Hollow crystalline silicate particles

Among various crystalline silica/silicate materials, zeolites provide some unique features as the shell of hollow particles high thermal stability, microporosity. 

Hollow particles of crystalline layered silicate have also been reported. Hollow spheres consisting of nanosheets of nickel silicate (NiSiOs) can be formed using silica sphere templates. When Stober silica spheres (500 nm) were treated with a mixture of NiS04 and NHs a nickel silicate shell was formed on the surfece. 

Hollow spheres of Ti02 can be prepared by sol-gel reactions within ordered arrays of monodispersed PS particles as template [63]. After removal of the PS 

Katagiri et al. reported the preparation of hollow Ti02 microspheres by layer-by-layer assembly of TALH and positively charged polyelectrolytes on colloidal silica templates [65]. Hydrothermal treatment of the Ti02-coated particles led to 

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