Showing papers by "Jiangxi University of Science and Technology published in 2023"
TL;DR: In this article , a comprehensive review of pyrolysis, gasification, hydrothermal carbonization, liquidation, and torrefaction of kitchen waste is presented, as well as the bottleneck and future outlook of the above-mentioned techniques.
7 citations
TL;DR: In this paper , the effect of curvature on the performance of single-atom catalysts has been investigated, and the results show that tuning the curvature of graphene can effectively modulate the catalytic performance and stability.
3 citations
TL;DR: In this paper , a series of Er3+-Yb3+ co-doped La4Ti9O24 phosphors with high green color purity under 980 nm irradiation were developed.
2 citations
TL;DR: In this article , a highly efficient and thermal stable Cr3+ doped Lu2CaAl4SiO12 (LCAS) phosphor with broadband NIR emission covering phytochrome Pfr absorption range was successfully realized via Ca2+-Si4+ co-substitution of Lu3+-Al3+ pairs.
2 citations
TL;DR: In this article , a strategy for synthesizing KSF-MLG-P red luminescence phosphor (KSFMLG = K2SiF6:0.05 Mn4+, 0.04Li+@GQDs (6 mg/ mol), P = passivation, GQDs = graphene quantum dots) is proposed with an incorporation of hydrogen peroxide solution-free hydrothermal synthesis, hydro-thermal coating and surface passivation methods.
1 citations
TL;DR: In this paper , the critical parameters including critical temperature, critical pressure, critical densities, and mole fraction for the binary mixture of R744 (carbon dioxide) + R1234yf (2,3, 3,3-tetrafluoropro-1-ene) mixture were measured using a metal-bellows variable volumeter.
1 citations
16 Apr 2023
TL;DR: In this paper , a facile post-treatment strategy utilizing methylhydrazine iodide (MHyI) to passivate the surface of the perovskite film was demonstrated.
Abstract: Organic-inorganic hybrid perovskites are highly efficient in photovoltaic applications, making the commercialization of perovskite solar cells (PSCs) possible. However, the high density of defects on the surface significantly affects the performance of PSCs. To address this issue, we have demonstrated a facile post-treatment strategy utilizing methylhydrazine iodide (MHyI) to passivate the surface of the perovskite film. MHyI could co-ordinate with the dangling bonds on the surface of perovskite films, effectively passivating defects in the film and suppressing carrier non-radiative recombination. As a result, PSCs with MHyI modification exhibit a champion power conversion efficiency (PCE) of 23.19% and a high open-circuit voltage (VOC) of 1.14 V (0.43 V voltage deficit). Moreover, unencapsulated solar cells maintain their initial efficiency of 88% after 30 days of exposure to ambient air with 30% humidity, and the devices with encapsulation retained 57% of their initial efficiency after 200 h of maximum power point (MPP) loading under constant light irradiation in ambient air. Overall, our results provide a facile method for improving the performance and stability of PSCs.
1 citations
TL;DR: In this article , a ferroelectric two-dimensional (2D) perovskite based on pyridine heterocyclic ring as the organic interlayer has been designed to solve the problem of insufficient exciton dissociation.
Abstract: Despite the great progress of flexible perovskite solar cells (f-PSCs), it still faces several challenges during the homogeneous fabrication of high-quality perovskite thin films, and overcoming the insufficient exciton dissociation. To the ends, we rationally design the ferroelectric two-dimensional (2D) perovskite based on pyridine heterocyclic ring as the organic interlayer. We uncover that incorporation of the ferroelectric 2D material into 3D perovskite induces an increased built-in electric field (BEF), which enhances the exciton dissociation efficiency in the device. Moreover, the 2D seeds could assist the 3D crystallization by forming more homogeneous and highly-oriented perovskite crystals. As a result, an impressive power conversion efficiency (PCE) over 23 % has been achieved by the f-PSCs with outstanding ambient stability. Moreover, the piezo/ferroelectric 2D perovskite intrigues a decreased hole transport barriers at the ITO/perovskite interface under tensile stress, which opens new possibilities for developing highly-efficient f-PSCs.
1 citations
TL;DR: In this article , the structure, electronic, optical and photoelectric properties of WX2 (S, Se, Te) monolayer and their heterostructures are studied by the first principles calculation.
1 citations
TL;DR: In this article , a cross-coupling contour adaptive nonsingular terminal sliding mode control (CCCANTSMC) is proposed to achieve accurate contour tracking of robotic manipulators.
Abstract: Abstract To achieve accurate contour tracking of robotic manipulators with system uncertainties, external disturbance and actuator faults, a cross-coupling contour adaptive nonsingular terminal sliding mode control (CCCANTSMC) is proposed. A nonsingular terminal sliding mode manifold is developed which eliminates the singularity completely. In order to avoid the demand of the prior knowledge of system uncertainties, external disturbance and actuator faults in practical applications, an adaptive tuning approach is proposed. The stability of the proposed control strategy is demonstrated by the finite-time stability theory. Then, the developed controller combines adaptive nonlinear terminal sliding mode control (ANTSMC) of joint trajectory tracking and proportion–differentiation control of end-effector contour tracking by introducing the coupling factor between multiple axes based on Jacobian. Moreover, a unified framework of cross-coupling contour compensation and reference position pre-compensation is built. Finally, numerical simulation and experimental results validate the effectiveness of the proposed control strategy.
1 citations
TL;DR: In this paper , the effect of grain size in diffusion matrix on the grain boundary diffusion mechanism of Tb element is investigated intensively, and the results show that with only 0.75 wt. % TbF3 diffusion, the intrinsic coercivity increases by 8.83 kOe for the magnet with finer average grain size, while the increase for coarse-grain magnet is only about 6.99 k Oe.
01 Feb 2023
TL;DR: An innovative droplet-based aerosol jet printing procedure has been developed for the creation of prominently luminescent patterns of europium-doped yttrium oxide (Y2O3:Eu3+) inorganic phosphors in case of a rather low calcining temperature as discussed by the authors .
Abstract: Flexible techniques for producing luminescent patterns with high-resolution and moderate efficiency at the microscale are potentially important for pattern display, customized anti-counterfeiting and data security. An innovative droplet-based aerosol jet printing procedure has been developed for the creation of prominently luminescent patterns of europium-doped yttrium oxide (Y2O3:Eu3+) inorganic phosphors in case of a rather low calcining temperature. Microscale luminescent patterns of pomegranate-shaped Y2O3:Eu3+ nanospheres were effectively created by synchronizing the droplet deposition behavior and the microreactions therein. The deposition temperature was crucial to the pattern development accompanying a morphological transformation from dense film to spherical nanostructures by providing an anisotropic evaporation regime. The red emission of the printed luminescent patterns was nearly identical to that of the equivalents calcined at 1000 °C, indicating the possibility for future applications in flat panel display systems.
TL;DR: In this paper , surface nanocrystalline layers were prepared on Cu-8Cr alloy using ultrasonic shot peening (USSP) technique by controlling the pellet size and shot-peening time.
Abstract: Abstract Surface nanocrystalline layers were prepared on Cu-8Cr alloy using ultrasonic shot peening (USSP) technique by controlling the pellet size and shot peening time. The tissue morphology, microstructure, surface hardness, surface strength and corrosion resistance of the generated surface nanolayers were systematically characterized using x-ray diffractometer (XRD) and scanning electron microscope (SEM) test methods, respectively. The results showed that the USSP treatment did not change the surface phase of Cu-8Cr alloy, but only refined the surface grains into nanocrystals. The pellet size and shot peening time had a large effect on the surface properties of Cu-8Cr alloy. The best overall surface properties were obtained with a shot size of 2 mm and a shot time of 30 min. The average grain size of the nano-layer was about 66 nm, the surface hardness was increased to 126.69 HV0.05, the tensile strength reached 417 MPa, and the corrosion resistance of the alloy was significantly enhanced. The USSP treatment provides a new method for the preparation of CuCr alloys with excellent surface properties.
TL;DR: In this paper , an early warning system for landslide risks on the basis of the real-time monitoring of water level is proposed, where a self-designed landslide early warning model is embedded.
Abstract: During the in situ leaching process of ion-adsorption rare earths, leaching solution needs to be constantly injected to the mine slopes. As a consequence, landslides are highly likely to occur due to the increasing water level of soil mass. To solve this problem, we conducted a mechanical analysis on the rising water level after solution injection, which shed light on the mechanical principle of slope instability brought about by rising water level. With water level variation as the major factor, we established an early warning system for landslide risks on the basis of the real-time monitoring of water level. Within the system, a self-designed landslide early warning model is embedded. In addition to monitoring the water level variation in slopes, this system can be employed for real-time data processing. With the integration of early warning model algorithm, the real-time graded early warning of slope landslide risks is achieved within the mining process of ion-adsorption rare earths. By discussing the real-time monitoring method, framework of landslide early warning system, FIFC landslide early warning model, optimization method of water level, and selection of landslide-inducing factors, this research provides an effective solution to the landslide early warning within the mining process of ion-adsorption rare earth minerals. Thus, it can be employed as a favorable reference for other types of early warning systems.
TL;DR: In this paper , Na+-doped Sr4Al14O25:Mn4+ (SAO-Na,Mn) series oxide red phosphors effectively excited by blue chips were successfully prepared.
TL;DR: In this paper , the effects of low-intensity ultrasound on the anammox granular sludge structure and functional bacteria metabolism were studied, and the results showed that under optimal ultrasound parameters, the activity of Nar, NirS, and HZO was increased by 43.98 %, 17.92 %, and 16.49 %.
Abstract: Low-intensity ultrasound can effectively shorten the start-up time of the anaerobic ammonia oxidation process and improve nitrogen removal performance. However, the effect of low-intensity ultrasound on the anammox granular sludge structure and the functional bacteria metabolism is still unclear. Herein, the effects of ultrasonic irradiation with different ultrasonic power densities and treatment times on nitrogen removal performance and anammox granular sludge structure were studied. The activity of anammox granular sludge increased by 20.81 % after irradiation (0.2 W/mL ultrasonic power density, 2 min treatment time). When further increased to 0.3 W/mL or 4 min, respectively, sludge activity was inhibited. Under optimal ultrasound parameters, the activity of Nar, NirS, and HZO was increased by 43.98 %, 17.92 %, and 16.49 %, respectively, and the cell membranes permeability was improved. Extracellular polymers and cell cluster shedding improved the mass transfer performance. Excessive ultrasonic energy lead to cell membrane damage or cell rupture.
TL;DR: In this paper , a new low-dimensional cadmium-based hybrid metal halide multifunctional material with high temperature reversible phase transition is reported, named CH2CH3)3NCH2Cl]2CdBr4 (1).
TL;DR: In this paper , the multilayer interfacial Cr/CrAlCN nanocomposite coating is successfully fabricated by the multi-arc ion technique, and its microstructures, corrosion and tribological performances are investigated systematically.
TL;DR: In this paper , a readily available precursor, letrozole, was selected, which could be converted into the dicarboxylic acid ligand by virtue of its angular structure, azole units and easily modified cyano groups.
01 Jan 2023
TL;DR: Zhang et al. as discussed by the authors used deep semantic segmentation models with DeepLab, U-Net, and Xception to obtain richer and more productive feature information from the mineral zone of Tabling's separation.
Abstract: Various segmentation algorithms for mineral zone images can only extract the boundary of the concentrate zone or the separation point of the mineral zone. To obtain fuller and more productive feature information from the mineral zone of Tabling’s separation, deep semantic segmentation models with DeepLab, U-net, and Xception are constructed. The image datasets of the industrial Tabling separation are collected and marked, and the corresponding mineral zone image dataset is constructed, the training and test sets are distributed in a certain proportion and imported into the deep semantic models for training. The training results of these models are compared, and the segmentation of the mineral zone images is evaluated. DeepLab-xception and DeepLab v3+ have the highest accuracy 0.9943 and mean intersection over the union value of 0.989. Finally, the DeepLab v3+ is adopted as the model for the image feature segmentation of Tabling’s mineral zone. Through the corresponding image processing and feature extraction operators, the effective multi-scale features of Tabling’s mineral zone can be well extracted.
TL;DR: In this article , the authors synthesized Cu nanoparticles encapsulated with nitrogen-doped carbon ([email protected]) as an excellent and durable catalyst for oxygen reduction reaction (ORR).
TL;DR: In this article , the magnetic transition at Curie temperature TC, was observed as first order for DyCo2 but second order for Mn doped compounds, and a detailed critical exponents analysis was carried out on these transitions: critical exponent β ≈ 0.5, γ ≈ 1.0, and δ ≈ 3.0.
TL;DR: In this paper , an experimentally validated CFD-DEM model is adopted to investigate the dynamics, microstructure and thermochemical behaviours in the raceway of a BF with hydrogen injection operations, which include raceway evolution, force distribution and the co-combustion characteristics of hydrogen and coke.
TL;DR: In this paper , an optimal humidity-responsive actuators of MXene were developed by designing topologies of heterostructured membrane of stacked nanosheets and 3D wrinkled MXene (3D-MXene).
Abstract: Abstract Intelligent actuators offer a lot of potential for use in soft robots, artificial muscles, sensors since it can alter shape in response to external stimuli. However, the stiffness of the material and the constrained specific surface area brought on by the dense stacking of materials restrict the response of the conventional humidity-responsive actuators. Herein, optimal humidity-responsive actuators of MXene were developed by designing topologies of heterostructured membrane of stacked nanosheets and 3D wrinkled MXene (3D-MXene). In this configuration, the stacked MXene nanosheets sustain the device’s overall strength, while the 3D-MXene layer significantly improves the device’s moisture absorption and decreases its stiffness. Importantly, the actuators have been strengthened due to the van der Waals forces at the interface of the stacked nanosheets and 3D-MXene. The fabricated MXene/3D-MXene actuator has exhibited remarkable response speed and deformation ability, obviously superior to any previously reported humidity-responsive actuators. By combining excellent electrical conductivity, the developed actuators demonstrated rapid response for electrical switches. This work highlights the significant potential for developing high performance responsive actuators by designing heterostructured configurations for applications in intelligent switches, soft robotics and synthetic muscles.
TL;DR: In this paper , a facile in situ polymerization of 1,3-dioxolane electrolytes was reported to fabricate integrated solid-state lithium batteries. But the authors did not consider the performance of the battery.
Abstract: Solid-state lithium batteries are promising and safe energy storage devices for mobile electronics and electric vehicles. In this work, we report a facile in situ polymerization of 1,3-dioxolane electrolytes to fabricate integrated solid-state lithium batteries. The in situ polymerization and formation of solid-state dioxolane electrolytes on interconnected carbon nanotubes (CNTs) and active materials is the key to realizing a high-performance battery with excellent interfacial contact among CNTs, active materials and electrolytes. Therefore, the electrodes could be tightly integrated into batteries through the CNTs and electrolyte. Electrons/ions enable full access to active materials in the whole electrode. Electrodes with a low resistance of 4.5 Ω □−1 and high lithium-ion diffusion efficiency of 2.5×10−11 cm2 s−1 can significantly improve the electrochemical kinetics. Subsequently, the batteries demonstrated high energy density, amazing charge/discharge rate and long cycle life.
TL;DR: Peng et al. as discussed by the authors observed the synergetic effect of magnetism, dielectricity and fluorescence near room temperature in a molecule, which well represents the strong interrelation between the light, electricity, magnetism and heat.
Abstract: Light, electricity, magnetism, and heat are manifestations of energy that are strongly interrelated and can be converted into each other under certain conditions. The molecular complex (C5NH13Cl)2MnBr4 shows a structural phase transition near room temperature that further induces the switchable magnetic properties, dielectric anomalies and fluorescent response over the same range of temperature. This is the first observation of the synergetic effect of magnetism, dielectricity and fluorescence near room temperature in a molecule, which well represents the strong interrelation between the light, electricity, magnetism, and heat. More information can be found in the Research Article by Y. Peng, Y. Song, Z.-B. Hu and co-workers (DOI: 10.1002/chem.202300598).