Targeted thiolation of graphene oxide and its utilization as precursor for graphene/silver nanoparticles composites

Orth, Elisa S.; Fonsaca, Jéssica E. S.; Domingues, Sergio H.; Mehl, Hiany; Oliveira, Marcela M.; Zarbin, Aldo J. G.

doi:10.1016/j.carbon.2013.05.032

Cited by 75 publications

(78 citation statements)

References 42 publications

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“…Functionalization of GONR with cysteamine -CA was carried out according to our previously developed method [11], where a GONR dispersion (50 mL of 0.08 mg mL À1 ) was mixed with 0.015 mol of N-hydroxysuccinimide -NHS and N-(3-dimethy laminopropyl)-N 0 -ethylcarbodiimide hydrochloride -EDC in a 50 mL round-flask, under an ice-bath. After stirring vigorously for 2 h, 0.078 mmol of CA hydrochloride 98% were added to the mixture and left stirring overnight at room temperature.…”

Section: Functionalization Of Gonr With Cysteaminementioning

confidence: 99%

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Graphene nanoribbons inducing cube-shaped Ag nanoparticle assemblies

Fonsaca

Elías

Domingues

et al. 2015

Carbon

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Section: Functionalization Of Gonr With Cysteaminementioning

confidence: 99%

“…electrostatic/hydrophobic. Some of us have previously reported a method for the synthesis of graphene derivatives-based nanocomposites [11], which demonstrated the targeted functionalization by covalent bonds of passivating groups (e.g. thiol) on graphene domains.…”

Section: Introductionmentioning

confidence: 99%

Graphene nanoribbons inducing cube-shaped Ag nanoparticle assemblies

Fonsaca

Elías

Domingues

et al. 2015

Carbon

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“…In comparison to many of the processes already reported in the 334 literature, the Tollens method is advantageous since it applies a non-toxic and an 335 environmental friendly molecule as a reducing agent. Moreover, the chemical reaction does 336 not require high temperatures or the use of aggressive organic solvents [23,24,34,35]. 337…”

Section: Physicochemical Characteristics Of Go and Goag Nanocompositementioning

confidence: 99%

“…Thermogravimetric analysis was carried 347 out to investigate the thermal decomposition pattern of both GO and GOAg ( Figure S1C). 348 TGA curves also provide information about the silver content in the GOAg sample [23,24]. 349…”

Section: Physicochemical Characteristics Of Go and Goag Nanocompositementioning

confidence: 99%

Thin-film composite forward osmosis membranes functionalized with graphene oxide–silver nanocomposites for biofouling control

Faria

Liu

Xie

et al. 2017

Journal of Membrane Science

181

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Elimelech, M. (2017). Thin-film composite forward osmosis membranes functionalized with graphene oxide-silver nanocomposites for biofouling control. Journal of Membrane Science, Thin-film composite forward osmosis membranes functionalized with graphene oxide-silver nanocomposites for biofouling control AbstractInnovative approaches to prevent bacterial attachment and biofilm growth on membranes are critically needed to avoid decreasing membrane performance due to biofouling. In this study, we propose the fabrication of anti-biofouling thin-film composite membranes functionalized with graphene oxide-silver nanocomposites. In our membrane modification strategy, carboxyl groups on the graphene oxide-silver nanosheets are covalently bonded to carboxyl groups on the surface of thin-film composite membranes via a crosslinking reaction. Further characterization, such as scanning electron microscopy and Raman spectroscopy, revealed the immobilization of graphene oxide-silver nanocomposites on the membrane surface. Graphene oxide-silver modified membranes exhibited an 80% inactivation rate against attached . Pseudomonas aeruginosa cells. In addition to a static antimicrobial assay, our study also provided insights on the anti-biofouling property of forward osmosis membranes during dynamic operation in a cross-flow test cell. Functionalization with graphene oxide-silver nanocomposites resulted in a promising anti-biofouling property without sacrificing the membrane intrinsic transport properties. Our results demonstrated that the use of graphene oxide-silver nanocomposites is a feasible and attractive approach for the development of antibiofouling thin-film composite membranes. Innovative approaches to prevent bacterial attachment and biofilm growth on membranes are 28 critically needed to avoid decreasing membrane performance due to biofouling. In this study, 29we propose the fabrication of anti-biofouling thin-film composite membranes functionalized 30 with graphene oxide−silver nanocomposites. In our membrane modification strategy, 31 carboxyl groups on the graphene oxide−silver nanosheets are covalently bonded to carboxyl 32 groups on the surface of thin-film composite membranes via a crosslinking reaction. Further 33 characterization, such as scanning electron microscopy and Raman spectroscopy, revealed the 34 immobilization of graphene oxide−silver nanocomposites on the membrane surface. 35Graphene oxide−silver modified membranes exhibited an 80% inactivation rate against 36attached Pseudomonas aeruginosa cells. In addition to a static antimicrobial assay, our study 37 also provides insights on the anti-biofouling property of forward osmosis membranes during 38 dynamic operation in a cross-flow test cell. Functionalization with graphene oxide−silver 39 nanocomposites resulted in a promising anti-biofouling property without sacrificing the 40 membrane intrinsic transport properties. Our results demonstrated that the use of graphene 41 oxide−silver nanocomposites is a feasible and attractive approach for the develop...

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“…Although the reason, thus far, remains unclear, both shifting and broadening are occasionally observed in functionalized or decorated GO. 29,30 This might be due to disruption in the initial layered organization of GO, which resulted in an increased interlayer distance between the sheets. Figure 3(a) plots the Auger spectroscopic data for GOZnO.…”

Section: 28mentioning

confidence: 99%

ZnO on Thiolated Graphene Oxide as Efficient Photocatalyst for Degradation of Methylene Blue

Kim¹,

Choi

2013

Bulletin of the Korean Chemical Society

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We present here an efficient and simple method for preparation of highly active heterogeneous ZnO photocatalyst (graphene oxide-zinc oxide: GO-ZnO), specifically by deposition of ZnO nanoparticles onto thiolated GOs. The resultant GO-ZnO sample was characterized by TEM, XRD, Auger, XPS, and Raman measurements, revealing that the size-similar and quasi-spherical ZnO nanoparticles were anchored to the thiolated GO surfaces. The average particle diameter was about 2.5 nm. In the photodegradation of methylene blue (MB) under ultraviolet (UV) light, GO-ZnO exhibited remarkably enhanced photocatalytic efficiency compared with thiolated GO and pure ZnO particles. This strong photocatalytic performance of GO-ZnO can be attributed to the suppression of electron recombination and the enhancement of mass transportation. The results showed that thiolated GO is the preferable supporting material.

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Targeted thiolation of graphene oxide and its utilization as precursor for graphene/silver nanoparticles composites

Cited by 75 publications

References 42 publications

Graphene nanoribbons inducing cube-shaped Ag nanoparticle assemblies

Graphene nanoribbons inducing cube-shaped Ag nanoparticle assemblies

Thin-film composite forward osmosis membranes functionalized with graphene oxide–silver nanocomposites for biofouling control

ZnO on Thiolated Graphene Oxide as Efficient Photocatalyst for Degradation of Methylene Blue

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