Rational designing of TiO2-X@Cs3Bi2X9 nanocomposite for boosted hydrogen evolution

Catalysis Today, Год журнала: 2024, Номер 432, С. 114626 - 114626

Опубликована: Март 8, 2024

Halide perovskites are known as compounds possessing interesting properties, including visible light-induced photoactivity, however, they suffer from instability. Herein, a novel technique for reducing the decomposition rate of halide bismuth-based Cs3Bi2X9 (X=I, Br, Cl) in aqueous environment by combining with different types TiO2 (anatase TiO2-I, anatase/rutile TiO2-B, and rutile TiO2-C synthesized using HI, HBr, HCl acids, respectively) has been described. The specific type HX notable impact on crystallinity, morphology, photocatalytic abilities TiO2-X constitute reaction that allows to survive synthesis TiO2. Studies reveal TiO2-I is optimal support material immobilizing perovskite nanoparticles, owing its extensive surface area synergistic effect it Cs3Bi2I9. Adding small amount Cs3Bi2I9 iodine-doped improved performance environment. As result, 24.3, 22.5, 22.0, 13.5-fold improvement H2 production realized decreasing amounts (10, 50, 100, 300 mg). Upon detailed characterization analysis suggested when nanoparticles dispersed within structure, can establish close connection which photogenerated electrons be extracted Cs3Bi2I9, effectively preventing charge recombination. This study provides feasible possibility application perovskite-based nanocomposites

Язык: Английский

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Construction of BiOCl/bismuth-based halide perovskite heterojunctions derived from the metal-organic framework CAU-17 for effective photocatalytic degradation

Chemosphere, Год журнала: 2024, Номер 357, С. 142114 - 142114

Опубликована: Апрель 23, 2024

Язык: Английский

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Nanoscale halide perovskites for photocatalytic CO₂ reduction: product selectivity, strategies implemented, and charge-carrier separation

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(32), С. 20542 - 20577

Опубликована: Янв. 1, 2024

This review summarizes recent advances and provides a comprehensive discussion on nanoscale halide perovskites (NHPs) CO 2 photocatalysis, including product selectivity, retrofitting strategies, charge transport mechanism characterization.

Язык: Английский

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Lead‐Free Halide Perovskite Photocatalysts for Photocatalytic CO₂ Reduction: A Review

Solar RRL, Год журнала: 2023, Номер 7(18)

Опубликована: Июль 5, 2023

Solar‐driven CO 2 conversion is a promising strategy for solving energy and environmental crises. Developing photocatalysts with high performance the key to achieve efficient conversion. Lead halide perovskite considered as photocatalyst solar‐driven due its excellent properties. However, toxicity of Pb significantly limits their practical applications. Therefore, developing lead‐free has full scientific significance in greatly expanding application scenarios reducing risk damage. At present, are attracting widespread attention from researchers currently research hotspot field photocatalysis. Herein, this review systematically describes crystal structure, photochemical characteristics, preparation methods, photocatalytic Then, based on mechanisms reduction, explores structure–activity relationship between microstructure detail introduces modification strategies perovskite. Finally, development prospects challenges discussed fully explore inherent potential reduction. This work provides insights reference further

Язык: Английский

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Recent advance of high-quality perovskite nanostructure and its application in flexible photodetectors

Nanotechnology, Год журнала: 2024, Номер 35(24), С. 242001 - 242001

Опубликована: Март 11, 2024

Abstract Flexible photodetectors (PDs) have garnered increasing attention for their potential applications in diverse fields, including weather monitoring, smart robotics, textiles, electronic eyes, wearable biomedical monitoring devices, and so on. Notably, perovskite nanostructures emerged as a promising material flexible PDs due to distinctive features, such large optical absorption coefficient, tunable band gap, extended photoluminescence decay time, high carrier mobility, low defect density, long exciton diffusion lengths, strong self-trapped effect, good mechanical flexibility, facile synthesis methods. In this review, we first introduce various methods elucidate corresponding electrical properties, encompassing quantum dots, nanocrystals, nanowires, nanobelts, nanosheets, single-crystal thin films, polycrystalline nanostructured arrays. Furthermore, the working mechanism key performance parameters of optoelectronic devices are summarized. The review also systematically compiles recent advancements based on perovskites. Finally, present current challenges prospects development nanostructures-based PDs.

Язык: Английский

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Rational Conversion of Imine linkages to Amide Linkages in Covalent Organic Frameworks for Photocatalytic Oxidation with Enhanced Photostability

ChemSusChem, Год журнала: 2024, Номер unknown

Опубликована: Апрель 25, 2024

Covalent organic frameworks (COFs) and their applications in photocatalysis have been extensively studied, but the instability of imine-linked COFs is an important factor limiting performance. In this work, two were successfully converted to amide-linked through post synthetic modification (PSM). The oxidized presented lower binding energy O

Язык: Английский

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Exploring photoexcitation effects on Cs3Bi2Br9 perovskite single crystal properties

Optical Materials, Год журнала: 2024, Номер 154, С. 115640 - 115640

Опубликована: Июнь 7, 2024

Язык: Английский

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In Situ Growth of Highly Dispersed TiO₂ in Covalent Organic Frameworks for Photocatalytic H₂ Evolution

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 15, 2025

Titanium dioxide (TiO2) has the disadvantages of being difficult to excite and easily agglomerating in use. The imine-linked covalent organic frameworks (COFs) have shown various excellent properties diverse fields, but drawbacks such as monofunctionality poor light-corrosion resistance are problems that need be improved photocatalytic applications. In this paper, COF (COF-Im) was prepared then transformed into a quinoline-based (COF-Qui) by an aza-Diels–Alder reaction, which successfully light absorption stability COFs. COF-Qui-TiO2 heterojunction photocatalyst situ growth TiO2 pores COF-Qui. highest H2 evolution rate 5373 μmol·h–1·g–1, it maintained good performance stable structure after 5 cycles. This work provided valuable experience for development novel, efficient photocatalysts.

Язык: Английский

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Insights into Lead-Free Bismuth-Based Halide Perovskites Toward Alcohol Oxidation Under Blue LED Illumination

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 25, 2025

In recent years, lead halide perovskite materials have been explored as photocatalysts for various organic transformations. However, the toxicity of "lead" has directed further research toward lead-free perovskites. Herein, two bismuth-based perovskites with chemical compositions Cs3Bi2Br9 and Cs3Bi2Br6I3 were synthesized via a modified antisolvent-assisted precipitation method, which resulted in hexagonal morphology materials. was observed to higher bandgap (Eg = 2.5 eV) than 2.0 eV). The photocatalytic activity both studied. Both employed oxidize 1-phenylethanol acetophenone under irradiation blue LEDs (light-emitting diodes, λ 427 nm). oxidation reaction provided 100% conversion after 8 h illumination. only 23% even 14 deep-lying valence band (VB) potential photogenerated holes conduction (CB) reduction electrons Cs3Bi2Br6I3, giving better yield alcohol (1-phenylethanol) oxidation. Furthermore, impedance spectroscopy BET analysis studied gain critical insights into

Язык: Английский

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Copper-Doping Strategy in Cs2CuxNa(1-x)BiCl6 Double Perovskites Enables Enhanced CO2 Photocatalytic Reduction

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116935 - 116935

Опубликована: Май 1, 2025

Язык: Английский

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