Enhanced visible light photocurrent response and photodegradation efficiency over TiO2–graphene nanocomposite pillared with tin porphyrin

Zargari, Solmaz; Rahimi, Rahmatollah; Ghaffarinejad, Ali; Morsali, Ali

doi:10.1016/j.jcis.2015.12.046

Cited by 42 publications

(17 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This suggests that the self‐sensitized photodegradation of MO could hardly occur under the experimental conditions of this study. A similar phenomenon was also observed in the work of other researchers . On the contrary, P25 exhibits visible light activity for RhB degradation as shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the produced

O_{2}^{• -}

could react with H 2 O and H + to produce radical hydroxyl •OH . This result indicates that

O_{2}^{• -}

and •OH are the main reactive agents in the photocatalytic process, and a probably dual mechanism involving both the

O_{2}^{• -}

and •OH radical oxidation is expected in the photocatalysis process of the SCT catalyst . The looping between Ce 4+ and Ce 3+ constitutes a Ce 4+ /Ce 3+ redox process, in which O ad plays as an electron acceptor.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Sulfated Ce‐doped TiO₂ as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance

Liu

Lü

et al. 2016

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Sulfated Ce‐doped TiO2 photocatalysts, with improved visible light photocatalytic activity, are prepared by sol‐gel method and via impregnation with diluted sulfuric acid. The synthesized samples are characterized by means of X‐ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet–visible diffuse reflectance spectra (UV–Vis DRS), Fourier transform infrared (FTIR) spectroscopy, temperature‐programmed desorption of ammonia (NH3‐TPD) and X‐ray photoelectron spectroscopy (XPS). To investigate the effect of Ce doping as well as acid sites on the photoactivity of the synthesized photocatalyst, photocatalytic degradation of Rhodamine B in an aqueous solution is used as a probe reaction to evaluate the photocatalytic activity of the as‐prepared samples under visible light irradiation. It reveals that Ce doping can improve the photocatalytic response of TiO2 to visible light and the presence of Ce4+/Ce3+ redox process facilitates the separation of photo‐generated electrons and holes. In addition, the impregnation can create Lewis acid sites on the obtained catalyst surface. Lewis acid sites on the catalyst surface could increase the amount of adsorbed oxygen (Oad) and consequently improve the transform efficiency of Ce3+ to Ce4+. Thereafter an increase in the phtocatalytic activity of sulfated Ce‐doped TiO2 is achieved. The possible mechanism of RhB degradation by sulfated Ce‐doped TiO2 photocatalyst is preliminarily discussed. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 494–504, 2017

show abstract

Section: Resultsmentioning

confidence: 99%

“…As a result, the produced

O_{2}^{• -}

could react with H 2 O and H + to produce radical hydroxyl •OH . This result indicates that

O_{2}^{• -}

and •OH are the main reactive agents in the photocatalytic process, and a probably dual mechanism involving both the

O_{2}^{• -}

Section: Resultsmentioning

confidence: 99%

Sulfated Ce‐doped TiO₂ as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance

Liu

Lü

et al. 2016

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…We anticipated that HPW@MIL‐53(Fe) can exhibit both the advantages of bulk HPW and MIL‐53(Fe) in removal of Rhodamine B (RhB) under visible light irradiation. Different from some other research on photocatalysis , a low power light‐emitting diode (LED) lamp was used as visible light source as it is small in size, energy efficient, compact, has a relatively long life span, and can be facile to operate.…”

Section: Introductionmentioning

confidence: 99%

Phosphotungstic acid encapsulated in MIL‐53(Fe) as efficient visible‐light photocatalyst for rhodamine B degradation

Guo

Gao

et al. 2017

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Materials based on phosphotungstic acid (H 3 PW 12 O 40 , HPW) encapsulated in metal organic framework MIL-53(Fe) were prepared by a simple solvothermal method. The assynthesized samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectra, and UV-vis diffuse reflectance spectroscopy method. The resulting materials were evaluated in the photodecomposition of cationic dye Rhodamine B (RhB) under visible light irradiation. A Light-emitting diodes lamp was used as visible light source. The results showed that the composites exhibited better photocatalytic activities than pure materials. A possible photocatalytic reaction mechanism has been investigated. The formation of active oxygen species such as • OH and • O 2 2 , which are detected during the degradation of RhB, is proposed to be responsible for the degradation of RhB. In addition, the HPW@MIL-53(Fe) photocatalyst exhibited good chemical stability after five consecutive degradation cycles.

show abstract

“…Developing high efficiency semiconductors photocatalysts [1][2][3][4] have become the research hotspot to decompose effectively harmful organic contaminants for solving environment problems. Among the various photocatalysts, the polymeric graphitic carbon nanostructures have been more and more widely concerned due to its unique inherent characteristic.…”

Section: Introductionmentioning

confidence: 99%

“…Among the various photocatalysts, the polymeric graphitic carbon nanostructures have been more and more widely concerned due to its unique inherent characteristic. Defect-free graphene has an infinite number of repetitive elements, with the smallest being any of its sp 2 -hybridized carbon atoms, whose one p orbital and three sp 2 orbitals are filled with one electron each. These carbon atoms correspond to the smallest repetitive chain segments representing the repeating units of common linear polymers [5].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Photoactive 3D Polymer Pillared with Metalloporphyrin

Zargari¹,

Rahimi²,

A³

2017

J Material Sci Eng

View full text Add to dashboard Cite

Among the very few efforts for the preparation of stable pillared graphene nanostructures, there is no report of tin porphyrin intercalated between TiO 2 -graphene (TG) nanosheets. In this study, a nanostructure material of pillared graphene made of tin porphyrin functionalized graphene-TiO 2 composite (TG) was successfully synthesized. The prepared compound showed high activity in the photodegradation reaction under irradiation of visible light.Photocatalytic results showed that the composite of graphene-TiO 2 containing 3% graphene had the highest photoactivity. The photoactivity of TG (3%) was about 1.5 times higher than that of the pure TiO 2 .Besides, tin porphyrin-pillared TG composite (TGSP) material exhibited an excellent visible light photocatalytic performance in degradation of methyl orange dye. This compound could destruct 100% of methyl orange dye in 180 min. Such pillared carbon nanostructure exhibited unique photoactivity due to the synergistic effect between the graphene sheets and the SnTCPP pillars. It is found that the highly efficient light-harvesting structure of the SnTCPP pillared TG composite can be attributed to densely embedded porphyrin chromophores with high visible absorptivity within the framework. The investigation of photocatalytic mechanism determined that hydroxyl radical is a main species in photodegradation process of methyl orange over TGSP compound.

show abstract

Enhanced visible light photocurrent response and photodegradation efficiency over TiO2–graphene nanocomposite pillared with tin porphyrin

Cited by 42 publications

References 45 publications

Sulfated Ce‐doped TiO₂ as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance

Sulfated Ce‐doped TiO₂ as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance

Phosphotungstic acid encapsulated in MIL‐53(Fe) as efficient visible‐light photocatalyst for rhodamine B degradation

Preparation of a Photoactive 3D Polymer Pillared with Metalloporphyrin

Contact Info

Product

Resources

About

Enhanced visible light photocurrent response and photodegradation efficiency over TiO2–graphene nanocomposite pillared with tin porphyrin

Cited by 42 publications

References 45 publications

Sulfated Ce‐doped TiO2 as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance

Sulfated Ce‐doped TiO2 as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance

Phosphotungstic acid encapsulated in MIL‐53(Fe) as efficient visible‐light photocatalyst for rhodamine B degradation

Preparation of a Photoactive 3D Polymer Pillared with Metalloporphyrin

Contact Info

Product

Resources

About

Sulfated Ce‐doped TiO₂ as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance

Sulfated Ce‐doped TiO₂ as visible light driven photocatalyst: Preparation, characterization and promotion effects of Ce doping and sulfation on catalyst performance