Br vacancy engineering in Cs3Bi2Br9 for photocatalytic NO oxidation under visible light

Chen, Jingwen; Menglin, Wu; Ni, Jiupai; Ni, Chengsheng

doi:10.1007/s11356-023-25993-8

Cited by 1 publication

(4 citation statements)

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“…Chen et al showed that the Br vacancy engineering in Cs 3 Bi 2 Br 9 resulted in the bandgap change from 2.54 to 2.27 eV. [100] Recently, the defect engineering for tunning the optical properties of MHPs has also been demonstrated in MAPbI 3 , [11b] CsPbBr 3 , [101] and Cs 3 Sb 2 I 9 . [11c] Note that accurately .…”

Section: Light Absorptionmentioning

confidence: 99%

“…Together with PL, EIS, and Tafel plots measurements, they confirmed the superiority of Cl vacancy rich Cs 2 NaBiCl 6 in charge transfer. Also, CsPbBr 3−x I x with I vacancies, [106] Cs 3 Sb 2 I 9 with I vacancies, [11c] Cs 2 AgBiBr 6 with Br vacancies, [11d,e,g] Cs 3 Bi 2 Br 9 with Br vacancies, [100] have been discovered to facilitate the charge separation and transfer. Therefore, deliberately designing and synthesizing defects in MHP materials is promising for booting charge dynamics.…”

Section: Charge Dynamicsmentioning

confidence: 99%

“…[106] X-ray photoelectron spectroscopy and surface photovoltage analyses showed that the CsPbBr 3−x I x with iodide vacancies are the main surface defects that facilitate the formation of • O 2 -, and lead to a better photocatalytic activity for the oxidation of 𝛽-naphthol. Beyond these reports, Chen et al studied the dopant-induced Br vacancy in Cs 3 Bi 2 Br 9 for photocatalytic NO oxidation, [100] in which partially replacing Bi 3+ with Pb 2+ yielded the Br vacancy in the Cs 3 Bi 2−x Pb x Br 9−x (0 ≤ x ≤ 0.0789) samples. Impressively, the formed Br vacancy favors NO adsorption and activation and visible-light harvesting.…”

Section: Pollutant Degradationmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Defects of Metal Halide Perovskites in Photocatalytic Energy Conversion: Friend or Foe?

Wang,

Xie,

Wang

et al. 2024

Advanced Science

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Photocatalytic solar‐to‐fuel conversion over metal halide perovskites (MHPs) has recently attracted much attention, while the roles of defects in MHPs are still under debate. Specifically, the mainstream viewpoint is that the defects are detrimental to photocatalytic performance, while some recent studies show that certain types of defects contribute to photoactivity enhancement. However, a systematic summary of why it is contradictory and how the defects in MHPs affect photocatalytic performance is still lacking. In this review, the innovative roles of defects in MHP photocatalysts are highlighted. First, the origins of defects in MHPs are elaborated, followed by clarifying certain benefits of defects in photocatalysts including optical absorption, charge dynamics, and surface reaction. Afterward, the recent progress on defect‐related MHP photocatalysis, i.e., CO2 reduction, H2 generation, pollutant degradation, and organic synthesis is systematically discussed and critically appraised, putting emphasis on their beneficial effects. With defects offering peculiar sets of merits and demerits, the personal opinion on the ongoing challenges is concluded and outlining potentially promising opportunities for engineering defects on MHP photocatalysts. This critical review is anticipated to offer a better understanding of the MHP defects and spur some inspiration for designing efficient MHP photocatalysts.

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Section: Light Absorptionmentioning

confidence: 99%

Section: Charge Dynamicsmentioning

confidence: 99%