Photocatalytic Treatment of Rhodamine 6G in Wastewater Using Photoactive ZnO

Lutic, Doina; Coromelci, Cristina; Creţescu, Igor; Poulios, Ioannis; Stan, Cristinel Ionel

doi:10.1155/2012/475131

Cited by 33 publications

(10 citation statements)

References 26 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XRD patterns reveal that both as-synthesized and calcined samples display mostly the characteristic peaks due to zinc oxide [21][22][23]. Indeed, intense and narrow maxima appear at 31.8, 34.4, 36.3, 47.9, 56.6, 63 and 68 • , assigned to the (100), (002), (101), (102), (110), (103) and (112), respectively, as filed in (Joint Committee on Powder Diffraction Standards-JCPDS: 89-7102).…”

Section: Powder Xrdmentioning

confidence: 99%

Zn/La Mixed Oxides Prepared by Coprecipitation: Synthesis, Characterization and Photocatalytic Studies

et al. 2020

Self Cite

View full text Add to dashboard Cite

Mixed oxides containing zinc and lanthanum were prepared by coprecipitation in alkaline medium, followed by calcination at 400 °C. The initial precipitation product and the calcined form were characterized by Brunauer–Emmett–Teller (BET) method adsorption of nitrogen at −196 °C, Scanning Electron Microscopy/Electron-Probe Microanalysis (SEM/EPM), Ultraviolet - Diffuse Reflectance Spectroscopy (UV-DRS) and Infrared (IR) spectroscopy. The band gap slightly changes from 3.23 eV to 3 eV by calcination. The photocatalytic performance of the solids were investigated in diluted aqueous medium, by using clofibric acid (CA), a stable and toxic molecule used as precursor in some pesticides and drugs, as test compound, possibly found in the wastewaters in low concentrations. The effects of the degradation extent, determined by high performance liquid chromatography (HPLC) and total organic carbon (TOC) measurements, were investigated at different initial concentrations of CA. Within about 60 min the CA degradation is almost total at low concentration values (3 ppm) and reaches over 80% in 180 min for an initial concentration of 50 ppm. Moreover, the CA removal performance of photocatalyst remains excellent after three cycles of use: the removal yield was practically total after 60 min in the first two cycles and reached 95% even in the third cycle.

show abstract

Section: Powder Xrdmentioning

confidence: 99%

Zn/La Mixed Oxides Prepared by Coprecipitation: Synthesis, Characterization and Photocatalytic Studies

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Rhodamine 6G (Rh 6G) acts as a model dye in the assessment of the photocatalytic activity of the functionalized beads. Rhodamine 6G was chosen since it is a chemically stable organic dye which is difficult to degrade [24]. Thus, it is important to find a photocatalyst that can degrade this dye into biodegradable species as is the aim of the work.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic behaviour of zinc tetraamino phthalocyanine-silver nanoparticles immobilized on chitosan beads

Khoza

Nyokong

2015

Journal of Molecular Catalysis A: Chemical

View full text Add to dashboard Cite

“…The structural details presented in Figure 1 and Table 1 indicate that the use of organic solvents generates powder diffraction patterns with rough baseline and low intensity, wide peaks, characteristic to the presence of large ratios of amorphous solid. The positions of the maxima prove that the LDH structure was formed in all samples, as shown by the presence of [ [14]. The values of the "a" and "c" parameters, calculated for the rhombohedral symmetry, indicate that the thickness of the brucite-type layer varies very little with the solvent.…”

Section: Structural Characterizationmentioning

confidence: 69%

Fabrication of Zinc-Iron-Aluminum Layered Double Hydroxides with Controlled Micromorphology in a Tailored Aqueous - Organic Synthesis Medium

Stanciulescu¹,

Cârjă²,

Lutic³

2020

Rev. Chim.

Self Cite

View full text Add to dashboard Cite

Micromorphology characteristics of layered double hydroxides are important to establish their performances to act as adsorbents and catalysts/photocatalysts. Herein, we report the fabrication of ZnFeAl layered double hydroxides (LDHs) (defined by a molar ratios Zn/Fe/Al 2/0.5/0.5), in a tailored aqueous-organic synthesis medium, by using the coprecipitation method. The nature of the organic solvent (e.g.: ethanol, ethyl acetate, glycerol and toluene) was used as a controlled variable for obtaining specific morphology characteristics of ZnFeAl. XRD, FTIR, UV-Vis-DR spectroscopy and SEM microscopy have been used to characterize the structural, optical and textural features of ZnFeAl. Results show that the controlled aqueous-organic synthesis medium established important changes in the structural features and the micromorphology characteristics (e.g.: particle sizes and their interconnection patterns) of ZnFeAl, as indicated by the results of XRD and SEM analyses. The FTIR spectra revealed that most of the interlayer anions are carbonate, even though the initial salts precursors contain nitrates or sulfates anions. Furthermore, the UV-Vis-DR results underline that the band gaps of the LDH derived oxides changed in a significant manner, as a function of the nature of the organic solvent. Such that, ZnFeAl prepared in the presence of ethanol and ethyl acetate show band gap values lower than 3 eV and thus could be better activated under visible light. These results should be inspiring for fabricating layered double hydroxides with a controlled micromorphology for specific applications for environmental cleanup.

show abstract

Photocatalytic Treatment of Rhodamine 6G in Wastewater Using Photoactive ZnO

Cited by 33 publications

References 26 publications

Zn/La Mixed Oxides Prepared by Coprecipitation: Synthesis, Characterization and Photocatalytic Studies

Zn/La Mixed Oxides Prepared by Coprecipitation: Synthesis, Characterization and Photocatalytic Studies

Photocatalytic behaviour of zinc tetraamino phthalocyanine-silver nanoparticles immobilized on chitosan beads

Fabrication of Zinc-Iron-Aluminum Layered Double Hydroxides with Controlled Micromorphology in a Tailored Aqueous - Organic Synthesis Medium

Contact Info

Product

Resources

About