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

Wang, Dawei; Li, Yang; Puma, Gianluca Li; Lianos, Panagiotis; Wang, Chao; Wang, Peifang

doi:10.1016/j.jhazmat.2016.10.037

Cited by 78 publications

(25 citation statements)

References 36 publications

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“…metal removal/recovery [99][100][101][102]; and, simultaneous generation of electricity and hydrogen [12,[103][104][105].…”

Section: Semiconductor Materials Applied In Photoelectrocatalytic Wasmentioning

confidence: 99%

“…The semiconductor materials that are applied in photoelectrocatalytic treatment of wastewater include photoanodes (n-type) and photocathodes (p-type) if oxidation or reduction is the main process at the interface [84]. Thus, photoelectrocatalysis is developed in such wastewater treatment field as: organic compounds oxidation [92,93]; inorganic ions reduction [94,95]; disinfection [96][97][98]; metal removal/recovery [99][100][101][102]; and, simultaneous generation of electricity and hydrogen [12,[103][104][105].…”

Section: Single Semiconductor Photoelectrode Materialsmentioning

confidence: 99%

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Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Kuśmierek

2020

Catalysts

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Industrial sources of environmental pollution generate huge amounts of industrial wastewater containing various recalcitrant organic and inorganic pollutants that are hazardous to the environment. On the other hand, industrial wastewater can be regarded as a prospective source of fresh water, energy, and valuable raw materials. Conventional sewage treatment systems are often not efficient enough for the complete degradation of pollutants and they are characterized by high energy consumption. Moreover, the chemical energy that is stored in the wastewater is wasted. A solution to these problems is an application of photoelectrocatalytic treatment methods, especially when they are coupled with energy generation. The paper presents a general overview of the semiconductor materials applied as photoelectrodes in the treatment of various pollutants. The fundamentals of photoelectrocatalytic reactions and the mechanism of pollutants treatment as well as parameters affecting the treatment process are presented. Examples of different semiconductor photoelectrodes that are applied in treatment processes are described in order to present the strengths and weaknesses of the photoelectrocatalytic treatment of industrial wastewater. This overview is an addition to the existing knowledge with a particular focus on the main experimental conditions employed in the photoelectrocatalytic degradation of various pollutants with the application of semiconductor photoelectrodes.

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“…metal removal/recovery [99][100][101][102]; and, simultaneous generation of electricity and hydrogen [12,[103][104][105].…”

Section: Semiconductor Materials Applied In Photoelectrocatalytic Wasmentioning

confidence: 99%

Section: Single Semiconductor Photoelectrode Materialsmentioning

confidence: 99%

Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Kuśmierek

2020

Catalysts

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“…The photogenerated electrons are injected, as already said, into the host conduction band of titania, which lies at an energy level approximately equal to E 0 = −1.0 V, in an alkaline environment, as it is the case with the S 2− /SO 3 2− electrolyte in the anode compartment. The pH of the Na 2 SO 4 electrolyte in the cathode compartment is around 6; therefore, the corresponding potential of Equation (5) in such an electrolyte is around E 0 = +0.33 V. The difference between these potentials is approximately equal to 1.33 V; therefore, there is sufficient bias to drive electrons from the photoanode to the counter electrode and carry out oxygen reduction. Consequently, the cell is expected to run by itself as a solar cell without any external bias.…”

Section: Resultsmentioning

confidence: 99%

“…PFC is a fuel cell which is based on the photocatalytic oxidation of a sacrificial agent at the photoanode and the reduction of dioxygen at the cathode electrode. PFC then is a photoelectrochemical cell which consists of two electrodes; one anode and one cathode, in contact with an electrolyte [1][2][3][4][5][6][7][8][9][10][11]. The (photo)anode carries a semiconductor photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Use of Chalcogenide-Semiconductor-Sensitized Titania to Directly Charge a Vanadium Redox Battery

2020

Self Cite

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Unmediated charging of a battery using solar radiation is a very attractive project of solar energy conversion and storage. In the present work, solar energy was converted into electricity using a photocatalytic fuel cell operating with a chalcogenide-semiconductor-sensitized nanoparticulate titania photoanode and an air-cathode functioning by oxygen reduction. This cell produced sufficient energy to directly charge a vanadium redox battery functioning with a VOSO4 electrolyte and carbon paper electrodes. The whole system is characterized by ease of construction and simplicity of conception; therefore, it satisfies conditions for practical applications.

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“…The environmental sustainability challenge is also growing at a large scale and complexity, resulting in severe environmental impacts including water pollutions. Within this context, the rise of industrialization alongside with the rapid growth of the global population has been intimately linked with a higher generation of wastewater [1][2][3]. The statistical glance from United Nations World Water Assessment Programme (2003) has reported that around 2 million tons of industrial sewage and agricultural waste have been discharged into the water bodies every day.…”

Section: Introductionmentioning

confidence: 99%

Recent Development of Graphitic Carbon Nitride-Based Photocatalyst for Environmental Pollution Remediation

Samsudin¹,

Bacho²,

Sufian³

2019

Nanocatalysts

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Globalization today has helped fuel the global socioeconomic growth of the world and reshaping the growth of the industries. While the development had been remarkable, the rapid rise of industrialization had provoked the sustainable chain of diversity which is reflected by rising pollution level, particularly on the water pollution. On account of the cutting edge of water security issue, engineering photocatalytic material remains crucial in finding new ways to combat the challenge of water pollution through photocatalytic pollutants degradation while at the same time acts as the frontlines for energy conversion and environmental protection. To date, graphitic carbon nitride, g-C 3 N 4 had emerged as a promising material of interest in photocatalytic application due to its appealing characteristics such as excellent optical properties and high physiochemical and thermal stability. This chapter will comprehensively discuss an insight into the most recent progress in synthesis, properties and the photocatalytic application of g-C 3 N 4 , particularly in environmental pollution remediation. Special emphasis is also placed on the most recent strategies for enhancing the photocatalytic performance of the g-C 3 N 4 photocatalyst. Finally, the future directions and perspectives will be presented.

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

Abstract: Additional Information:• This paper was accepted for publication in the journal Journal of Haz-

Cited by 78 publications

References 36 publications

Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Use of Chalcogenide-Semiconductor-Sensitized Titania to Directly Charge a Vanadium Redox Battery

Recent Development of Graphitic Carbon Nitride-Based Photocatalyst for Environmental Pollution Remediation

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