Kinetic evaluation of ZnO/TiO2 thin film photocatalyst in photocatalytic degradation of Orange G

Tekin, Derya; Kızıltaş, Hakan; Ungan, Hande

doi:10.1016/j.molliq.2020.112905

Cited by 91 publications

(38 citation statements)

References 25 publications

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“…Those dye are difficult to degrade to be a severe issue for environmental and human health. The increased contaminant compounds in wastewater are interested researchers in finding the polluted water treatment method to provide clean and healthy water [11].…”

Section: Introductionmentioning

confidence: 99%

“…Water purification methods were varied through a physical, biological, and chemical process [12,13]. The photocatalyst is one of the most effective and simple techniques used in water treatment because it removes organic contaminants easily [11,14,15]. Green synthesis is used as an alternative method to produce nanoparticles for photocatalyst applications.…”

Section: Introductionmentioning

confidence: 99%

“…For the temperature increases from 500 o C to 600 o C, the diffraction peaks intensity of ZnTiO3 were decrease and the phase transformation occurred at the temperature 800 o C clearly can be seen the intensity of ZnTiO3 decreases and Zn2TiO4 increase. It shows that some of the ZnTiO3 phase were decomposed to forming Zn2TiO4 phase as can be seen at the diffraction peaks 32.24 o , 34.90 o , 36.82 o , and 56.96 o based on the JCPDS: 01-073-0578[11,14,58]. The peak intensities decrease and the width of FWHM increase by increasing the calcination temperature from 600 o C to 700 o C may due to the crystallite size or the interatomic spacing decreased[14,59].…”

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confidence: 99%

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Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Rusman

Heryanto

et al. 2021

Preprint

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Composite ZnO/TiO2 have been successfully synthesized by green synthesis method with various calcination temperature 500oC, 600oC, 700oC, and 800oC (TiO2 concentrations: 2.5 g and 5 g) for photocatalyst application. In this study, Calopogonium mucunoides leaf extract was used as reducing and stabilizing agent. The synthesized composites were characterized by using Fourier Transform Infra-Red (FTIR), X-Ray Diffraction (XRD), and UV-Visible spectroscopy. The XRD spectra shows the hexagonal phase with wurtzite structure of ZnO and anatase for TiO2. The best degradation performance is 98.26% (only 10 min) for ZnO/TiO2 (5 g) with calcination temperature is 800oC. This is due to the highest distance between two optical phonon mode Δ(LO-TO) and lowest attenuating and propagating constant. The composite ZnO/TiO2 shows high potentials photodegradation of organic dyes with the high stable recyclability up to 5 cycles (> 95%) only for every 15 minutes. High potentials for applicability with the concept environmentally friendly principles and stability for circular chemistry, and efficiency of use the energy and chemicals.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Rusman

Heryanto

et al. 2021

Preprint

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“…The photodegradation of Acid Orange G (OG) dye under simulated solar radiation was studied as a reaction model for the catalysts screening. The selected azo dye is typically used in the paper and textile industry showing carcinogenic and mutagenic activity [41][42][43][44]. The optimization of experimental conditions (i.e., pH), the identification of photoactive species, as well as the stability of materials was also evaluated.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Graphene Derivatives and TiO2 for High Visible Light Photodegradation of Azo Dyes

et al. 2020

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Functionalized graphene derivatives including graphene oxide (GO), reduced graphene oxide (rGO), and heteroatom (nitrogen/sulphur (N/S) or boron (B))-doped graphene were used to synthesize composites with TiO2 (T). The photocatalytic performance of composites was assessed for the degradation of Orange G dye (OG) under simulated solar light. All the prepared graphene derivatives—TiO2 composites showed better photocatalytic performance than bare TiO2. A higher photocatalytic activity was found for the composites containing GO and N/S co-doped rGO (kapp = 109.2 × 10−3 and 48.4 × 10−3 min−1, for GO-T and rGONS-T, respectively). The influence of both initial solution pH and the reactive species involved in the OG degradation pathway were studied. The photocatalytic activity of the samples decreased with the increase of the initial pH (from 3.0 to 10.0) due to the occurrence of electrostatic repulsive forces between the photocatalysts surface and the molecules of OG, both negatively charged. The use of selective scavengers showed that although the photogenerated holes dominate the degradation mechanism, radicals and singlet oxygen also participate in the OG degradation pathway. In addition, reutilization experiments indicated that the samples were stable under the reaction conditions used.

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“…The enhanced optical absorption was found at boron and nitrogen co-doped TiO2 synthesized by the sol-gel method [12]. The ZnO/TiO2 solution of the thin film prepared and photocatalytic activities were investigated recently [13]. The decrease in optical bandgap energy of Cu doped TiO2 was reported [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Gd doped TiO2 Thin Film for Photocatalytic Degradation of Malachite Green

Eskalen

Kerli²

2020

Sakarya University Journal of Science

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In this research work, a simple spray pyrolysis method was employed to synthesized gadolinium (Gd) doped titanium oxide (TiO2) thin film. The crystal structure and morphology of the sample was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). According to XRD measurements, no apparent crystal peak was observed. The thickness of the prepared film was found to be 228 nm from SEM observation. The optical transmittance and bandgap energy of the synthesized thin film was investigated by using UV-Vis spectroscopy. The high transmission of the thin film was found in the visible region. The optical bandgap energy of the prepared film was found to be 2.85 eV. The photocatalytic degradation of malachite green solution was studied. As a result of the photocatalytic experiment, the thin film could be used as an effective photocatalyst for malachite green dye.

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Kinetic evaluation of ZnO/TiO2 thin film photocatalyst in photocatalytic degradation of Orange G

Cited by 91 publications

References 25 publications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Functionalized Graphene Derivatives and TiO2 for High Visible Light Photodegradation of Azo Dyes

Synthesis of Gd doped TiO2 Thin Film for Photocatalytic Degradation of Malachite Green

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