Customized Ultrathin Oxygen Vacancy-Rich Bi 2 W 0.2 Mo 0.8 O 6 Nanosheets Enabling a Stepwise Charge Separation Relay and Exposure of Lewis Acid Sites toward Broad-Spectrum Photothermal Catalysis.

Autor: Yi J; College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian, 350117, P. R. China., Yang X; College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian, 350117, P. R. China., Shen L; College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian, 350117, P. R. China., Xue H; College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian, 350117, P. R. China., Yang MQ; College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian, 350117, P. R. China., Qian Q; College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian, 350117, P. R. China.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Aug 09, pp. e2404579. Date of Electronic Publication: 2024 Aug 09.
DOI: 10.1002/smll.202404579
Abstrakt: Designing robust photocatalysts with broad light absorption, effective charge separation, and sufficient reactive sites is critical for achieving efficient solar energy conversion. However, realizing these aims simultaneously through a single material modulation approach poses a challenge. Here, a 2D ultrathin oxygen vacancy (Ov)-rich Bi 2 W 0.2 Mo 0.8 O 6 solid solution photocatalyst is designed and fabricated to tackle the dilemma through component and structure optimization. Specifically, the construction of a solid solution with ultrathin structure initially facilitates the separation of photoinduced electron-hole pairs, while the introduction of Ov strengthens such separation. In the meantime, the presence of Ov extends light absorption to the NIR region, triggering a photothermal effect that further enhances the charge separation and accelerates the redox reaction. As such, photoinduced charge carriers in the Ov-Bi 2 W 0.2 Mo 0.8 O 6 are separated step by step via the synergistic action of 2D solid solution, O V , and solar heating. Furthermore, the introduction of O V exposes surface metal sites that serve as reactive Lewis acid sites, promoting the adsorption and activation of toluene. Consequently, the designed Ov-Bi 2 W 0.2 Mo 0.8 O 6 reveals an enhanced photothermal catalytic toluene oxidation rate of 2445 µmol g -1  h -1 under a wide spectrum without extra heat input. The performance is 9.0 and 3.9 times that of Bi 2 WO 6 and Bi 2 MoO 6 nanosheets, respectively.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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