Photocatalytic degradation of ciprofloxacin drug in water using ZnO nanoparticles

El‐Kemary, Maged; El-Shamy, Hany; El‐Mehasseb, Ibrahim M.

doi:10.1016/j.jlumin.2010.07.013

Cited by 257 publications

(112 citation statements)

References 35 publications

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“…As displayed in Figure 8, the values of K app increased slightly as the pH increased, since the formation of ·OH at high pH values is expected. Similarly, at high pH values, an increased photocatalytic degradation of chlorinated hydrocarbons with synthesized ZnO photocatalysts was reported due to the enhanced formation of ·OH [5,10,25]. …”

Section: Effect Of Phmentioning

confidence: 77%

Enhanced Removal of Trichloroethylene in Water Using Nano-ZnO/Polybutadiene Rubber Composites

et al. 2016

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An innovative nanoscale ZnO/polybutadiene rubber composite (ZBRC) was developed as a valid alternative to TiO 2 particles or immobilized TiO 2 for the mineralization of chlorinated hydrocarbons without difficulties in the recovery of nanoscale photocatalyst particles. A synergistic increase in the removal of 1,1,2-trichloroethylene (TCE) through the coupled reaction processes (i.e., sorption, photolysis, and photocatalysis) was observed because sorption of TCE to the ultraviolet(UV)-transparent polybutadiene rubber occurred, and was coupled with the heterogeneous photocatalytic reactions with nanoscale ZnO particles on the surface of ZBRC. The removal rate of TCE decreased with an increase in the initial concentration of TCE because of both inhibited generation of electron-hole pairs and deficiency of photons to activate ZnO particles. Also, the TCE removal rate increased as the loading amount of ZBRC increased. Based on satisfactory linear regressions (R 2 ≥ 0.94) between the apparent degradation rate constant (K app ) and the initial concentration vs. the ZBRC loading amount, the K app values can be estimated, a priori, without performing photocatalytic experiments. The removal efficiencies were more significantly affected by the changes in the initial concentration of TCE and the ZBRC loading amounts than by the changes in light intensity and pH in aqueous solutions. From the results of response surface analysis, the greater removal efficiencies of TCE were achieved with higher pH values, greater amounts of ZBRC, and greater intensity of light. Based on these results, newly-developed ZBRC with both high removal efficiency and low cost performs as a valid alternative to TiO 2 particles or immobilized TiO 2 for the mineralization of chlorinated hydrocarbons in various environmental and industrial matrices.

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Section: Effect Of Phmentioning

confidence: 77%

Enhanced Removal of Trichloroethylene in Water Using Nano-ZnO/Polybutadiene Rubber Composites

et al. 2016

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“…) of the as-synthesized powders were calculated using Equation (4) [19] 269 -Fe) remarkable shift to the visible region relative to the pure ZnO (C1). The presence of the narrow band gap hematite could be the reason for the formation of narrow band gap heterojunctions.…”

Section: Absorption Spectra Analysismentioning

confidence: 99%

Natural pigment sensitized solar cells based on ZnO-TiO2-Fe2O3 nanocomposite in quasi-solid state electrolyte system

Mebrahtu¹,

Taddesse²,

Goro³

et al. 2017

Bull. Chem. Soc. Eth.

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ABSTRACT. Nanocomposites of Zn-Ti-Fe oxide using zinc as a host with different ratios of precursor salts were prepared by co-precipitation method to use as semiconductors for dye sensitized solar cell (DSSC). The assynthesized nanocomposites were characterized using XRD, SEM-EDX, TEM and UV-Vis spectrophotometer. DSSCs based on the new semiconductors and di-tetrabutylammoniumcis-bis(isothiocyanato)bis(2,2'-bipyridyl-4,4'-dicarboxylato)-ruthenium(II) (N719) dye has been constructed and characterized. Stability towards dissolution of deposited films of semiconductors in the acidic dye and conversion efficiency was obtained in the order of: ZnO(100%)

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“…Further reduction in the band gap of the Cr-N co-doped ZnO might be due to the synergetic effect of the two dopants. The band gap energy (Eg) of the as-synthesized photocatalysts was calculated using the equation depicted below [24]:…”

Section: Uv-vis Absorption Spectramentioning

confidence: 99%

Cr-N co-doped ZnO nanoparticles: synthesis, characterization and photocatalytic activity for degradation of thymol blue

Nibret¹,

Yadav²,

Dı́az³

et al. 2015

Bull. Chem. Soc. Eth.

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ABSTRACT.Here we report the synthesis of CrN co-doped ZnO for the first time. Zinc oxide (ZnO) nanoparticles were synthesized by direct precipitation method via the reaction between zinc nitrate [Zn(NO3)2 .6H2O] and ammonium carbonate [(NH4)2CO3] in aqueous solutions with proper concentration. Modified photocatalysts were synthesized by the incipient wetness impregnation method (chromium-doped ZnO) and by solid state reactions using ZnO and urea as precursors (nitrogen-doped ZnO). Chromium-nitrogen co-doped ZnO nanomaterials were prepared from the already prepared N-doped ZnO nanomaterials via one step impregnation method. The as-synthesized photocatalysts were investigated by XRD, BET, SEM-EDX, FTIR, and UV-Vis techniques. Photocatalytic degradation of thymol blue using as-synthesized photocatalysts was studied under visible as well as UV irradiations. Highest photocatalytic degradation efficiency of chromium-nitrogen co-doped zinc oxide could be attributed to the lower rate of recombination of the photo-generated electrons and holes as well as to its lower band gap energy as the result of the co-doping. Photocatalytic degradation is found to follow pseudo first order kinetics.

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Photocatalytic degradation of ciprofloxacin drug in water using ZnO nanoparticles

Cited by 257 publications

References 35 publications

Enhanced Removal of Trichloroethylene in Water Using Nano-ZnO/Polybutadiene Rubber Composites

Enhanced Removal of Trichloroethylene in Water Using Nano-ZnO/Polybutadiene Rubber Composites

Natural pigment sensitized solar cells based on ZnO-TiO2-Fe2O3 nanocomposite in quasi-solid state electrolyte system

Cr-N co-doped ZnO nanoparticles: synthesis, characterization and photocatalytic activity for degradation of thymol blue

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