Kinetic study of p-nitrophenol photodegradation with modified TiO2 xerogels

Tasseroul, Ludivine; Pirard, Sophie; Lambert, Stéphanie D.; Páez, Carlos A.; Poelman, Dirk; Pirard, Jean-Paul; Heinrichs, Benoı̂t

doi:10.1016/j.cej.2012.02.050

Cited by 36 publications

(19 citation statements)

References 41 publications

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“…Certainly, the generated intermediate products can be further degraded, leading to benzene ring cleavage and formation of oxygenated aliphatic compounds. The ultimate products include carbon dioxide, water, nitrate after complete mineralisation of the 4‐nitrophenol …”

Section: Resultsmentioning

confidence: 99%

Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO₂

Liu

Zhao

Lai

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND: Photocatalytic degradation of organic compounds, including nitrophenol, is one of the most popular approaches to pollution control and disposal. Graphene-based nanocomposites have attracted considerable attention in photocatalytic research owing to their excellent electrical, thermal and mechanical properties. In this work, TiO 2 material was modified with graphene by a hydrothermal method, the photocatalytic performance of the prepared catalyst was evaluated by degradation of 4-nitrophenol, which is a highly toxic, stable and carcinogenic organic pollutant. RESULTS:The characterization results showed that the low amount of graphene disperses well over TiO 2 and it does not influence the crystal phase, but makes the specific surface area of graphene/TiO 2 greater than that of TiO 2 . Compared with TiO 2 , graphene/TiO 2 exhibits enhanced photocatalytic activity for the degradation of 4-nitrophenol under simulated solar irradiation. CONCLUSION:The enhanced activity of photo-degradation could be attributed to the involved graphene being beneficial to charge transportation and separation of photogenerated charge carriers, and providing more surface active sites for degradation reaction of the target pollutant. The present result highlights the important application of graphene as a novel carbon material in treating highly toxic pollutant through photocatalysis technology.

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Section: Resultsmentioning

confidence: 99%

Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO₂

Liu

Zhao

Lai

et al. 2017

J of Chemical Tech & Biotech

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“…The kinetics of the photocatalytic degradation of aqueous pollutants by NTO is still a subject of debate [57][58][59]. Several recent reports claim that it follows the Langmuir-Hinshelwood model (L-H model) of kinetics [21,22,25,26].…”

Section: Methodsmentioning

confidence: 99%

Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates

Varghese²,

2012

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Photocatalytic water treatment using nanocrystalline titanium dioxide (NTO) is a well-known advanced oxidation process (AOP) for environmental remediation. With the in situ generation of electron-hole pairs upon irradiation with light, NTO can mineralize a wide range of organic compounds into harmless end products such as carbon dioxide, water, and inorganic ions. Photocatalytic degradation kinetics of pollutants by NTO is a topic of debate and the mostly reporting Langmuir-Hinshelwood kinetics must accompanied with proper experimental evidences. Different NTO morphologies or surface treatments on NTO can increase the photocatalytic efficiency in degradation reactions. Wisely designed photocatalytic reactors can decrease energy consumption or can avoid post-separation stages in photocatalytic water treatment processes. Doping NTO with metals or non-metals can reduce the band gap of the doped catalyst, enabling light absorption in the visible region. Coupling NTO photocatalysis with other water-treatment technologies can be more beneficial, especially in large-scale treatments. This review describes recent developments in the field of photocatalytic water treatment using NTO.

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“…p-Nitrophenol (PNP) has been listed as a priority pollutant by the U.S. EPA due to its toxicity to organisms. Many efforts have been devoted to removal of the PNP, whereas the addition of chemicals brings extra pollution [27][28][29][30][31]. Besides, the cost of techniques such as HRP encapsulated into poly (d,l-lactide-co-glycolide) (PLGA) / PEO-PPO-PEO (F108) electrospun fibrous membranes (EFMs) by emulsion electrospinning [26], ultrasonic degradation of PNP in the presence of additives [27], heterogeneous fenton-like reactions on nano-magnetite (Fe 3 O 4 ) were used for the degradation of PNP) [28] are high in all cases.…”

Section: Catalytic Oxidation Of P-nitrophenolmentioning

confidence: 99%

Synthesis of Chitosan-Functionalized Fibrous Membrane for Immobilization of Horseradish Peroxidase: Interfacial Property and Application for Catalytic Oxidation of P-Nitrophenol

Wang

Liu

2018

Journal of Engineered Fibers and Fabrics

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A hydrophilic fibrous membrane consisting of a network of a non-crystalline hydrophobic polymer and an in situ crosslinked hydrophilic chitosan polymer is studied. This chitosan-functionalized membrane can be employed as a support for immobilization of horseradish peroxidases (HRPs). The immobilized HRPs (mass loading ~110 mg /g) show high stabilities over a wide pH range of 4~10 and temperature range of 25~60 o C. In addition, the immobilized HRPs can function as a recyclable biocatalyst for catalytic oxidation of p-nitrophenol (PNP). After 10 cycles, the PNP removal efficiency is 70 percent. The results demonstrate that the chitosan-functionalized fibrous membrane is a promising support for immobilization of enzymes and has applications related to enzyme catalysis.

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Kinetic study of p-nitrophenol photodegradation with modified TiO2 xerogels

Cited by 36 publications

References 41 publications

Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO₂

Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO₂

Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates

Synthesis of Chitosan-Functionalized Fibrous Membrane for Immobilization of Horseradish Peroxidase: Interfacial Property and Application for Catalytic Oxidation of P-Nitrophenol

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Kinetic study of p-nitrophenol photodegradation with modified TiO2 xerogels

Cited by 36 publications

References 41 publications

Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO2

Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO2

Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates

Synthesis of Chitosan-Functionalized Fibrous Membrane for Immobilization of Horseradish Peroxidase: Interfacial Property and Application for Catalytic Oxidation of P-Nitrophenol

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Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO₂

Efficient photocatalytic degradation of 4‐nitrophenol over graphene modified TiO₂