Silica nanocrystal/graphene composite with improved photoelectric and photocatalytic performance

Yang, Lingang; Wang, Lingzhi; Xing, Mingyang; Lei, Juying; Zhang, Jinlong

doi:10.1016/j.apcatb.2015.06.026

Cited by 34 publications

(14 citation statements)

References 36 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The functionalized sample GO‐NH2 faced a decrease in the intensity of the peaks related to GO, while for GO‐SH the diffraction patterns related to GO disappeared. These results can be correlated with previous reports which showed that the diffraction peak become weaker or even disappear when graphene oxide are covered or functionalized with metal oxide such as SiO 2 , MnO 2 or TiO 2 . Moreover, a broad and very weak peak at 25° was observed for both functionalized samples.…”

Section: Resultssupporting

confidence: 91%

Pd Nanoparticles Immobilized on Graphene Oxide/Silica Nanocomposite: Efficient and Recyclable Catalysts for Cross‐Coupling Reactions

Oliveira

Landers

et al. 2018

ChemistrySelect

View full text Add to dashboard Cite

Pd nanoparticles were synthesized on non‐functionalized and functionalized graphene oxide with thiol and amine groups. The resulting materials were used as recyclable catalysts to study the influence of the functional groups and compare their activity and stability to non‐functionalized graphene oxide and commercial catalysts in the Heck and Suzuki reactions. The catalyst based on non‐functionalized GO and commercial catalysts lost their activity quickly because of particle growth (Oswald ripening). However, the presence of functional groups reduces significantly the metal particle growth producing more efficient catalysts for the Heck and the Suzuki reactions. Moreover, the synthesized catalysts were capable of catalyzing the Heck and Suzuki reactions using different substrates, achieving good activities and selectivities in all cases.

show abstract

Section: Resultssupporting

confidence: 91%

Pd Nanoparticles Immobilized on Graphene Oxide/Silica Nanocomposite: Efficient and Recyclable Catalysts for Cross‐Coupling Reactions

Oliveira

Landers

et al. 2018

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…Incorporating these features via formation of graphene/SiO2 nanocomposites provides a superior channel for enhancement of the photocatalytic performance as compared to other carbonaceous nanocomposites or SiO2 alone. 41 The combined assembly of SiO2 and graphene also makes possible the covalent and non-covalent attachments of drugs on graphene by π-π interactions. This makes it a suitable nano-carrier for delivering drug to target cancer sites.…”

mentioning

confidence: 99%

Graphene/SiO2 nanocomposites: The enhancement of photocatalytic and biomedical activity of SiO2 nanoparticles by graphene

Arshad

Iqbal

Mansoor

et al. 2017

Journal of Applied Physics

View full text Add to dashboard Cite

ABSTRACT:The exceptional conducting nature of graphene makes it a viable candidate for enhancing the effectiveness of photocatalytic and biomedical nanomaterials. Herein, the immobilization of monodispersed silicon dioxide (SiO2) nanoparticles on multiple graphene layers is demonstrated for intercalation of graphene nanoplatelets (GNPs). Interestingly, the loading of graphene nanoplatelets with SiO2 nanoparticles enhances the photocatalytic efficiency from 46% to 99%. For biomedical applications, it is found that 75% of Gram positive and 50% of Gram negative bacteria have been killed, hence bacterial proliferation is significantly restricted. Further, the cytotoxicity study reveals that the synthesised nanocomposites are non-toxic for both normal (HCEC) and cancerous (MCF-7, HEp-2) cell lines which signifies their potential as carriers for drug delivery. The prepared nanocomposites with controlled amount of carbon in the form of graphene can be employed for photocatalysis based waste water remediation, biomedicine and nano drug delivery.

show abstract

“…One major factor is the interfacial interaction between the graphene and the semiconductor, which is considered essential for the effective transfer of photoinduced electrons. [9,10] The decreased electron-hole recombination and extended charge-carrier lifetime resulting from the electron transfer is proposed as the key factor for improving the photocatalytic performance of graphene-based semiconductor photocatalysts. [11] Typically, the increased tightness and contact area of the interfacial coupling between the graphene and semiconductor are favorable for an efficient electron transfer.…”

Section: Introductionmentioning

confidence: 99%

“…[11] Typically, the increased tightness and contact area of the interfacial coupling between the graphene and semiconductor are favorable for an efficient electron transfer. [10] Up to date, the most widely reported configuration of graphene-based semiconductor photocatalyst is semiconductor nanoparticles being homogeneously distributed on the graphene sheets. [12][13][14][15][16][17][18][19][20][21] However, the contact area between the 2D graphene sheets and the semiconductor nanoparticles in this configuration is small, which limits the electron transfer from the semiconductor nanoparticles to the graphene.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to strengthen the interfacial coupling, another effective method to optimize the photocatalytic activities is improving the quality of individual components. [29,30] Semiconductor nanoparticles, [10,31] nanospheres, [27] nanorods, [32,33] and nanowires [34,35] have been used to construct the graphene-based semiconductor photocatalyst. Among them, one-dimensional (1D) semiconductor nanostructures received the most attention, which can offer a direct pathway for the photogenerated charges.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reduced graphene oxide three-dimensionally wrapped WO3 hierarchical nanostructures as high-performance solar photocatalytic materials

Tang

Zhang

et al. 2016

Applied Catalysis A: General

View full text Add to dashboard Cite

A unique reduced graphene oxide (RGO) three-dimensionally wrapped WO 3 (WO 3 @RGO) composite was synthesized via a facile one-step hydrothermal method. In this composite, the building blocks of the WO 3 hierarchical structure, the nanobelts, were intimately wrapped by a layer of RGO. Due to the synergistic effect of the hierarchical structure of WO 3 and intimately wrapped RGO on the surface of the nanobelts, the WO 3 @RGO showed much higher photocatalytic performance in degrading rhodamine B and phenol under simulated solar light irradiation than the bare WO 3 and other composites in which only the mainframe of WO 3 was wrapped by RGO. Moreover, the photocatalytic activity was significantly influenced by the loading amount of RGO. The optimal performance was found in the 1.2% WO 3 @RGO, which was about 2.50 times that of the bare WO 3. Conclusively, using graphene to wrap the building blocks rather than only the mainframe

show abstract

Silica nanocrystal/graphene composite with improved photoelectric and photocatalytic performance

Cited by 34 publications

References 36 publications

Pd Nanoparticles Immobilized on Graphene Oxide/Silica Nanocomposite: Efficient and Recyclable Catalysts for Cross‐Coupling Reactions

Pd Nanoparticles Immobilized on Graphene Oxide/Silica Nanocomposite: Efficient and Recyclable Catalysts for Cross‐Coupling Reactions

Graphene/SiO2 nanocomposites: The enhancement of photocatalytic and biomedical activity of SiO2 nanoparticles by graphene

Reduced graphene oxide three-dimensionally wrapped WO3 hierarchical nanostructures as high-performance solar photocatalytic materials

Contact Info

Product

Resources

About