The visible light photocatalytic performance of g-C3N4 is regulated by the Brønsted acid site on the mullite surface

Xiao, Chenyang; Dong, Guohui; Yao, Tingan; Han, Kai; Dong, Tingting; Zhou, Tong

doi:10.1016/j.apsusc.2024.159453

Cited by 4 publications

(1 citation statement)

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“…The photocatalytic reaction usually consists of three steps: (i) absorption of photons by the photocatalytic material to excite electron–hole (e – –h + ) pairs; (ii) migration of effective carriers to the surfaces of the photocatalysts; (iii) accordingly, surface redox reaction. Effective generations of photoinduced h + subsequently resulting in various active species, e.g., superoxide radicals ( • O 2 – ) and hydroxyl radicals ( • OH), which could oxidatively remove dilute NO by converting it into more stable products, e.g., NO 3 – . − Unfortunately, photocatalytic NO oxidation is accompanied by the generation of undesired intermediate NO 2 , which is more toxic than NO itself and results in subsequent deactivation of photocatalysts and decreasing reaction selectivity. Moreover, photoreduction of NO usually requires the introduction of additional reducing agents, which turns out to be more challenging and less efficient .…”

Section: Introductionmentioning

confidence: 99%

2D Bismuth-Based Nanomaterials for Photocatalytic Nitrogen Oxide Removal: Progress and Prospects

Lu,

Wang,

et al. 2024

ACS Sustainable Chem. Eng.

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Nitrogen oxides (NO x , ∼95% NO) are significant atmospheric pollutants that contribute to environmental issues like acid rain and ozone layer depletion. The traditional remediation methods of physical/chemical adsorption and postcombustion reduction techniques fall short in effectively removing gaseous NO at parts per billion (ppb) levels. Consequently, photocatalysis for NO elimination has garnered intensive attention for its cost-effectiveness, efficiency, and ecofriendly attributes. Within the emerging nanomaterials for photocatalytic NO removal, 2D bismuth-based (Bi-based) photocatalysts are pivotal due to their distinctive electronic and structural characteristics. Nonetheless, a comprehensive review of the mechanisms and efficacy of NO removal via 2D Bi-based photocatalysts is still lacking. This review endeavors to fill that gap, elucidating the possible reaction pathways employed by 2D Bi-based nanomaterials for photocatalytic NO oxidation or reduction. Furthermore, it extends to highlight the main factors influencing their photocatalytic efficiencies and summarize three primary modification strategies for enhancement of the photocatalytic activities of 2D Bi-based nanomaterials, encompassing defect engineering, elemental doping, and the construction of heterojunctions. Finally, this review culminates with a forward-looking perspective in developing high-performance 2D Bi-based photocatalysts for NO removal, which underscores existing challenges and sparks new ideas for future work.

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