Heteroatom doped graphene in photocatalysis: A review

Putri, Lutfi Kurnianditia; Ong, Wee‐Jun; Chai, Siang‐Piao

doi:10.1016/j.apsusc.2015.08.177

Cited by 311 publications

(124 citation statements)

References 120 publications

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“…8,9 Until now, many heteroatoms (e.g., O, N, B, P, I and S) have been successfully doped into graphene, 10,11 for example, doping N or P atoms was revealed to be effective in enhancing the activity of graphene for photocatalytic hydrogen evolution. [12][13][14] Compared with single element doping strategy, co-doping graphene by two or more kinds of different elements is expected to be more efficient in photocatalytic enhancement of graphene, since it can create a unique electronic structure with a synergistic coupling effect between these heteroatoms.…”

Section: Introductionmentioning

confidence: 99%

Graphene with Atomic-Level In-Plane Decoration of h-BN Domains for Efficient Photocatalysis

Wang

Tang

et al. 2017

Chem. Mater.

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We report here a facile synthesis of graphene decorated with in-plane boron nitride domains (BN-G) and uncover that the formation of BN domains in graphene is critical for engineering the band gap and resulting in an improved activity for photocatalytic hydrogen generation. ABSTRACT: Band gap opening and engineering is one of the tremendous aims in developing novel materials for photocatalytic hydrogen generation. We report here a facile synthesis of graphene decorated with in-plane boron nitride domains by controlling both the doping sequence of heteroatoms and the oxygen content of graphene precursor, 3 showing significant differences in the doping pattern compared with B and/or N singleor co-doped graphene. We uncover that the formation of BN domains in graphene is critical for engineering the band gap and resulting in an improved activity for photocatalytic hydrogen generation in the absence of any photosensitizer. This work paves the way for the rational design and construction of graphene-based photocatalysts for efficient photocatalysis.

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Section: Introductionmentioning

confidence: 99%

Graphene with Atomic-Level In-Plane Decoration of h-BN Domains for Efficient Photocatalysis

Wang

Tang

et al. 2017

Chem. Mater.

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“…The holes tend to penetrate the layer of rGO, and the electrons create a cathode ray on the surface of rGO. Subsequently, these electrons can be disseminated toward CB of ZnS :

Ag‐ZnS/rGO + h ν \to {Ag‐ZnS/rGO}^{+} + {normale}^{-} false\to Ag‐ZnS false(e_{CB}^{-}) / {rGO}^{+}

…”

Section: Resultsmentioning

confidence: 99%

Ultrasound‐assisted Synthesis of Ag‐ZnS/rGO and its Utilization in Photocatalytic Degradation of Tetracycline Under Visible Light Irradiation

Kameli

Mehrizad

2018

Photochem & Photobiology

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Recent improvements based on heterojunction nanocomposites have opened new possibilities in photocatalysis. In this research, an ultrasound-assisted coprecipitation method was used to fabricate silver, zinc sulfide and reduced graphene oxide (Ag-ZnS/rGO) nanocomposite, and characterization results indicated that 3% Ag-ZnS spherical nanoparticles are successfully embedded in rGO matrix. The potential of the Ag-ZnS/rGO, as a visible light active photocatalyst, was assessed through optimizing degradation of Tetracycline (TC) by response surface methodology. It was found that the photocatalytic degradation of TC increased with an increase in the amount of nanocomposite and irradiation time, whereas it decreased with increasing the initial TC concentration. Under the optimal conditions (10 mg L of TC, 1.25 g L of Ag-ZnS/rGO, at pH = 7, and irradiation duration 110 min), more than 90% of the TC was degraded. The study of the mechanism of the photocatalytic process disclosed that the synergistic role of surface plasmon resonance (SPR) induced by Ag nanoparticles and p-type semiconductor feature of rGO leads to ZnS semiconductor stimulation in the visible light region. Eventually, a pseudo-first order kinetics model was developed based on the proposed mechanism. The obtained results highlight the role of Ag-ZnS/rGO nanophotocatalyst toward degradation of some antibiotics under visible light.

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“…Heteroatom (O, N, B, P and S) doped GR exhibits improved conductive and optical properties and it favors the formation of heterojunctions which facilitate charge generation and transportation and therefore enhance its photocatalytic activity [141][142].…”

Section: Composite Photocatalysts Based On Graphene (Gr)mentioning

confidence: 99%