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

Padmanaban, V. C.; Nandagopal, M. S. Giri; Priyadharshini, G. Madhangi; Maheswari, N. Uma; Sree, G. Janani; Selvaraju, N.

doi:10.1007/s13762-016-1000-9

Cited by 51 publications

(10 citation statements)

References 106 publications

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“…Such structures possess increased photocatalytic properties because of band alignment, multiple reflections, and scattering of light. Hierarchical photocatalysts can be organized in brunch, brush-like, dendritic, tree-like, urchin-like, flower-like, photonic crystals or macro and mesoporous structures (Padmanaban et al 2016 ; Li et al 2016 ).…”

Section: Environmental Aspects Of Photodegradationmentioning

confidence: 99%

Studies on photodegradation process of psychotropic drugs: a review

Trawiński

Skibiński

2016

Environ Sci Pollut Res

105

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Consumption of psychotropic drugs is still increasing, especially in high-income countries. One of the most crucial consequences of this fact is significant release of them to the environment. Considerable amounts of atypical antipsychotics, benzodiazepines, antidepressants, and their metabolites were detected in river, lake, and sea water, as well as in tissues of aquatic organisms. Their ecotoxicity was proved by numerous studies. It should be noticed that interaction between psychotropic pharmaceuticals and radiation may lead to formation of potentially more toxic intermediates. On the other hand, photo-assisted wastewater treatment methods can be used as an efficient way to eliminate them from the environment. Many methods based on photolysis and photocatalysis were proposed and developed recently; nevertheless, the problem is still unsolved. However, according to recent studies, photocatalysis could be considered as the most promising and far more effective than regular photolysis. An overview on photolytic as well as homogenous and heterogeneous photocatalytic degradation methods with the use of various catalysts is presented. The photostability and phototoxicity of pharmaceuticals were also discussed. Various analytical methods were used for the photodegradation research, and this issue was also compared and summarized. Use of high-resolution multistage mass spectrometry (Q-TOF, ion trap, Orbitrap) was suggested. The combined techniques such as LC–MS, GC–MS, and LC–NMR, which enable qualitative and quantitative analyses in one run, proved to be the most valuable in this case. Assembling of MS/MS spectra libraries of drug molecules and their phototransformation products was identified as the future challenge.

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Section: Environmental Aspects Of Photodegradationmentioning

confidence: 99%

Studies on photodegradation process of psychotropic drugs: a review

Trawiński

Skibiński

2016

Environ Sci Pollut Res

105

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“…This process is based on the generation of highly reactive • OH radicals, which are able to fully oxidize organic molecules. Heterogeneous photocatalysis process has shown to be efficient in the degradation of organic pollutants in water, avoiding the transport and use of potentially hazardous materials, such as acids or H 2 O 2 , while the catalyst can be recovered and reused in several cycles [8,9].…”

Section: Introductionmentioning

confidence: 99%

TiO2-Low Band Gap Semiconductor Heterostructures for Water Treatment Using Sunlight-Driven Photocatalysis

Angel¹,

Durán–Álvarez²,

Zanella³

2018

Titanium Dioxide - Material for a Sustainable Environment

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Heterogeneous photocatalysis is a promising advanced oxidation process for water purification, given its potential to fully oxidize organic pollutants and to inactivate microorganisms. Due to its versatility and high performance in a broad range of conditions, titanium dioxide (TiO 2)-based photocatalysis has been systematically used at laboratory scale to treat water of different quality. Even though TiO 2 is an exceptional photocatalyst, its broad band gap value (3.2 eV) makes necessary the use of UV light to achieve the photoactivation. This results in the underutilization of the material in sunlight-driven photocatalysis schemes. In order to overcome this handicap, the synthesis of heterostructures using low band gap semiconductors coupled with TiO 2 has brought exceptional materials for visible light-driven photocatalysis. In this chapter, the fundamentals of the synthesis and photoactivation of TiO 2-low band gap semiconductor heterostructures are explored. The mechanisms leading to the increase of the photocatalytic activity of such heterostructures are described. A summary of the available data on the photocatalytic performance of TiO 2-based heterostructures is presented, in terms of degradation of organic pollutants in water using visible light and sunlight. A comparison of the depuration performance of powdered and thin film heterostructures is given at the end of the chapter.

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“…Additionally, these problems have featured hugely in scientific publications and warnings (Tolba and Saab 2009). Such problems that have been hugely addressed in the literature include, as an examples, air pollution (Ahmadi et al 2015;Li et al 2016a), climatic changes (Carleton and Hsiang 2016; Deutsch et al 2015), industrial effluents (Padmanaban et al 2016), desertification (Juřička et al 2016;Li et al 2016b), vulnerability of groundwater to external pollutants (Damak et al 2016;Iqbal et al 2014), land degradation (Akhtar-Schuster et al 2016;Kosmas et al 2016) and aquatic environment pollution with organic and inorganic pollutants (Shakeri et al 2015).…”

Section: Introductionmentioning

confidence: 99%