Stöber silica particles as basis for redox modifications: Particle shape, size, polydispersity, and porosity

► Silica nanoparticles of various diameters are prepared and characterized. ► The Stöber sol-gel process is optimized for desired particle properties. ► High water concentrations and calcination result in nonporous particles. ► Low polydispersity results under conditions where T has a weak effect on diameter. ► Surface area analysis confirms sphericity, nonporosity and low polydispersity.