Degradation of selected industrial dyes using Mg-doped TiO2 polyscales under natural sun light as an alternative driving energy

Shivaraju, Harikaranahalli Puttaiah; Midhun, G.; Kumar, Kuldeep; Pallavi, S; Pallavi, Nagaraju; Shahmoradi, Behzad

doi:10.1007/s13201-017-0546-0

Cited by 46 publications

(32 citation statements)

References 43 publications

(47 reference statements)

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“…Same procedure was used to prepare CeO 2 /AC composites by varying the weight ratios of AC from 0 to 80%. The CeO 2 /AC composites prepared were characterized by analytical techniques like UV-Vis spectroscopy, powder X-ray spectroscopy, scanning electron microscopy, Fourier infrared spectroscopy, dynamic light scattering and photocatalytic activity under different photon sources (Shivaraju et al 2017).…”

Section: Preparation and Characterization Of Ceo 2 /Ac Compositesmentioning

confidence: 99%

“…Photocatalytic treatment of real-time industrial wastewater, which was collected from textile industry, was determined using CeO 2 / AC composites under LED light source for 5-h duration. Degradation rate of organic pollutants including dyes was evaluated by the determination of the initial and final COD value of industrial wastewater (Shivaraju et al 2017).…”

Section: Photocatalytic Degradation Of Industrial Dyesmentioning

confidence: 99%

“…Under acidic condition, the perhydroxyl radicals can form hydrogen peroxide, which further gives rise to Fig. 7 Photocatalytic degradation of industrial dyes using CeO 2 /AC composites the hydroxyl radicals (Shivaraju et al 2017). The hydroxyl group on the CeO 2 /AC composite surface undergoes the acid-base equilibrium as shown in Eqs.…”

Section: Effect Of the Initial Phmentioning

confidence: 99%

“…The optimal load was found to be 0.015 g/50 ml, and there was no significant change in degradation efficiency beyond 0.015 g of catalyst load. The possible reason was the increased number of active sites on the surface of catalyst suspended for photoreaction, which in turn increases the rate of radical formation in an aqueous solution (Shivaraju et al 2017).…”

Section: Effect Of Photocatalyst Loadmentioning

confidence: 99%

“…The results obtained suggested as the number of reuse cycles increased, the photodegradation efficiency of composites was reduced. This could be due to the aggregation and sedimentation of dye around composites (Shivaraju et al 2017).…”

Section: Reusability Studymentioning

confidence: 99%

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Preparation and characterization of cost-effective AC/CeO2 nanocomposites for the degradation of selected industrial dyes

et al. 2019

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With an increasing global usage of dyes and colorants in various industries, the increase in dye contamination level in water has frequently reported. Developments of appropriate techniques for the degradation of dyes in industrial wastewater are critical and urgently required. Utilization of low-cost materials for the treatment of various dyes using an alternative driving energy could be promising in near future. In the study, activated carbon (AC) was prepared using agricultural waste (coconut shell) and utilized for designing the CeO 2 /AC composites using soft chemical route. The effect of AC on the composite was studied by varying the AC and CeO 2 weight ratios, and as-prepared photocatalytic composites were characterized using suitable analytical techniques. Characterization results clearly indicated a remarkable impact of AC on porosity and surface area, surface morphology, structural and textural properties and photocatalytic activities of the composites. Complete removal of industrial dyes used in aqueous media was observed and 91.3% of degradation efficiency of organic pollutants in real-time textile industrial wastewater within 5 h under LED light source. Reusability study clearly indicated that CeO 2 / AC composites could be reused up to three cycles for the removal of organic pollutants and dyes in aqueous media under visible light source as an alternative driving energy.

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Section: Preparation and Characterization Of Ceo 2 /Ac Compositesmentioning

confidence: 99%

Section: Photocatalytic Degradation Of Industrial Dyesmentioning

confidence: 99%

Section: Effect Of the Initial Phmentioning

confidence: 99%

Section: Effect Of Photocatalyst Loadmentioning

confidence: 99%

Section: Reusability Studymentioning

confidence: 99%

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Preparation and characterization of cost-effective AC/CeO2 nanocomposites for the degradation of selected industrial dyes

et al. 2019

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Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Shivaraju¹,

Anilkumar²,

Yashas³

et al. 2020

Biofuels Bioprod Bioref

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The development of improved catalysts for the hydrogenation of CO2 into methane is a sustainable response to the energy crisis and environmental problems at the global level. Mn‐Ce/N‐TiO2 heterojunctions, comprising a Mn‐Ce concretion composite, were prepared using a sol–gel technique, and the photocatalytic hydrogenation of CO2 was studied using visible light as alternative driving energy. The photocatalyst composite was characterized, and synergistic effects on the photocatalytic hydrogenation of CO2 into methane were investigated. The characterization results confirmed that there was a considerable shifting of band‐gap energy towards the visible range with required properties, which enhances photocatalytic activities under natural sunlight. Carbon dioxide hydrogenation and its potential for conversion into methane was evaluated using a specially designed photoreactor and different light sources. The results show a CO2 hydrogenation rate of about 16.8% ±0.2 in a visible light‐assisted catalytic reduction process in 60 min. The irradiation time and light source were studied and significant impacts on CO2 hydrogenation were observed under a LED light source and with H2O vapor as a reducing agent (up to 23.4% ± 0.2). The effect of photocatalysis on the methane yield in the anaerobic digestion (biomethanation) process was evaluated and a potential methane yield of up to 13.5% within 24 h was observed. The results suggested promising and sustainable applications of the Mn‐Ce/N‐TiO2 heterojunction composite for CO2 hydrogenation and for the conversion of CO2 into fuel and methane in the biomethanation process. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd

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Structural and optical properties of Ti and Cu co‐doped ZnO thin films for photovoltaic applications of dye sensitized solar cells

et al. 2020

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Summary ZnO, 1% Ti doped ZnO and 1% Ti and (0.5%, 1%, and 1.5%) Cu co‐doped ZnO thin films are deposited on fluorine doped tin oxide glass substrates using sol‐gel technique. The impact of Ti and Cu co‐doping on optical, structural, and photovoltaic properties of ZnO thin films have been analyzed. X‐ray diffraction also confirms the hexagonal wurtzite crystal structure of the film. The 1% Ti and 1% Cu co‐doping percentage has an astonishing impact on the structural properties of the doped film, such as large grain size (19 nm), d‐spacing (2.48 Å), small dislocation line density (2.96 × 1015 m−2), lattice parameters (a = b = 3.2 Å, c = 5.2 Å), bond length (1.9 Å) and positional parameter (3.7 × 10−1) of the ZnO thin film. Optical parameters like reflectance, absorbance, transmittance, refractive index, and dielectric constants are calculated in the range of spectral from (250‐750) nm by using an ultraviolet ‐ visible spectrophotometer. In the visible region, all the films have approximately 85% transmittance, which is excellent for solar cells. The ZnO film prepared at the co‐doping percentage of 1% Ti and 1% Cu has high absorbance, high refractive index (2.09) and small band gap energy (3.37 eV) as compared to other doped films. The dye‐sensitized solar cells of these films as a Photoanode have been fabricated and studied the efficiency variation of films. It is found that the performance of the dye‐sensitized solar cell (DSSC) using a Ti‐Cu co‐doped film is much better than a pure ZnO film. The highest efficiency of DSSC 2.38% is achieved in the dye‐sensitized solar cell by using a 1% Ti and 1% Cu co‐doped ZnO thin film. When Ti is doped in ZnO then the surface area and pore size of the ZnO increased, which increase the dye loading ability. Cu reduces the recombination rate and enhances the electron injection efficiency rate from the dye to the conduction band of ZnO. Therefore, it is suggested that the thin films prepared by co‐doping of Cu and Ti into ZnO will upgrade the efficiency of cell.

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Degradation of selected industrial dyes using Mg-doped TiO2 polyscales under natural sun light as an alternative driving energy

Cited by 46 publications

References 43 publications

Preparation and characterization of cost-effective AC/CeO2 nanocomposites for the degradation of selected industrial dyes

Preparation and characterization of cost-effective AC/CeO2 nanocomposites for the degradation of selected industrial dyes

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Structural and optical properties of Ti and Cu co‐doped ZnO thin films for photovoltaic applications of dye sensitized solar cells

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Degradation of selected industrial dyes using Mg-doped TiO2 polyscales under natural sun light as an alternative driving energy

Cited by 46 publications

References 43 publications

Preparation and characterization of cost-effective AC/CeO2 nanocomposites for the degradation of selected industrial dyes

Preparation and characterization of cost-effective AC/CeO2 nanocomposites for the degradation of selected industrial dyes

Facile synthesis of Mn‐Ce/N‐TiO2 composite for CO2 hydrogenation into methane and intensifying methane yield in biomethanation

Structural and optical properties of Ti and Cu co‐doped ZnO thin films for photovoltaic applications of dye sensitized solar cells

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Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation