simple hydrothermal synthesis of sphere-like tio2 nanoparticles and their functionalization with 1,4-butane sultone as a new heterogeneous catalyst

For the first time, anatase tio2 nanoparticles with high specific surface area have been synthesized by hydrothermal method using titanium (iv) ethoxide solution. nanocrystalline titania-based sulfonic acid (nano-tio2–bu–so3h (n-tbsa)) was successfully prepared by the reaction of nano-tio2 and 1,4-butane sultone. the samples were characterized using ft-ir, xrd, tga, edx, fesem, tem, bet and bjh analysis. the present catalytic system can be applied in multicomponent reaction for the synthesis of 1-amidoalkyl-2-naphthols and 1,8-dioxo-octahydro-xanthenes. the simple preparation, chemical stability, product selectivity and the recyclability of the catalyst make it eco-friendly and economical worthwhile.