Perovskite Oxide Based Materials for Energy and Environment-Oriented Photocatalysis

ACS Catalysis, Год журнала: 2020, Номер 10(17), С. 10253 - 10315

Опубликована: Авг. 27, 2020

The use of solar energy to catalyze the photo-driven processes has attracted tremendous attention from scientific community because its great potential address and environmental issues. In this regard, several attempts have been made by researchers design develop different materials with enhanced photocatalytic efficiencies. This Review comprehensively summarizes recent reports on perovskite oxide based photocatalysts for organic pollutant degradation, water splitting, carbon dioxide conversion, nitrogen fixation along basic understanding involved mechanisms, current trends advances in field. design, synthesis, development strategies discussed detail provide a comprehensive view materials' fabrication that influences their properties. Subsequently, insights materials, including simple oxides, mixed layered are provided above-mentioned applications detailed manner. Finally, summary perspective future research direction discussed. Based progress field, it is highly anticipated systems, comprising groundbreaking technologies large-scale realization these processes, can be established near environment-oriented challenges.

Язык: Английский

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Recent advances in application of graphitic carbon nitride-based catalysts for degrading organic contaminants in water through advanced oxidation processes beyond photocatalysis: A critical review

Water Research, Год журнала: 2020, Номер 184, С. 116200 - 116200

Опубликована: Июль 18, 2020

Язык: Английский

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Facile fabrication of TaON/Bi2MoO6 core–shell S-scheme heterojunction nanofibers for boosting visible-light catalytic levofloxacin degradation and Cr(VI) reduction

Chemical Engineering Journal, Год журнала: 2021, Номер 428, С. 131158 - 131158

Опубликована: Июль 7, 2021

Язык: Английский

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Ta3N5/CdS Core–Shell S-scheme Heterojunction Nanofibers for Efficient Photocatalytic Removal of Antibiotic Tetracycline and Cr(VI): Performance and Mechanism Insights

Advanced Fiber Materials, Год журнала: 2023, Номер 5(3), С. 994 - 1007

Опубликована: Фев. 16, 2023

Язык: Английский

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A metal-free photocatalyst for highly efficient hydrogen peroxide photoproduction in real seawater

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Янв. 20, 2021

Abstract Artificial photosynthesis of H 2 O from and , as a spotless method, has aroused widespread interest. Up to date, most photocatalysts still suffer serious salt-deactivated effects with huge consumption photogenerated charges, which severely limit their wide application. Herein, by using phenolic condensation approach, carbon dots, organic dye molecule procyanidins 4-methoxybenzaldehyde are composed into metal-free photocatalyst for the photosynthetic production in seawater. This catalyst exhibits high photocatalytic ability produce yield 1776 μmol g −1 h ( λ ≥ 420 nm; 34.8 mW cm −2 ) real seawater, about 4.8 times higher than pure polymer. Combining in-situ photoelectrochemical transient photovoltage analysis, active site catalytic mechanism this composite seawater also clearly clarified. work opens up an avenue highly efficient practical, available photoproduction

Язык: Английский

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Embedding CdS@Au into Ultrathin Ti_3–xC₂T_y to Build Dual Schottky Barriers for Photocatalytic H₂ Production

ACS Catalysis, Год журнала: 2021, Номер 11(14), С. 8510 - 8520

Опубликована: Июнь 29, 2021

One of the research hotspots in solar energy conversion is developing photocatalysts for visible-light-driven H2 production. In this study, a ternary CdS@Au/MXene composite was elaborately constructed by facile situ self-assembly strategy, where ultrathin Ti3–xC2Ty nanosheets with characteristic Ti vacancies were employed as support core–shell structured CdS@Au nanojunctions. presence 1.0 wt % MXene, merely 0.1 Au helped composites achieve high H2-production rate 5371 μmol·g–1·h–1 under visible-light irradiation, more than 26.6 times higher that bare CdS. Such an enhancement predominantly attributed to "dual Schottky barriers" formed at interface CdS@Au/MXene, which evidenced systematic characterizations including X-ray photoelectron spectroscopy and Kelvin probe measurements, conjunction density functional theory (DFT) calculations. This work not only highlights significant role MXene reducing dosage noble metal cocatalysts photocatalysis, but also opens avenues fabricate MXene-based beyond.

Язык: Английский

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Vacancy Engineering in Semiconductor Photocatalysts: Implications in Hydrogen Evolution and Nitrogen Fixation Applications

Advanced Functional Materials, Год журнала: 2021, Номер 31(28)

Опубликована: Апрель 25, 2021

Abstract It is a well‐known fact that the pronounced photogenerated charge recombination and poor light absorption are main bottlenecks of photocatalysis applications. The conventional approaches to address these problems involve bandgap engineering suppression after irradiation, which results in an enhancement photocatalytic performance materials. However, most essential aspect surface modification engineer active sites on catalyst generally not given much importance. Contrary this, defect another approach by optical, separation, properties materials can be tuned. In this review article, effect introduction vacancies selected semiconductor materials, viz., metal oxides, perovskite sulfides, oxyhalides, nitrides comprehensively summarized. only improves their optical transfer but also affects properties, helpful adsorption reactants surface. Herein, hydrogen evolution nitrogen fixation applications vacancy engineered discussed detail along with current trends, scalability requirements, rigorous experimental protocols.

Язык: Английский

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Metal-Free Catalysis: A Redox-Active Donor–Acceptor Conjugated Microporous Polymer for Selective Visible-Light-Driven CO₂ Reduction to CH₄

Journal of the American Chemical Society, Год журнала: 2021, Номер 143(39), С. 16284 - 16292

Опубликована: Сен. 21, 2021

Achieving more than a two-electron photochemical CO2 reduction process using metal-free system is quite exciting and challenging, as it needs proper channeling of electrons. In the present study, we report rational design synthesis redox-active conjugated microporous polymer (CMP), TPA-PQ, by assimilating an electron donor, tris(4-ethynylphenyl)amine (TPA), with acceptor, phenanthraquinone (PQ). The TPA-PQ shows intramolecular charge-transfer (ICT)-assisted catalytic activity for visible-light-driven photoreduction to CH4 (yield = 32.2 mmol g–1) impressive rate (2.15 h–1 high selectivity (>97%). Mechanistic analysis based on experimental results, in situ DRIFTS, computational studies reveals that potential catalyzing was energetically driven photoactivated ICT upon surface adsorption CO2, wherein adjacent keto groups PQ unit play pivotal role. critical role stimulating photocatalysis further illustrated synthesizing another CMP (TEB-PQ), bearing triethynylbenzene (TEB) PQ, 8-fold lesser toward 4.4 compared TPA-PQ. results demonstrate novel concept efficient, sustainable, recyclable robust organic photocatalyst.

Язык: Английский

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Enhanced Photocatalytic CO₂ Reduction Activity over NH₂-MIL-125(Ti) by Facet Regulation

ACS Catalysis, Год журнала: 2020, Номер 11(2), С. 650 - 658

Опубликована: Дек. 30, 2020

Designation and optimization of facets photocatalysts is an effective strategy to address the issue facet-dependent photocatalytic reactions. However, studies regarding facet effect metal–organic frameworks (MOFs) on process are in infancy. In this study, NH2-MIL-125(Ti) with different ratios {001} {111} was exactly controlled synthesized, it found that activity photoreduction CO2 enhanced gradually increasing exposed proportion facets. The exhibit maximal CO CH4 yields 8.25 1.01 μmol g–1 h–1, which 9 5 times higher than those facets, respectively. Also, give highest quantum 0.14 0.07% for production, Steady-state time-resolved fluorescence spectra reveal importance inhibiting recombination photoinduced electrons holes sample Besides, TiIII formed during reaction exhibits strong reducibility CO2. Starting from NH2-MIL-125(Ti), performance can be by regulating This work not only provides a further enhancing tuning active MOFs, but also deep understanding factors improving reduction

Язык: Английский

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Platinum Single Atoms Anchored on a Covalent Organic Framework: Boosting Active Sites for Photocatalytic Hydrogen Evolution

ACS Catalysis, Год журнала: 2021, Номер 11(21), С. 13266 - 13279

Опубликована: Окт. 18, 2021

It is of great importance to explore and achieve a more effective approach toward the controllable synthesis single-atom-based photocatalysts with high metal content long-term durability. Herein, single-atom platinum (Pt) loading anchored on pore walls two-dimensional β-ketoenamine-linked covalent organic frameworks (TpPa-1-COF) presented. Aided by advanced characterization techniques aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (AC HAADF-STEM) X-ray absorption fine structure (XAFS) spectroscopy, it has been demonstrated that atomically dispersed Pt formed TpPa-1-COF support through six-coordinated C3N–Pt–Cl2 species. The optimized Pt1@TpPa-1 catalyst exhibits photocatalytic H2 evolution rate 719 μmol g–1 h–1 under visible-light irradiation, actual 0.72 wt %, large turnover frequency (TOF) 19.5 h–1, activity equivalent 3.9 48 times higher than those nanoparticles/TpPa-1 bare TpPa-1, respectively. improved performance for ascribed photogenerated charge separation migration well-dispersed active sites Pt. Moreover, density functional theory (DFT) calculations further reveal role single atoms in enhanced evolution. Overall, this work provides some inspiration designing outstanding stability efficiency using COFs as support.

Язык: Английский

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