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796034

Sigma-Aldrich

Graphene oxide

powder, 15-20 sheets, 4-10% edge-oxidized, avg. no. of layers, 15 ‑ 20

Synonym(s):

graphite oxide

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About This Item

Linear Formula:
CxOyHz
UNSPSC Code:
12352103
PubChem Substance ID:
329768525
NACRES:
NA.23
Pricing and availability is not currently available.

Quality Level

100

form

powder

feature

avg. no. of layers 15 ‑ 20

solubility

water: dispersible (polar solvents)

bulk density

~1.8 g/cm3

SMILES string

O=C(O)C1C2=C3C4=C5C6=C7C8=C9C%10=C%11C(C%12=C%13C%10=C%14C8=C%15C6=C%16C4=C%17C2=CC(C(O)=O)C%18=C%17C%19=C%16C%20=C%15C%21=C%14C%22=C%13C(C%23=C%24C%22=C%25C%21=C%26C%20=C%27C%19=C%28C%18=CC(C(O)=O)C%29=C%28C%30=C%27C%31=C%26C%32=C%25C%33=C%24C(C%34=C%35C

InChI

1S/C140H42O20/c141-131(142)26-13-23-15-44-62(140(159)160)45-16-24-14-40-31(132(143)144)5-1-29-41-20-48(135(149)150)56-33-7-3-28-27-2-6-32-55-37(133(145)146)11-9-35-60(138(155)156)42-17-25-18-43-61(139(157)158)36-10-12-38(134(147)148)58-46-21-50(137(153)154)59-47-22-49(136(151)152)57-34-8-4-30-39(19-26)51(23)78-72(44)88-75(45)80-52(24)79(54(29)40)95-71(41)83(56)101-93-69(33)64(28)91-90-63(27)68(32)92-86(66(35)55)73(42)81-53(25)82-74(43)87(67(36)58)96-76(46)85(59)103-97-77(47)84(57)102-94-70(34)65(30)89(78)105-104(88)115-98(80)111(95)116(101)126-122-110(93)107(91)120-119-106(90)108(92)99(81)114-100(82)112(96)118(103)128(124(114)119)123-113(97)117(102)127(130(122)129(120)123)121(109(94)105)125(115)126/h2,5,7-10,12-22,26,38,48-50H,1,3-4,6,11H2,(H,141,142)(H,143,144)(H,145,146)(H,147,148)(H,149,150)(H,151,152)(H,153,154)(H,155,156)(H,157,158)(H,159,160)

InChI key

VTWITIAIMADGRM-UHFFFAOYSA-N

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General description

  • Form: Brown/Black powder
  • Bulk Density: ~1.8 g/cm3
  • Solubility: Dispersible in water and polar solvents
  • Number of layers: 15-20
  • Oxidation: 4-10%
The material basically consists of exfoliated graphene nanoplatelets containing functional organic groups. The oxygen content is less than 5%; the majority groups are hydroxyls (OH), which enables further chemical modifications to add new functionalities. The functionalization approach was designed to attach most of the groups on the border of the foils, aiming to preserve the intrinsic properties of graphene (e.g.: electric conductivity).

Application

The product is aimed for dispersion and/or incorporation in polar solvents (e.g.: water, THF and DMF) and polar polymeric matrices (e.g.: PLA, PA and PET). It is suitable for in situ polymerization, direct resin mixing and molding, solvent dissolution, extrusion processing after incorporation. Potential applications include:
  • Nanocomposites [1,2]
  • Anti-corrosion coatings [3,4]
  • Films with barrier properties [5,6]
  • Membranes for separation [7,8]
  • Conductive inks [9,10]
  • Energy storage [11,12]

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
0000351899
MKCW1866
MKCV8984
0000351899
0000270747

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Graphene oxide, ammonia functionalized 1 mg/mL, dispersion in H2O

Sigma-Aldrich

791520

Graphene oxide, ammonia functionalized

Beatriz Salesa et al.
Nanomaterials (Basel, Switzerland), 10(2) (2020-01-30)
Alginate-based materials hold great promise in bioengineering applications such as skin wound healing and scaffolds for tissue engineering. Nevertheless, cell adhesion of mammalian cells on these hydrophilic materials is very poor. In cases such as polycaprolactone, poly(hydroxy-3-butyrate-co-3-valerate) and gelatin, the
M M Abdel-Mottaleb et al.
Journal of the mechanical behavior of biomedical materials, 96, 118-124 (2019-04-30)
In this work, Polyacrylonitrile nanofibers were enhanced by graphene oxide and zinc oxide, in terms of enhanced the photocatalytic activity and mechanical properties for the composite nanofibers. Photocatalytic degradation of two organic dyes methylene blue dye and indigo carmine dye
Farzaneh Besharat et al.
Nanotechnology, 31(15), 155701-155701 (2019-12-21)
In recent years, in order to obtain improved mechanical, thermal, electrical and barrier/transport properties, aligned carbonaceous nanomaterials/polymer nanocomposite films have been receiving growing attention. Correspondingly, the edge oxidized graphene oxide (EOGO) nanoplatelets alignment influence on the structure of the polyethersulfone
Belén Frígols et al.
PloS one, 14(3), e0212819-e0212819 (2019-03-08)
Alginate is considered an exceptional biomaterial due to its hydrophilicity, biocompatibility, biodegradability, nontoxicity and low-cost in comparison with other biopolymers. We have recently demonstrated that the incorporation of 1% graphene oxide (GO) into alginate films crosslinked with Ca2+ cations provides
Transport properties of zigzag graphene nanoribbons with oxygen edge decoration
Zhang CX, et al.
Organic Electronics, 13(11), 2494- 2501 (2012)
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Questions

1–9 of 9 Questions  

  1. Can I get information about the interlayer distance of this product?

    1 answer

    1. This product is not tested for interlayer distance during the quality control process.

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  3. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  4. Could you provide TGA results of these GO? I need a high thermal stability GO like 300-400 stable.

    1 answer

    1. Unfortunately, thermogravimetric analysis (TGA) is not performed on this material. The decomposition temperature has not been established. Please see the link below to review an article which suggests that, in general, graphene oxide has a decomposition range by TGA from approximately 125 - 200°C.
      https://www.sciencedirect.com/science/article/pii/S2667056923000068#:~:text=Based%20on%20the%20TGA%20and,decomposition%20of%20GO's%20surface%20functionalities.

      Helpful?

  5. How can graphene oxide (P/N: 796034) be homogenized in a PBS solution?

    1 answer

    1. The product 796034 is edge functionalized graphene. One method to homogenize it is to use a regular lab ultrasonic bath. The appropriate sonication time depends on the machine power, typically around 15-20 minutes for a 100 Watts ultrasonic bath. If the dispersion is not as expected, the sonication process can be repeated.

      Another alternative is to use a homogenizer/cell crasher. A homogenizer with 400-600 Watts is recommended, and it's suggested to set the homogenizer to sonicate for 3 seconds and then pause for 1.5 or 2 seconds, with a total sonication time of 15-20 minutes. Similarly, if the powder is not fully dissolved, the experiment may be repeated.

      Helpful?

  6. What is the particle size of this product (796034, Graphene oxide)? Is it a nanoparticle?

    1 answer

    1. While particle size is not an assigned specification for this product, an estimate is provided below:
      d90 - 14.6 μm
      d50 - 4.2 μm
      d10 - 1.2 μm

      Helpful?

  7. May I get the step-by-step procedure including the materials used to synthesize this product graphene oxide (796034)?

    1 answer

    1. This is an MQ100 quality level product, this information is considered proprietary. All of the shareable documentation is on the product page or the documentation linked to on the product page. Synthetic and preparative details are proprietary.

      Helpful?

  8. Dear Sir/Madam, I am loohking for the thermophysical properties of Graphene Oxided product number 796034. Brand : Aldrich regards Adel

    1 answer

    1. Unfortunately the thermophysical properties have not been tested for this product.

      Helpful?

  9. Do you have data on the diffuse reflectance spectra of eo-GO (796034)?

    1 answer

    1. Unfortunately, reflectance spectra is not provided with this product.

      Helpful?

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