State of the Art and Prospects for Halide Perovskite Nanocrystals

ACS Nano, Год журнала: 2021, Номер 15(7), С. 10775 - 10981

Опубликована: Июнь 17, 2021

Metal-halide perovskites have rapidly emerged as one of the most promising materials 21st century, with many exciting properties and great potential for a broad range applications, from photovoltaics to optoelectronics photocatalysis. The ease which metal-halide can be synthesized in form brightly luminescent colloidal nanocrystals, well their tunable intriguing optical electronic properties, has attracted researchers different disciplines science technology. In last few years, there been significant progress shape-controlled synthesis perovskite nanocrystals understanding applications. this comprehensive review, having expertise fields (chemistry, physics, device engineering) joined together provide state art overview future prospects nanocrystal research.

Язык: Английский

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Solar-Driven Metal Halide Perovskite Photocatalysis: Design, Stability, and Performance

ACS Energy Letters, Год журнала: 2020, Номер 5(4), С. 1107 - 1123

Опубликована: Март 6, 2020

The development of green, sustainable, and economical chemical processes represents a cornerstone challenge within chemistry today. Semiconductor heterogeneous photocatalysis is currently utilized wide variety societally impactful processes, spanning reactions such as hydrogen production CO2 conversion, to the organic transformation raw materials for value-added chemicals. Metal halide perovskites (MHPs) have recently emerged new promising class cheap easy make photocatalytic semiconductors, though their unstable ionically bound crystal structure has thus far restricted widespread application. In this Review, we examine issues hampering MHP-based highlight general approaches being taken achieve stable reaction environments. Specifically, outline adoption (1) halogen acid solutions (i.e., HX; X = I or Br) evolution reactions, (2) relatively low-polarity solvents photoreduction transformations, (3) encapsulation reduction water splitting. Further, detail measures arrive at intrinsically materials, removing need atypical With each technology offering unique sets benefits challenges, conclude by outlining potentially opportunities directions metal perovskite-based research moving forward.

Язык: Английский

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Bismuth-based photocatalysts for solar energy conversion

Journal of Materials Chemistry A, Год журнала: 2020, Номер 8(46), С. 24307 - 24352

Опубликована: Янв. 1, 2020

Bismuth-based nanomaterials comprise a rich family of narrow bandgap photocatalysts, providing excellent opportunities for converting sunlight into chemical energy. This article is believed to promote the development efficient photocatalysts.

Язык: Английский

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A Supported Bismuth Halide Perovskite Photocatalyst for Selective Aliphatic and Aromatic C–H Bond Activation

Angewandte Chemie International Edition, Год журнала: 2019, Номер 59(14), С. 5788 - 5796

Опубликована: Дек. 18, 2019

Direct selective oxidation of hydrocarbons to oxygenates by O2 is challenging. Catalysts are limited the low activity and narrow application scope, main focus on active C-H bonds at benzylic positions. In this work, stable, lead-free, Cs3 Bi2 Br9 halide perovskites integrated within pore channels mesoporous SBA-15 silica demonstrate their photocatalytic potentials for bond activation. The composite photocatalysts can effectively oxidize (C5 C16 including aromatic aliphatic alkanes) with a conversion rate up 32900 μmol gcat-1 h-1 excellent selectivity (>99 %) towards aldehydes ketones under visible-light irradiation. Isotopic labeling, in situ spectroscopic studies, DFT calculations reveal that well-dispersed small perovskite nanoparticles (2-5 nm) possess enhanced electron-hole separation close contact facilitates C(sp3 )-H activation photoinduced charges.

Язык: Английский

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Boosted Photocatalytic Oxidation of Toluene into Benzaldehyde on CdIn₂S₄-CdS: Synergetic Effect of Compact Heterojunction and S-Vacancy

ACS Catalysis, Год журнала: 2021, Номер 11(5), С. 2492 - 2503

Опубликована: Фев. 10, 2021

The enhancement of electron-and-hole separation efficiency and facile generation reactive oxygen species are significant factors for performance improvement photocatalysts in selective toluene photocatalytic oxidation. Heterojunction defect construction have been regarded as valid methods to boost activity semiconductors. Herein, the CdIn2S4-CdS composite with compact heterojunctions defect-induced sulfur vacancies was fabricated by a one-step hydrothermal process. sheet-to-sheet abundant facilitate migration photoinduced charge carriers. Benefited from compositional structural synergy, prepared CdIn2S4-CdS-140 boosted oxidation conversion into benzaldehyde (remarkable 80.3% selectivity 99% 6 h) under visible light irradiation. It is noteworthy that can perform well when pure O2 replaced air.

Язык: Английский

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Engineering Lattice Disorder on a Photocatalyst: Photochromic BiOBr Nanosheets Enhance Activation of Aromatic C–H Bonds via Water Oxidation

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(8), С. 3386 - 3397

Опубликована: Фев. 15, 2022

Solar-driven photocatalytic reactions can mildly activate hydrocarbon C-H bonds to produce value-added chemicals. However, the inefficient utilization of photogenerated carriers hinders application. Here, we report reversible photochromic BiOBr (denoted as p-BiOBr) nanosheets that were colored by trapping holes upon visible light irradiation and bleached water oxidation generate hydroxyl radicals, demonstrating enhanced carrier separation oxidation. The coupling ethylbenzene efficiently realized p-BiOBr in a water-based medium under ambient temperature pressure (apparent quantum yield is 14 times pristine BiOBr). feature lattice disordered defects on surface, providing rich uncoordinated catalytic sites inducing structural distortions strain, which further leads an altered band structure significantly performances. These hole-trapping materials open up possibility substantially elevating efficiency for high-efficiency activation various saturated bonds.

Язык: Английский

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Developing sustainable, high-performance perovskites in photocatalysis: design strategies and applications

Chemical Society Reviews, Год журнала: 2021, Номер 50(24), С. 13692 - 13729

Опубликована: Янв. 1, 2021

Recent progress of earth-abundant, nontoxic perovskite oxides, halides and oxyhalides for photocatalysis is discussed related to composition structure.

Язык: Английский

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Semiconductor nanocrystals for small molecule activationviaartificial photosynthesis

Chemical Society Reviews, Год журнала: 2020, Номер 49(24), С. 9028 - 9056

Опубликована: Янв. 1, 2020

The protocol of artificial photosynthesis using semiconductor nanocrystals shines light on green, facile and low-cost small molecule activation to produce solar fuels value-added chemicals.

Язык: Английский

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Boosted Inner Surface Charge Transfer in Perovskite Nanodots@Mesoporous Titania Frameworks for Efficient and Selective Photocatalytic CO₂ Reduction to Methane

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(20)

Опубликована: Фев. 22, 2022

Exploring high-efficiency and stable halide perovskite-based photocatalysts for the selective reduction of CO2 to methane is a challenge because intrinsic photo- chemical instability perovskites. In this study, perovskites (Cs3 Bi2 Br9 Cs2 AgBiBr6 ) were grown in situ mesoporous TiO2 frameworks an efficient reduction. Benchmarked CH4 production rates 32.9 24.2 μmol g-1 h-1 with selectivities 88.7 % 84.2 %, achieved, respectively, which are better than most reported perovskite photocatalysts. Focused ion-beam sliced-imaging techniques used directly image hyperdispersed nanodots confined mesopores tunable sizes ranging from 3.8 9.9 nm. X-ray photoelectronic spectroscopy Kelvin probe force microscopy showed that built-in electric field between titania channels efficiently promoted photo-induced charge transfer. Density functional theory calculations indicate high selectivity was attributed Bi-adsorption-mediated hydrogenation *CO *HCO dominates CO desorption.

Язык: Английский

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Halide Perovskite Materials for Photo(Electro)Chemical Applications: Dimensionality, Heterojunction, and Performance

Advanced Energy Materials, Год журнала: 2021, Номер 12(4)

Опубликована: Май 5, 2021

Abstract In recent years, halide perovskite materials have sparked intensive research, including their burgeoning development in the field of photo(electro)chemical catalysis. Halide are based on abundant and low‐cost elements with a rich structural composition variety molecular morphological dimensionalities. They possess versatile advantages over other photo(electro)catalytic owing to facile adjustment electronic properties via compositional engineering. Thus, rapid photo(electro)catalysts past 4–5 years has opened up new opportunities for diverse applications, ranging from photocatalytic organic reactions (e.g., chemical transformations, photopolymerization, degradation) solar‐to‐chemical fuel conversion water splitting CO 2 reduction). This review aims provide an up‐to‐date discussion applications materials, emphasizing crystal dimensionality, synthetic methodologies, heterojunction structures, fundamental structure‐activity relationships. Furthermore, current challenges future research directions rational design boost overall catalytic performance stability identified envisaged respectively.

Язык: Английский

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