| H2is widely known as a kind of high-energy and environmental friendly energy. By splitting water into hydrogen and converting solar energy into chemical energy, many environmental problems may be solved or relieved. This research, therefore, aims to rapidly synthesize photocatalyst TiO2with microwave hydrothermal apparatus. To improve its photocatalystic activity, modulate its energy band structure, and expand the adsorption spectra of visible light, doping Fe ions into TiO2is an effective method. Meanwhile, to improve the photocatalysis of Fe-TiO2, co-catalyst Pt and SPR-effect Au were loaded on Fe-TiO2catalyst.With tetrabutyl titanate as the source of Ti and FeSO4as the dopant of Fe, this research successfully achieves the synthesis of Fe-TiO2in one step by microwave hydrothermal method. By adjusting the doping amount of Fe (0,0.1,0.5,1.0,1.5, and2.0wt.%), the best with the highest hydrogen-generating performance was selected. Based on1.0Fe-TiO2, Pt, Au, and Pt-Au were also loaded to improve the Hydrogen production efficiency. Besides, characterization methods such as XRD, SEM, TEM, XPS, BET, PL, UV-Vis-DRS, CHI, and DFT computation were employed to analyze the appearance and internal features of the catalyst.The research shows that the band gap of TiO2can be constantly modulated by changing Fe doping amounts. In specific, Fe doping can narrow the TiO2band gap, increase visual light adsorption spectra, and as a result enhance the hydrogen generation performance of the photocatalyst. The synergistic effect of Pt and Au could significantly increase the hydrogen generation ability of the catalyst. With various characterization analysis and DFT computation, this article successfully explains the mechanism of hydrogen production by Fe-TiO2and Pt-Au/Fe-TiO2, and reveals the disciplinarians of electron transfer during the reaction. |
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