Multifunctional materials and composites
Forming multifunctional materials and composites thereof includes contacting a first material having a plurality of oxygen-containing functional groups with a chalcogenide compound, and initiating a chemical reaction between the first material and the chalcogenide compound, thereby replacing oxygen in some of the oxygen-containing functional groups with chalcogen from the chalcogen-containing compound to yield a second material having chalcogen-containing functional groups and oxygen-containing functional groups. The first material is a carbonaceous material or a macromolecular material. A product including the second material is collected and may be processed further to yield a modified product or a composite.
1. A method of making a multifunctional composite, the method comprising:
contacting graphene oxide with a chalcogenide compound, wherein the chalcogen is sulfur; and
reacting the graphene oxide and the chalcogenide compound at a temperature between 120° C. and 180° C. to yield a product comprising chalcogen-containing functional groups and oxygen-containing functional groups, wherein a majority of the chalcogen-containing functional groups are thiol groups, and
wherein the chalcogenide compound is a solid or a liquid with a boiling point greater than 50° C. at 100 kPa comprising
at least one element selected from Groups 1, 2, and 13-16 in the periodic table,
wherein at least one sulfur in the chalcogenide compound is not bonded to oxygen or hydrogen.
2. The method of claim 1 , wherein the oxygen-containing functional groups of the graphene oxide comprise hydroxyl groups, alkoxide groups, or a combination thereof.
3. The method of claim 1 , wherein the oxygen-containing functional groups of the graphene oxide are selected from the group consisting of hydroxyl groups and alkoxide groups.
4. The method of claim 1 , wherein the graphene oxide is porous.
5. The method of claim 1 , wherein contacting the graphene oxide with the chalcogenide compound comprises forming the chalcogenide compound in situ in the presence of the graphene oxide.
6. The method of claim 1 , wherein the at least one element selected from Groups 1, 2, and 13-16 in the periodic table is not carbon.
7. The method of claim 1 , wherein the chalcogenide compound comprises boron.
8. The method of claim 1 , wherein the chalcogenide compound comprises phosphorus.
9. The method of claim 1 , wherein contacting the graphene oxide with the chalcogenide compound comprises combining the graphene oxide and the chalcogenide compound in an inorganic medium or an organic solvent.
10. The method of claim 1 , wherein contacting the graphene oxide with the chalcogenide compound comprises forming a mixture comprising the graphene oxide and the chalcogenide compound, and reacting the graphene oxide and the chalcogenide compound in an autoclave.
11. The method of claim 1 , wherein contacting the graphene oxide with the chalcogenide compound comprises forming a mixture comprising the graphene oxide and the chalcogenide compound, and reacting the graphene oxide and the chalcogenide compound in a container whose atmosphere is not directly in contact with air.
12. The method of claim 1 , wherein contacting the graphene oxide with the chalcogenide compound comprises forming a mixture comprising the graphene oxide and the chalcogenide compound, and reacting the graphene oxide and the chalcogenide under a reduced pressure, in an inert gas environment, or both.
13. A multifunctional composite formed by a process comprising:
contacting graphene oxide with a chalcogenide compound, wherein the chalcogen is sulfur; and
reacting the graphene oxide and the chalcogenide compound at a temperature between 120° C. and 180° C. to yield a product comprising chalcogen-containing functional groups and oxygen-containing functional groups, wherein a majority of the chalcogen-containing functional groups are thiol groups, and
wherein the chalcogenide compound is a solid or a liquid with a boiling point greater than 50° C. at 100 kPa comprising
at least one element selected from Groups 1, 2, and 13-16 in the periodic table,
wherein at least one sulfur in the chalcogenide compound is not bonded to oxygen or hydrogen.
14. The product of claim 13 , wherein the product is in the form of a coating, a film, a monolith, a powder, or a dispersion.
15. The product of claim 13 , wherein the product is electrically conductive, thermally conductive, or both.
16. The product of claim 13 , wherein the product is optically transparent or translucent.
17. The product of claim 13 , wherein the product is porous or nanoporous.
18. A material comprising the product of claim 13 deposited on the surface of the material.
19. The product of claim 13 , wherein the chalcogenide compound comprises P 2 S 5 .
20. The product of claim 13 , wherein the chalcogenide compound comprises P 4 S 10 .
21. The product of claim 13 , wherein the chacogenide compound comprises a complex of P 4 S 10 and pyridine.
22. The product of claim 21 , wherein the complex of P 4 S 10 and pyridine is formed in situ.
23. The product of claim 13 , wherein a ratio of sulfur atoms to oxygen atoms in the product is in a range of about 0.5 to about 1.
24. The product of claim 13 , wherein a ratio of sulfur atoms to oxygen atoms in the product is in a range of about 1 to about 4.
25. The product of claim 13 , wherein a ratio of carbon atoms to sulfur atoms in the product is in a range of about 5 to about 30.
26. The product of claim 25 , wherein a ratio of carbon atoms to sulfur atoms in the product is in a range of about 5 to about 15.
27. The product of claim 13 , wherein a ratio of carbon atoms to oxygen atoms in the product is in a range of about 10 to about 20.