Photocatalytic degradation of dimethyl phthalate in aqueous TiO2 suspension: a modified Langmuir–Hinshelwood model

Du, Erdeng; Zhang, Yu Xian; Zheng, Lu

doi:10.1007/s11144-009-0014-4

Cited by 27 publications

(11 citation statements)

References 14 publications

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“…The RSM has been proved to be a powerful statistical technique for obtaining optimum conditions for advanced oxidation processes and evaluating the interactions of mutually influencing parameters with a limited number of experiments323334. Compared to the classical approach for the same number of estimated parameters, RSM cannot only evaluate the interactions effects among tested operating variables but also reduce the number of experiments to be undertaken353637. In this article, for the first time, a BWO-GO composite photocatalyst is synthesized and its photocatalytic activity is studied.…”

mentioning

confidence: 99%

Fabrication, Characterization and Response Surface Method (RSM) Optimization for Tetracycline Photodegration by Bi3.84W0.16O6.24- graphene oxide (BWO-GO)

Song

Wang

et al. 2016

Sci Rep

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RSM is a powerful tool for optimizing photocatalytic processes. The BWO-GO photocatalysts have been successfully synthesized via inorganic-salt-assisted hydrothermal method. XRD, TEM, FESEM, HRTEM and STEM are used to characterize BWO-GO heterojunction. UV-vis, PL, ESR and radical scavenger experiments are used to explore the photocatalysis mechanism. The photocatalysts are evaluated by TC photodegradation under visible light irradiation. And the main active species in TC photodegradation is ·O2−. Response surface methodology is used to optimize three key independent operating parameters, namely photocatalyst dosage (X1), percentages of GO (X2) and reaction time (X3), for TC photodegradation. The central composite design (CCD) is used to conduct experiments. The results showed that TC removal is significantly affected by the synergistic effect of linear term of X1 and X3. However, the quadratic terms of X12 and X32 had an antagonistic effect on T removal. The obtained RSM model (R2 = 0.9206) shows a satisfactory correlation between experimental and predicted values of TC removal. The optimized conditions is of 0.3 g photocatalyst dosage, 1.49 wt% GO loaded percentage and 90 min reaction time. Under this condition, theoretical prediction removal is 80.22% and the actual removal is 78.43%.

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mentioning

confidence: 99%

Fabrication, Characterization and Response Surface Method (RSM) Optimization for Tetracycline Photodegration by Bi3.84W0.16O6.24- graphene oxide (BWO-GO)

Song

Wang

et al. 2016

Sci Rep

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“…k 1 is the pseudo first-order reaction constant (min −1 ). The linearized form of L-H model is:

where r 0 is the initial photocatalytic degradation rate (determined via initial rate method [ 39 , 40 , 41 ]), k L-H is the L - H reaction constant (µg L −1 min − 1 ), K L-H is the L - H adsorption constant (L µg −1 ), and [ CBZ ] 0 is the initial CBZ concentration (µg L −1 ).…”

Section: Methodsmentioning

confidence: 99%

TiO2 (Core)/Crumpled Graphene Oxide (Shell) Nanocomposites Show Enhanced Photodegradation of Carbamazepine

Gray

2021

Nanomaterials

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The presence of pharmaceuticals and personal care products (PPCPs) in aquatic systems is a serious threat to human and ecological health. The photocatalytic degradation of PPCPs via titanium oxide (TiO2) is a well-researched potential solution, but its efficacy is limited by a variety of environmental conditions, such as the presence of natural organic macromolecules (NOM). In this study, we investigate the synthesis and performance of a novel photoreactive composite: a three-dimensional (3D) core (TiO2)-shell (crumpled graphene oxide) composite (TiGC) used as a powerful tool for PPCP removal and degradation in complex aqueous environments. TiGC exhibited a high adsorption capacity (maximum capacity 11.2 mg/g, 100 times larger than bare TiO2) and a 30% enhancement of photodegradation (compared to bare TiO2) in experiments with a persistent PPCP model, carbamazepine (CBZ). Furthermore, the TiGC performance was tested under various conditions of NOM concentration, light intensity, CBZ initial concentration, and multiple cycles of CBZ addition, in order to illustrate that TiGC performance is stable over a range of field conditions (including NOM). The enhanced and stable performance of TiCG to adsorb and degrade CBZ in water extends from its core-shell composite nanostructure: the crumpled graphene oxide shell provides an adsorptive surface that favors CBZ sorption over NOM, and optical and electronic interactions between TiO2 and graphene oxide result in higher hydroxyl radical (•OH) yields than bare TiO2.

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“…As such, a research group carried out a series of experiments on the degradation of DMP with TiO2 to clarify details of the process and establish a new kinetic model based on L-H model, (Eq. 17-19) (Du et al, 2009…”

Section: Kinetics Of Removal Of Paesmentioning

confidence: 99%

Removal of phthalates from aqueous solution by semiconductor photocatalysis: A review

Pang

Skillen

Gunaratne

et al. 2021

Journal of Hazardous Materials

104

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While phthalate esters are commonly used as plasticizers to improve the flexibility and workability of polymeric materials, their presence and detection in various environments has become a significant concern. Phthalate esters are known to have endocrine-disrupting effects, which affects reproductive health and physical development. As a result, there is now increased focus and urgency to develop effective and energy efficient technologies capable of removing these harmful compounds from the environment. This review explores the use of semiconductor photocatalysis as an efficient and promising solution towards achieving removal and degradation of phthalate esters. A comprehensive review of photocatalysts reported in the literature demonstrates the range of materials including commercial TiO2, solar activated catalysts and composite materials capable of enhancing adsorption and degradation. The degradation pathways and kinetics are also considered to provide the reader with an insight into the photocatalytic mechanism of removal. In addition, through the use of two key platforms (the technology readiness level scale and electrical energy per order), the crucial parameters associated with advancing photocatalysis for phthalate ester removal are discussed. These include enhanced surface interaction, catalyst platform development, improved light delivery systems and overall system energy requirements with a view towards pilot scale and industrial deployment.

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Photocatalytic degradation of dimethyl phthalate in aqueous TiO2 suspension: a modified Langmuir–Hinshelwood model

Cited by 27 publications

References 14 publications

Fabrication, Characterization and Response Surface Method (RSM) Optimization for Tetracycline Photodegration by Bi3.84W0.16O6.24- graphene oxide (BWO-GO)

Fabrication, Characterization and Response Surface Method (RSM) Optimization for Tetracycline Photodegration by Bi3.84W0.16O6.24- graphene oxide (BWO-GO)

TiO2 (Core)/Crumpled Graphene Oxide (Shell) Nanocomposites Show Enhanced Photodegradation of Carbamazepine

Removal of phthalates from aqueous solution by semiconductor photocatalysis: A review

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