Effect of photocurrent enhancement in porphyrin–graphene covalent hybrids

Tang, Jianguo; Niu, Lin; Liu, Jixian; Wang, Yao; Huang, Zhen; Xie, Shijie; Huang, Linjun; Xu, Qingsong; Wang, Yuan; Belfiore, Laurence A.

doi:10.1016/j.msec.2013.09.008

Cited by 26 publications

(29 citation statements)

References 37 publications

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“…The collected electrons in the conduction band of TiO 2 are transferred to the FTO through the 2D graphene network in the TGP compound . Graphene with high electrical conductivity cause to decrease the recombination of electron‐hole pairs in the TGP compound. The cycle is continued by the reduction of O 2 at the interface and by transfer of electrons from the reduced O 2 (

{normalO}_{2}^{-}

) to the porphyrin cation in TGP.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO₂ nanocomposite for visible light photoactivity improvement

Rahimi

Zargari

Ghaffarinejad

et al. 2015

Env Prog and Sustain Energy

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To use the visible light in photodegradation reactions efficiently, graphene–TiO2 nanocomposite was photosensitized using tetrakis(4‐carboxyphenyl)porphyrin. To investigate the effect of graphene as well as dye sensitization on the photoactivity of the synthesized photocatalyst, photocatalytic properties and photocurrent responses of the prepared samples were examined under visible light irradiation. A twofold increase of photocurrent response in the TG nanocomposite photosensitized with porphyrin (TGP) compared to TG (3%) nanocomposite provides an evidence of the effective influence of the porphyrin photosensitizer in the visible light photoactivity enhancement. There is a complete correspondence between the photocatalytic activity and photocurrent response of the photocatalysts. The photocatalytic properties of the photocatalysts were carried out in the degradation of methyl orange and bisphenol A under visible light irradiation. It was determined that TGP compound was stable after photocatalytic process and degraded 93% of methyl orange and 85% of bisphenol A in 240 min under visible light irradiation. Furthermore, the mechanism of investigation of the photocatalytic process determines that normalO2bold.− and OH. are the main reactive species for degradation of methyl orange and bisphenol A over the TGP compound under visible light irradiation. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 642–652, 2016

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{normalO}_{2}^{-}

) to the porphyrin cation in TGP.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO₂ nanocomposite for visible light photoactivity improvement

Rahimi

Zargari

Ghaffarinejad

et al. 2015

Env Prog and Sustain Energy

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“…In a couple of the reports aimed at the preparation of G‐based photoresponsive materials, GO was functionalized by an asymmetric metal‐free tetraarylporphyrin, through amide linkages between carboxylic groups from GO and p ‐aniline moieties of the porphyrin (Scheme ) . Attachment of the porphyrin unit to GO results in a significant partial quenching of the characteristic porphyrin fluorescence at λ emission about 650 and 720 nm, indicating the interaction between porphyrin singlet excited state and GO .…”

Section: Photoinduced Electron/energy Transfer Processes Using Organimentioning

confidence: 99%

“…[86] Similarly, benzylamine exfoliated Gh as been covalently functionalized using microwave-assisted Bingel reactionw ith cyclopropanated malonate units bearinge lectro-active tetrathiafulvalene moiety. [84] Other examples on the use of covalently modified Gs with active molecules andt heir applicationf or photoinduced electron/energy transfer process are based on the use of GO as starting material via amidation, [87][88][89][90][91][92][93][94] sulfonamidation, [95] as well as esterification. [96][97][98] In these cases, however, the extended p orbital of Ga nd, therefore, their physicochemical properties become modifiedb yt he presence of sp 3 domains that reduce the electrical conductivity of the resulting material.…”

Section: Heterogeneization Of Metal Complexes or Organic Units Using mentioning

confidence: 99%

Covalently Modified Graphenes in Catalysis, Electrocatalysis and Photoresponsive Materials

Navalón

Herance

Álvaro

et al. 2017

Chemistry A European J

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The ideal graphene is a one-atom thick single layer of carbon atoms having sp hybridation in hexagonal arrangement. Due to their large surface area and good dispersability in common solvents, graphenes are suitable platforms to anchor covalently units. The appended unit can introduce additional functionality to graphene. Although the field of covalently modified graphene is still starting compared to the development of other carbon nanoforms, there is already many examples describing the use of modified graphenes as recoverable photo-, electrocatalysts as well as in non-linear optics and to improve mechanical resistance and solubility of graphenes. In this Review, the state of the art of covalently modified graphenes for these applications is reviewed. After some general sections describing properties and characterization techniques of graphenes relevant to their use as supports and those general reactions and starting substrates to obtain the modified graphene conjugates, the main body of the review describes the preparation and properties of covalently modified graphene depending on their use as catalyst, photocatalyst, photoresponsive material, non-linear optics, electrocatalyst and other uses. The last section of the review summarizes the main achievements of the field and what should be according to our view the future developments.

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“…Some simple organic chromophores such as porphyrins, phthalocyanines, and azobenzene with very interesting optoelectronic properties have been covalently attached on graphene sheets [105][106][107][108][109]. Xu and Chen et al reported the first covalently bonded and organic soluble graphene hybrid with porphyrin via the formation of amide bonds between the carboxylic groups of GO and amino-porphyrin (Fig.…”

Section: Graphene-based Nanocompositementioning

confidence: 99%

Development of Graphene-Based Nanostructures

Cao¹

2017

Electrochemical Nanofabrication

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Effect of photocurrent enhancement in porphyrin–graphene covalent hybrids

Cited by 26 publications

References 37 publications

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO₂ nanocomposite for visible light photoactivity improvement

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO₂ nanocomposite for visible light photoactivity improvement

Covalently Modified Graphenes in Catalysis, Electrocatalysis and Photoresponsive Materials

Development of Graphene-Based Nanostructures

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Effect of photocurrent enhancement in porphyrin–graphene covalent hybrids

Cited by 26 publications

References 37 publications

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO2 nanocomposite for visible light photoactivity improvement

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO2 nanocomposite for visible light photoactivity improvement

Covalently Modified Graphenes in Catalysis, Electrocatalysis and Photoresponsive Materials

Development of Graphene-Based Nanostructures

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Product

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Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO₂ nanocomposite for visible light photoactivity improvement

Investigation of the synergistic effect of porphyrin photosensitizer on graphene–TiO₂ nanocomposite for visible light photoactivity improvement