Photocatalysis Meets Piezoelectricity in a Type-I Oxygen Vacancy-Rich BaTiO₃/BiOBr Heterojunction: Mechanism Insights from Characterizations to DFT Calculations

Inorganic Chemistry, Год журнала: 2024, Номер 63(14), С. 6500 - 6513

Опубликована: Март 27, 2024

It is a challenging task to design piezoelectric photocatalyst with excellent performance under mechanical agitation instead of ultrasonic irradiation. Integrating vacancy defects into heterojunction seems be an effective strategy for synergistically increasing its piezo-photocatalytic performance. For this goal, two-step hydrothermal method was adopted architect type-I oxygen-vacancy-rich BaTiO3/BiOBr surge the degradation Rhodamine B (RhB) combined action simulated sunlight irradiation and agitation. Various instrumental techniques demonstrated formation high crystallinity. The existence surface oxygen vacancies confirmed by XPS EPR tests. PFM results manifested that had properties, response value 30.31 pm V–1. Comparative experiments indicated RhB efficiency piezo-photocatalysis over largely exceeded total sum those piezocatalysis photocatalysis. h+, ·O2–, 1O2 were dominant reactive species degradation. improved separation photogenerated charges verified electrochemical measurements. DFT calculations polarization BaTiO3 could affect electronic band structure BiOBr. This work will provide comprehensive insights mechanism at microcosmic level help develop new-styled photocatalysts.

Язык: Английский

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MoS₂ Nanoflowers Decorated on Graphene Aerogels for Visible-Light-Driven Photocatalytic Degradation of Tetracycline

ACS Applied Nano Materials, Год журнала: 2023, Номер 6(14), С. 12991 - 13000

Опубликована: Июль 10, 2023

The transformation of recalcitrant pharmaceutical pollutants into products with diminished concerns via heterogeneous photocatalysis has gained considerable momentum over the past several years. However, practical applications most semiconductor-based photocatalysts are severely restricted, attributed to insufficient visible light response pertaining their wide band gap, ultrafast recombination photogenerated charge carriers, and issues corresponding retrieval for persistent usage. Herein, rosette-like molybdenum disulfide (MoS2) nanoflowers directly grown on interpenetrating networks graphene aerogels (GAs) through a facile one-step hydrothermal method, resulting lightweight, self-supporting composites systematically assessed photocatalytic degradation tetracycline (TC). Notably, after 120 min exposure light, ∼91% TC is degraded MoS2/GAs, which severalfold higher than pristine MoS2, standalone GA, other contemporary photocatalysts. Based radical quenching assay, hydroxyl radicals superoxide anions principal mediators dissociation TC. Furthermore, primary intermediates residual breakdown distinguished, conceivable disintegration pathway proposed. Besides, these tailor-made hybrid can be recuperated easily successfully reused multiple cycles, suggesting widespread consideration in wastewater treatment.

Язык: Английский

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Two-dimensional V2O3 MOene as promising hydrogen evolution reaction electro-catalyst revealed by first-principles calculations

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 58, С. 1587 - 1595

Опубликована: Фев. 5, 2024

Язык: Английский

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High entropy spinel oxide nanoparticles for visible light-assisted photocatalytic degradation of binary mixture of antibiotic pollutants in different water matrixes

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(27), С. 16815 - 16830

Опубликована: Янв. 1, 2024

The photocatalytic application of magnetic high entropy oxide nanoparticles in water and wastewater treatment processes is exemplified for the first time, purely from a practical perspective.

Язык: Английский

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Aerogels Made of Few-Layer WS₂ Nanosheets and Nitrogen-Doped Graphene for Photocatalytic Degradation of Caffeine

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(2), С. 1723 - 1737

Опубликована: Янв. 10, 2024

As a spontaneous renewable energy-based technology, with an astonishing ability to destroy recalcitrant organic pollutants under ambient conditions, solar-driven heterogeneous photocatalysis has sparked immense interest over the past decade. However, creating photocatalysts astounding visible-light harnessing capacity and undemanding recuperation persists as significant hurdle widespread exploitation of in water treatment. Herein, we propose potentially nontoxic, robust, durable, self-supporting photocatalyst, based on situ growth few-layer (FL) WS2 nanosheets interpenetrating channels nitrogen (N)-doped graphene aerogel (henceforth denoted "WNGA"). Constructed through mild hydrothermal processing scheme, WNGA shows self-floating capability, exceptional mechanical resilience, remarkable solar absorption visible range. In addition, coexistence pyridinic N species FL-WS2 clusters synergistically provides surplus active sites for catalytic reactions. Besides, interconnected conductive networks coherently upregulate charge separation transfer 3D. result these beneficial attributes, presents prominent photocatalytic activity excellent recycling stability. For instance, combination adsorption partial oxidation, can dissociate up 93% caffeine, most widely consumed psychoactive substance, into innocuous products multiple cycles. figure-of-merit commercial potential WNGA, also demonstrate degradation caffeine four different real matrixes, viz., tap water, pond municipal wastewater, hospital wastewater. The properties, improved durability, facile retrieval opportunities validate application eliminate substances aqueous environments.

Язык: Английский

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Three-Dimensional Highly Porous MoS₂/Graphene Aerogel for Visible-Light-Driven Photocatalytic Degradation of Tetracycline

ACS ES&T Water, Год журнала: 2024, Номер 4(5), С. 2144 - 2158

Опубликована: Апрель 29, 2024

Composite aerogels are an exciting new class of porous photocatalysts, attributed to their extremely lightweight, impressive specific surface area, ease application, and convenience retrieval after the decontamination process. Herein, lightweight highly molybdenum disulfide/graphene aerogel (pMGA) has been successfully developed through a facile scalable two-step method comprehensively evaluated for photocatalytic degradation tetracycline (TC). Particularly, influence porosity on reaction kinetics percentage removal TC is explored because its implications in light absorption, charge separation, transfer, as well molecular diffusion transport. The sample with largest pore size exhibits efficiency rate approximately 1.6 3.1 times greater than those conventional MGA by providing abundantly accessible active sites both adsorption reactions. In addition, larger width increases generation electrons holes, thus reactive oxygen species, penetration scattering within interconnected graphene networks subsequent enhancement light-MoS2 interactions. Furthermore, promising performance pMGA municipal wastewater hospital highlights tremendous potential photocatalyst visible-light-assisted pharmaceutical micropollutants from aquatic systems.

Язык: Английский

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Recent Advances in Layered MX2-Based Materials (M = Mo, W and X = S, Se, Te) for Emerging Optoelectronic and Photo(electro)catalytic Applications

Catalysts, Год журнала: 2024, Номер 14(6), С. 388 - 388

Опубликована: Июнь 17, 2024

Transition metal dichalcogenides (TMDCs), represented by MX2 (where M = Mo, W and X S, Se, Te), more recently, their moiré superlattices (i.e., formed superimposing layers of TMDCs with different rotation angles) have attracted considerable interest due to excellent physical properties unique nanoscale functionalities. Compared graphene, the literature indicates that offer a competitive advantage in optoelectronic technologies, primarily owing compositionally controlled non-zero bandgap. These two-dimensional (2D) nanostructured single or multiple exhibit remarkable differ from bulk counterparts. Moreover, stacking TMDC monolayers also forms heterostructures introduces quantum effects extraordinary electronic properties, which is particularly promising for next-generation devices photo(electro)catalytic applications. Therefore, this review, we highlight new possibilities formation 2D/2D MX2-based materials patterns discuss main critical challenges related synthesis large-scale applications layered composites spur significant advances emerging

Язык: Английский

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Green synthesis of g-C3N4 decorated with SnO2 nanocomposites using a novel Ananas comosus crown extract for boosted performance of asymmetric supercapacitors

Journal of Energy Storage, Год журнала: 2024, Номер 98, С. 113231 - 113231

Опубликована: Авг. 5, 2024

Язык: Английский

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Enhanced visible light photocatalytic degradation of oxytetracycline through sugarcane bagasse biochar supported layered WS2 type-II staggered heterojunction: Towards performance, degradation pathway, toxicity, and life cycle assessment

Environmental Research, Год журнала: 2025, Номер unknown, С. 121100 - 121100

Опубликована: Фев. 1, 2025

Язык: Английский

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Facile Stitching of Boron-Doped Polymeric Carbon Nitride with Graphene-Based Nanosheets into a Self-Supporting and Recoverable Photocatalyst for Efficient Antibiotic Removal from Wastewater

ACS ES&T Water, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

Язык: Английский

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