Lead sensors development and antimicrobial activities based on graphene oxide/carbon nanotube/poly(O-toluidine) nanocomposite.
Graphene oxide/carbon nanotube/poly (O-toluidine) (GO-CNT-POT) nanocomposite was prepared by a situ polymerization method and characterized by X-ray powder diffractometry (XRD) and scanning electron microscopy (SEM). The antibacterial activity of the obtained GO-CNT-POT nanocomposite was also evaluated against Gram positive bacteria Bacillus subtilis, Gram negative bacteria Escherichia coli and antibiotics (Amoxicillin) using the agar plate. The antibacterial study showed that the GO-CNT-POT was found to be most effective against both B. subtilis and E. coli respectively which was significant compared to the amoxicillin and the simultaneously GO-CNT-POT nanocomposite were fabricated onto glassy carbon electrode (GCE) using conducting coating binders by I-V technique, where the total analytical parameters were measured for the development of sensitive lead sensors (Pb(2+)). The GO-CNT-POT nanocomposite were deposited on flat-GCE (surface area: ∼0.0316cm(2)) to result in a sensor that has a fast response to selective Pb(2+) ions in buffer system. Features including sensitivity, detection limit, reproducibility, linear dynamic range, selectivity, and electrochemical performances were investigated in details with the GO-CNT-POT nanocomposite fabricated GCE electrodes. The calibration plot is linear (r(2): 0.9907) over the large concentration range (0.1nM to 1.0mM). The sensitivity and detection limit is calculated as 8.53164μAcm(-2)μM(-1) and 89.0 pM (at a signal-to-noise-ratio, SNR of 3) respectively.
Center of Excellence for Advanced Materials Research and Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, P.O. Box 80203, Saudi Arabia. Electronic address: aapkhan@kau.edu.sa.
Aftab Aslam Parwaz
AA
Khan
Center of Excellence for Advanced Materials Research and Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, P.O. Box 80203, Saudi Arabia.
Anish
A
Khan
Center of Excellence for Advanced Materials Research and Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, P.O. Box 80203, Saudi Arabia.
Mohammed M
MM
Rahman
Center of Excellence for Advanced Materials Research and Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, P.O. Box 80203, Saudi Arabia.
Abdullah M
AM
Asiri
Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Mohammad
M
Oves
D000658:Amoxicillin / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000494:pharmacology; D001412:Bacillus subtilis / Q000187:drug effects / Q000201:enzymology; D055664:Electrochemical Techniques; D004566:Electrodes; D004926:Escherichia coli / Q000187:drug effects / Q000201:enzymology; D006108:Graphite / Q000737:chemistry* / Q000494:pharmacology; D007854:Lead / Q000032:analysis*; D057230:Limit of Detection; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides; D015203:Reproducibility of Results; D014052:Toluidines; D014874:Water Pollutants, Chemical / Q000032:analysis*
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D037742:Nanotubes, Carbon; D010087:Oxides; D014052:Toluidines; D014874:Water Pollutants, Chemical; D007854:Lead; D006108:Graphite; D000658:Amoxicillin; C023622:2-toluidine
Antimicrobial activity; Fabrication; GO-CNT-POT nanocomposite; Pb(2+)sensor