Photocatalytic decomposition of perfluorooctanoic acid by iron and niobium co-doped titanium dioxide

Estrellan, Carl Renan; Salim, Chris; Hinode, Hirofumi

doi:10.1016/j.jhazmat.2010.02.060

Cited by 83 publications

(40 citation statements)

References 24 publications

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“…Improved performance of TiO 2 under visible light is achieved up to an optimal doping level, after which performance deteriorates when the dopants become recombination centers for photogenerated electron-hole pairs [95]. A variety of rare metal dopants, including niobium (Nb), tungsten (W) and samarium (Sm) have been used in the codoping technique by several researchers [96][97][98]. As with the other classes of dopants, Nb prevents the recombination of free electron and energized hole and extends the wavelength of absorbance of TiO 2 to increase its functionality.…”

Section: Effect Of Codopingmentioning

confidence: 99%

“…As with the other classes of dopants, Nb prevents the recombination of free electron and energized hole and extends the wavelength of absorbance of TiO 2 to increase its functionality. [97]. Ti atoms have been replaced with W atoms to form W-O-Ti bonds, which can induce the formation of the anatase phase as well as act as electron traps to suppress the recombination of energized holes and free electrons.…”

Section: Effect Of Codopingmentioning

confidence: 99%

“…In the co-doping technique, the functions of metal dopants are generally to facilitate the charge separation of free electrons and energized holes and to decrease their recombination [97][98][99]. On the other hand, the functions of nonmetal dopants are generally to shift the absorption region of TiO 2 from the UV light region to the visible light region, besides narrowing the band gap of TiO 2 [100][101][102].…”

Section: Effect Of Codopingmentioning

confidence: 99%

“…carbon (C) and iodine (I) are similarly used as dopants to improve the performance and properties of TiO 2 [101]. The co-doping technique generates synergistic effects which enhance the properties of the final TiO 2 product [74,[96][97][98][99][100][101][102][103][104][105][106][107][108][109]. For example, when W and N are co-doped to TiO 2 , the excited electrons are easily transferred from valence band into the new conduction band due to the narrowing of the band gap difference, while the recombination of free electrons and holes are not permitted [98].…”

Section: Effect Of Codopingmentioning

confidence: 99%

“…A list of physicalchemical properties of co-doped TiO 2 and its advantages is given in Table 4. Three main benefits of co-doping are (1) high percentage of the anatase phase can be obtained, (2) phase transformation of the anatase phase to the rutile phase is inhibited, and (3) small crystallite size and high specific surface area of TiO 2 are obtained [74,[96][97][98][99][100][101][102][103][104][105][106][107][108][109].…”

Section: Isrn Materials Sciencementioning

confidence: 99%

See 4 more Smart Citations

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Tan

Wong

Mohamed

2011

ISRN Materials Science

111

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This paper aims to review and summarize the recent works on the photocatalytic degradation of various organic pollutants in the presence of nano-doped-TiO 2 photocatalysts. In this regard, three main aspects are examined: (a) the presence of various dopants (metal dopants, nonmetal dopants, halogen dopants, metalloid dopants, and codopants) in the formation of nano-doped-TiO 2 photocatalysts, (b) the effect of the presence of dopants on the photocatalytic degradation of organic pollutants, and (c) the effects of various operating parameters on the photocatalytic degradation of organic pollutants in the presence of nano-doped-TiO 2 photocatalysts. Reports resulted suggest that the formation of a high percentage of the anatase phase, small crystallite size, and high specific surface area of the nano-doped-TiO 2 photocatalysts depends on the presence of various dopants in the photocatalysts. The majority of the dopants have the potential to improve the photocatalytic efficiency of nano-doped-TiO 2 in the degradation of organic pollutants. The photocatalytic degradation of organic compounds depends on the calcination temperature of the prepared doped TiO 2 , initial reactant concentration, dosage of doped TiO 2 , and dopant doping concentration.

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Section: Effect Of Codopingmentioning

confidence: 99%

Section: Effect Of Codopingmentioning

confidence: 99%

Section: Effect Of Codopingmentioning

confidence: 99%

Section: Effect Of Codopingmentioning

confidence: 99%

Section: Isrn Materials Sciencementioning

confidence: 99%

See 3 more Smart Citations

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Tan

Wong

Mohamed

2011

ISRN Materials Science

111

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Organo‐Pillared‐Clay: Synthesis, Characterization, and Applications for Treatment of Perfluoroalkyl Substances

Scapan,

Hassler,

Piribauer

et al. 2023

Chemie Ingenieur Technik

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Anthropogenic toxic pollutants are ubiquitous and need to be removed from the environment. This study investigates the preparation of an inorganic‐organic modified clay (organo‐pillared‐clay) for the removal of contaminants. The present work investigates the compositional, structural and sorption properties of modified clay materials for the removal of perfluoroheptanoic acid (PFHpA). The chemical compositions of the clay materials used were determined by interlayer and surface analysis. The results showed changes in interlayer spacing and external surface area due to modification and surfactant addition during the cation exchange reaction. The combination of adsorption and irradiation increased removal efficiency, although photodegradation was partially inhibited. Modified clays show promise for PFHpA remediation, with potential for optimizing photodegradation processes.

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Adsorption for perfluorooctanoic acid with graphitic‐phase carbon nitride and its HPLC fluorescence determination

Yang

Jiang

et al. 2019

Can J Chem Eng

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In this paper, graphitic‐phase carbon nitride (g‐C3N4) was prepared from urea and detected by FTIR, XRD, SEM, TEM, Boehm titration, zeta potential, and N2 adsorption‐desorption analyzes, demonstrating that g‐C3N4 possesses a thin sheet structure, negative surface, and strong alkalinity. Considering the alkaline groups and huge areas, g‐C3N4 was employed to adsorb perfluorooctanoic acid (PFOA). The adsorption capacity of g‐C3N4 towards PFOA was evaluated by batch adsorption experiments, indicating the considerable adsorption capacity of 120.879 mg g−1. The isothermal models and kinetic models were also performed in order to study the adsorption process, proving that PFOA adsorption was fitted by the Langmuir isothermal model and pseudo second‐order model. In addition, residual PFOA concentration after adsorption was determined by high performance liquid chromatography (HPLC) with a fluorescence detector after being derived with 3‐(2‐bromoacetyl) coumarin (3‐BrAC). The HPLC fluorescent detection showed satisfied linearity from 0.5 to 20.0 ug mL−1 with a sound R 2 of 0.9992. This is the first time that g‐C3N4 was applied to PFOA adsorption from aqueous solutions with outstanding adsorption capacity.

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Photocatalytic decomposition of perfluorooctanoic acid by iron and niobium co-doped titanium dioxide

Cited by 83 publications

References 24 publications

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Organo‐Pillared‐Clay: Synthesis, Characterization, and Applications for Treatment of Perfluoroalkyl Substances

Adsorption for perfluorooctanoic acid with graphitic‐phase carbon nitride and its HPLC fluorescence determination

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