Nanocomposite particle and process of preparing the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-023/00
B01J-021/00
B01J-020/00
B01J-029/00
B01J-037/00
출원번호
UP-0509339
(2006-08-24)
등록번호
US-7820583
(2010-11-15)
발명자
/ 주소
Fu, Guoyi
Augustine, Steven M.
출원인 / 주소
Millennium Inorganic Chemicals, Inc.
대리인 / 주소
Dunlap Codding, P.C.
인용정보
피인용 횟수 :
9인용 특허 :
13
초록▼
A nanocomposite particle, its use as a catalyst, and a method of making it are disclosed. The nanocomposite particle comprises titanium dioxide nanoparticles, metal oxide nanoparticles, and a surface stabilizer. The metal oxide nanoparticles are formed hydrothermally in the presence of the titanium
A nanocomposite particle, its use as a catalyst, and a method of making it are disclosed. The nanocomposite particle comprises titanium dioxide nanoparticles, metal oxide nanoparticles, and a surface stabilizer. The metal oxide nanoparticles are formed hydrothermally in the presence of the titanium dioxide nanoparticles. The nanocomposite particle is an effective catalyst support, particularly for DeNOx catalyst applications.
대표청구항▼
We claim: 1. A nanocomposite particle comprising: (a) titanium dioxide nanoparticles, wherein the titanium dioxide nanoparticles have an average size of less than about 50 nm and a surface area of greater than or equal to about 20 m2/g; (b) metal oxide nanoparticles selected from the group consisti
We claim: 1. A nanocomposite particle comprising: (a) titanium dioxide nanoparticles, wherein the titanium dioxide nanoparticles have an average size of less than about 50 nm and a surface area of greater than or equal to about 20 m2/g; (b) metal oxide nanoparticles selected from the group consisting of zirconium dioxide, cerium dioxide, tin oxide, niobium oxide and mixtures and combinations thereof, wherein the metal oxide nanoparticles have an average size of less than about 50 nm; and (c) a surface stabilizer selected from the group consisting of silicon dioxide, aluminum oxide, phosphorus pentoxide, aluminum silicate and aluminum phosphate, wherein the metal oxide nanoparticles are formed by hydrothermally treating an amorphous hydrated metal oxide in the presence of the titanium dioxide nanoparticles, and wherein the nanocomposite particle has an average pore volume between the titanium dioxide nanoparticles and the metal oxide nanoparticles of greater than about 0.3 cm3/g. 2. The nanocomposite particle of claim 1 wherein the titanium dioxide nanoparticles are predominantly anatase. 3. The nanocomposite particle of claim 1 wherein the metal oxide nanoparticles are zirconium dioxide. 4. The nanocomposite particle of claim 1 comprising 50 to 95 weight percent titanium dioxide nanoparticles, 2 to 48 weight percent metal oxide nanoparticles, and 2 to 20 weight percent surface stabilizer. 5. The nanocomposite particle of claim 1 having a surface area greater than 60 m2/g after being calcined at 800° C. for 6 hours. 6. The nanocomposite particle of claim 1, wherein the average pore volume between the titanium dioxide nanoparticles and the metal oxide nanoparticles is in a range of from about 0.3 cm3/g to about 0.8 cm3/g. 7. A catalyst comprising the nanocomposite particle of claim 1 and at least one metal component comprising a metal selected from the group consisting of platinum, gold, silver, palladium, copper, tungsten, molybdenum, vanadium, iron, rhodium, nickel, manganese, chromium, cobalt, and ruthenium. 8. The catalyst of claim 7 wherein the metal component is selected from the group consisting of tungsten trioxide and vanadium pentoxide. 9. The catalyst of claim 8 comprising 0.1 to 10 weight percent vanadium pentoxide and 4 to 20 weight percent tungsten trioxide.
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