Bandgap-energy-adjustable noble-metal-free MoS2-Zn Cd1−S for highly efficient H2 production under visible-light

Wang, Linjuan; Kou, Mingpu; Tournet, Julie; Karuturi, Siva; Zan, Ling

doi:10.1016/j.jtice.2023.105199

Cited by 3 publications

(1 citation statement)

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“…Specifically, the Sn-TiO 2 composite with a 3 wt% Sn content achieved the most impressive hydrogen generation rate, registering at 553.1 µmol•g −1 cat •h −1 , which is nearly 44-fold greater than that of the unmodified TiO 2 , which produced hydrogen at a rate of 12.6 µmol•g −1 cat •h −1 [82]. Co-catalysts hold significant potential to boost photocatalytic efficiency by expanding the absorption wavelength range through adjustments in the energy band structure, and by enhancing the separation and transportation of photoexcited charges via the creation of type II heterojunctions [137][138][139][140] or nano-twin-induced phase junctions [141]. The atomic Ni co-catalyst on TiO 2 NPs was prepared via a new molten salt method, which facilitates the atomic dispersion of Ni ions on TiO 2 with the formation of O vacancies.…”

Section: Sn/ni/co Npsmentioning

confidence: 99%

Recent Progress of Ion-Modified TiO2 for Enhanced Photocatalytic Hydrogen Production

Zhao,

Tang,

Liu

et al. 2024

Molecules

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Harnessing solar energy to produce hydrogen through semiconductor-mediated photocatalytic water splitting is a promising avenue to address the challenges of energy scarcity and environmental degradation. Ever since Fujishima and Honda’s groundbreaking work in photocatalytic water splitting, titanium dioxide (TiO2) has garnered significant interest as a semiconductor photocatalyst, prized for its non-toxicity, affordability, superior photocatalytic activity, and robust chemical stability. Nonetheless, the efficacy of solar energy conversion is hampered by TiO2’s wide bandgap and the swift recombination of photogenerated carriers. In pursuit of enhancing TiO2’s photocatalytic prowess, a panoply of modification techniques has been explored over recent years. This work provides an extensive review of the strategies employed to augment TiO2’s performance in photocatalytic hydrogen production, with a special emphasis on foreign dopant incorporation. Firstly, we delve into metal doping as a key tactic to boost TiO2’s capacity for efficient hydrogen generation via water splitting. We elaborate on the premise that metal doping introduces discrete energy states within TiO2’s bandgap, thereby elevating its visible light photocatalytic activity. Following that, we evaluate the role of metal nanoparticles in modifying TiO2, hailed as one of the most effective strategies. Metal nanoparticles, serving as both photosensitizers and co-catalysts, display a pronounced affinity for visible light absorption and enhance the segregation and conveyance of photogenerated charge carriers, leading to remarkable photocatalytic outcomes. Furthermore, we consolidate perspectives on the nonmetal doping of TiO2, which tailors the material to harness visible light more efficiently and bolsters the separation and transfer of photogenerated carriers. The incorporation of various anions is summarized for their potential to propel TiO2’s photocatalytic capabilities. This review aspires to compile contemporary insights on ion-doped TiO2, propelling the efficacy of photocatalytic hydrogen evolution and anticipating forthcoming advancements. Our work aims to furnish an informative scaffold for crafting advanced TiO2-based photocatalysts tailored for water-splitting applications.

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