Indexed on: 20 Dec '18Published on: 20 Dec '18Published in: Royal Society open science
Developing high-efficiency hetero-catalysts for transesterification reaction is of great importance in the production of biodiesel from L. seed oil (JO). Here, we synthesized a series of sulfated TiO by treating with varying HSO concentration (SO/TiO) and TiO catalysts and applied to the transesterification of JO. Furthermore, these heterostructures were characterized by many characterization methods including XRD, FT-IR, N-adsorption, SEM, TEM, TG, py-IR and NH-TPD, and their catalytic performance was investigated under various operating conditions. The results reveal that both the Brønsted and Lewis acid sites are presented in the SO/TiO catalysts, while only Lewis-type sites are observed in the TiO catalyst. And the acid intensity, surface area and mesoporous volume of catalysts are improved obviously after treating TiO with sulfuric acid. Then the SO/TiO catalysts exhibit much higher catalytic activity than TiO catalyst, which is attributed to the larger surface area and mesoporous volume and stronger acidity. Furthermore, the reusability behaviour of 1.5 SO/TiO catalyst in the transesterification of JO was also studied.