Visible-Light-Driven Photocatalytic Fuel Cell with an Ag-TiO2 Carbon Foam Anode for Simultaneous 4-Chlorophenol Degradation and Energy Recovery

Fu, Shoupeng; Deng, Beiqi; Ma, Ding; Cheng, Hanqing

doi:10.3390/chemengineering2020020

Cited by 5 publications

(3 citation statements)

References 38 publications

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“…In the case of the activated LDHM2F catalyst, the intensity of the signal is low, which implies that there is little presence of OH • radicals associated with the scarce formation of these in 60 min of reaction. On the other hand, in the case of the reference catalyst TiO2-P25, an intense band associated with the production of hydroxycoumarin can be observed, due to the ability of the reference catalyst to produce hydroxyl radicals [42,43]. The above suggests that the activated LDHM2F catalyst does not favor the formation of OH • radicals.…”

Section: Detection Of Hydroxyl Radicals (Oh • )mentioning

confidence: 92%

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

et al. 2019

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In recent years, the search for solutions for the treatment of water pollution by toxic compounds such as phenols and chlorophenols has been increasing. Phenols and their derivatives are widely used in the manufacture of pesticides, insecticides, paper, and wood preservers, among other things. Chlorophenols are partially biodegradable but not directly photodegradable by sunlight and are extremely toxic—especially 2,4,6-trichlorophenol, which is considered to be potentially carcinogenic. As a viable proposal to be applied in the treatment of water contaminated with 2,4,6-trichlorophenol, this paper presents an application study of the thermally activated Mg/Fe layered double hydroxides as photocatalysts for the mineralization of this contaminant. Activated Mg/Fe layered double hydroxides were characterized by X-ray diffraction, thermal analysis, N2 physisorption, and scanning electron microscopy with X-ray dispersive energy. The results of the photocatalytic degradation of 2,4,6-trichlorophenol in aqueous solution showed good photocatalytic activity, with an efficiency of degradation of up to 93% and mineralization of 82%; degradation values which are higher than that of TiO2-P25, which only reached 18% degradation. The degradation capacity is attributed to the structure of the MgO–MgFe2O4 oxides derived from double laminate hydroxide Mg/Fe. A path of degradation based on a mechanism of superoxide and hollow radicals is proposed.

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Section: Detection Of Hydroxyl Radicals (Oh • )mentioning

confidence: 92%

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

et al. 2019

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“…The substantially higher current efficiency and the much lower EC in the developed PEC process showed a remarkable catalytic performance of this strategy applied for efficient water remediation. Second, the catalytic performance of this wireless PEC strategy was compared with the reported conventional PEC method for the degradation of 4-CP. ,,− For comparison, the concentration of 4-CP in our system was changed from 50 to 10 mg L –1 . 4-CP could be completely degraded within 60 min, which was faster than that of other conventional PEC by using various photoanodes.…”

Section: Resultsmentioning

confidence: 99%

Wireless Photoelectrochemical Strategy Driven by Nanobipolar Electrodes for Water Remediation

et al. 2023

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The separation of photogenerated charges is vital for photocatalysis. Here, we report a wireless photoelectrochemical strategy for efficient charge separation on an optoelectronic synergy-driven nanoparticulate semiconductor. Using g-C 3 N 4 /Fe−TiO 2 as model semiconductor nanoparticles, an advanced oxidation process (AOP) for water remediation was established with the activity and O 2•− photogeneration quantum efficiency being significantly improved (i.e., 9.7 times compared to conventional photoelectrocatalysis and 5.9 times that of photocatalysis, respectively). More importantly, this strategy has a wide range of applications for the removal of different refractory organic pollutants with a strong tolerance for a supporting electrolyte. The extraordinary catalytic performance was attributed to a synergistic effect between photochemistry and electrochemistry on the particle surface, where numerous nanobipolar electrodes were generated under an electric field to trigger the reduction of electrogenerated O 2 to form reactive oxygen species. This work provides a promising AOP strategy of a photoelectrochemical-driven nanoparticulate semiconductor for challenging water remediation.

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“…To decrease this bandgap, a hybrid nano-structure of TiO 2 and Ag [144], or addition of another semiconductor like graphitic carbon nitride (g-C 3 N 4 ) [145] or tungsten trioxide (WO 3 ) [146], could be used. Instead of using commercial rutile, the use of narrow bandgap TiO 2 can also enhance its action and energy recovery, owing to the reduced electron transfer resistance [147,140].…”

Section: Mfc-pec Hybrid Systemsmentioning

confidence: 99%

Wastewater treatment and energy production by microbial fuel cells

Siddiqui

Bhatnagar

Dhingra

et al. 2021

Biomass Conv. Bioref.

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The increasing demands of efficient and sustainable energy generation methods from waste products have taken a giant leap in the last century, and especially in the previous two decades. Wastewater treatment has also been a much-researched topic in recent years owing to the exponential increase in effluent-laden wastewater from industries, the agricultural sector and food sector, and its effects on the environment. There have been plenty of wastewater treatment techniques over the years, but most of them lack in terms of cost-effectiveness, durability, and energy recovery rates. Microbial fuel cells can prove to be of great use to tackle both of these issues in one go, as they perform bioelectrochemical processes on organic biodegradable compounds to oxidize them to generate power which can be harnessed by various means. This article explains the aim, construction, mechanism, and application of microbial fuel cells; the economic and scientific challenges that they face in the future; and microbial fuel cell (MFC) hybrid systems which make use of MFCs combined with other useful technologies for greater aims and better efficiencies. It overall discusses the various ways in which MFCs outperform other wastewater treatment technologies by significantly decreasing sludge production and being environment-friendly, and also some limitations and drawbacks that MFCs face owing to the fact that they are relatively newer technologies and still require decades of modifications until they reach excellent output rates. MFCs are known not only for wastewater treatment but also for contaminant removal, heavy metal removal, biohydrogen production, applications in biosensors, etc., as also discussed in this article.

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Visible-Light-Driven Photocatalytic Fuel Cell with an Ag-TiO2 Carbon Foam Anode for Simultaneous 4-Chlorophenol Degradation and Energy Recovery

Cited by 5 publications

References 38 publications

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

Wireless Photoelectrochemical Strategy Driven by Nanobipolar Electrodes for Water Remediation

Wastewater treatment and energy production by microbial fuel cells

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