Synergistically Enhanced Optical Limiting Property of Graphene Oxide Hybrid Materials Functionalized with Pt Complexes

Liu, Rui; Hu, Jinyang; Zhu, Senqiang; Lu, Jiapeng

doi:10.1021/acsami.7b10585

Cited by 53 publications

(19 citation statements)

References 60 publications

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“…However, pure ZnO and most semiconductor materials are very inefficient in absorbing light and have low photoefficiency per absorbing photon, ZnO can utilize only UV light (about 3% of the total sunlight), due to its large energy band (3.37 eV) . Graphene has remarkable charge mobility and provides conductive electron channels for electrons separation, which can inhibit the recombination of photogenerated‐hole pairs due to unpaired π electrons; on the other hand, the graphene can provide synergistic effect, and doping effect with materials to further increase the PEC performance of RGO/materials . In order to enhance the visible light absorption and photocatalytic efficiency, the RGO/semiconductor composite photocatalysts have been extensively researched in current year .…”

Section: Introductionmentioning

confidence: 99%

Influences of Graphene Nanosheets Coating on Selectively Exposed Crystal Facet ZnO

et al. 2018

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Graphene/ZnO composite attracting increasing attention due to great photoelectrochemical performance, however, graphene nanosheets tend to be coated on the one crystal plane of ZnO is rarely investigated. Herein, we synthesized different ZnO micro‐nanoparticles with selectively exposed crystal facet through a hydrothermal process by controlled some parameters such as temperature, concentration of reagents and reaction time, and the corresponding RGO/ZnO composites were obtained. Characterization by SEM and TEM, it was first time demonstrate that graphene nanosheets were tend to be coated on the (100) and (002) crystal facets of ZnO micro‐nanoparticles. We further discover that the largest exposed crystal facet of RGO/ZnO became (101) crystal plane. Regarding their performance in photocatalytic RhB degradation, exposed crystal facets of ZnO were found to impose crucial influence: the sample‘s photoelectrochemical properties are positively related to exposed degree of (101) facet, and it trend follows the order ZnO101 > RGO/ZnO101 > ZnO100 > RGO/ZnO100 > RGO/ZnO002 > ZnO002. Moreover, it can provide a new strategy that the films were coated on suitable crystal facet to change the photoelectrochemical properties of composite.

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Section: Introductionmentioning

confidence: 99%

Influences of Graphene Nanosheets Coating on Selectively Exposed Crystal Facet ZnO

et al. 2018

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“…NLO susceptibility of graphene-CdFe 2 O 4 enhanced was due to extent of conjugation with G layers [9]. In case of graphene-Pt, an enhanced NLO property was observed because of not only combination of light-induced electrons and energy transfer, but also the way their combined [10]. NLO property enhanced of graphene-TiO 2 could be attributed to the combination of NLO absorption mechanism and NLO scattering [11].…”

Section: Introductionmentioning

confidence: 95%

Facile One-Step Synthesis and Enhanced Optical Nonlinearity of Graphene-γMnS

Zhang

et al. 2019

Nanomaterials

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Graphene-γMnS were prepared by facile one-step hydrothermal method. Structures and properties of samples were explored by characterization, and nonlinear optical (NLO) enhancement of nanocomposites (NCs) was fully studied. Nanoparticles and NCs were tested at 532 nm by a Z-scan technique. With γMnS attached in G layers, NLO susceptibility of graphene-γMnS was greatly improved under single-pulse laser irradiation compared with G and γMnS. The nonlinearity enhanced was attributed to local field effect and charge transfer between γMnS and graphene layers. And NLO property enhancement was restricted by non-radiative defects in graphene-γMnS. Exploring the mechanism of nonlinearity enhancement was significant for fabrication of NLO devices. However, the optical nonlinearity decreased first and then increased with further increased addition of GO, because the dispersion of γMnS attached on graphene surface might make density of sp 2 fragment and defects changed. Graphene-γMnS exhibited excellent and tunable NLO performance, illustrating that NCs materials have potential applications in NLO devices. Nanomaterials 2019, 9, 1654 2 of 16 and graphene [12][13][14]. However, there are few reports about NLO performance of graphene-γMnS. In fact, we have previously studied αMnS/rGO without thoroughly investigating the nonlinearity of graphene-γMnS and the mechanism of NLO performance enhanced of NCs [15]. It is necessary to explore NLO responses of graphene-γMnS and its mechanism of enhanced nonlinearity.In this study, graphene-γMnS was synthesized by facile one-step hydrothermal method, and mechanism of NLO enhancement was discussed. Nonlinearity of NCs was controlled by changing amount of GO added, and samples were tested at 532 nm by picosecond (PS) laser pulse. We want to explore whether graphene-γMnS had potential applications in optical communication, optical limiter, and all-optical switch. Experiments Synthesis of Graphene Oxide ( GO) and Graphene-γMnSGO was prepared by improved Hummer method [16]. Firstly, graphite powder was oxidized to GO by KMnO 4 and 98% H 2 SO 4 . Then, a solution was mixed with H 2 O 2 and the mixture was washed several times with deionized water to remove impurities. Finally, products were dried at 45 • C for 48 h in vacuum drying oven. Improved Hammer method increased generation efficiency and oxidation degree of GO. Furthermore, this method could effectively prevent generation of toxic gases which caused harm to human body. High efficiency, high quality, and no toxicity in GO synthesis were important for large-scale production of GO.Graphene-γMnS was prepared by facile one-step hydrothermal method. The synthesis process of NCs was shown in Figure 1. Firstly, GO was dispersed in ethylene glycol. Secondly, TAA and MnCl 2 ·4H 2 O were added to GO suspension. After half-an-hour stirring, the solution was transferred to Teflon-lined stainless-steel autoclave and reacted at 170 • C for 6 h. The reaction temperature in our previous study was 190 • C and product was different [15]. Then, products wer...

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“…Materials with strong optical limiting activity can be used for protection of eyes and sensitive optical devices from laser‐induced damage. To date, various types of materials, including quantum dots, metal clusters, organic materials, carbon‐related materials, and phase‐transition materials have been investigated for control of luminous radiation . Although widely employed in research, these OL material candidates still suffer from insurmountable limitations, such as poor chemical and optical stability, complex synthesis process, and unexpected aggregation of nanostructure …”

Section: Introductionmentioning

confidence: 99%

Transparent niobate glass‐ceramics for optical limiting

et al. 2019

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The construction of nonlinear optical materials featuring asymmetric transmission of light is of great technological importance for various applications, including optical switching and optical power limiting. A significant challenge is the scalable fabrication of material candidates with good photochemical stability, high optical transmittance, and excellent optical limiting performance. Here, we present a nanocrystallization avenue for constructing hybrid optical limiting materials that exhibit ultrafast and robust optical limiting performance. The experimental resultsshow that the controllable relaxation of a niobate glass may lead to the clustering of Nb-O units and contracting of the bandgap. It results in the notable improvement in nonlinear optical properties, including the enhanced saturation irradiance (380 GW/cm 2 ), doubly increased nonlinear coefficient, and decreased limiting threshold (200 GW/cm 2 ). Our results suggest a promising material that exhibits promising applications for protecting eyes and sensitive components from laserinduced damage.

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Synergistically Enhanced Optical Limiting Property of Graphene Oxide Hybrid Materials Functionalized with Pt Complexes

Cited by 53 publications

References 60 publications

Influences of Graphene Nanosheets Coating on Selectively Exposed Crystal Facet ZnO

Influences of Graphene Nanosheets Coating on Selectively Exposed Crystal Facet ZnO

Facile One-Step Synthesis and Enhanced Optical Nonlinearity of Graphene-γMnS

Transparent niobate glass‐ceramics for optical limiting

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