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In this study, BaO nanoflower-like was prepared by using a template, and identified using a variety of techniques. The sample was characterized by XRD measurements, scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS) and energy dispersive X-ray spectroscopy (EDX). The catalytic activity of BaO system in the acetylation of alcohols was studied. The formation of products proceeds on the catalysts with predominantly strong basic sites. This catalyst is inexpensive and easy to handle, and the acetylation of hydroxyl groups using this catalyst only required a low loading of the catalyst. The catalytic degradation of doxycycline (DOXY) has been investigated in aqueous phase using MgO and BaO nanostructures.