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

Abstract

Summary 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.

Solar-driven reforming of solid waste for a sustainable future

“…substrate concentration, reactor volume, irradiation type). 40 The majority of subsequent PR studies have also used TiO2|Pt photocatalysts to photoreform alfalfa, 41 bamboo, 39 corn stover, 42 grass, 38,39,43 paper, 34 rice, 39,41 wood, 35,37 swine sewage, 44 and olive mill, 45 brewery 46 and dairy 46 wastewaters (see Tables S2- S6 for a literature survey). Despite the prevalence of TiO2, the efficiency and up-scalability of this photocatalyst are limited by its ultraviolet-only absorption (~4% of the solar spectrum) and need for expensive H2 evolution co-catalysts (usually Pt).…”

Tailor‐Engineered 2D Cocatalysts: Harnessing Electron–Hole Redox Center of 2D g‐C3N4 Photocatalysts toward Solar‐to‐Chemical Conversion and Environmental Purification

“…employed a facile one‐pot calcination method to prepare WS 2 /g‐C 3 N 4 nanosheet hybrid (Figure 9j). [ 249 ] The fabricated composite showed good hydrogen production rate of 154 µmol h –1 g –1 , which was 34 times higher than pristine g‐C 3 N 4 .…”

Reuse of Acid‐treated Waste Corn Straw for Photocatalytic Hydrogen Production

“…A procedure in a reported study [43] was used to implement the photocatalytic hydrogen generation experiments in an evacuation system (Lab Solar‐III, Perfect Light Co., Ltd.). The catalyst, sacrificial agent, and 100 mL of deionized water were added to a quartz reactor and kept stirring.…”