One‐step electrospinning of alumina nanofibers to create a competitive esterification catalyst

Abstract Alumina nanofibers prepared by electrospinning without polymer additives are presented as a catalyst material for esterification reactions. An optimal synthesis recipe has been determined based on an Al‐alkoxide precursor (aluminum di(sec‐butoxide) acetoacetic ester chelate [ASB]). By using an initial molar composition of 1:3:0.2:0.8 for ASB:ethanol:hydrochloric acid:distilled water, and maintaining a dynamic viscosity between 50 and 150 mPa s, homogeneous alumina nanofibers with excellent thermal resistance are produced. The acidity, as an indicator of catalytic potential, was evaluated using NH 3 temperature‐programmed desorption and compared with alternative catalysts of similar chemical nature, including cast alumina, γ‐alumina, and HZSM‐5. Testing of the alumina fibers as a catalyst in an esterification reaction (conversion of n‐pentanol and acetic acid into pentyl acetate) showed catalytic activity with higher conversion than the commercial alternatives. In addition, the reusability of the material was confirmed, thereby highlighting its potential as a highly efficient catalyst.