Composite of porous substrate and one-dimensional nanomaterial and method for preparing the same, surface-modified composite and method for preparing the same

Patent metadata

Field	Value
Publication number	US-9346079-B2
Application number	US-201514686158-A
Country	US
Kind code	B2
Filing date	Apr 14, 2015
Priority date	Aug 17, 2011
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

The present invention relates to a composite of a porous substrate and one-dimensional nanomaterial, which is manufactured by a hydrothermal method. The method for manufacturing the composite of the present invention is simple and low-cost, and the one-dimensional nanomaterial is homogeneously distributed on the porous substrate with tight binding at the interface. The present invention also relates to a surface-modified composite and a method for preparing the same. The composite of the present invention which is hydrophobically modified at the surface can adsorb organic solvents such as toluene, dichlorobenzene, petroleum ether and the like, and greases such as gasoline, lubricating oil, motor oil, crude oil and the like, with a weight adsorption ratio of >10.

First claim

We claim:

1. A method for manufacturing a composite of a porous substrate and a one-dimensional nanomaterial, wherein the porous substrate in the composite is a porous material having a porosity of 70% or above, and the porous material is selected from porous foamed metal, porous foamed plastics, alloy, organic substance or ceramics, and metallic skeleton with three-dimensional network of pores of 100 nm to 1 mm, the method comprising:
1) immersing the porous substrate in a catalytic seed solution, and sonicating for 1-180 min;
2) drying the soaked porous substrate obtained in step 1), and annealing at 200-500° C. for 1-180 min; and
3) immersing the substrate obtained in step 2) in a growth solution to obtain the composite of the porous substrate and the one-dimensional nanomaterial.

2. The method of claim 1 , wherein the one-dimensional nanomaterial is selected from zinc oxide, titanium oxide; zinc selenide, copper selenide, nickel selenide, cobalt selenide, iron selenide, manganese selenide, chromium selenide, vanadium selenide, titanium selenide, scandium selenide; copper sulfide, and zinc sulfide; zinc sulfate, copper sulfate, nickel sulfate, cobalt sulfate, iron sulfate, manganese sulfate, chromium sulfate, vanadium sulfate, titanium sulfate or scandium sulfate.

3. The method of claim 1 , wherein the one-dimensional nanomaterial has a diameter of 10-200 nm and a length of 500 nm to 5 μm; or a width of 500 nm to 20 μm and a thickness of 20-100 nm, and a length of 5-100 μm; and the one-dimensional nanomaterial in the composite is distributed on the porous substrate with a density of 10 8 -10 12 /cm 2 .

4. The method of claim 1 , wherein the porous substrate is porous foamed nickel.

5. The method of claim 1 , wherein the one-dimensional nanomaterial is zinc oxide, and the catalytic seed solution in step 1) is a solution of zinc acetate dissolved in absolute ethanol, and the concentration of zinc acetate is preferably 0.1-100×10 −3 mol/L.

6. The method of claim 1 , wherein the growth solution in step 3) is a mixed solution of urotropine, polyethanolamine and zinc nitrate hexahydrate dissolved in deionized water, wherein the concentrations of urotropine, polyethanolamine and zinc nitrate hexahydrate in the growth solution are 0.1-5 wt %, 0.1-10 wt %, and 0.1-2 wt %, respectively.

7. The method of claim 1 , wherein step 3) is carried out at growth temperature of 50-180° C. and reaction time of 6-48 h.

8. The method of claim 1 , wherein the obtained composite is a composite of a porous substrate and zinc oxide, and the method further comprises: immersing the composite of a porous substrate and zinc oxide in a solution of −2 valent selenide to form a composite of a porous substrate and zinc oxide and zinc selenide, and the composite of a porous substrate and zinc oxide and zinc selenide is immersed in a solution of +2 valent copper to form a composite of a porous substrate and zinc oxide and copper selenide.

9. The method of claim 1 , further comprising coating a layer of hydrophobic material on the composite of a porous substrate and a one-dimensional nanomaterial to carry out a surface modification.

10. The method of claim 9 , wherein the hydrophobic material silicone oil.

11. The method of claim 10 , wherein silicone oil is coat on the surface of the composite by gas phase deposition.

12. The method of claim 11 , wherein the gas phase deposition is carried out at 100-300° C. for 30-180 min.

13. The method of claim 9 , wherein the contact angle between the surface-modified composite and water is >150° and/or the surface-modified composite has a weight adsorption ratio of >10 to organic solvents or greases.

14. The method of claim 13 , wherein the organic solvents are selected from one or more of toluene, dichlorobenzene, gasoline and petroleum ether, and the greases are selected from one or more of lubricating oil, motor oil and crude oil.

Assignees

• Univ City Hong Kong

Inventors

• Lee Chunsing
• Lee Shuittong
• Tang Yongbing
• Fung Mankeung
• Chan Chiuyee

Classifications

• B01J20/0274

  characterised by the type of anion · CPC title

• C09K3/32

  for absorbing liquids to remove pollution, e.g. oil, gasoline, fat · CPC title

• B01J20/28007

  with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like (carbon nanostructures B01J20/205) · CPC title

• B01J20/0285

  Sulfides of compounds other than those provided for in B01J20/045 · CPC title

• B01J20/28004

  Sorbent size or size distribution, e.g. particle size · CPC title