Anionic surfactant-templated mesoporous silica (AMS) nano-spheres with radially oriented mesopores.
Mesoporous silica nano-spheres with pore size larger than 3 nm were synthesized using an anionic surfactant as the template. These nano-spheres possess centrosymmetric radial mesopores (emanating from the spherical center to the exterior surface) and form stable suspension. The spherical size and mesostructure can be finely tuned by changing the pH value of the synthetic system in the range of 8.8 to 6.4. In addition, when the pH value was decreased to 5.8, instead of spheres, anisotropic morphologies such as elliptical, peanutlike and trifurcate particles were obtained, exhibiting core/shell structure due to the different orientations of the mesopores in the core and the shell of the particles. It is proposed that the evolution of the morphologies and mesostructures of the products templated by anionic surfactants strongly depend on the pH value of the synthetic system.
Wang
Jin-Gui
JG
Institute of New Catalytic Materials Science, Key Laboratory of Energy-Material Chemistry (Tianjin) and Engineering Research Center of Energy Storage & Conversion (MOE), College of Chemistry, Nankai University, Tianjin 300071, PR China.
Xiao
Qiang
Q
Zhou
Hui-Jing
HJ
Sun
Ping-Chuan
PC
Ding
Da-Tong
DT
Chen
Tie-Hong
TH