Reduced graphene oxide (RGO) on TiO2 for an improved photoelectrochemical (PEC) and photocatalytic activity

Tayebi, Meysam; Kolaei, Morteza; Tayyebi, Ahmad; Masoumi, Zohreh; Belbasi, Zeynab; Lee, Byeong–Kyu

doi:10.1016/j.solener.2019.08.020

Cited by 124 publications

(50 citation statements)

References 43 publications

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“…The thermal stability of the synthesized MOFs is dependent upon framework topology, but is not influenced either by coordination number or by local coordination environment. [31,32] This substantiates the presence of the highest number of coordinated NH 2 BDC molecules in heterometallic MOF compared with that of homometallic. Besides, the extra bonding between Ce and Fe also helps in stabilising the framework.…”

Section: Photo Properties: Orbital Arrangementssupporting

confidence: 56%

Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property

Kuila

Saravanan

2020

Applied Organom Chemis

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A structurally stable, 3d-4f heterometallic coordination polymer has been solvothermally synthesised and evaluated for its accomplished materials properties. The light absorption activity in the visible band was higher for unique Ce-Fe MOF than that of the homometallic Ce-MOF or Fe-MOF. The intimate overlap of two different metal clusters in heterometallic environmental induced the formation of low line conduction orbital, which ultimately lowered the transition energy. The heterometallic acquired an additional sensitisation from a Fe-μ3-oxo cluster that had vibrantly enhanced the light uptake activity. The vacancy created in the 6s, 5d orbital of Ce in Ce-Fe MOF contributed to the photo-excitation of electrons and reduced the recombination time. This distinct intramolecular arrangement assisted the exciton trapping characteristic. Also, the presence of multiple metal cores in the framework aided to confine the increased number of excitons for a redox reaction. The solar photocatalysis study with acetaminophen revealed these improved materialistic features by degrading it 94.6% with a rate constant of 0.0137 min −1. The recycle studies confirmed the robust stability of the synthesised MOF.

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Section: Photo Properties: Orbital Arrangementssupporting

confidence: 56%

Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property

Kuila

Saravanan

2020

Applied Organom Chemis

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“…When changing from a bulk material to a 2D material, the bandgap length is modified from an indirect bandgap of 1.4 eV to a direct bandgap of 2 eV. This change in the bandgap makes it an extremely interesting material for a wide range of applications [41] , [42] , [43] , [44] , [45] . The use of MoS 2 could also improve the separation of photogenerated electron-hole pairs in the α-Fe 2 O 3 photoanode [46] , [47] .…”

Section: Introductionmentioning

confidence: 99%

Ultrasonication-assisted liquid-phase exfoliation enhances photoelectrochemical performance in α-Fe2O3/MoS2 photoanode

Masoumi

Tayebi

Lee

2021

Ultrasonics Sonochemistry

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“…10-20 nm) can be observed as well as a higher absorption in the visible range of light spectrum for the composite samples compared to pristine TiO 2 nanotubes, which could be attributed to the electronic interactions between cyanographene and TiO 2 nanotubes [33,53]. Such an extended optical absorption has also been studied in an enormous number of scientific works related to the functionalization of semiconductors with nanocarbons (e.g., CNT and rGO) [54][55][56]. The high resolution XPS C1s, Ti2P and Pt4f spectra of the G-Pt-NTs composite are presented in Figure 3d-f. As it can be seen in Figure 3d, the four peaks at 284.5, 286.0, 287 and 288.8 eV correspond to C-C, C-N, C=O and O=C-O, respectively, which is in line with the reported results for pristine cyanographene [42].…”

Section: Resultsmentioning

confidence: 86%

Multi-Leg TiO2 Nanotube Photoelectrodes Modified by Platinized Cyanographene with Enhanced Photoelectrochemical Performance

et al. 2020

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Highly ordered multi-leg TiO2 nanotubes (MLTNTs) functionalized with platinized cyanographene are proposed as a hybrid photoelectrode for enhanced photoelectrochemical water splitting. The platinized cyanographene and cyanographene/MLTNTs composite yielded photocurrent densities 1.66 and 1.25 times higher than those of the pristine MLTNTs nanotubes, respectively. Open circuit VOC decay (VOCD), electrochemical impedance spectroscopy (EIS), and intensity-modulated photocurrent spectroscopy (IMPS) analyses were performed to study the recombination rate, charge transfer characteristics, and transfer time of photogenerated electrons, respectively. According to the VOCD and IMPS results, the addition of (platinized) cynographene decreased the recombination rate and the transfer time of photogenerated electrons by one order of magnitude. Furthermore, EIS results showed that the (platinized) cyanographene MLTNTs composite has the lowest charge transfer resistance and therefore the highest photoelectrochemical performance.

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Reduced graphene oxide (RGO) on TiO2 for an improved photoelectrochemical (PEC) and photocatalytic activity

Cited by 124 publications

References 43 publications

Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property

Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property

Ultrasonication-assisted liquid-phase exfoliation enhances photoelectrochemical performance in α-Fe2O3/MoS2 photoanode

Multi-Leg TiO2 Nanotube Photoelectrodes Modified by Platinized Cyanographene with Enhanced Photoelectrochemical Performance

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