of monoclinic and hexagonal phases of Ag 2 CO 3 , without presence of impurities. The band gap energy of Ag 2 CO 3 was found to be 1.4 eV from the diffuse reflectance spectra. Photocatalytic ability of Ag 2 CO 3 was tested using degradation reaction of the organic dye methylene blue over the wide range of concentrations, as well as under long run working conditions in repeated cycles. The photocatalytic mechanism was discussed in terms of the relative energetics of valence and conduction band. Antimicrobial efficiency of Ag 2 CO 3 in dark was tested against Gram‐negative bacteria E. coli . The Ag 2 CO 3 dispersions in the concentration range 0.1‐1.0 mg/mL ensured 100 % reduction of bacteria cells. Time‐dependent measurements revealed that reduction rates of bacteria cells vary in ascending order with the content of Ag 2 CO 3 . On the other hand, the observed reduction rates of bacteria cells do not depend on the concentration of coexisting free Ag + ions (from 2 to 25 mg/L) present in Ag 2 CO 3 dispersion.