Novel thin‐film reactor for photocatalytic degradation of pesticides in an aqueous solution

Shankar, M.V.; Anandan, Sambandam; Venkatachalam, N.; Arabindoo, Banumathi; Murugesan, V.

doi:10.1002/jctb.1124

Cited by 64 publications

(21 citation statements)

References 24 publications

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“…Many research works have been reported in immobilizing the nanoparticles onto solid matrices (Li et al 2012c;Wang et al 2012;Zhang et al 1994). Photon conversion efficiency and mass transfer (Chan et al 2003;Shankar et al 2004) are the two important properties to be considered for the reactor design. The complex physical and chemical phenomena are involved in the interactions between the photons, catalyst and reactants which make modeling difficult.…”

Section: Nanophotocatalytic Reactorsmentioning

confidence: 99%

“…Researchers have developed models based on absorption scattering model of two-flux and sixflux theories. Dual slant-placed electrodes thin-film PC reactor (Xu et al 2013), solar PC thin-film cascade reactor (Chan et al 2003), dual rotating disk PC reactor (Shankar et al 2004), thin-film photoelectrocatalytic reactor (Xu et al 2009) and spinning disk reactor (Boiarkina et al 2013) have been developed in the recent years for the degradation of industrial pollutants. Though the …”

Section: Nanophotocatalytic Reactorsmentioning

confidence: 99%

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Advanced approach for degradation of recalcitrant by nanophotocatalysis using nanocomposites and their future perspectives

Padmanaban¹,

Nandagopal

Priyadharshini³

et al. 2016

Int. J. Environ. Sci. Technol.

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Industrial effluents containing persistent pollutants play a significant role in environmental pollution. Classical techniques such as chlorination, coagulation, ion flotation, membrane process and sedimentation that have been used to decontaminate polluted water are incapable of efficient degradation due to the generation of secondary pollutants. Photocatalysis, an advanced oxidation process in which the photoreaction is accelerated by the irradiation of catalyst, has shown efficient degradation of recalcitrant in water system. Usage of nanoparticles as homogenous photocatalyst has become prevalent due to their improved properties such as large surface-to-volume ratio, controlled uniform particle size and its composition which enhances the degradation rate. The recombination of holes and electron pair which is considered to be the limitation in homogenous system can be overcome by nanocomposites or heterogeneous photocatalysts. This system decreases the rate of recombination, leading to effective degradation of individual pollutants because of their enhanced physicochemical and structural properties. In recent years, heterogeneous nanophotocatalytic processes employing titanium dioxide (TiO 2 ) and zinc oxide (ZnO) composites have gained immense research interest as an effective wastewater treatment method because of its efficacy in decomposing and mineralizing the hazardous organic and inorganic pollutants utilizing the UV and visible photons.This paper reviews about the process, synthesis and parameters influencing photocatalytic reaction and their kinetics with much emphasize on types of nanoparticles and nanocomposites and its application in wastewater treatment.

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Section: Nanophotocatalytic Reactorsmentioning

confidence: 99%

Section: Nanophotocatalytic Reactorsmentioning

confidence: 99%

Advanced approach for degradation of recalcitrant by nanophotocatalysis using nanocomposites and their future perspectives

Padmanaban¹,

Nandagopal

Priyadharshini³

et al. 2016

Int. J. Environ. Sci. Technol.

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“…pH is an important parameter in photocatalytic reactions since it exhibits profound influence on TiO 2 surface charge and adsorption ability [18]. Therefore, the role of pH on the photocatalytic decomposition of K-6G and MB 7 by 0.07% MWCNTs/TiO 2 catalyst is studied at the pH range of 1.0-13.2 by keeping all other experimental conditions constant.…”

Section: Effect Of Phmentioning

confidence: 99%

Solar photocatalytic decomposition of two azo dyes on multi-walled carbon nanotubes (MWCNTs)/TiO2 composites

Wang

et al. 2010

Front. Environ. Sci. Eng. China

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Multi-walled carbon nanotubes (MWCNTs)/ TiO 2 composite photocatalysts with high photoactivity were prepared by sol-gel process and further characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), and UV-vis absorption spectra. Compared to pure TiO 2 , the combination of MWCNTs with titania could cause a significant absorption shift toward the visible region. The photocatalytic performances of the MWCNTs/TiO 2 composite catalysts were evaluated for the decomposition of Reactive light yellow K-6G (K-6G) and Mordant black 7 (MB 7) azo dyes solution under solar light irradiation. The results showed that the addition of MWCNTs enhanced the adsorption and photocatalytic activity of TiO 2 for the degradation of azo dyes K-6G and MB 7. The effect of MWCNTs content, catalyst dosage, pH, and initial dye concentration were examined as operational parameters. The kinetics of photocatalytic degradation of two dyes was found to follow a pseudo-first-order rate law. The photocatalyst was used for seven cycles with photocatalytic degradation efficiency still higher than 98%. A plausible mechanism is also proposed and discussed on the basis of experimental results.

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“…Successful results were reported for the degradation of some herbicides, such as dicamba (Prevot et al, 2001), 2,4-D (Herrmann and Guillard, 2000), atrazine (Zhanqi et al, 2007), and some pesticides, such as cyproconazole (Lhomme et al, 2007), carbofuran (Mahalakshmi et al, 2007), dichlorvos (Evgenidou et al, 2005), and 2,4-dichlorophenoxyacetic, also known as DPA (Shankar et al, 2004). To improve the action of nanomaterials, not only under UV light but also under visible light, nanomaterials were doped Wang et al, 2010) obtaining better antibacterial properties than in undoped materials (Dunnill et al, 2009;Shieh et al, 2006).…”

Section: Nanotechnologies For Water Purificationmentioning

confidence: 99%

Advances of nanotechnology in agro-environmental studies

et al. 2013

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With the increase in the world population and the demand for food, new agricultural practices have been developed to improve food production through the use of more effective pesticides and fertilisers. These technologies can lead to an uncontrolled release of undesired substances into the environment, with the potential to contaminate soil and groundwater. Today, nanotechnology represents a promising approach to improve agricultural production and remediate polluted sites. This paper reviews the recent applications of nanotechnologies in agro-environmental studies with particular attention to the fate of nanomaterials once introduced in water and soil, to the advantages of their use and their possible toxicology. Findings show that the use of nanomaterials can improve the quality of the environment and help detect and remediate polluted sites. Only a small number of nanomaterials demonstrated potential toxic effects. These are discussed in detail.

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Novel thin‐film reactor for photocatalytic degradation of pesticides in an aqueous solution

Cited by 64 publications

References 24 publications

Advanced approach for degradation of recalcitrant by nanophotocatalysis using nanocomposites and their future perspectives

Advanced approach for degradation of recalcitrant by nanophotocatalysis using nanocomposites and their future perspectives

Solar photocatalytic decomposition of two azo dyes on multi-walled carbon nanotubes (MWCNTs)/TiO2 composites

Advances of nanotechnology in agro-environmental studies

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