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Modifications of TiO_2 in photocatalytic hydrogen production have been widely studied to resolve its limitations in harnessing visible light and electron-hole recombination. Among them is by the combi...nation of Graphene and Fe dopant. This study examines the effects of various concentrations of Fe on Fe-Graphene/TiO_2 and various polyalcohols as sacrificial agents for H_2 production. Graphene/TiO_2 and Fe-Graphene/TiO_2 were synthesized by a wet-impregnation method. Characterizations were applied on TiO_2 P25, Graphene/TiO_2, and Fe-Graphene/TiO_2, using XRD, SEM-EDX, UV-Vis DRS, and FTIR techniques to analyze the properties of the catalysts. H_2 production experiment was carried out for 5 h in a reactor that enables internal illumination, equipped with a 20W UV lamp, burette, and cooling water. GC analysis of gas sample on the burette confirmed the formation of hydrogen. The accumulation of H_2 products indicated that 0.2% Fe on Fe-Graphene/TiO_2 with a bandgap of 3.03 eV offers up to 80% higher H_2 production than TiO_2 P25. Photocatalytic H_2 production with Fe-Graphene/TiO_2 and 10% v/v alcohols as sacrificial agents were revealed to decrease in the following order: glycerol > ethylene glycol > methanol > propylene glycol > n-propanol. Correlations were obtained between H_2 yield and key alcohol properties, notably the number of α-H, polarity, and oxidation potential of the alcohols.show more
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