Photocatalytic degradation for environmental applications – a review

Bhatkhande, Dhananjay; Pangarkar, Vishwas G.; Beenackers, A.A.C.M.

doi:10.1002/jctb.532

Cited by 1,216 publications

(636 citation statements)

References 80 publications

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“…However, the photocatalytic degradation of PCP could occur in the presence of high n-TiO 2 concentrations (200 mg/L) under UV illumination condition (450 W), via generation of ROS (e.g., hydroxyl radical) to attack para position of the PCP ring to form a semiquinone radical, which in turn disproportionates to yield detected metabolic products (e.g., p-chloranil and tetrachlorohydroquinone) [37]. Likewise, there is ample evidence to indicate that photocatalytic degrade organic compounds are most likely driven by a UV-induced (especially at 300-388 nm) formation of ROS by n-TiO 2 [14,47,48]. For toxicity assay using aquatic organisms, typical laboratory lighting cycle is usually established by employing fluorescent lamps, which mainly emit visible light.…”

Section: Discussionmentioning

confidence: 99%

Effect of titanium dioxide nanoparticles on the bioavailability, metabolism, and toxicity of pentachlorophenol in zebrafish larvae

Fang

Shi

Zhang

et al. 2015

Journal of Hazardous Materials

138

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Section: Discussionmentioning

confidence: 99%

Effect of titanium dioxide nanoparticles on the bioavailability, metabolism, and toxicity of pentachlorophenol in zebrafish larvae

Fang

Shi

Zhang

et al. 2015

Journal of Hazardous Materials

138

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“…The band gap energies were calculated using cut-off wavelength and are represented in the following table. The band gap energy is calculated using the following equation (Bhatkhande et al 2002):…”

Section: Uv-visible Diffusion Reflectance Spectroscopy (Uv-drs)mentioning

confidence: 99%

Synthesis, characterization and photocatalytic applications of Zn-doped TiO2 nanoparticles by sol–gel method

Aware¹,

Jadhav²

2015

Appl Nanosci

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Mesoporous, nanocrystalline, Zinc-doped TiO 2 nanoparticles were synthesized by surfactant-assisted solgel method. The X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), and UV-VIS spectrometer techniques were used to characterize the synthesized products. XRD results confirm the formation of the anatase phase for the TiO 2 nanoparticles, with crystallite sizes in the range of 12.6-18.1 nm. The small crystallite size and doping with Zinc ion inhibit phase transformation and promote the growth of the TiO 2 anatase phase. The SEM and TEM micrographs revealed the spherical-like morphology with average diameter of about 12-18 nm which is in agreement with XRD results. The optical study shows that doping ions lead to an increase in the absorption edge wavelength and a decrease in the band gap energy of titania. Photocatalytic activity of the synthesized nanomaterials was successfully tested for photodegradation of methyl red as model pollutant under UV light. The photocatalytic activity results confirm that the doped nanoparticles show higher activity than undoped titania. The small grain size, high crystallinity, high specific surface area and decrease in the band gap energy of doped titania may be responsible for the high photocatalytic activity.

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“…Heterogeneous photocatalytic reactions are carried out either in a slurry-type reactor where the catalyst particles are suspended in the contaminated water or in an immobilized-type reactor where the catalyst particles are immobilized onto the surface of various inert substrates of various types and configurations [9][10][11] and the process can be explained on the basis of the following mechanism.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Photocatalysis: Recent Advances and Applications

2013

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Semiconductor heterogeneous photocatalysis, the subject of this review, is a versatile, low-cost and environmentally benign treatment technology for a host of pollutants. These may be of biological, organic and inorganic in origin within water and air. The efficient and successful application of photocatalysis demands that the pollutant, the catalyst and source of illumination are in close proximity or contact with each other. The ability of advanced oxidation technology to remove low levels of persistent organic pollutants as well as microorganisms in water has been widely demonstrated and, progressively, the technology is now being commercialized in many areas of the world including developing nations. This review considers recent developments in the research and application of heterogeneous semiconductor photocatalysis for the treatment of low-level concentrations of pollutants in water and air using titanium dioxide as a "model" semiconductor. The review considers charge transport characteristics on the semiconductor surface, photocatalyst reactor design and organic degradation mechanistic pathways. The effects of photoreactor operating parameters on the photocatalytic process are discussed in addition to mineralization and disinfection kinetics.

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Photocatalytic degradation for environmental applications – a review

Cited by 1,216 publications

References 80 publications

Effect of titanium dioxide nanoparticles on the bioavailability, metabolism, and toxicity of pentachlorophenol in zebrafish larvae

Effect of titanium dioxide nanoparticles on the bioavailability, metabolism, and toxicity of pentachlorophenol in zebrafish larvae

Synthesis, characterization and photocatalytic applications of Zn-doped TiO2 nanoparticles by sol–gel method

Heterogeneous Photocatalysis: Recent Advances and Applications

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