Pd–Fe/TiO2 catalysts for phenol degradation with in situ generated H2O2

Photoelectrocatalysis is a rapidly developing technology for degrading recalcitrant organic compounds in wastewater due to its ability to overcome electron-hole recombination. Herein, we synthesized Fe/S co-doped TiO2 nanotubes through an in-situ anodization technique. We developed a simple reduced quadratic model based on response surface modeling which can be used to adequately correlate the operating parameters with the photoelectrocatalytic performance of Fe/S-TiNTs in degrading phenol red. Predicted maximum dye degradation of 54.78% was achieved by the generated model using the optimized parameters: initial phenol red concentration = 5.22 mg L-1, applied voltage = 27.4 V, and dopant loading = 2.97 wt.%. Upon validation, experimental maximum phenol degradation of 53.24% was obtained, which agrees well with the predicted value within statistical significance. Overall, our model can be potentially used for process optimization within the design space studied.

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“In situ” investigations to define the degradation of phenols in groundwater

Water Science & Technology Water Supply ◽

10.2166/ws.2007.061 ◽

2007 ◽

Vol 7 (3) ◽

pp. 9-16

Author(s):

M. Dimkić ◽

M. Pušić ◽

M. Jordanovski

Keyword(s):

Analytical Methods ◽

Phenol Degradation ◽

Aerobic Conditions ◽

Aquifer Material ◽

Short Overview ◽

Sandy Aquifers ◽

Kinetics Of

Phenols are especially suitable for defining the mechanism of their degradation in groundwater. Phenols, for the most part, do not sorb on clastic aquifer material. This allows for a comparison of their relative concentrations in groundwater to the concentrations of a tracer, and leads to conclusions which can be drawn about the kinetics of phenol degradation. We have had an opportunity to monitor, in detail, the degradation of phenols at three locations. All three cases involved gravelly and sandy aquifers and aerobic conditions. A summary of the analytical methods applied, and basic results obtained is presented. This paper represents a short overview of the flow and results of the monitoring and five tests which were conducted at the three locations over several years. We believe that the results are representative of the behavior of phenols in aerobic intergranular aquifers.

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In situ fabrication of Bi2MoO6/Bi2MoO6-x homojunction photocatalyst for simultaneous photocatalytic phenol degradation and Cr(VI) reduction

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2021.04.122 ◽

2021 ◽

Author(s):

Huidong Shen ◽

Feng Fu ◽

Wenwen Xue ◽

Xiaoxia Yang ◽

Saira Ajmal ◽

...

Keyword(s):

Phenol Degradation ◽

In Situ Fabrication

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Efficient H2O2 generation and spontaneous OH conversion for in-situ phenol degradation on nitrogen-doped graphene: Pyrolysis temperature regulation and catalyst regeneration mechanism

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2020.122681 ◽

2020 ◽

Vol 397 ◽

pp. 122681 ◽

Cited By ~ 6

Author(s):

Pei Su ◽

Minghua Zhou ◽

Ge Song ◽

Xuedong Du ◽

Xiaoye Lu

Keyword(s):

Temperature Regulation ◽

Pyrolysis Temperature ◽

Phenol Degradation ◽

Catalyst Regeneration ◽

Nitrogen Doped ◽

H2o2 Generation ◽

Regeneration Mechanism ◽

Nitrogen Doped Graphene ◽

Doped Graphene

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How Photocatalyst Dosage and Ultrasound Application Influence the Photocatalytic Degradation Rate of Phenol in Water: Elucidating the Mechanisms Behind

Water ◽

10.3390/w12061672 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1672 ◽

Cited By ~ 1

Author(s):

Wim Van de Moortel ◽

Mohammadreza Kamali ◽

Kristel Sniegowski ◽

Leen Braeken ◽

Jan Degrève ◽

...

Keyword(s):

Photocatalytic Degradation ◽

Degradation Rate ◽

Uv Light ◽

Degradation Kinetics ◽

Phenol Degradation ◽

Process Conditions ◽

Oh Radicals ◽

Tio2 Particles ◽

Ultrasound Application

Photocatalysis is of high interest for the treatment of wastewater containing non-biodegradable organic components. In this work, the photocatalytic degradation of phenol by TiO2 photocatalysis was assessed, the influence of ultrasound (US) treatment was evaluated, and the mechanisms behind it were elucidated. It was shown that the TiO2 concentration (in suspension) has a large influence on the degradation kinetics. At high TiO2 concentrations, a reduced efficiency was observed due to the shielding of the UV light by TiO2 particles. US treatment effectively increased phenol degradation by improving the mass transfer while it was shown by the experimental data that particle deagglomeration did not play a significant role. The degradation mainly occurred through indirect phenol oxidation by hydroxyl (OH*) radicals, which were formed in situ at the surface of the photocatalyst. Finally, based on the partial least squares (PLS) methodology, a mathematical model was developed, representing phenol degradation as a function of the selected process conditions.

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