Synthesis of micrometer-sized hard silica spheres with uniform mesopore size and textural pores.
Micrometer-sized silica spheres were prepared using a new pH-induced rapid colloid aggregation method in water-in-oil (W/O) emulsion separately with F127 and the mixture of Pluronic triblock copolymer (F127, P123, or P105) and PEG20000 as templates. All the mesoporous silica spheres exhibited high surface areas (657-1145 m2/g) and large pore volumes (0.46-2.16 ml/g). Through optimizing the synthetic conditions, hard silica spheres with narrow particle size distribution, uniform pore size, and textural pores were obtained. Finally, the mechanism of this synthetic route is discussed.
Yang
L M
LM
State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
Wang
Y J
YJ
Sun
Y W
YW
Luo
G S
GS
Dai
Y Y
YY
D003102:Colloids; D004655:Emulsions; D006851:Hydrochloric Acid; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008832:Microchemistry / Q000379:methods; D008855:Microscopy, Electron, Scanning; D008958:Models, Molecular; D020442:Poloxamer; D011092:Polyethylene Glycols; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D014867:Water
D003102:Colloids; D004655:Emulsions; D014867:Water; D020442:Poloxamer; D011092:Polyethylene Glycols; D012822:Silicon Dioxide; D006851:Hydrochloric Acid