Microporous crystalline zeolite materials have large specific surface area, high hydrothermal stability, abundant and uniform micropores and adjustable surface properties, which exhibited promising applications in adsorption, catalysis, antibacteria, drug delivery and water treatment. Zeolite has strong cation exchange ability and the Ag in silver-loaded zeolites prepared by ion-exchange method mainly exists in the following three states: Ag⁺, silver nanoclusters and silver nanoparticles. Due to the biocompatibility of Ag⁺ and the efficient and adjustable luminescent performance of silver clusters, they have received wide attention in recent years. This article reviews the applications of silver-loaded zeolites prepared by ion-exchange method in white LEDs and tunable luminescent phosphors, sensors, antibacterial materials, adsorption and catalysis etc.

The composite of cobalt coated graphitic carbon nitride (g-C₃N₄) (Co@CNT) for electromagnetic wave (EMW) absorption was prepared via two-step process of co-deposition and calcination with graphitic carbon nitride (g-C₃N₄) and cobalt nitrate hexahydrate as raw materials. The optimal outstanding capacity of EMW absorption of the prepared Co@CNT can be realized through adjusting the Co content of Co@CNTs. The microstructure and phase composition of Co@CNT were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM) with Energy Disperse Spectroscopy (EDS) and transmission electron microscopy (TEM). The electromagnetic parameters and reflection loss (RL) of the composite were measured by vector network analyzer and then the reflection loss diagram is acquired by MATLAB simulation. The results show that EMW absorption performance of Co@CNT-1 is the best when it is mixed with paraffin (mass ratio 1:3). The maximum effective absorption bandwidth (RL<-10 dB) is 4.42 GHz, while the minimum reflection loss (RL_min) is up to -45.5 dB, which were measured with a hollow ring of 7 mm in outer diameter and 1.5 mm in thickness.

The polyacrylonitrile (PAN) three-dimensional nanofibers were prepared by electrospinning and liquid phase receiving technique, and then the ultra-light carbon nanofiber aerogels (CNFAs) with excellent mechanical properties were obtained by post thermal stabilizing the nanofibers. There exists a network of open holes formed by overlapping carbon nanofibers inside the CNFAs, which can bounce back to its original shape after 80% strain. The water contact angle of CNFAs increased to 145^o after hydrophobic treatment via vapor depositionof polydimethylsiloxane (PDMS). The effect of the original bulk density of electro-spun nanofibers on the volume shrinkage, density, oil absorption capacity and cyclic adsorption capacity of CNFAs was assessed. The results show that 4 mg·mL^-1 is a more appropriate initial bulk density, and the adsorption capacity of CNFAs for oil pollutants can reach 185 times of its own weight. The CNFAs of saturated absorption could be recovered by direct combustion or extrusion, and even after 10 cycles of combustion recovery, the adsorption capacity of the recovered CNFAs could remain by a rather stable level.

Three kinds of samples with different scratch depths on the surface of alloy 690TT for heat exchanger tubes are prepared. The microstructure changes caused by scratch and the effect of scratches on the corrosion and SCC behavior were systematically investigated. The results show that severe plastic deformation occurred near the scratch bank and the scratched groove. A large number of sliding steps and tear deformation generated near the scratched bank. The scratch depth had no obvious influence on the morphology, composition and distribution of corrosion products in different areas of scratches. As the scratch depth increased both the number and the length of SCC cracks increased, indicating that the SCC sensitivity of the material increased. Defects such as slip steps and micro cracks produced during the scratching process were likely to be the preferential positions of SCC initiation.

Mg-rich Mg₃Bi₂ thin films were prepared by magnetron sputtering with dual targets of Mg-Bi intermetallic compound and metal Mg. The phase composition, surface and cross-sectional morphology as well as thermoelectric properties of the thin films were characterized. The results show that the Mg-rich thin film is composed of phases Mg₃Bi₂ phase and Mg. There exists Mg vacancies within the phase Mg₃Bi₂, therefore, which presents characteristics of p-type conductivity with a positive Seebeck coefficient. With the increase of temperature, the resistance of Mg-rich Mg₃Bi₂ films increases slightly at first and then decreases significantly. With the increase of Mg content, the resistivity of Mg-rich Mg₃Bi₂ films gradually increases, but when the Mg content reaches a certain value, the resistivity drops sharply. When the Mg content was low, the Seebeck coefficient first decreased slightly and then increased rapidly with the increase of temperature, and then decreased rapidly after reaching the maximum value. When the Mg content was high, the Seebeck coefficient increased slightly at first and then decreased slowly with the increase of temperature. Except for the samples with low Mg content, the Seebeck coefficient of the films increases with the increase of Mg content at the same temperature, but the Seebeck coefficient decreases rapidly when the Mg content is too high, reaching more or less a level of the same order of magnitude of the Seebeck coefficient of common metal materials. Nevertheless, the power factor of this Mg-rich Mg₃Bi₂ film is controlled by the Seebeck coefficient and the resistivity.

The flame retardant poly (p-methoxy phenoxy phosphate) -4,4 '-dihydroxy biphenyl ester (PMP) was prepared by reaction process with 4-methoxy phenol and phosphorus trichloride as raw materials and its structure was characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (¹H-NMR,¹³C-NMR,³¹P-NMR). Its carbon residue after calcination was measured by X-ray photoelectron spectroscopy (XPS). Further, the composite of PMP/APP/VER was fabricated with vinyl ester resin (VER) as raw material and the compound of ammonium polyphosphate (APP) and flame retardant PMP as modifier. The flame retardancy and thermal stability of the prepared composite was investigated by means of thermogravimetric analysis (TGA), limiting oxygen index (LOI) and vertical combustion (UL-94). The results show that the PMP/APP/VER composite with 15% PMP/APP could be rated as grade V-1 corresponding to the UL-94 test. When the composite with 20% PMP/APP, its LOI value reached 25.0%, and carbon residue was 34.6% after calcined at 700℃, which was 3.72 times that of the bare VER. These results demonstrate that PMP/APP can significantly improve the flame retardant performance and thermal stability of VER matrix.

Cu_(47.8－x)Zr_46.2Al₆Fe_x (x=0, 0.8, 1.2, 1.6) alloy were prepared by copper-mold injection casting method and the effect of Fe microalloying on the glass-forming ability and mechanical properties of Cu_(47.8－x)Zr_46.2Al₆Fe_x (x=0, 0.8, 1.2, 1.6) metallic glasses were investigated. The results show that the glass-forming ability of the alloy decreases with increasing of Fe content, while the plastic deformation ability at room temperature increases obviously. It is found that with the increase of minor Fe content more free volume will be introduced into the glassy matrix, and the inhomogeneity of composition and free volume distribution in the matrix will increase as a result of the positive mixing enthalpy of Fe and Cu. These factors jointly result in enhanced plasticity of metallic glass with high Fe content.

The thermal simulation test of an experimental aseismic high strength steel was conducted by Gleeble-3800 thermal simulator, then its microstructure, second phase, mechanical properties and fracture morphology were characterized by metallographic microscopy (OM), field emission scanning electron microscopy (SEM), high resolution transmission electron microscopy (TEM) and universal tensile testing machine. Meanwhile, the effect of final temperature of cooling on the microstructure and properties of the steel was carefully examined, and the grain refinement mechanism induced by microalloying elements was revealed. The results show that: the microstructure of the steel consists mainly of phases ferrite and pearlite, and the ferrite grain was refined with the decrease of the final temperature of cooling. The average diameter of precipitated carbides (Nb, Ti, V) C and (V, Nb, Ti) C distributed in the ferrite matrix of the steel is about 2 nm and 5 nm respectively for the final temperature of cooling 650℃. The tensile strength and yield strength of the steel increase with the decrease of the final temperature of cooling. When the final temperature of cooling is 650℃, the corresponding tensile strength and yield strength are 638.75 MPa and 467 MPa, respectively, and the strength/yield ratio is 1.37. The tensile fractured surface of steels, which have been experienced thermal simulation tests with different final temperatures of cooling, exhibits mainly equiaxed dimples of different sizes and depths.

Zr-based metal-organic frameworks (MOFs) UIO-66-NH₂ was modified with methacrylate anhydride, and then the modified MOFs were deposited onto polypropylene (PP) nonwoven fabric while real-time curing assisted by UV irradiation to prepare composite of MOFS/nonwoven fabric (PSP). The changes of crystal form and morphology of UIO-66-NH₂ before and after modification were analyzed, and the binding fastness of MOFs (UIO-66-NH2-MET) to PP nonwovens was examined, and the effect of adsorption conditions on the adsorption properties of PSP composite was investigated. The results show that UIO-66-NH2-MET could be prepared through modifying the UIO-66-NH2 structure with methacrylate anhydride group. After modification, the crystal structure of MOFs remained unchanged and the original frame structure was retained. UIO-66-NH2-MET has good fastness on PP nonwovens. No mass loss occurred after repeated washing, and the PSP composite retained good adsorption effect. The optimum conditions for PSP composites to adsorb methylene blue (MB) are as follows: The initial concentration of the dye was 50 mg/L, the adsorption time was 300 min, and the pH value was 9.

The antibacterial property and in vitro biocompatibility of a novel Ti-Zr-Cu alloy were investigated. Meanwhile, the number of bacterial colonies on the surface of Ti-Zr-Cu alloy was determined by plate co-culture method, and the morphology of nuclear and cytoskeleton, cell apoptosis and adhesion ability on Ti-Zr-Cu alloy were assessed by means of CCK8 cell proliferation detection and phyllopeptide cell staining observation. The results show that the density of bacterial colonies on the blank sample and Ti-Zr alloy surface was very high, while the number of bacterial colonies on the Ti-Zr-Cu alloy surface was very low. The antibacterial rate of Ti-Zr-Cu alloy against Staphylococcus aureus and Escherichia coli reached 98.28% and 97.67%, respectively, showing excellent antibacterial properties. The relative productivity of MC3T3-E1 cultured on Ti-Zr-Cu alloy surface for 1, 4 and 7 days were 168.8%, 109.8% and 106.5%, respectively, which were all higher than 100%, indicating that this alloy had no cytotoxicity. The adhesion and spread of cells on the surface of Ti-Zr-Cu alloy are good, which is conducive to the adhesion and further growth of adherent cells on the surface of Ti-Zr-Cu alloy, indicating that Ti-Zr-Cu alloy has good biocompatibility. Ti-Zr-Cu alloy had no adverse effect on cell apoptosis. The SEM images of the cells on the surface of Ti-Zr-Cu alloy showed that the adhesion of the cells was normal, which also indicated that the cells had good biocompatibility.