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Single Pd atoms supported on ultra-thin bismuth tungstate nanosheets with oxygen vacancies as an efficient photocatalyst
- Release time:2023-01-30
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14.511DOI number:
10.1039/D2TA07120GJournal:
Journal of Materials Chemistry AAbstract:
Efficient and highly selective photocatalysts for NO oxidation remain a great challenge. In this work, single Pd atoms are deposited onto ultrathin bismuth tungstate (UBWO) nanosheets with O vacancies (Pd-VO-UBWO) by an impregnation combined with calcination method for the first time. The Pd-VO-UBWO catalysts exhibit efficient and highly selective photocatalytic activity for the degradation of NO. At a NO inlet concentration of 48 ppm, the NO conversion rate using the Pd-VO-UBWO catalyst is 89.5% within 1 h of visible light irradiation, which is much higher than that of VO-UBWO (45.7%). Its selectivity for NO conversion to NO3− ions is 78.5%. Moreover, experimental results show that the introduction of single Pd atoms promotes the generation of O2˙− and OH˙. Density functional theory calculations indicate that single Pd atoms favor the adsorption and activation of NO on the Pd-VO-UBWO surface, thus boosting the effective conversion of NO. Furthermore, the Pd-VO-UBWO catalyst can achieve higher degradation efficiency of Rhodamine B (86.9%) in liquid solution than VO-UBWO (68.8%).Indexed by:
Journal paperVolume:
11Page Number:
1723-1733Translation or Not:
noLinks to published journals:
https://pubs.rsc.org/en/content/articlehtml/2023/ta/d2ta07120g
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