365 results match your criteria: "Hunan Institute of Science and Technology[Affiliation]"

Maximizing the exposure of edge sites and achieving sufficient promotion remain arduous tasks for designing efficient bimetallic MoS-based catalysts. Herein, ultrathin CoMoS nanosheets vertically grown on reduced graphene oxide (CoMoS/rGO-DMF) were fabricated by a facile one-pot solvothermal method using dimethylformamide (DMF) as solvent. The vertically aligned structure and good Co promotion endow CoMoS/rGO-DMF with abundant Co-Mo-S active sites and excellent catalytic performance in the hydrodeoxygenation (HDO) reaction.

View Article and Find Full Text PDF

High-power giant magnetostrictive underwater transducers are integral to underwater active sonar detection systems due to their high energy density, rapid dynamic response, and significant output force. However, these transducers exhibit complex nonlinear dynamic hysteresis behavior, which is influenced by the coupling of electric, magnetic, mechanical, and acoustic fields. This complexity presents considerable challenges in accurately characterizing their output properties.

View Article and Find Full Text PDF

Achieving both high activity and good stability remains a challenge for the design of MoS-based catalysts in the hydrodeoxygenation (HDO) reaction. Herein, a robust catalyst with single-layer CoMoS anchored on hydrophobic reduced graphene oxide (SL-CoMoS/rGO) was fabricated, which exhibited high activity, selectivity and excellent stability in the HDO of lignin-derived phenolics to arenes. Utilizing the HDO of 4-methylphenol as a probe reaction, the catalyst afforded a conversion of 98.

View Article and Find Full Text PDF

High-entropy oxides represent a paradigm shift in sodium-ion battery cathodes by utilizing entropy-driven structural stabilization to address the intrinsic challenges of lattice strain and sluggish ion kinetics. However, conventional high-entropy oxides face challenges in synthesis complexity and insufficient mechanistic insights into strain-kinetics coupling. Here, a high-entropy O3-type layered oxide, NaNiCoFeMnZnCuTiO (NNCFMZCT), is proposed featuring seven transition metals in a single crystallographic site, to synergistically optimize Na⁺ diffusion and structural resilience.

View Article and Find Full Text PDF

Traditional Graph Neural Network (GNN) learning patterns can only achieve optimal performance under the assumption of independent and identically distributed data. However, in real-world scenarios, numerous unpredictable factors give rise to the Out-of-Distribution (OOD) problem. Moreover, this distribution discrepancy may lead to unreliable predictions by GNNs models within unknown OOD domains.

View Article and Find Full Text PDF

Both biosystems and engineering fields demand advanced friction-reducing and lubricating materials. Due to their hydrophilicity and tissue-mimicking properties, hydrogels are ideal candidates for use as lubricants in water-based environments. They are particularly well-suited for applications involving biocompatibility or interactions with intelligent devices such as soft robots.

View Article and Find Full Text PDF

Invoking Hybrid-Ion Correlation Electrochemistry to Enable Optimal Aqueous Zn-Ion Batteries.

Adv Mater

July 2025

State Key Laboratory of Materials for Advanced Nuclear Energy & School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China.

As a generation beyond conventional batteries based on mono-/poly-valent ions, hybrid-ion batteries (HIBs) offer more opportunities to build battery prototypes because they utilize the merits of multiple ions. However, the limited understanding of ionic correlations in these heterogeneous systems experimentally and theoretically brings a great challenge in exploring their performance limits. Here, an approach is proposed combining electrochemical phase-field simulation with thermodynamic calculation, where ionic correlation in the electrolyte and electrode is addressed using the linearized Poisson-Boltzmann equation embedded with Debye-Hückel theory and ion-occupied sub-lattice model, to invoke the ionic electrodeposition and (de)intercalation advantages.

View Article and Find Full Text PDF

Introduction: This study investigates how environmental restorativeness perception and cultural identity shape the relationship between red tourism experience and post-visit behavioral intentions.

Methods: A structured questionnaire was administered to 1,195 tourists at two iconic red tourism destinations in China, Xibaipo and Shaoshan. Key constructs, including red tourism experience, environmental restorativeness perception, cultural identity, and post-visit behavioral intentions, were assessed using validated multi-item scales.

View Article and Find Full Text PDF

Near infrared light driven nanocatalyst with hole-mediated GSH-depletion for augmented memory therapy.

J Mater Chem B

July 2025

Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, China.

Photocatalytic therapy holds promise as a non-invasive approach for tumor treatment and is currently under active development. However, its effectiveness relies on continuous laser radiation, which can limit its practical application. To overcome this challenge, we designed a novel composite photocatalyst composed of SnO nanoparticles strategically decorated on CuO nanospheres.

View Article and Find Full Text PDF

A visible-light-induced copper catalysis radical relay reaction of ,-disubstituted allylic alcohols with sulfonium salts is described. The established protocol provides facile access to distal keto thioether derivatives radical C-S bond cleavage and a 1,2-aryl migration relay strategy. A synthetic application of the product was achieved through a simple reduction or oxidation for the preparation of value-added compounds, including alcohols, sulfoxide, and sulfone-substituted thioether derivatives.

View Article and Find Full Text PDF

1,2,4-Thiadiazoles, an important five-membered heterocyclic ring containing nitrogen and sulfur, are widely present in various functional molecules. Hence, a facile electrochemical three-component reaction of isocyanides, elemental sulfur, and amidines is reported for the construction of 1,2,4-thiadiazoles. A series of 5-amino-1,2,4-thiadiazoles are prepared in a simple undivided cell at room temperature with good functional group tolerance and high atom economy.

View Article and Find Full Text PDF

Many organizations are unable to leverage the benefits of external hires due to the latter's deviant behaviors. Drawing on person-environment fit and trait activation theories alongside goal orientation and dark triad personality research, we hypothesized and tested a conceptual model elucidating the mechanisms underlying deviant behaviors in this unique context. Our study, based on data from 236 external hires and their supervisors, reveals that these hires exhibit deviant behaviors when they experience a misalignment between their personal traits and the organizational environment.

View Article and Find Full Text PDF

Compared to the high-risk hazards of explosive blasting, liquid carbon dioxide phase transition fracturing technology, as a new technology, can be used as a supplementary method that is not suitable for explosive blasting sites. Liquid carbon dioxide phase transition fracturing blasting is different from explosive blasting; for the application of liquid carbon dioxide phase transition fracturing blasting in the process of rock excavation, there is still a lack of research on the vibration effect of terrain on the topographic propagation law of vibration wave, so it is of certain significance to study the vibration wave propagation rule of liquid carbon dioxide phase transition fracturing blasting under different terrain conditions. The study on the terrain propagation law of vibration waves in liquid carbon dioxide phase change fracturing blasting was carried out.

View Article and Find Full Text PDF

With the advancement of industrial digitization, utilizing large datasets for model training to boost performance is a pivotal technical approach for industry progress. However, raw training datasets often contain abundant redundant features, which increase model training's computational cost and impair generalization ability. To tackle this, this study proposes the bionic ABCCOA algorithm, an enhanced version of the bionic Coati Optimization Algorithm (COA), to improve redundant feature elimination in datasets.

View Article and Find Full Text PDF

Spectroscopic measurement of near-infrared soil pH parameters based on GhostNet-CBAM.

PLoS One

June 2025

Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, Yueyang, Hunan Province, China.

Soil pH is an important parameter that affects plant nutrient uptake and biological activity and has received extensive attention and research. In this paper, we propose a neural network algorithm using Ghostnet combined with Convolutional Block Attention Module (CABM) to realize the near-infrared (NIR) PH spectral measurement of soil. The method firstly utilizes Monte Carlo Cross Validation (MCCV) method to reject the anomalous samples in the data, and then uses GhostNet combined with CBAM algorithm to train and predict the PH values of the four Lucas soil spectral data measured by the two different methods, and compares the prediction results with those of PLSR and VGGNet-16 methods.

View Article and Find Full Text PDF

Although the reactions of electrophilic Fischer-type metal siloxycarbenes catalytically generated in situ from acylsilanes with a single nucleophile have been documented, the coupling of acylsilanes with two nucleophiles remains unexplored. Herein, we demonstrate that acylsilanes can act as effective cationic carbyne equivalents under visible-light-driven copper catalysis, enabling their coupling with diverse indoles or electron-rich arenes. This strategy operates under mild, redox-neutral conditions and exhibits broad functional group compatibility.

View Article and Find Full Text PDF

Machine Learning-Assisted Spray Pyrolysis for the Synthesis of Single-Atom Fe-N-C Porous Hollow Microspheres for Zinc-Air Batteries.

ACS Appl Mater Interfaces

June 2025

Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China.

Non-noble metal single-atom catalysts with high catalytic activity have garnered considerable attention from researchers in recent years. Yet, their synthesis is affected by various factors, making process optimization a challenging and systematic task. In this study, single-atom Fe-N-C porous hollow microspheres were successfully synthesized via ultrasonic spray pyrolysis, with machine learning employed to optimize the fabrication process.

View Article and Find Full Text PDF

FeO is widely regarded as a promising anode for sodium-ion batteries (SIBs) due to its abundant availability, low cost and high theoretical capacity. However, its practical application is hindered by poor conductivity, significant volume change and slow reaction kinetics. In this work, a novel self-template assisted annealing strategy is proposed to synthesize N, S co-doped carbon wrapped FeO/FeS heterojunction (FeO/FeS@NSC).

View Article and Find Full Text PDF

In Situ Light-Modulation of Capacity and Impedance in Lithium-Ion Batteries.

Adv Sci (Weinh)

August 2025

International Iberian Nanotechnology Laboratory (INL), Braga, 4715-330, Portugal.

The in situ regulation of capacity and impedance presents a significant challenge that impedes the application of lithium-ion batteries (LIBs). Herein, a novel strategy is introduced that utilizes a broadband light-modulated method for in situ manipulation of cell capacities and impedances. This approach leverages a photoconductive heterojunction comprising cadmium sulfide (CdS) nanorod arrays and a reduced graphene oxide (rGO) film.

View Article and Find Full Text PDF

The development of green and efficient methods for the construction of -heterocyclic frameworks has attracted considerable attention in organic synthesis. In this work, an electrochemical oxidative cyclization of primary amines for the synthesis of benzimidazole, benzothiazole, quinazolinone, and quinoxaline has been developed. This catalyst- and oxidant-free strategy demonstrates good functional group tolerance, up to 87% yield of N-based heterocycles in an electrochemical undivided cell under open-air conditions and is easy to scale up.

View Article and Find Full Text PDF

There is an urgent need to develop innovative materials for the high-efficiency and selective recovery of gold from electronic waste. In this work, we pioneer a novel amorphous chromium-glyoxal bis-(2-hydroxyanil) coordination polymer (Cr-GBHA aCPs) through rational molecular engineering of metal-organic coordination systems. Distinguished from conventional crystalline adsorbents, the deliberately designed amorphous architecture enables unprecedented exposure of multifunctional active sites, achieving gold adsorption capacity of up to 4242 mg/g at 55 °C.

View Article and Find Full Text PDF

The exploration of high-performance, low-cost, and dual-function electrodes is crucial for anion exchange membrane water electrolysis (AEMWE) to meet the relentless demand for green H production. In this study, a heteroatom-doped carbon-cage-supported CoSe@MoSe@NC catalyst with a formicarium structure has been fabricated using a scalable one-step selenization strategy. The component-refined bifunctional catalyst exhibited minimal overpotential values of 116 mV and 283 mV at 10 mA cm in 1 M KOH for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), respectively.

View Article and Find Full Text PDF

A novel electrochemical sensor for highly sensitive and selective detection of carbendazim (CBD) in food was proposed in this study. Initially, a three-dimensional carbon composite material (CCM) was formed by simultaneously modifying reduced graphene oxide and reduced graphene nanoribbons on the glassy carbon electrode (GCE) to enhance sensitivity and serve as a stable sensing platform. Then copper nanoparticles were electrodeposited on CCM/GCE, and cyclic voltammetry scanning was performed in potassium ferrocyanide solution to deposit copper-based Prussian blue analogue on CCM/GCE, further improving the sensitivity of the sensor while giving the ability to self-report.

View Article and Find Full Text PDF

A novel and efficient dual-catalysis strategy using nickel and palladium has been developed for the cross-coupling of halostibines with aryl triflates to form C(sp)-Sb bonds. This approach shows a wide substrate scope and high functional group tolerance and could be conducted on a gram scale. The synthesized arylstibines also could be arylation reagents reacting with alkyl and phenyl alkenes to form olefins and ligands to regulate the hydrogenation of diphenylacetylene.

View Article and Find Full Text PDF

Electrical stimulation (ES) therapy has emerged as a promising method for improving wound healing by mimicking the body's natural electric fields. However, traditional ES devices often fall short in practical applications due to their bulkiness and inefficiency. Current tools for electrical stimulation are hindered by issues such as poor sustainability, limited flexibility, and inadequate biocompatibility.

View Article and Find Full Text PDF