Synergistic photocatalysis of a hydrochar/CeO composite for dye degradation under visible light.

The synthesis and characterization of a hydrochar/CeO composite along with its evaluation in methylene blue degradation under visible light are presented. The methodology consisted of a single-pass hydrothermal method, having as synthesis conditions 9 h of reaction time, 210 °C, autogenous pressure, and a biomass/CeO ratio of 100:1. The composite characterization revealed good dispersion of CeO in the carbonaceous matrix and significant synergy in the composite activation using visible irradiation.

Hydrothermal synthesis of a photocatalyst based on Byrsonima crassifolia and TiO for degradation of crystal violet by UV and visible radiation.

This work presents a one-step synthesis methodology for preparing a hydrochar (HC) doped with TiO (HC-TiO) for its application on the degradation of crystal violet (CV) using UV and visible radiation. Byrsonima crassifolia stones were used as precursors along with TiO particles. The HC-TiO sample was synthesized at 210 °C for 9 h using autogenous pressure.

Pyrolysis Kinetics of Stone as Agro-Industrial Waste through Isoconversional Models.

This study is aimed at the analysis of the pyrolysis kinetics of Nanche stone BSC ( as an agro-industrial waste using non-isothermal thermogravimetric experiments by determination of triplet kinetics; apparent activation energy, pre-exponential factor, and reaction model, as well as thermodynamic parameters to gather the required fundamental information for the design, construction, and operation of a pilot-scale reactor for the pyrolysis this lignocellulosic residue. Results indicate a biomass of low moisture and ash content and a high volatile matter content (≥70%), making BCS a potential candidate for obtaining various bioenergy products. Average apparent activation energies obtained from different methods (KAS, FWO and SK) were consistent in value (~123.