Showing papers by "Xiamen University published in 2023"
TL;DR: In this paper , a nonmetal two-dimensional carbon nitride (2D-CN) with different thickness is constructed via the facile hydrothermal (adjusting the solution pH to 4.0, 7.0 and 10.0) and calcination method.
19 citations
TL;DR: Pereira et al. as discussed by the authors showed that a mechanosensor of Aβ fibril stiffness in microglia, Piezo1, represents a potential therapeutic target for AD.
11 citations
TL;DR: In this paper , the authors discuss the recent progress in the development of air-stable, electrochemically stable, and cost-effective NaxTMO2, with an emphasis on the cost, large-scale fabrication capability, and electrochemical performance.
Abstract: ConspectusLithium-ion batteries (LIBs) are ubiquitous in all modern portable electronic devices such as mobile phones and laptops as well as for powering hybrid electric vehicles and other large-scale devices. Sodium-ion batteries (NIBs), which possess a similar cell configuration and working mechanism, have already been proven as ideal alternatives for large-scale energy storage systems. The advantages of NIBs are as follows. First, sodium resources are abundantly distributed in the earth's crust. Second, high-performance NIB cathode materials can be fabricated by using solely inexpensive and noncritical transition metals such as manganese and iron, which further reduces the cost of the required raw materials. Recently, the unprecedented demand for lithium and other critical minerals has driven the cost of these primary raw materials (which are utilized in LIBs) to a historic high and thus triggered the commercialization of NIBs.Sodium layered transition metal oxides (NaxTMO2, TM = transition metal/s), such as Mn-based sodium layered oxides, represent an important family of cathode materials with the potential to reduce costs, increase energy density and cycling stability, and improve the safety of NIBs for large-scale energy storage. However, these layered oxides face several key challenges, including irreversible phase transformations during cycling, poor air stability, complex charge-compensation mechanisms, and relatively high cost of the full cell compared to LiFePO4-based LIBs. Our work has focused on the techno-economic analysis, the degradation mechanism of NaxTMO2 upon cycling and air exposure, and the development of effective strategies to improve their electrochemical performances and air stability. Correlating structure-performance relationships and establishing general design strategies of NaxTMO2 must be considered for the commercialization of NIBs.In this Account, we discuss the recent progress in the development of air-stable, electrochemically stable, and cost-effective NaxTMO2. The favorable redox-active cations for NaxTMO2 are emphasized in terms of abundance, cost, supply, and energy density. Different working mechanisms related to NaxTMO2 are summarized, including the electrochemical reversibility, the main structural transformations during the charge and discharge processes, and the charge-compensation mechanisms that accompany the (de)intercalation of Na+ ions, followed by discussions to improve the stability toward ambient air and upon cycling. Then the techno-economics are presented, with an emphasis on cathodes with different chemical compositions, cost breakdown of battery packs, and Na deficiency, factors that are critical to the large-scale implementation. Finally, this Account concludes with an overview of the remaining challenges and new opportunities concerning the practical applications of NaxTMO2, with an emphasis on the cost, large-scale fabrication capability, and electrochemical performance.
10 citations
TL;DR: In this paper , a scraping technique was utilized to coat antifogging films on polyethylene substrate by using a solution containing polyvinyl alcohol, sodium alginate, and glycerin with suspended titanium dioxide nanoparticles.
9 citations
TL;DR: In this paper , the authors further developed the model of incomplete film Mg+ dissolution, explains many reported experimental phenomena, and clarifies misunderstandings of current mechanism, and deduced the evolution kinetics of hydrogen from Mg.
9 citations
TL;DR: In this article , Mo-activation of VC for better cocatalytic properties was proposed for the first time, aiming to attain improved hydrogen generation of CdS. This work provides a new insight to cocatalyst design and synthesis, thereby realizing economic alternatives to precious metal (Pt, Au, Ag) in solar-derived H2 production.
8 citations
01 Jan 2023
TL;DR: In this article , surface and lattice engineered Mo-modified Ru superstructures have been prepared with high performance for bifunctional hydrogen catalysis (HER and HOR) for the first time.
Abstract: Surface and lattice engineered Mo-modified Ru superstructures have been prepared with high performance for bifunctional hydrogen catalysis (HER and HOR).
8 citations
TL;DR: In this article , the applicability and performance of physico-chemical treatments for nutrient recovery from landfill leachate are reviewed, and recent progress and bottlenecks of nutrient recovery are identified.
Abstract: As nutrients shortage that will occur by the next decade could limit global fertilizer production, there are growing needs to recover macro-nutrients such as P and N from landfill leachate, which its generation and treatment have become global environmental issues. This work critically reviews the applicability and the performance of physico-chemical treatments for nutrient recovery from landfill leachate. This article also identifies recent progress and bottlenecks of nutrient recovery from landfill leachate, while providing an overview of how to apply a circular economy paradigm in the nexus of water–food–energy. Due to their ability to recover P and N from landfill leachate, specific attention is given to struvite precipitation, adsorption, and ammonium stripping. Their technological strengths and bottlenecks of each technique are evaluated based on a literature survey of 145 papers (1981–2022). By integrating anaerobic digestion and other nutrient recovery technologies, it is possible for water utilities to provide both renewable energy and nutrients, while contributing to a circular economy, global food security, and carbon neutrality. To attain a sustainable landfill management, the selection of appropriate technology for nutrient recovery from the liquid waste needs to consider the properties of waste stream, recovery performance, discharge standard, impacts, and cost-effectiveness. Overall, this work has consolidated new knowledge between technological development and demand-driven valorization.
8 citations
TL;DR: This paper found that the pandemic-led increases in WFH frequency are associated with a higher self-perceived hourly productivity among employed respondents, and the effect heterogeneity analysis identifies the role of crucial job-related characteristics in the baseline association.
5 citations
TL;DR: Inspired by human meniscus, a superhydrophobic inner pipeline coating with has been developed to mitigate the erosion and corrosion damages to gas transportation pipeline as discussed by the authors , consisting of modified TiO2 nanoparticles (NPs), multi-walled carbon nanotube (CNTs), and epoxy resin (EP).
5 citations
TL;DR: In this paper , a rapid and facile approach has been proposed to fabricate GA by a two-step reduction method, i.e., hydrothermal reduction by thiourea at a mild temperature of 95 °C for 30 min followed by microwave treatment for several seconds, c.a., 4-12 s.
TL;DR: In this paper , the authors explored the carbon emission scale, energy structure, and emission abatement cost in the path of carbon neutrality under different CCS penetration scenarios and showed that the emission abaton cost increases fast if only relying on the emission trading scheme (ETS).
TL;DR: In this article , a defect generation rate and elastic interaction are two key factors controlling dislocation loop evolution at different dose rates, and a schematical illustration is given to explain the different in loop density, size and spatial distribution caused by the combination of these two factors.
TL;DR: In this article , a novel Mg-Al LDH film was in-situ prepared hydrothermally in an alkaline aqueous solution on an Al-alloyed AZ31 substrate.
TL;DR: In this paper , two Ca/Mn/Fe perovskite oxygen carriers (i.e., CaMn0.5Fe0.25O3−δ and CaMmn 0.75Fe 0.5O3 −δ, respectively) were prepared using red mud and two pure reagents to recycle the red mud for the chemical looping combustion of biomass.
TL;DR: In this paper , a hexagonal boron nitride (h-BN)-supported Pd nanoparticles were used for the hydrogenation of aldehydes/ketones to alcohols with hydrogen spillover.
Abstract: Heterogeneous hydrogenation with hydrogen spillover has been demonstrated as an effective route to achieve high selectivity towards target products. More effort should be paid to understand the complicated correlation between the nature of supports and hydrogenation involving hydrogen spillover. Herein, we report the development of the hydrogenation system of hexagonal boron nitride (h-BN)-supported Pd nanoparticles for the hydrogenation of aldehydes/ketones to alcohols with hydrogen spillover. Nitrogen vacancies in h-BN determine the feasibility of hydrogen spillover from Pd to h-BN. The hydrogenation of aldehydes/ketones with hydrogen spillover from Pd proceeds on nitrogen vacancies on h-BN. The weak adsorption of alcohols to h-BN inhibits the deep hydrogenation of aldehydes/ketones, thus leading to high catalytic selectivity to alcohols. Moreover, the hydrogen spillover-based hydrogenation mechanism makes the catalyst system exhibit a high tolerance to CO poisoning.
TL;DR: In this article , the changes of hydrogen sulfide (H2S), its precursors, and microorganisms associated with its transformation during the composting process of kitchen waste were investigated.
TL;DR: In this paper , three different valence iron-based nanomaterials were synthesized and exposed to zebrafish embryos and mammalian cardiomyocytes, and the results showed that the valence state of the iron determines the ferroptosis potential.
TL;DR: In this paper , a scalable method has been developed to fabricate kilogram-scale graphite-Si-C/TiO2 composites (GSCT) consisted of Si nanoparticles tightly fixed on the micron graphite skeleton covered with a thin C/ TiO2 layer via liquid-phase self-assembly combined with mechanical fusion and solid-phase sintering treatment.
TL;DR: In this article , a set of TADF conjugated polymers with different number-average molecular weights (Mns) of 5.4, 24.8, 41.8 and 146.1 kg/mol are synthesized and their Mn effect on the photoluminescence (PL) and electroluminecence (EL) is systematically investigated.
TL;DR: In this article , ultrathin NiFeOOH nanosheets with abundant undercoordinated Fe active sites on a Ni foam electrode for OER were obtained via an electrochemically topologic transition process.
TL;DR: In this paper , a hybrid network, called HFCM-LSTM, is proposed to fully extract the original data information, making it more accurate to estimate the state of health (SOH) of battery, with different types and working conditions.
TL;DR: In this article , the authors used three molecular spectral imaging approaches, namely, Fourier transform infrared (FTIR), optical photothermal resonance infrared (O-PTIR), and confocal Raman spectral imaging, combined with chemometrics to characterize the presence of microplastics in corn flour.
TL;DR: In this article , the authors examined the PA treatment effect by designing a difference-in-differences technique between (2015) and (2018) and revealed that 47 African countries that ratified the PA together have reduced carbon emissions intensity (CE) by about 80.76% of the pledge.
TL;DR: In this paper , the authors demonstrate vertically aligned growth of zinc oxide (ZnO) nanorods array directly on polycrystalline copper paper through the pre-orientation with two-dimensional (2D) hexagonal boron nitride (h-BN) monolayer.
TL;DR: In this article , a system-level optimization of the on-chip transient thermal management (TTM) performance of a Bi2Te3-based TFTEC is performed using a transient three-dimensional numerical model.
TL;DR: In this article , the authors report the design and synthesis of three propeller-shape emitters via isomer engineering, which are named as TRZ-o-SDMAC, TRZm-SDMC, and TRZpSDMAC respectively.
TL;DR: In this article , a scalable/flexible [email protected] ([email protected]) membrane with excellent oxygen-permeability and moisture-proofing capability was employed to effectively shield Li anode and entire battery systems from H2O corrosion.
TL;DR: In this paper , a SuFExable vinyl monomer, 4-vinylbenzenesulfonyl fluoride (VBSF), is introduced, which shows a good balance of stability and reactivity and can readily undergo organocatalytic atom-transfer radical polymerization under visible light with good controls and high end-group fidelity.
Abstract: The advancement in the synthesis of functional polymeric materials has greatly benefited from the development of functionalized monomers and effective polymerization methods. Here, inspired by the controlled radical polymerization and the new generation of click chemistry, sulfur(VI) fluoride exchange (SuFEx), we introduce a SuFExable vinyl monomer, 4-vinylbenzenesulfonyl fluoride (VBSF), which shows a good balance of stability and reactivity and can readily undergo organocatalytic atom-transfer radical polymerization under visible light with good controls and high end-group fidelity, while retaining the sulfonyl fluoride groups intact. Moreover, poly(VBSF) can be further modified with high efficiency via SuFEx reactions with various aryl silyl ethers, thus allowing a rapid construction of a functional polymer library in a click fashion.
05 Feb 2023
TL;DR: Li et al. as discussed by the authors proposed Gang neurons to improve the neuron of ANNs by adding some dendritic modules with excellent properties to artificial neurons to form new neurons named Gang neurons, which showed excellent performance in various fields.
Abstract: <p>Artificial neural networks (ANNs) have won numerous contests in pattern recognition, machine learning, and artificial intelligence in recent years. The neuron of ANNs was designed by the stereotypical knowledge of biological neurons 70 years ago. Artificial Neuron is expressed as f(wx+b) or f(WX). This design does not consider dendrites’ information processing capacity. However, some recent studies show that biological dendrites participate in the pre-calculation of input data. Concretely, biological dendrites play a role in extracting the interaction information among inputs (features). Therefore, it may be time to improve the neuron of ANNs. In this study, some dendritic modules with excellent properties are proposed and added to artificial neurons to form new neurons named Gang neurons. E.g., The dendrite function can be expressed as Wi,i-1Ai-1 ○ A0|1|2|...|i-1 . The generalized new neuron can be expressed as f(W(Wi,i-1Ai-1 ○ A0|1|2|...|i-1)).The simplified new neuron be expressed as f(∑(WA ○ X)). After improving the neurons, many networks can be tried. This paper shows some basic architecture for reference in the future.<strong> Up to now, others and the author have applied Gang neurons to various fields, and Gang neurons show excellent performance in the corresponding fields.</strong></p> <p>Interesting things: (1) The computational complexity of dendrite modules (Wi,i-1Ai-1 ○ Ai-1) connected in series is far lower than Horner's method. Will this speed up the calculation of basic functions in computers? (2) The range of sight of animals has a gradient, but the convolution layer does not have this characteristic. This paper proposes receptive fields with a gradient. (3) The networks using Gang neurons can delete Fully-connected Layer. In other words, the parameters in Fully-connected Layers are assigned to a single neuron, which reduces the parameters of a network for the same mapping capacity. (4) ResDD(ResDD modules+One Linear module) can replace the current ANNs’ Neurons. ResDD has controllable precision for better generalization capability.</p> <p>Gang neuron code is available at https://github.com/liugang1234567/Gang-neuron.</p>