NH₂-UIO-66 loaded MBT functionalized g-C₃N₄ nanosheets （UMC） are synthesized by a one-step solvothermal method. Added to water-based epoxy acrylate （WEP） emulsions，this new composite（UMC/WEP） is used as an anticorrosive agent to protect metal substrates. The release behavior of UMC corrosion inhibitor at different pH values has measured by UV spectroscopy，which shows that UMC has loaded about 14.2% （mass fraction，the same below） of MBT. UMC can be well dispersed in the waterborne epoxy-acrylate emulsion，and the SEM image of the coating cross-section shows that UMC has good compatibility with WEP. The anti-corrosion performance of composite coating and artificial scratch coating on Q235 carbon steel in 3.5% NaCl solution are evaluated by EIS，and the corrosion products are characterized by SEM-EDS. The results show that even after prolonged immersion （60 days） in the NaCl solution，the |Z _{0.01 Hz}| of UMC/WEP is still as high as 1.19×10¹⁰ Ω·cm²，which is 4 orders of magnitude higher than that of the WEP coating. SEM-EDS data exhibits that the metal surface protected by UMC/WEP coating has fewer corrosion products compared with the other three coatings，and the iron content in the corrosion products is the highest，up to 93.84%，while the oxygen and chlorine contents are as low as 6.00% and 0.16% respectively. After soaking in 3.5% NaCl solution for 48 h，the value of impedance and |Z _{0.01 Hz} | of UMC/WEP with artificial scratch is enhanced. In the early stage of immersion of UMC/WEP coating，the labyrinth barrier effect of g-C₃N₄ nanosheets plays a passive anti-corrosion function. In the later stage，when corrosion occurs，NH₂-UIO-66 releases MBT and Zr⁴⁺ in time to play an active anti-corrosion function. In addition，Zr⁴⁺ in NH₂-UIO-66 will compete with Fe³⁺ and Fe²⁺ for OH^-，forming a protective film，which also helps to slow down the corrosion of metal.

Two metal-organic frameworks （MOFs）， Ce-UiO-66， and Zr-UiO-66， are synthesized using cerium ammonium nitrate （Ce（NH₄）₂（NO₃）₆） and zirconium tetrachloride （ZrCl₄） as metal salts， and 1，4-benzenedicarboxylic acid （H₂BDC） as the organic linker. The crystal structure and morphology of the MOFs are characterized by powder X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The MOFs-modified functional separators are prepared by loading Ce-UiO-66 and Zr-UiO-66 onto one side of commercial Celgard PP separators via vacuum filtration. The electrochemical performance of lithium-sulfur batteries is assembled and tested. The results show that the Ce-UiO-66 modified separator batteries demonstrates optimal electrochemical performance. At a rate of 0.2 C， the initial discharge capacity reaches 1047 mAh·g^-1， with a capacity retention rate of 77.5% after 200 cycles and Coulombic efficiency approaching 100%. Under various current rates， the Ce-UiO-66 modified cells deliver discharge capacities of 1281， 945， 768.1， 673.2， 604.7 mAh·g^-1 at 0.1， 0.2， 0.5， 1， 2 C， respectively. When returning to 0.1 C， the capacity recovers to 951.6 mAh·g^-1 with a capacity retention rate of 74.3%. The above results demonstrate that the redox-active Ce₆-oxo clusters in Ce-UiO-66 can effectively catalyze the conversion reactions of lithium polysulfides （LiPSs） and enhance the redox kinetics. Furthermore， Ce-UiO-66 possesses abundant defects and unsaturated coordination sites， which can effectively anchor LiPSs， mitigate the shuttle effect， and further enhance the electrochemical performance of batteries.

The addition of a burning rate catalyst can affect the decomposition of oxidants and effectively regulate the burning rate of solid propellants. MOFs have aroused attentions due to their excellent properties in catalyzing the thermal decomposition of ammonium perchlorate （AP）， and existing research has mainly focused on changes in metal centers， without discussing the influence of ligands on the catalytic process. We prepare three types of Co-based complexes （Co-CP） catalysts using three different ligands （2-methylimidazole， terephthalic acid， and 1，2，4，5-phenylenetetramine） and discuss their effects on the thermal decomposition behavior of AP. The results indicate significant differences in the decomposition behavior of the three Co-CPs in AP due to differences in ligands. Co-ZIF can significantly reduce the decomposition temperature of AP while enhancing the heat release of the system. The relatively high thermal stability of Co-BDC affects the catalytic effect of AP thermal decomposition. Co-BTA can delay the low-temperature decomposition of AP by releasing NH₃ through ligand decomposition. The gas-phase products during the reaction process are captured through thermogravimetric infrared spectroscopy （TG-IR） testing， and the possible mechanisms of AP decomposition catalyzed by different Co-CPs are further explored and discussed. This study provides a design approach for a metal complex-based combustion rate catalyst.

To promote the large-scale commercial application of fuel cells， efficient， stable， and low-cost oxygen reduction reaction （ORR） catalysts should be developed. In this study， a Fe-doped ZIF-8 is used as the precursor， and the Fe-N-C non-precious metal catalyst is obtained by ball milling， calcination under a high-temperature argon atmosphere， pickling， and secondary calcination under an ammonia atmosphere. The results of various characterization methods show that Fe atoms are uniformly dispersed on the nitrogen-doped carbon framework， thus forming abundant Fe-N _x active sites. The electrochemical performance test results show that the Fe-N-C-5% catalyst with optimized preparation process and metal contents exhibits excellent ORR activity in 0.1 mol/L HClO₄ acidic solution， with a half-wave potential of 0.845 V. Meantime， it has good stability， and the half-wave potential does not drop significantly after 20000 cycles. These results provide an effective strategy for the rational design of precious metal-free ORR catalysts in the future.

To solve the problems in Fenton-like reactions， such as slow Fe³⁺/Fe²⁺ redox cycle， low electron transfer rate at the material interface， and high electron density of Fe³⁺ in Fe-MOFs， Fe-Cu bimetallic nitro-functionalized MOFs material （NMIL-88B-Cu-1） is synthesized by a one-step solvothermal method based on the principle of redox coupling reaction. The material is characterized and applied to effectively degrade Congo red （CR） in a Fenton-like process. The effects of different materials， H₂O₂ dosage， pH， CR concentration， and coexisting ions on the degradation of CR are investigated. The stability of materials is verified， and the catalytic degradation mechanism is proposed. The results show that when the molar percentage of Fe³⁺ and Cu²⁺ are both 50%， NMIL-88B-Cu-1 with hexagonal rod structure and mesoporous can be assembled on α-Fe₂O₃. When CR is 10 mg/L， pH value is 3-7， NMIL-88B-Cu-1 catalyst is 0.1 g/L， and H₂O₂ is 0.5 mol/L， CR can be rapidly and efficiently degraded in 15 min. The degradation efficiency of CR is 98%， which is 1.95 times that of NO₂-MIL-88B and 2.24 times that of MIL-88B， respectively. The CR degradation efficiency could still reach 92% after 4 cycles， the content ratio of Fe³⁺/Fe²⁺ is only reduced by 5%， and its crystal structure remains the same， exhibiting the high cycle stability of NMIL-88B-Cu-1. In the system SO {}_{\mathrm{4}}^{\mathrm{2}-} and NO {}_{\mathrm{3}}^{-} do not affect the degradation of CR， while Cl^- and H₂PO {}_{\mathrm{4}}^{-} with a concentration of 0.09 mo/L show an inhibitory effect on the degradation of CR. The analysis of the mechanism shows that the electron density of Fe³⁺ in the center of the nitro-functionalized material is low， and the introduction of Cu²⁺ constructs Fe-Cu bimetallic MOFs materials. The redox coupling reaction between Fe and Cu and the synergistic effect of Fe-Cu promote the formation of Fe²⁺ effectively， and accelerate the e^- transfer at the interface of NMIL-88B. The generated ·OH can oxidize and degrade CR into inorganic small molecules such as CO₂ and H₂O.

Compared to traditional gas separation methods， membrane separation technology has advantages in low cost， easy operation， and high separation efficiency. In this study， the whisker mullite hollow fiber membrane （M₀） with excellent high-temperature resistance， high strength， and large flux was used as the supporting layer. The PDMS with controllable viscosity was used as the intermediate transition layer. The PDMS coated on the surface of M₀ and covered the defects on the substrate. Subsequently， the UiO-66-NH₂ nanoparticles were modified with amino groups via the hydrothermal method. Trimesoyl chloride was used as the oil-phase monomer， and cysteamine was used as the water-phase monomer for interfacial polymerization. Through this interfacial polymerization process， UiO-66-NH₂ was loaded on the top layer of the composite membrane to form the M₀-PUi composite membrane. The properties of the membrane before and after modification were characterized by FT-IR， XRD， SEM， and water contact angle of the membrane surface. The CO₂/N₂ separation performance of the membrane was tested using a self-made gas separation device. The results show that the CO₂ permeance of the composite membrane reaches 2765.3 GPU at room-temperature and under 0.2 MPa operating pressure， and its separation selectivity for CO₂/N₂ is 3.2. The stable separation selectivity of the composite membrane for CO₂/N₂ is 3.2-3.4 after continuous use at 80 ℃ or 120 ℃ for 6 h.

To improve the proton conductivity of the sulfonated polyether ether ketone/ionic liquid （SPEEK/IL） membrane and reduce the loss rate of IL in the membrane， Cd@Co-MOF-74/Phosphate-4-phenylimidazole ionic liquid （［IM2］［H₂PO₄］）/SPEEK ternary composite membranes were prepared by the solution casting method. Results show that due to the formation of hydrogen bonds between the imidazole ring in ionic liquids and the —OH or carboxylic acid groups in MOF， imidazole molecules are anchored on the pore walls of MOF. The proton conductivity of the ternary composite membrane at 120 ℃ is the highest， reaching 26.93 mS·cm^-1， when the mass fraction of the Cd@Co-MOF-74 doping is 1.5%. The IL loss rate of bimetallic MOF/IL/SPEEK ternary composite membranes with different contents is generally between 20% and 25%. Doping bimetallic MOFs in SPEEK/IL membranes ensures high proton conductivity while reducing the swelling rate of SPEEK/IL composite membranes， thereby increasing their service life.

Metal oxides are often used as electrode materials for supercapacitors because of their high capacity， low cost， suitability for commercialization， and environmental friendliness. In this study， Mn-MOF was used as a precursor and placed in ethanol for ion exchange and etching reaction with Co（NO₃）₂， followed by heat treatment in air， and finally highly crystalline CoMn₂O₄ two-dimensional nanorod structures were obtained on a carbon cloth（CC） substrate. SEM and XRD analyses of CoMn₂O₄/CC prepared with different Co（NO₃）₂ additions and Mn₂O₃/CC obtained by direct heat treatment were performed， and electrochemical properties were measured by cyclic voltammetry test， constant current charge/discharge test and AC impedance test. The results show that the parent structure of CoMn₂O₄/CC is relatively well preserved after 0.3 g Co（NO₃）₂ etching， forming a nano-hollow structure， and the vertical nanorod structures grow in situ on carbon cloth after heat treatment wrapping carbon fibers uniformly and densely， ensuring high mechanical stability and electrical conductivity due to the absence of any binder addition. The electrode material has an area specific capacitance of 809.8 mF·cm^-2 at the current density of 1.2 mA·cm^-2 and the capacitance retention is 79.1% after 5000 cycles at the current density of 5 mA·cm^-2，showing potential application prospects.

In order to study the corrosion resistance of three different superhydrophobic coatings (MZS-1, MZS-2 and ZnO@ZIF-8) on AZ91D magnesium alloy surface in 5% (mass fraction) NaCl solution. The microstructure, wettability and corrosion resistance of the superhydrophobic composite coating were tested and characterized by field emission scanning electron microscope, static contact angle tester, electrochemical workstation and salt spray tester, respectively. The results show that the corrosion of the superhydrophobic coatings does not occur until 192 h after salt spray treatment among the three types of superhydrophobic coatings, and the corrosion of the MZS-1 superhydrophobic coating is the most serious. The surface pitting of the MZS-2 superhydrophobic coating doesn't occur until 240 h later, and the contact angle is still high after salt spray treatment, so the corrosion resistance of the MZS-2 composite coating is the best.The polarization curve tests indicate that the corrosion current density of three superhydrophobic coatings are still one order of magnitude lower than that of the metal matrix after salt spray treatment for 240 h, showing excellent corrosion resistance. The superhydrophobic coating can effectively increase the corrosion resistance of metal materials.It can effectively prevent the infiltration of corrosive ions and provide long-term protection for the matrix because of its water repellency.

Metal-organic frameworks(MOFs) materials, as third generation porous materials, have attracted much attention due to their functional properties such as high specific surface area, high stability and chemical modifiability, especially, the application of loading on various lightweight and flexible substrates is a rapidly growing field. The progress of loading MOFs on textile materials as substrate carriers was reviewed, and an introduction to the construction of fabric-based MOFs composites by solvothermal method, layer by layer method and spray printing method was given, and the application scenarios of different preparation methods were pointed out according to the differences of preparation methods. The composite mechanism of this type of material was summarized. The methods for enhancing the bonding and firmness of MOFs with substrate materials for the durability of composite materials were described. The latest research results on the application of such composites in the fields of superhydrophobic self-cleaning and self-sterilizing textiles were presented. Finally, it was pointed out that the mass production methods of fabric-based MOFs composites and their durability under real environmental conditions are the key step towards a wide range of applications, and their more integrated functions are the key direction for future research.

The interlaminar repairing behavior and thermoforming capacity of new carbon fiber reinforced Vitrimer epoxy resin (V-CFRP) composite and corresponding mechanisms were studied. The results reveal that the glass transition temperature (T_g) of the new Vitrimer epoxy resin is 92.8 ℃, and it exhibits significant stress relaxation behavior at temperatures higher than T_g. The stress relaxation time exhibits a linear relationship with temperature; The hot-press repair behavior and thermoplastic molding ability of V-CFRP composites were studied using a three-point bending experiment. The hot-press repair study shows that hot pressing at 180-220 ℃ for 1.5-2.0 h and 5 MPa can achieve nearly 100% repair of interlaminar damage in the composite; The bending modulus and bending strength of V-CFRP composites is decreased by more than 80% after pre-heating at 180-220 ℃ for 5-30 min. The significant decrease of bending modulus means that V-CFRP composite is suitable for thermoforming process. Moreover, a V-CFRP part with three-dimensional structure is successfully prepared by thermoforming process under the conditions of 200 ℃, 5 MPa and 2 h, which confirms the thermoforming capacity of V-CFRP composites.

Two-dimensional Ce-MOFs nanosheets were successfully constructed by using ceric ammonium nitrate as metal salt and 1, 3, 5-tris(4-carboxyphenyl)benzene (H₃BTB) as organic ligand, together with the use of acetic acid as modulator.Acetic acid modulator shows significant effects on the morphology and crystallinity of Ce-MOFs. Ce-MOFs microspheres synthesized without acetic acid as modulator (named Ce-BTB-H₀) are composed of highly cross-linked small nanosheets with low crystallinity and surface areas. On the contrary, Ce-MOFs synthesized with acetic acid (named Ce-BTB-H₆₀) consist of dispersed nanosheets, and show improved crystallinity and higher surface areas than that of Ce-BTB-H₀. Using blue LED as light source and oxygen as oxidant, two-dimensional Ce-MOFs nanosheets enable decarboxylation oxygenation of a variety of substituted phenylacetic acid to their corresponding benzaldehydes and benzyl alcoholsunder irradiation of blue LED in oxygen atmosphere at room temperature.Moreover, Ce-BTB-H₆₀nanosheets show better photocatalytic performance due to their higher crystallinity, larger specific surface area and improved dispersity than that of Ce-BTB-H₀.

Carbon nanotubes(CNTs), as an important discovery in the research of nanomaterials, have become a research hotspot in the field of carbon materials since their birth. With its unique porous structure, metal-organic frameworks (MOFs) has been developed into one of the frontiers of research in recent years. With the continuous development of materials science in recent years, the research on composite technology of materials with different functional characteristics has become one of the main methods to solve key problems in the field of materials applications.CNTs and MOFs are two very important types of nanomaterials in the current material field. Combining the high electrical conductivity of CNTs with the high specific surface area and rich pore distribution characteristics of MOFs through composite technology is an inevitable trend for future research and application in the field of materials. In this paper, the main composite forms and preparation methods of MOFs and CNTs in recent years were reviewed, and the latest research progress of composites in the fields of supercapacitors, lithium battery electrodes, catalysis, adsorption, etc. was summarized. The synergistic improvement of the performance of the two materials was discussed and analyzed, and it was pointed out that the composite of CNTs and MOFs materials and the growth and distribution of CNTs have a high degree of randomness, and further control of them is the focus of future technical research.

Nanoporous materials have attracted great attention in the fields of adsorption and membrane separation due to their remarkable nanoscale spatial effects. As an extension of inorganic porous materials, metal organic framework (MOF) has been widely used in gas-phase storage and separation, liquid-phase adsorption separation and catalytic reaction due to its large specific surface area, high porosity and adjustable pore structure. In this paper, the types of MOF are classified, and the synthesis methods and particle size control mechanism of MOF materials were compared. Among them, the advantages of solvothermal synthesis were emphatically introduced. At the same time, the problems and limitations of MOF materials in adsorption separation research were summarized systematically, and the advanced preparation technology of composite membrane based on MOF materials was prospected; the application of MOF in gas storage separation, liquid adsorption separation and membrane separation was summarized. Finally, for the preparation of composite membrane, the idea of improving the compatibility of MOF material and organic membrane by changing the synthesis method of MOF was proposed.