Cobalt Chromate Nanoparticles Embedded in a Poly(vinylidene fluoride) Membrane for the Piezocatalytic Wastewater Remediation

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(22), С. 26248 - 26266

Опубликована: Ноя. 6, 2024

Herein, we first report an eco-friendly and easily retrievable piezo-responsive membrane fabricated by encapsulating chemically synthesized cobalt chromate quantum dots (CCOQDs) at varying concentrations (0%, 10%, 20%) in poly(vinylidene fluoride) (PVDF) using a facile solution-casting method. The with 10% CCOQDs (PCCO 10) exhibited high β-phase fraction (75.93%), significant dielectric constant (56.22) notable piezo-coefficient (d33= 65.1 pC/N), demonstrating strong piezocatalytic activity. It effectively generated reactive oxygen species (ROS), which reacted dye solutions, leading to 98.7% congo red (CR), 89.9% methylene blue (MB), 87% mixed (1:1 of CR MB) degradation within 50 min soft ultrasonic stimulation, primarily due •OH radicals, as confirmed scavenger trapping experiments. Additionally, the removed 81.98% total organic carbon (TOC) 75 min. Optimization alkaline pH solution, 60 W power, 1 ppm concentration enhanced its catalytic efficiency, selectivity, stability. Real-world testing on drinking wastewater showed efficiencies 94.65% 98.31%, highlighting versatility for industrial household applications. flexible PCCO 10 also demonstrated excellent reusability (97.2% efficiency after four cycles) maintained structural integrity under low-frequency such centrifugation, vortexing, stirring, confirming activity degradation. Furthermore, products were identified LC-MS technique. Also, pot study established that these molecules have no phytotoxic effects neem (Azadirachta indica) plants. Hence, this multifunctional free-standing holds promising potential alternative sustainable treatment.

Язык: Английский

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Reaction-Based SERS Probes for the Detection of Raman-Inactive Species

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 27, 2024

Surface-enhanced Raman spectroscopy (SERS) has the advantages of high sensitivity, low water interference, narrow spectral peaks for multicomponent analysis, and rich molecular fingerprint information, presenting great potential to be a robust analytical technology. However, key issue is unavailability in directly detecting Raman-inactive species with small scattering cross-section. Current research addressed this by using specific chemical reactions induce significant characteristic changes SERS signals, enabling sensitive selective detection species. This reaction-activated sensing strategy provides clever approach precise determination In review, we have first summarized design principles types reaction-based probes. Furthermore, examined enormous probes bioactive species, environmental pollutants, food contaminants. Finally, discussed depth challenges prospects on stability, reliability, intelligence. The review aimed inspire more advanced probes, thus further facilitating their extensive applications analysis.

Язык: Английский

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Practical SERS Substrates by Spray Coating of Silver Solutions for Deep Learning-Assisted Sensitive Antigen Identification

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2024, Номер unknown, С. 135828 - 135828

Опубликована: Дек. 1, 2024

Язык: Английский

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Thermally and Electrically Regulated Plasmonic Devices Based on VO₂-Covered Gold Nanoplate Arrays with SiO₂ Interface Layer for Large Plasmon Shifts

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 17(1), С. 1441 - 1450

Опубликована: Дек. 16, 2024

Integrating metal nanoparticles with vanadium dioxide (VO2) is an effective means to realize active plasmonic regulation which has great application potential in optical devices that respond real-time external stimuli. However, the high temperature necessary for VO2 growth severely reshapes nanoparticles, causing reduced refractive index (RI) sensitivity and degraded modulation performance. Herein, we construct a large-area dynamically tunable system composed of VO2-covered array hexagonal gold nanoplates (AuNPLs). By introducing SiO2 interface layer, thermal tolerance AuNPLs effectively improved, making RI (∼368.3 nm/RIU at 855 nm) survive subsequent deposition. Through tuning localized surface plasmon resonance (LSPR) AuNPL thickness film, LSPR-related transmission dip can be tailored near-infrared region where shows large two-phase contrast, shift up 272 nm therefore realized upon phase transition. Furthermore, electro-optic demonstrated through electrically triggered partial transition accompanied by gradually changed dielectric permittivity, continuous from 1070 860 achieved varying applied electrical current flowing film. This work provides feasible route controllably constructing stimuli-response wavelength amplitude.

Язык: Английский

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Simple and rapid capillarity-assisted ultra-trace detection of thiram on apple surface with a silver nanoparticles/filter paper SERS substrate

Journal of Hazardous Materials, Год журнала: 2024, Номер 485, С. 136945 - 136945

Опубликована: Дек. 19, 2024

Язык: Английский

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Ultra-Sensitive Abscisic Acid Detection Using Gold and 4-Mercaptopyridine Perovskite-Engineered Robust Nanofibers (GLAMPER-NFs) under Surface-Enhanced Raman Spectroscopy

Journal of Agricultural and Food Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Дек. 18, 2024

This study explores the development and application of gold 4-mercaptopyridine (MPY) perovskite-engineered robust nanofibers (GLAMPER-NFs) for ultrasensitive detection Abscisic acid (ABA) under Raman spectroscopy, a crucial plant hormone. The GLAMPER-NFs composite material, consisting MAPbCl

Язык: Английский

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