发明名称 |
SILICEOUS MATERIALS HAVING TUNABLE POROSITY AND SURFACE MORPHOLOGY AND METHODS OF SYNTHESIZING SAME |
摘要 |
Non-spherical siliceous particles having a plurality of porous branches are disclosed and claimed. The porous branches are randomly oriented and elongated, ring-like, and/or aggregated. An additive introduced during synthesis of the particles modifies pore volume and morphology. The tunability of the pore volume includes an inner diameter ranging from about 2 to about 50,000. Synthesizing the particles includes mixing under constant or intermittent stirring in a reaction vessel an aqueous silicic acid solution with an acidic heel solution to form a mixture. The stirring may optionally be performed at a variable speed. An additive is introduced into the mixture at a controlled rate, wherein the additive imposes a pH change from a lower pH to a higher pH to the mixture to induce siliceous particle precipitation. Optionally, a metal dopand may be introduced into the particles and/or at least a portion of an outer surface located outside of the pores and/or an inner surface located inside of the pores may be modified. |
申请公布号 |
WO2010030878(A2) |
申请公布日期 |
2010.03.18 |
申请号 |
WO2009US56659 |
申请日期 |
2009.09.11 |
申请人 |
NALCO COMPANY;HOLLAND, BRIAN T.;WELZ, SASCHA |
发明人 |
HOLLAND, BRIAN T.;WELZ, SASCHA |
分类号 |
C01B33/00;C01B33/12 |
主分类号 |
C01B33/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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