Multilayer organic-templated-boehmite-nanoarchitecture for water purification
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-020/32
B01J-020/28
B01J-020/30
C02F-001/28
B82Y-030/00
C02F-101/10
C02F-101/14
C02F-103/06
출원번호
US-0360449
(2012-11-20)
등록번호
US-10035131
(2018-07-31)
우선권정보
IN-4062/CHE/2011 (2011-11-24)
국제출원번호
PCT/IB2012/002885
(2012-11-20)
국제공개번호
WO2013/076581
(2013-05-30)
발명자
/ 주소
Pradeep, Thalappil
Annamalai, Leelavathi
Sankar, Mohan Udhaya
Chaudhary, Amrita
Anshup, n/a
출원인 / 주소
Indian Institute of Technology
대리인 / 주소
Ballard Spahr LLP
인용정보
피인용 횟수 :
0인용 특허 :
35
초록▼
An adsorbent composition comprising a nanoscale shell of metal oxide or hydroxide on an organic-templated-boehmite-nanoarchitecture (OTBN) is provided. The nanoscale shell is prepared by impregnating OTBN with a metal or a non-metal ion, followed by in-situ hydrolysis of the deposited ion on the OTB
An adsorbent composition comprising a nanoscale shell of metal oxide or hydroxide on an organic-templated-boehmite-nanoarchitecture (OTBN) is provided. The nanoscale shell is prepared by impregnating OTBN with a metal or a non-metal ion, followed by in-situ hydrolysis of the deposited ion on the OTBN surface. The thickness of the shell is less than about 3 nm, which is less than the size of OTBN core. The number of layers of the shell is flexible, thereby leading to a multi-layer nanoscale hybrid composition. The adsorbent composition is capable of removing inorganic anions such as fluoride from water, with an increased adsorption capacity.
대표청구항▼
1. A method for preparing an adsorbent composition, the method comprising: forming a nanoscale layer of at least one of a metal oxyhydroxide, a metal hydroxide, and a metal oxide on an organic-templated-boehmite-nanoarchitecture (OTBN), wherein the at least one metal oxyhydroxide, metal hydroxide, o
1. A method for preparing an adsorbent composition, the method comprising: forming a nanoscale layer of at least one of a metal oxyhydroxide, a metal hydroxide, and a metal oxide on an organic-templated-boehmite-nanoarchitecture (OTBN), wherein the at least one metal oxyhydroxide, metal hydroxide, or metal oxide forms a shell on the OTBN, and wherein a particle size of the nanoscale layer is less than about 3 nanometers, whereby the adsorbent composition is used for removal of a fluoride from drinking water. 2. The method of claim 1 further comprising hydrolyzing a metal precursor by using an alkaline medium. 3. The method of claim 2, wherein the metal precursor comprises at least one of a salt of aluminum, iron, titanium, manganese, cobalt, nickel, copper, silver, zinc, lanthanum, cerium, zirconium, calcium, magnesium, barium, and combinations thereof. 4. The method of claim 2, wherein the metal precursor comprises aluminum sulfate. 5. The method of claim 2, wherein the metal precursor comprises at least one of aluminum nitrate, aluminum chloride, aluminum isopropoxide, aluminum acetate, and combinations thereof. 6. The method of claim 2, wherein the step of forming the nanoscale layer comprises: contacting the metal precursor with OTBN, whereby a metal ion-OTBN complex is formed; andcontacting the metal ion-OTBN complex with a base, whereby the nanoscale layer of at least one of the metal oxyhydroxide, the metal hydroxide, and the metal oxide on the OTBN is formed. 7. The method of claim 6 further comprising filtering and washing a precipitate formed with water. 8. The method of claim 7 further comprising drying the filtered and washed precipitate to remove moisture content, wherein drying is performed at temperatures below about 60° C., whereby a first material is formed. 9. The method of claim 8, wherein the drying includes at least one of air drying and sun drying. 10. The method of claim 8 further comprising grinding the first material, whereby particles in granular form are formed. 11. The method of claim 6, wherein the base comprises at least one of sodium hydroxide, potassium hydroxide, ammonia, and combinations thereof. 12. The method of claim 1, wherein the adsorbent composition is used for removal of at least one of a fluoride and an arsenic from the drinking water having a fluoride adsorption capacity in greater than about 100 mg/g at an initial fluoride concentration of about 10 mg/L. 13. The method of claim 1, wherein the OTBN is in form of a homogeneous aqueous dispersion, water-insoluble granules suspended in aqueous medium, and combinations thereof. 14. The method of claim 1, wherein a thickness of the nanoscale layer is in the range of about 1 nm to about 10 nm. 15. The method of claim 1 further comprising hydrolyzing a non-metal precursor by using an alkaline medium in presence of the OTBN. 16. The method of claim 15, wherein the non-metal precursor comprises at least one of a salt of silicon, germanium, tellurium, gallium, indium, and combinations thereof. 17. The method of claim 1 further comprising hydrolyzing an acid soluble biopolymer by using an alkaline medium in presence of the OTBN. 18. The method of claim 17, wherein the acid soluble biopolymer comprises at least one of chitosan, nylon, and combinations thereof. 19. The method of claim 1, wherein the adsorbent composition is used in form of at least one of a candle, a molded porous block, a filter bed, a column, a packet, a sachet and a bag.
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