Biotemplated perovskite nanomaterials

Patent metadata

Field	Value
Publication number	US-10456774-B2
Application number	US-201715630727-A
Country	US
Kind code	B2
Filing date	Jun 22, 2017
Priority date	Apr 10, 2012
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A biotemplated nanomaterial can include a crystalline perovskite.

First claim

What is claimed is:

1. A method of making a perovskite nanomaterial comprising:
combining an aqueous solution of a biotemplate having affinity for a metal ion and an inorganic precursor of a perovskite material to form an aqueous mixture, and
reacting the inorganic precursor and the biotemplate to form the perovskite nanomaterial,
wherein the perovskite comprises strontium titanate, or bismuth ferrite.

2. The method of claim 1 , wherein the biotemplate includes a virus particle.

3. The method of claim 2 , wherein the virus particle is an M13 bacteriophage.

4. The method of claim 1 , wherein the inorganic precursor comprises a first inorganic ion and a second inorganic ion.

5. The method of claim 4 , further comprising forming an ion source including the first inorganic ion and the second inorganic ion before forming the aqueous mixture.

6. The method of claim 4 , further comprising adjusting the pH of the aqueous mixture and incubating the aqueous mixture for a predetermined time at a predetermined temperature.

7. The method of claim 4 , further comprising incubating the aqueous mixture and then calcining the reaction products.

8. A method of making a perovskite nanomaterial comprising:
combining an aqueous solution of a biotemplate having affinity for a metal ion and an inorganic precursor of a perovskite material to form an aqueous mixture, and
reacting the inorganic precursor and the biotemplate to form the perovskite nanomaterial,
wherein the perovskite has the formula (I):
A x A′ 1-x B y B′ 1-y O 3±δ   (I)

wherein
each of A and A′, independently, are selected from the group consisting of Mg, Pb, and Bi;
each of B and B′, independently, are selected from the group consisting of Zr, V, Nb, Mn, Fe, Ru, Rh, Ni, Pd, Pt, Al, and Mg;
x is in the range of 0 to 1;
y is in the range of 0 to 1; and
δ is in the range of 0 to 1.

9. The method of claim 8 , wherein the perovskite is a bismuth ferrite.

10. The method of claim 8 , wherein the perovskite is heated to at least 600° C.

11. The method of claim 8 , wherein the post-treated nanomaterials are solar active.

12. The method of claim 8 , wherein the inorganic precursor comprises a first inorganic ion and a second inorganic ion.

Assignees

• Massachusetts Inst Technology

Inventors

• Nuraje Nurxat
• Belcher Angela M
• Lei Yu

Classifications

• C01B3/042

  Decomposition of water (by electrolysis of water C25B1/04) · CPC title

• C30B29/24

  with formula AMeO3, wherein A is a rare earth metal and Me is Fe, Ga, Sc, Cr, Co or Al, e.g. ortho ferrites · CPC title

• C30B7/14

  the crystallising materials being formed by chemical reactions in the solution · CPC title

• B01J23/002

  Mixed oxides other than spinels, e.g. perovskite · CPC title

• C30B29/30

  Niobates; Vanadates; Tantalates · CPC title