Production of electricity and hydrogen by photocatalytic degradation of organic wastes in a photoelectrochemical cell

Lianos, Panagiotis

doi:10.1016/j.jhazmat.2010.10.083

Cited by 355 publications

(220 citation statements)

References 224 publications

(475 reference statements)

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“…The metal reduction process involves the migration of electrons, therefore, it may also be possible to generate electricity during the recovery of metals from the wastewater [18,19]. Within this contest, the recovery of heavy metals from wastewater by photoelectrocatalysis has the potential to simultaneously address three issues, including (1) pollution prevention of heavy metals, (2) metal resources conservation and (3) renewable energy generation.…”

Section: Introductionmentioning

confidence: 99%

“…The performance and underlying mechanism of this innovating cell for environmental remediation with simultaneous generation of renewable energy are presented in this study. Previous studies in literature utilizing PEC have focused primarily on the removal or organic contaminants [18] and this is one of the few focusing on the removal and recovery of heavy metals from wastewater with simultaneous production of electricity. …”

Section: Introductionmentioning

confidence: 99%

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Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater

Wang

Puma

et al. 2017

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater

Wang

Puma

et al. 2017

Journal of Hazardous Materials

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“…This form of biasing proves un-cost effective as a constant replenishing of the starting electrolytes is required as each move towards equilibrium as H + and OH -are consumed. For photovoltaic bias (d), a solar photovoltaic cell is directly connected to the PEC, this could be a dye sensitised cell for example (Andrade et al 2010;Shin et al 2013;Lianos et al 2011).…”

Section: Cell Biasingmentioning

confidence: 99%

Photocatalytic Splitting of Water

Skillen

McCullagh

Adams

2014

Environmental Photochemistry Part III

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The final publication is available at Springer via http://dx.doi.org/10.1007/698_2014_261 AbstractThe use of photocatalysis for the photosplitting of water to generate hydrogen and oxygen has gained interest as a method for the conversion and storage of solar energy. The application of photocatalysis through catalyst engineering, mechanistic studies and photoreactor development has highlighted the potential of this technology, with the number of publications significantly increasing in the past few decades. In 1972 Fujishima and Honda described a photoelectrochemcial system capable of generating H 2 and O 2 using thin film TiO 2 . Since this publication, a diverse range of catalysts and platforms have been deployed, along with a varying range of photoreactors coupled with photoelectrochemical and photovoltaic technology. This chapter aims to provide a comprehensive overview of photocatalytic technology applied to overall H 2 O splitting. An insight into the electronic and geometric structure of catalysts is given based upon the one and two step photocatalyst systems.One step photocatalysts are discussed based upon their d 0 and d 10 electron configuration and core metal ion including transition metal oxides, typical metal oxides and metal nitrides. The two step approach, referred to as the Z-scheme, is discussed as an alternative approach to the traditional one step mechanism and the potential of the system utilise visible and solar irradiation. In addition to this the mechanistic procedure of H 2 O splitting is reviewed to provide the reader with a detailed understanding of the process. Finally, the development of photoreactors and reactor properties are discussed with a view towards the photoelectrochemical splitting of H 2 O.

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“…The electrons produced from the photoanode leave the holes and transfer through the external circuit to the photocathode, and the holes at the photoanode are released for degradation of organic compounds [7]. In addition, the PFC system, in which an n-type semiconductor generally used as photoanode with a Fermi level higher than that of the cathode, could develop interior bias which facilitates the transfer of electrons from photoanode to photocathode thereby producing a concurrent generation of electricity [8]. The existing PFC systems constituting TiO 2 and Pt as photoelectrodes [3,8] have severe limitations because TiO 2 responds most to ultraviolet (UV) region light and suffers from the high probability of electron/hole pair recombination [9].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the PFC system, in which an n-type semiconductor generally used as photoanode with a Fermi level higher than that of the cathode, could develop interior bias which facilitates the transfer of electrons from photoanode to photocathode thereby producing a concurrent generation of electricity [8]. The existing PFC systems constituting TiO 2 and Pt as photoelectrodes [3,8] have severe limitations because TiO 2 responds most to ultraviolet (UV) region light and suffers from the high probability of electron/hole pair recombination [9]. Using Pt as photocathode is obviously not a viable approach, which would eventually restrict its application to a large-scale level [10].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Visible Light Responsive Heterojunction Composites as Dual Photoelectrodes for Photocatalytic Fuel Cell

et al. 2018

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Abstract:In the present work, a novel photocatalytic fuel cell (PFC) system involving a dual heterojunction photoelectrodes, viz. polyaniline/TiO 2 nanotubes (PANI/TiO 2 NTs) photoanode and CuO/Co 3 O 4 nanorods (CuO/Co 3 O 4 NRs) photocathode, has been designed. Compared to TiO 2 NTs electrode of PFC, the present heterojunction design not only enhances the visible light absorption but also offers the higher efficiency in degrading Rhodamine B-a model organic pollutant. The study includes an evaluation of the dual performance of the photoelectrodes as well. Under visible-light irradiation of 3 mW cm −2 , the cell composed of the photoanode PANI/TiO 2 NTs and CuO/Co 3 O 4 NRs photocathode forms an interior bias of +0.24 V within the PFC system. This interior bias facilitated the transfer of electrons from the photoanode to photocathode across the external circuit and combined with the holes generated therein along with a simultaneous power production. In this manner, the separation of electron/hole pair was achieved in the photoelectrodes by releasing the holes and electrons of PANI/TiO 2 NTs photoanode and CuO/Co 3 O 4 NRs photocathode, respectively. Using this PFC system, the degradation of Rhodamine B in aqueous media was achieved to an extent of 68.5% within a reaction duration of a four-hour period besides a simultaneous power generation of 85 µA cm −2 .

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Production of electricity and hydrogen by photocatalytic degradation of organic wastes in a photoelectrochemical cell

Cited by 355 publications

References 224 publications

Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater

Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater

Photocatalytic Splitting of Water

Highly Efficient and Visible Light Responsive Heterojunction Composites as Dual Photoelectrodes for Photocatalytic Fuel Cell

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