An integrated catalyst of Pd supported on magnetic Fe3O4 nanoparticles: Simultaneous production of H2O2 and Fe2+ for efficient electro-Fenton degradation of organic contaminants

Luo, Mingsen; Yuan, Songhu; Tong, Man; Liao, Peng; Xie, Wenjing; Xu, Xiaofeng

doi:10.1016/j.watres.2013.09.029

Cited by 130 publications

(47 citation statements)

References 35 publications

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“…A notable improvement of decolorization efficiency was realized with applied voltage increasing from 300 mV to 500 mV. The increased production of oxidant such as hydrogen peroxide at higher applied voltage might be responsible for this improvement as indicated by other studies [11,43]. As electrolysis was performed under the relatively low voltage without water decomposition in present study, further increase of applied voltage did not result in the more generation of above active substance, thus only a slight enhancement was obtained when the applied voltage further increased from 700 mV to 900 mV and the following experiments were conducted at 700 mV unless otherwise stated.…”

Section: Studies Of Operating Factorsmentioning

confidence: 59%

Utilization of single-chamber microbial fuel cells as renewable power sources for electrochemical degradation of nitrogen-containing organic compounds

Wang

Zhang

Borthwick

et al. 2015

Chemical Engineering Journal

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h i g h l i g h t sSingle-chamber microbial fuel cells (MFCs) are acted as renewable power sources. Enhanced degradation of nitrogen-containing organic compounds is realized. Higher applied voltage, lower initial concentration and pH improve the performance. Indirect electrochemical oxidation with generated H 2 O 2 is the main effect. a b s t r a c tBy employing promising single-chamber microbial fuel cells (MFCs) as renewable power sources, an aerated electrochemical system is proposed and for nitrogen-containing organic compounds (pyridine and methyl orange) removals. Carbon felt performed the best as electrode material while lower initial contaminant concentration and lower initial pH value could improve the performance. A degradation efficiency of 82.9% for pyridine was achieved after 360 min electrolysis with its initial concentration of 200 mg/L, initial pH of 3.0 and applied voltage of 700 mV. Mechanisms study implied that indirect electrochemical oxidation by generated hydrogen peroxide was responsible for their degradation. This study provides an alternative utilization form of low bioelectricity from MFCs and reveals that applying it to electrochemical process is highly-efficient as well as cost-effective for degradation of nitrogen-containing organic compounds.

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Section: Studies Of Operating Factorsmentioning

confidence: 59%

Utilization of single-chamber microbial fuel cells as renewable power sources for electrochemical degradation of nitrogen-containing organic compounds

Wang

Zhang

Borthwick

et al. 2015

Chemical Engineering Journal

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“…Typically, heterogeneous Fenton-like catalysts are microsized or nanosized and contain Fe or other metal elements, where the surface metal atoms catalyze the decomposition of H 2 O 2 . Many heterogeneous catalysts have been reported to catalyze the decomposition of H 2 O 2 for water treatment [6][7][8][9][10][11][12]. Both iron-containing and iron-free catalysts have been studied, and external energy supply (e.g., sonication [13,14], electricity [2] and light irradiation [9,[15][16][17]) is adopted in many cases to enhance the performance of heterogeneous catalysis.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fe3O4/TiO2/C Nanocomposites and Their Application in Fenton-Like Catalysis for Dye Decoloration

Liu

Zhang

et al. 2016

Catalysts

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Abstract:Fe 2+ -H 2 O 2 Fenton system is widely applied in water treatment nowadays, but the acidification and sludge generation are crucial problems to be solved. Herein, we report that Fe 3 O 4 /TiO 2 /C nanocomposites (FTCNCs) were able to catalyze the decomposition of H 2 O 2 at neutral pH and can be applied in dye decoloration. FTCNCs were prepared by precipitating TiO 2 on Fe 3 O 4 cores via the hydrolysis of tetrabutyl titanate followed by the hydrothermal dehydrogenization of glucose to deposit carbon on Fe 3 O 4 /TiO 2 . The decoloration of methylene blue (MB) in the FTCNC-H 2 O 2 Fenton-like system was monitored to reflect the catalytic activity of FTCNC. The radical generation capability was analyzed by electron spin resonance. Our results indicated that FTCNC-H 2 O 2 Fenton-like system was efficient in decolorizing MB, and the radicals led to the near complete oxidation of MB. The FTCNC-H 2 O 2 Fenton-like system could be used in a wide pH range of 4-9. A greater catalyst amount, a higher H 2 O 2 concentration, and a higher temperature accelerated the decoloration kinetics. FTCNCs showed good activity after the regeneration of 8 cycles. The implication to the practical applications of FTCNCs in water treatment is discussed.

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“…However, in most heterogeneous electroFenton systems the solid iron catalysts act as self-regulators of iron supply which release Fe 2+ to the bulk to react with electrogenerated H 2 O 2 [28][29][30][31]. These systems are virtually controlled by the homogeneous catalysis mechanism, and the activities of catalysts deteriorate with repeated use because of the leaching of Fe 2+ from the catalysts to aqueous phase.…”

Section: Relationship Between the Surface Structure And Catalytic Actmentioning

confidence: 99%

In-situ fabrication of supported iron oxides from synthetic acid mine drainage: High catalytic activities and good stabilities towards electro-Fenton reaction

Sun

Zhai

2015

Applied Catalysis B: Environmental

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An integrated catalyst of Pd supported on magnetic Fe3O4 nanoparticles: Simultaneous production of H2O2 and Fe2+ for efficient electro-Fenton degradation of organic contaminants

Cited by 130 publications

References 35 publications

Utilization of single-chamber microbial fuel cells as renewable power sources for electrochemical degradation of nitrogen-containing organic compounds

Utilization of single-chamber microbial fuel cells as renewable power sources for electrochemical degradation of nitrogen-containing organic compounds

Preparation of Fe3O4/TiO2/C Nanocomposites and Their Application in Fenton-Like Catalysis for Dye Decoloration

In-situ fabrication of supported iron oxides from synthetic acid mine drainage: High catalytic activities and good stabilities towards electro-Fenton reaction

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