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4. Conclusions This work shows that the morphology of hierarchical boehmite structures formed in aqueous solutions of aluminum salts and urea can be controlled by adjusting the sulfate concentration. The morphology of these structures evolves with increasingKAl(SO4)2 3 12H2O concentration from nanoflakes, nanoflakes assemblies, and flower-like structures to hollow microspheres. Although the effect of sulfate concentration was systematically studied for KAl(SO4)2 12H2O, the well-dispersed boehmite and magnesia-incorporated boehmite hollow microspheres were also obtained whenappropriate amounts of other sulfates such as AlNH4(SO4)2 312H2O, Al2(SO4)3 3 18H2O, Na2SO4, (NH4)2SO4, and MgSO4 37H2O were used in the aqueous phase of aluminumnitrate and urea. Thus, this new general strategy seems to be applicable for the synthesis of hierarchical boehmite structures and related materials with controlled morphology and enlarged surface area for various applications such as catalysis, adsorption, and separation. |
榮譽版主 (知名作家)
笑熬漿糊——滿腦漿糊
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4. 結論 這項工作表明,可以通過調整硫酸濃度控制鋁鹽和尿素水溶液中形成的水軟鋁石分層結構的形態(tài)。這些結構形態(tài)的生成與長大成KAL(SO4)32 312 H2O納米片,納米片組件的密度,呈空心球花狀結構。雖然對KAL(SO4)212H2O硫酸濃度的影響進行了系統(tǒng)研究,并以及分散的水軟鋁石和鎂納入水軟鋁石空心微球的方法獲得了適當數(shù)量的其他硫酸鹽,如:lNH4(SO4)2312H2O,AL2(SO4使用硝酸鋁和尿素水相)318H2O,硫酸鈉,硫酸銨和MgSO437H2O。因此,這一新的總體戰(zhàn)略似乎適用于合成水軟鋁石分層結構和控制各種應用,如催化,吸附,分離的形態(tài)和擴大表面積的相關材料等。 機器翻譯,你看懂就行! |

至尊木蟲 (職業(yè)作家)
金蟲 (正式寫手)
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結論: 本次操作表明在鋁鹽和尿素溶液中形成的層次水軟鋁石結構可以通過改變溶液中硫酸鹽的濃度來改變其形態(tài)。隨著KAl(SO4)2 3 12H2O的濃度逐漸增加,先后形成納米片,納米片組織,花狀組織,然后形成中空的微球體。雖然對于加入KAl(SO4)2 3 12H2O的硫酸鹽濃度做了系統(tǒng)的研究,但是當適當分量的其他硫酸鹽類如AlNH4(SO4)2 312H2O, Al2(SO4)3 3 18H2O, Na2SO4, (NH4)2SO4, and MgSO4 37H2O加入在硫酸鋁和尿素的溶液中時也同樣可以得到充分擴散的水軟鋁石中空微球體和攙有氧化鎂的中空微球體,因此這個新的辦法似乎可以用來合成層次水鋁石結構和相關的物質,在催化,合成和分離 過程中控制其形態(tài)并增大接觸面積。 非專業(yè)人士,僅供參考! |
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