Impurity element doping is extensively taken as one of the most efficient strategies to regulate the electronic structure as well as the rate of photogenerated charge separation of photocatalysts. Herein, a one-pot hydrothermal synthesis process was exploited to obtain La-doped ZnIn₂S₄ microspheres, aiming at gaining insight into the role that doping ions played in the improvement of pollutant photodegradation. Systematical characterization means, comprising of X–ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis) diffuse reflection spectroscopy and Raman spectra, combination with high-resolution transmission electron microscopy (HRTEM), were employed to in depth reveal the concomitancy of La ions and ZnIn₂S₄ crystal lattice. The results showed that the La-doped ZnIn₂S₄ samples exhibited a slightly wider and stronger spectral absorption than pristine ZnIn₂S₄; and the specific surface area of doped ZnIn₂S₄ samples was a bit larger. The La-doped ZnIn₂S₄ electrodes showed improved photocurrent response, and the photocurrent density reached a maximum value at La content of 1.5 wt%. As expected, La-doped ZnIn₂S₄ samples exhibited a remarkable enhancement of photocatalytic behaviour toward the photodegradation of tetracycline hydrochloride (TCH) and methyl orange (MO). The prominently enhanced photoactivity of doped ZnIn₂S₄ samples was due to the synergistic effect of the elevated visible-light absorption ability and effective photogenerated charge carriers’ separation.

In the Fog Computer (FC), the process of data is prone to problems such as low data similarity and poor data tolerance. This paper proposes a hierarchical data job scheduling strategy Based on Intelligent Sensor-Cloud in Fog Computer (HDJS). HDJS dynamically adjusts the priority of the job to avoid job starvation and maximize the use of resources, uses the key frame to the resource occupied information, distributes the frame sequence to the unit, and then combines the intra frame distribution strategy to balance the load between the nodes. The experimental results show our proposed strategy may be possible to avoid the operation of hunger and resource fragmentation problems, make full use of the advantages of multi-core and multi-thread, improve system resource utilization, and shorten the execution time and response time.

To solve the pollution problem of electromagnetic waves, new electromagnetic shielding materials should meet the requirements of being lightweight with high electrical conductivity. In this work, the combination of silver (Ag) nanoparticles and nitrogen doping (N-doping) was expected to tune the electromagnetic and physical properties of Ti₃C₂T_x MXene, and the Ag@N-Ti₃C₂T_x composites were fabricated through the hydrothermal reactions. The nitrogen doped (N-doped) Ag@Ti₃C₂T_x composites showed a hollow structure with a pore size of 5 μm. The influence of N-doped degrees on the electromagnetic interference (EMI) shielding performance was investigated over 8–18 GHz. Therefore, the controlled N-doping composites exhibited reflection-based EMI shielding performance due to the electrical conductivity and the special three-dimensional (3D) honeycomb-like structure. The achieved average EMI shielding values were 52.38 dB at the X-band and 72.72 dB at the K_u-band. Overall, the Ag@N-Ti₃C₂T_x foam, due to its special 3D honeycomb-like structure, not only meets the characteristics of light weight, but also exhibits ultra-high-efficiency EMI shielding performance, revealing great prospects in the application of electromagnetic wave shielding field.

A cathode with single-crystal structure for Li-ion batteries is shown to provide stable cycle performance because of its integrated crystal structure and smaller internal stress. Here, Na ⁺ ions with larger radius are doped into LiNi _1/3 Co _1/3 Mn _1/3 O ₂ (LNCMO) single-crystal nanoparticles through a simple sol–gel method to further improve the rate capability. Different amounts of Na doping are considered to illustrate the cooperative effect of single-crystal structure and Na doping. The results indicate that a Li _0.9 Na _0.1 Ni _1/3 Co _1/3 Mn _1/3 O ₂ cathode has a discharge capacity of 193.7 mAh g ^–1 at 0.2 C, much higher than the 174.8 mAh g ^–1 of its undoped counterpart. After 50 cycles, the capacity retention is enhanced from 71.3% for undoped LNCMO to 89.2% for Li _0.9 Na _0.1 Ni _1/3 Co _1/3 Mn _1/3 O ₂ . At the same time, Li _0.9 Na _0.1 Ni _1/3 Co _1/3 Mn _1/3 O ₂ delivers a discharge capacity of 137.9 mAh g ^–1 at 10 C, about twice the capacity of LNCMO. Na ions doped into the lattice can magnify the distances between lithium layers and act as pins for more stable structure and faster kinetics of Li ⁺ -ion diffusion.

This paper presented an innovative method for fabrication of a porous Al₂O₃/CaAl₁₂O₁₉ ceramic membrane by combining emulsion method, cement curing and tape-casting technologies. The ceramic membrane featured a smooth surface and a porous internal structure. By adjusting the oil–water volume ratio from 1:1 to 4:1, the porosity of the samples increases from 45.6 to 67.3%, density decreases from 2.07 to 1.32 g/cm³ and bending strength decreases from 64.3 ± 1.2 to 31.7 ± 0.6 MPa. More significantly, the membranes showed great gas permeability (1.2 × 10⁷–2.3 × 10⁷ Lm⁻² h⁻¹ bar⁻¹), opening up a wide range of applications in the field of gas filtration processes.

The numerical solution of viscoelastic fluid problems in complex geometries and free solutions has been an area of extensive research in polymer fluid mechanics. The governing equation for polymer chains was in terms of Brownian dynamics and finitely extensible nonlinear elastic (FENE). Explicit and semi-implicit predictor-corrector algorithms were employed to solve the Brownian dynamics problem. After all the chain displacements have been determined, the stress tensor will be calculated with the ensemble average technique. Molecular configurations, such as the maximum length of the molecular chain along the flow direction, the angle between molecular chain and the flow direction, and the mean configuration thickness of the molecule in the velocity gradient direction, are also calculated. In the procedure, the governing equation of the displacement of chain has been made dimensionless.