(TiO₂(B) Nanosheet)/(Metallic Phase MoS₂) Hybrid Nanostructures: An Efficient Catalyst for Photocatalytic Hydrogen Evolution

Abstract

Developing photocatalysts that can efficiently produce hydrogen from water under solar irradiation is highly desired for sustainable and clean hydrogen energy. Herein, it is demonstrated that (TiO 2 (B) nanosheet)/(metallic phase MoS 2 ) hybrid nanostructures have high activity for photocatalytic hydrogen evolution from water. The TiO 2 (B) nanosheets are prepared by solvothermal reaction with TiCl 3 as a precursor in the presence of ethylene glycol. Due to the short transportation distance of charge carriers, more negative conduction band edge, and the existence of oxygen vacancy, the photocatalytic activity of the pure TiO 2 (B) nanosheets is one order of the magnitude larger than that of the commercial P25. After loading metallic phase MoS 2 , the photocatalytic activity of TiO 2 (B) is further improved by %13 times to 1444 μmol g À1 h À1 because of the superior activity of metallic phase MoS 2 for hydrogen evolution. The findings provide a cost-effective and highly active photocatalyst for hydrogen production from water and are very helpful for the development of sustainable and clean hydrogen energy.

MoS2 and Ti3C2 Ensembles into TiO2 for Efficient Photocatalytic Hydrogen Evolution: Dual‐Bonding Interactions and Capacitive Effect Trigger the Intrinsic Activities

“…As shown in Figure 4g, the CV area of TM 7–3 remarkably increases upon the introduction of high‐capacitance materials (MoS 2 and Ti 3 C 2 ). [ 42 ] As shown in Figure S10 and Table S1, Supporting Information, a higher average lifetime of TM 7–3 composite (5.76 ns) than that of TiO 2 (4.76 ns) as well by TRPL clearly confirms that TM composite has a longer carrier lifetime. The aforementioned results offer direct evidence that the excellent photocatalytic performance can be significantly triggered by the capacitive properties.…”

“…[ 40 ] To date, molybdenum sulfide (MoS 2 ) with a layered structure, which is reckoned as the cocatalyst candidate most likely to replace precious metals, has sparked intense interests in developing novel MoS 2 ‐based materials for photocatalytic applications. [ 41–44 ] Li and coworkers reported enhancement of the photocatalytic H 2 production activity of CdS by loading MoS 2 as cocatalyst. [ 45 ] Yuan et al reported the 2D–2D heterojunction between MoS 2 nanosheets and (001) TiO 2 nanosheets serve as decisive factor in improving the photocatalytic H 2 production.…”

Single‐Atom Pt Loaded Zinc Vacancies ZnO–ZnS Induced Type‐V Electron Transport for Efficiency Photocatalytic H2 Evolution

“…[3][4][5][6] Among them, transition metal sulfides have received extensive attention from researchers because of their unique electronic structure, tunable optical properties, suitable band gap, and band edges. [7][8][9] Transition metal sulfides such as MoS 2 , CdS, ZnIn 2 S 4 , and WS 2 have shown good effect in photocatalytic H 2 evolution, O 2 evolution, and pollutant degradation. [10][11][12][13] Notably, ZnS has good thermal stability, high electron mobility, nontoxic, water-insoluble, and relatively cheap cost, which was considered to be a more ideal catalyst.…”

High-Efficiency Photocatalytic Degradation of Tannic Acid Using TiO2 Heterojunction Catalysts

“…It has become a research focus in energy and the environment. , The photocatalytic efficiency depends on the light absorption intensity and carrier transfer efficiency of photocatalysts. To date, excellent materials such as graphene, − molybdenum disulfide, − and titanium dioxide (TiO 2 ) have been developed for the photocatalytic processes. − …”