Preparation and characterization of TiO 2 -based nanosheets for photocatalytic degradation of acetylsalicylic acid: Influence of calcination temperature

Liu, Dong; Cheng, Xiuwen; Yu, Xin; Xing, Zipeng

doi:10.1016/j.cej.2015.05.102

Cited by 71 publications

(29 citation statements)

References 65 publications

(70 reference statements)

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“…The heterogeneous reaction mechanisms proposed are similar to their homogeneous counterparts [10][11][12][13]. These mechanisms can be summarized as: (i) direct charge transfer from the semiconductor to the dissolved molecule; (ii) generation of radicals from water decomposition, which then attack the organic molecules.…”

Section: Introductionmentioning

confidence: 96%

“…While a part of the salicylic acid also got oxidized to 2,3-dihydroxybenzoic acid, it was less prominent than the 1,2-dihydroxybenzene formation reaction [13]. Hydroquinone hydroxylated to benzoquinone, which, being unstable in aqueous solution, underwent ring-opening followed by further oxidation to muconic acid [13]. The addition of a hydroxyl radical to the double bond of muconic acid yielded maleic acid and oxalic acid.…”

Section: Mechanism Of Photodegradation Of Asamentioning

confidence: 99%

“…Salicylic acid got oxidized to 1,2-dihydroxybenzene, which further oxidized to form hydroquinone. While a part of the salicylic acid also got oxidized to 2,3-dihydroxybenzoic acid, it was less prominent than the 1,2-dihydroxybenzene formation reaction [13]. Hydroquinone hydroxylated to benzoquinone, which, being unstable in aqueous solution, underwent ring-opening followed by further oxidation to muconic acid [13].…”

Section: Mechanism Of Photodegradation Of Asamentioning

confidence: 99%

“…A number of analytical techniques such as high performance liquid chromatography (HPLC), FTIR were employed for determination of several organic intermediates for degradation of several dyes [2,13]. Aspirin molecules are non-volatile and highly soluble in hot water and cannot be analyzed by Gas Chromatography/Mass Spectroscopy GC/MS.…”

Section: High Performance Liquid Chromatographymentioning

confidence: 99%

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Mechanism of Acetyl Salicylic Acid (Aspirin) Degradation under Solar Light in Presence of a TiO2-Polymeric Film Photocatalyst

2016

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Application of titanium dioxide (TiO 2 ) as a photocatalyst has presented a promising avenue for the safe photocatalytic degradation of pollutants. Increasing levels of the release of pharmaceuticals in the environment and formation of the intermediates during their degradation may impose health and environmental risks and therefore require more attention. Photocatalytic degradation of acetylsalicylic acid (aspirin) was carried out in the presence of the TiO 2 -filled polymeric film as a photocatalyst under solar light irradiation. The polymeric film incorporates TiO 2 in the matrix, which acts as a photocatalyst under solar illumination and degrades the acetyl salicylic acid (ASA) into a range of organic compounds before complete demineralization (formation of carbon dioxide and water as final products). Among the intermediates, acetic acid was found to be present in a larger amount compared to other organic acids. The qualitative/quantitative analyses of the intermediates resulted in the determination of the most probable reaction's mechanism in the degradation process. The mechanism of degradation of acetylsalicylic acid and its reaction pathway were developed from liquid chromatography/mass spectroscopy (LC/MS), Fourier Transform Infra Red (FTIR) and UV spectrophotometric analysis. It was found that hydroxyl groups were dominant in the degradation process compared to electrons and holes generated by TiO 2 . The total organic carbon (TOC) analysis was also carried out to analyze the organic carbon content of the intermediates formed during the course of degradation.

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Section: Introductionmentioning

confidence: 96%

Section: Mechanism Of Photodegradation Of Asamentioning

confidence: 99%

Section: Mechanism Of Photodegradation Of Asamentioning

confidence: 99%

Section: High Performance Liquid Chromatographymentioning

confidence: 99%

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Mechanism of Acetyl Salicylic Acid (Aspirin) Degradation under Solar Light in Presence of a TiO2-Polymeric Film Photocatalyst

2016

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“…Some researchers have stated that the better the crystal structure the photocatalyst material produces, the better the photocatalytic activity will be [11][12]. This is due to the increasing charge carrier mobility of the photocatalyst [13].…”

Section: Introductionmentioning

confidence: 99%

Different heat treatment of CeO₂nanoparticle composited with ZnO to enhance photocatalytic performance

Taufik

Shabrany

Saleh

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this study, ZnO/CeO2 nanocomposites were prepared with four variations of the molar ratio of ZnO to CeO2 nanoparticles. Both ZnO and CeO2 nanoparticles were synthesized using the sol-gel method at low temperature, followed by different heat treatments for CeO2 nanoparticles. Thermal phase transformation studies of the CeO2 nanoparticles were observed at annealing temperatures of 400-800°C. The complete crystalline structure of CeO2 nanoparticles was obtained at an annealing temperature of 800°C. The structural and optical properties of all samples were observed using several characterization techniques, such as X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy, and Brunauer, Emmett, and Teller (BET) surface area analysis. The structural characterization results revealed that the prepared CeO2 nanoparticles were quite crystalline, with a cubic structure. The photocatalytic activities of all samples were tested under visible irradiation. The obtained results showed that ZnO/CeO2 nanocomposites with a molar ratio 1:0.3 exhibited the highest photocatalytic activity. Further understanding of the role of primary active species underlying the reaction mechanism involved in photocatalytic activity were carried out in controlled experiments by adding several scavengers. The detailed mechanism and its correlation with the properties of ZnO/CeO2 nanocomposites were discuss.

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The synergistic role of pH and calcination temperature in sol–gel titanium dioxide powders

et al. 2019

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Preparation and characterization of TiO 2 -based nanosheets for photocatalytic degradation of acetylsalicylic acid: Influence of calcination temperature

Cited by 71 publications

References 65 publications

Mechanism of Acetyl Salicylic Acid (Aspirin) Degradation under Solar Light in Presence of a TiO2-Polymeric Film Photocatalyst

Mechanism of Acetyl Salicylic Acid (Aspirin) Degradation under Solar Light in Presence of a TiO2-Polymeric Film Photocatalyst

Different heat treatment of CeO₂nanoparticle composited with ZnO to enhance photocatalytic performance

The synergistic role of pH and calcination temperature in sol–gel titanium dioxide powders

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Preparation and characterization of TiO 2 -based nanosheets for photocatalytic degradation of acetylsalicylic acid: Influence of calcination temperature

Cited by 71 publications

References 65 publications

Mechanism of Acetyl Salicylic Acid (Aspirin) Degradation under Solar Light in Presence of a TiO2-Polymeric Film Photocatalyst

Mechanism of Acetyl Salicylic Acid (Aspirin) Degradation under Solar Light in Presence of a TiO2-Polymeric Film Photocatalyst

Different heat treatment of CeO2nanoparticle composited with ZnO to enhance photocatalytic performance

The synergistic role of pH and calcination temperature in sol–gel titanium dioxide powders

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Different heat treatment of CeO₂nanoparticle composited with ZnO to enhance photocatalytic performance