Enhance photocatalytic hydrogen evolution by using alkaline pretreated corn stover as a sacrificial agent

In this study, alkali pretreated corn stover was added as a sacrificial agent to the suspension of Pt/TiO₂ to significantly enhanced photocatalytic hydrogen evolution. The changes in structural characteristics of corn stover before and after alkali treatment and photocatalytic reactions were studied. According to the results, the removal of lignin and hemicellulose, as well as the changes in surface morphology, structural components, and functional groups of alkali pretreated corn stover may affect the photocatalytic hydrogen production process. Next, the effects of NaOH concentration, pretreatment time and temperature on hydrogen production were also investigated. Among them, within the scope of the experimental conditions, the optimal hydrogen production is 25.84 μmol h⁻¹. Moreover, the enhancement of photocatalytic hydrogen production is also achieved by using the waste liquid of alkali pretreated. The output of this study may provide a reference for the reuse of alkali-treated biomass residues and waste liquor in some industries, and make more comprehensive, efficient and green use of native lignocellulosic biomass.