Cobalt has great biological effects on human beings and also other living organisms, hence its determination is very important. In this regard, a novel coated graphite electrode was designed for determination of Co2+ ions by exploiting 6-chloro-11- azabenzo[a]phenothiazin-5-one as a neutral ion carrier, for the first time. The foremost function was witnessed from the membrane composition of PVC (29%), Potassium tetrakis (4-chlorophenyl) borate (2%) as an ionic additive,6-chloro-11-azabenzo[a]phenothiazin-5-one (9%) as ionophore and Dioctylphthalate (60%) as Plasticizer. The linearity domain of the membrane sensor was from 5×10-7 to 1×10-2 Mol L-1 with the Nernstian slope value of 30.1 mV.Decade-1. The potential response of the designed electrode was also investigated in non-aqueous mediums and it was found out that the electrode is also able to be used in systems that are entailed of 20% of ethanol and acetone organic solvents. The response time and lifespan of the electrode was 5 S and 3 months respectively. The sensor selectivity was also evaluated by match potential method over other cations and it shows an eminent selectivity towards Co2+ over all of the inspected ions. The applicability of the electrode in the potentiometric titration with EDTA was also investigated. In the end, the proposed electrode was utilized for determination of Co2+ in four aqueous specimens as real samples. Manuscript profile

In this study, simple ionic liquid-assisted preparation of SnO microflowers with nanosheet subunits under reflux condition without calcination were described. Samples were synthesized using 1-pentyl-3-methylimidazolium bromide, [pmim]Br, as an ionic liquid in different molar ratio, sodium hydroxide and Tin(II) chloride. The results show that SnO with high purity and uniform size distribution was obtained using 1:4:4 molar ratios of SnCl2/NaOH/IL by simple reflux method and the ionic liquid only act as a suitable template. The characterization of the products were carried out by FT-IR, X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS) and DRS techniques. Photodegradation of Remazol Black B (RBB) from the aqueous solution was investigated by SnO nanosheets (93.48% dye removal). The rate of degradation of RBB in the presence of SnO is distinctive by the pseudo-first-order kinetic model (R2 > 0.79).Keywords: SnO, Nanosheet, Microflower, 1-Pentyl-3-methylimidazolium bromide, Ionic liquid, Photodegradation, Remazol Black B. Manuscript profile

In this study, simple ionic liquid-assisted preparation of SnO microflowers with nanosheet subunitsunder reflux condition without calcination were described. Samples were synthesized using 1-pentyl-3-methylimidazolium bromide, [pmim]Br, as an ionic liquid in different molar ratio, sodium hydroxideand Tin(II) chloride. The results show that SnO with high purity and uniform size distribution wasobtained using 1:4:4 molar ratios of SnCl2/NaOH/IL by simple reflux method and the ionic liquidonly acts as a suitable template. The characterization of the products was carried out by FT-IR, X-raypowder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy(EDXS) and DRS techniques. Photodegradation of Remazol Black B (RBB) from the aqueous solutionwas investigated by SnO nanosheets (93.48% dye removal). The rate of degradation of RBB in thepresence of SnO is distinctive by the pseudo-first-order kinetic model (R2 > 0.79). Manuscript profile