Facile Synthesis of Monodisperse Hollow Mesoporous Organosilica/Silica Nanospheres by an in Situ Dissolution and Reassembly Approach

ACS Applied Materials & Interfaces
Xiaodan SuZhaogang Teng

Abstract

Hollow structured mesoporous organosilicas are a research hotspot because of their molecularly organic-inorganic hybrid frameworks, large void spaces, permeable shells, high surface areas, uniform pores, and various applications. However, the previous reported hard-core templating method and liquid-interface assembly approach suffered from complex preparation procedures and poor uniformity for the products. In this work, we demonstrate an in situ dissolution and reassembly method to synthesize monodisperse benzene-bridged hollow mesoporous organosilica/silica nanoparticles (HMOSNs) by sequential addition of tetraethoxysilane (TEOS) and 1,4-bis(triethoxysilyl)benzene in a solution containing a cetyltrimethylammonium bromide (CTAB) surfactant. The formation of HMOSNs is completed in one pot, which is very effective and convenient. The formation mechanism of HMOSNs is ascribed to the fact that TEOS first assembles with CTAB to form mesostructured silica cores, which further dissolve and migrate to the outer layers during the deposition of mesostructured organosilica shells. The prepared benzene-bridged HMOSNs possess uniform diameter (140 nm), large pore volume (2.79 m3/g), high specific surface area (2926 m2/g), and a high doxoru...Continue Reading

References

May 11, 2006·Journal of the American Chemical Society·H DjojoputroG Q Lu
Apr 25, 2015·Journal of the American Chemical Society·Xiaomin LiDongyuan Zhao
May 9, 2016·Journal of Colloid and Interface Science·Xiaobo MaZhaogang Teng
Dec 28, 2017·Journal of the American Chemical Society·Zhaogang TengGuangming Lu
Jul 17, 2018·Advanced Materials·Le YuXiong Wen David Lou
Oct 5, 2018·Advanced Materials·Zhaogang TengDongyuan Zhao

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