THI N FILM COMPOSITES HAV I NG GRAPHENE OXIDE QUANTUM DOTS

Miao Yu

Patent

Atlas literature

Patent

US 10,953,371

THI N FILM COMPOSITES HAV I NG GRAPHENE OXIDE QUANTUM DOTS

Miao Yu

Claims

Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.

5 independent · 15 dependent

1
Independentnitrogen-doped graphene oxide quantum dotsmembrane supportthin film composite membrane (TFCM)
A thin ﬁlm composite membrane (TFCM) comprising a substrate membrane having nitrogen-doped graphene oxide quantum dots (N-GOQDs), wherein the nitrogen-doped graphene oxide quantum dots are synthesized by carbonization of citric acid with ammonia through hydrothermal treatment and have a diameter ranging from about 3 nanometers to about 30 nanometers, and wherein the TFCM further comprises a membrane support, further wherein the N-GOQDs are applied to the TFCM in an aqueous solution, wherein the N-GO Q Ds are present in the aqueous solution in an amount ranging from greater than 0 wt./v. % to about 0.04 wt./v. %. Currently amended
1. 3
  Dependent← claim 1polysulfonethin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the membrane support includes polysulfone. Previously presented
2. 4
  Dependent← claim 1graphene oxide quantum dotsthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM includes graphene oxide quantum dots (GOQDs). Original
3. 5
  Dependent← claim 1polyamidethin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the substrate membrane includes a polyamide. Original
4. 6
  Dependent← claim 1zeolite particlesthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM further comprises zeolite particles. Original
5. 7
  Dependent← claim 1titanium oxide particlesthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM further comprises titanium oxide particles. Original
6. 8
  Dependent← claim 1sulfur oxide particlesthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM further comprises sulfur oxide particles. Original
7. 9
  Dependent← claim 1carbon nanotubesthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM further comprises carbon nanotubes. Original
8. 10
  Dependent← claim 1graphene oxide flakesthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM further comprises graphene oxide (GO) ﬂakes. Original
9. 11
  Dependent← claim 1reduced graphene oxidethin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM further comprises reduced graphene oxide (rGO). Original
10. 14
  Dependent← claim 1nitrogen-doped graphene oxide quantum dotsthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the N-GOQDs have a nitrogen to carbon (N/C) atomic ratio of from about 0.2 to about 0.6 as measured by X-ray photoelectron spectroscopy (X PS). Original
11. 15
  Dependent← claim 1nitrogen-doped graphene oxide quantum dotsthin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the N-GOQDs have an oxygen to carbon (O/C) atomic ratio of from about 0.7 to about 1.1 as measured by X-ray photoelectron spectroscopy (X PS). Original
12. 16
  Dependent← claim 1thin film composite membrane (TFCM)
  The TFCM of claim 1, wherein the TFCM has a thickness of from about 100 nm to about 400 nm and an Rms surface roughness of from about 60 nm to about 110 nm. Original
2
Independent
Canceled
13
Independent
Canceled
17
Independentnitrogen-doped graphene oxide quantum dotsthin film composite membrane (TFCM)
A method for producing thin ﬁlm composite membrane (TFCM) comprising applying nitrogen-doped graphene oxide quantum dots (N-GOQDs) to a substrate membrane using interfacial polymerization. Withdrawn
1. 18
  Dependent← claim 17nitrogen-doped graphene oxide quantum dotscitric acidNH₃
  The method of claim 17, wherein the N-GOQDs are fabricated by steps including mixing GOQDs with citric acid and ammonia, heating the citric acid and ammonia mixture, and ﬁltering the citric acid and ammonia mixture. Withdrawn
20
Independentnitrogen-doped graphene oxide quantum dotsthin film composite membrane (TFCM)
A method of desalination comprising passing saltwater through a thin ﬁlm composite membrane (TFCM) that includes a substrate membrane having nitrogen-doped graphene oxide quantum dots (N-GOQDs). Withdrawn

Worked examples

Embodiments described in the patent, grouped by the materials and process steps they use.

N-GOQD Synthesis

example section example

3 materials1 process step

N-GOQDs are produced by mixing GOQDs with citric acid and ammonia, heating the mixture (hydrothermal treatment), filtering (e.g., using a dialysis membrane), centrifuging, and collecting the supernatant. This yields N-GOQDs with diameters of approximately 3–30 nm.

TFCM Fabrication by Interfacial Polymerization

example section example

3 materials1 process step

N-GOQDs are applied to a polyamide substrate membrane supported on polysulfone via interfacial polymerization to form the thin film composite membrane. The N-GOQDs are present in an aqueous solution at concentrations up to about 0.04 wt./v.%.

Device structures

Layer stacks claimed or described, ordered top of device to substrate.

thin film composite membrane (TFCM)

nitrogen-doped graphene oxide quantum dotsactive layer additive

polyamidesubstrate membrane

polysulfonesupport

Materials

Materials described outside the worked examples.

membrane support

Membrane Support

graphene oxide quantum dots

Membrane Additive

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
N/C Atomic Ratio XPS	0.2–0.6 dimensionless	nitrogen-doped graphene oxide quantum dots
O/C Atomic Ratio XPS	0.7–1.1 dimensionless

Why these are connected

Related documents with shared materials, methods, properties, or citations.

THI N FILM COMPOSITES HAV I NG GRAPHENE OXIDE QUANTUM DOTS | Matter42 Literature