摘要 : Rattan is a multi-purpose plant resource in the tropical forest treasure house. With its good technological characteristics, it has become an excellent material for the preparation of industry. The original rattan is an important forest product second only to wood and bamboo. The annual output of the original rattan is millions of tons, which plays an important role in regional economic and social development. Rattan is mainly used for the manufacture of furniture, crafts and accessories, of which >95 % of the palm rattan is used for the production of furniture. Based on the physical and chemical structure of rattan, this paper discusses the common modification methods such as chemical treatment, bleaching and resin impregnation in recent years in view of the defects of rattan itself. The high value-added materials developed by using rattan as the base material in recent years were further reviewed, including rattan-based porous carbon materials, rattan-plastic composites, rattan-based ceramics, rattan-fiber-based materials and rattan-stem-based composites, aiming to broaden their application fields and promote the development and utilization of rattan resources and industrial development.

摘要 : Porous carbon has been widely used in aqueous capacitors due to its wide source, high stability, and controllable preparation. However, the two-step preparation strategy of carbonization and activation with complex operation and serious energy consumption severely limits its further application. In this paper, resorcinol/urea-furfural resin was successfully prepared by using cleaner and greener furfural as raw material and co-crosslinking with resorcinol and urea under the action of catalyst. It is noteworthy that during the curing process, KOH is uniformly anchored inside the resin, so the system only needs one-step high-temperature pyrolysis to obtain a N-doped ant-nest-like three-dimensional interconnected porous carbon material. Consequently, the porous carbon exhibited an impressive specific capacitance of 283F g −1 . The assembled symmetrical device shows a capacitance retention of 92 % after 50 000 cycles, showing excellent cycle stability. In addition, the assembled zinc ion hybrid capacitor exhibits a capacitance of 138 mAh g −1 and an energy density of 111 Wh kg −1 . The one-step carbonization-doping-activation strategy of this bottom-up in-situ anchoring activator will provide further insights into the hierarchical pore structure design of porous carbon and facilitate the simple and efficient preparation of carbon materials.

摘要 : The accumulation of antibiotics in aquatic environments poses escalating risks to both ecosystems and human health. However, current water remediation strategies are hampered by numerous limitations, especially in operating costs and processing efficiency. Herein, the MIL-100(Fe)@wood membrane with high metal-organic frameworks (MOFs) loading is prepared by a simple flow-based fabrication technique. The presented integrated water purification system comprising membrane preparation, antibiotic removal and membrane regeneration allows for the sequential and continuous execution of the individual processes, thereby improving the sustainability, time efficiency and energy efficiency of the system. The highly efficient and flowthrough capturing membranes (MIL-100(Fe)@wood) are reported to remove numerous common antibiotics from water: tetracycline (TC), ciprofloxacin (CIP), amoxicillin (AMX), roxithromycin (RXM), and sulfamethazine (SMT). The stability and excellent long-term performance under different pH environmental conditions of MIL-100(Fe)@wood are demonstrated. Furthermore, the removal mechanisms of the multimolecular interactions occurring between antibiotic and MIL-100(Fe)@wood have also been explored. The unique advantage of MIL-100(Fe)@wood is employed in sustainable, cost-effective, and facile strategies for the removal of antibiotics.

摘要 : In recent years, the widespread use of wood products has been observed in many fields. Wooden products have excellent green and environmentally friendly characteristics, but their performance often cannot meet people's needs. Many researchers have conducted in-depth research on wood-based composite materials and their modification methods in order to improve the performance of wood. This article provides a selective review of the types, modification methods, and properties of inorganic modifiers. The preparation methods are mainly divided into immersion methods, sol-gel methods, and hydrothermal synthesis. The flame retardancy, mechanical properties, hydrophobicity, and mold resistance of modified wood have been effectively improved. In addition, modified wood also has photoresponsive properties, electrical conductivity, and thermal conductivity. Finally, the challenges and perspectives on advanced wood-inorganic composites have been proposed for guiding future studies.

摘要 : An Fe-doped Ni-based oxalate framework, synthesized via a facile co-precipitation method, is applied as an excellent bi-functional electrocatalyst for water and urea oxidation reactions. The obtained framework achieved a large current density of 100 mA cm−2 at 1.497 V and 1.375 V (vs. RHE) for the OER and UOR, highlighting its potential for practical hydrogen production.

摘要 : Developing high performance and cost-effective electrocatalysts toward oxygen reduction reaction (ORR) is of critical significance for fuel cells and metal–air batteries. Herein, CoO@Co nanoparticles encapsulated in three-dimensional (3D) porous nitrogen-doped carbon (CoO@Co/Co-N-C) have been successfully derived from the cobalt–tannin framework via the NH4Cl salt template strategy. Owing to the generated NH3 and HCl gas from NH4Cl during the pyrolysis process, CoO@Co/Co-N-C formed a 3D porous carbon architecture with ultrahigh-specific surface area (1052.5 m2 g−1). This hybrid catalyst exhibits comparable ORR catalytic activity, as well as superior stability to 20 wt% Pt/C in alkaline conditions. This finding offers a novel and facile strategy to synthesize 3D porous carbon as non-precious metal electrocatalysts for energy conversion and storage applications.

摘要 : The complex structure of cellulose leads to its low accessibility to reagents, which hinders the further development of cellulose-based natural fibers in supercapacitors. The key issue is how to achieve deep internal activation while maintaining the flexible self-supporting skeleton structure of cellulose. In this work, an intercalation activation method was proposed. The activator infiltrated into the cellulose microcrystalline structure under rapid swelling to construct a new hydrogen bond network. RC/N2 has a large specific surface area (1897 m 2 g −1 ) and exhibits excellent electrochemical performance due to the uniform activation of NaOH pre-inserted between cellulose layers while ensuring the flexibility of cellulose. At a current density of 0.1 A g −1, it reaches 352 F g −1, and the assembled symmetric supercapacitor has a capacitance retention rate of 98 % after 70, 000 cycles. In addition, the symmetric flexible supercapacitor assembled based on RC/N2 has good stability after multi-angle bending, which opens up further possibilities for the development of flexible energy storage devices.

摘要 : With the rapid development of information technology, people's security awareness of information protection is enhanced, and the requirements for anti-counterfeiting technology have become higher and higher on different occasions. Smart materials with light stimulus response have attracted extensive attention in the development of anti-counterfeiting materials, especially next-generation intelligent transparent wood. Inspired by the color-changing behavior of plants and animals in nature, a photochromic transparent wood (PTW) composite with light-stimulated response was prepared by compounding rare earth luminescent complexes with transparent wood (TW). PTW exhibits high transmittance (85.5 %). Moreover, PTW exhibits different optical states under different light conditions, namely, colorless under sunlight and bright red fluorescence under 365-nm UV light, and the process is reversible. Additionally, PTW patterned by laser etching offered greater flexibility and personalization in terms of stimulus-response, and its information security under different light stimuli is demonstrated. Meanwhile, the PTW prepared can be applied to different products and their packaging as an invisible anti-counterfeiting label, and the storage and protection of information is realized under visible light, and the decoding of information is implemented in UV light, so as to achieve the invisible anti-counterfeiting of information. More importantly, invisible information can be clearly identified even in black packaging. The design concepts and techniques of this study provide an inspiration to combine smart responsive materials with wood-based materials to develop intelligent responsive materials, and also provides support for the subsequent design and preparation of invisible anti-counterfeiting materials.

摘要 : Accordion-like multilayered Ti3C2Tx MXene has garnered significant attention due to its high conductivity and sensitivity, thereby being promising for acetone sensing. However, the limited stability of thin-layered MXene hinders its applications at high temperature. In this study, MXene/Co3O4 was synthesized via a self-assembly method by coating thin-layered MXene with Co3O4 nanosheets (Co3O4 NS) to enhance acetone sensing performance, especially at a high temperature of up to 200 °C. An interfacial electric field arises between Ti3C2Tx MXene and Co3O4 NS because of their different work functions. Due to a synergistic effect of the interfacial electric field and the surface-coated Co3O4, MXene/Co3O4 achieves the highest response intensity for acetone concentrations ranging from 0.1 to 1000 ppm, surpassing the individual sensitivities of Co3O4 NS and MXene alone. Remarkably, the detection limit of MXene/Co3O4 (0.1 ppm) outperforms those of Co3O4 NS and MXene. Employing the AdaBoost algorithm for machine learning, MXene/Co3O4 demonstrated 99.76% accuracy in distinguishing acetone from six other gases, holding great potential for practical gas sensing applications. The acetone adsorption energy of the MXene/Co3O4 heterojunction calculated by density functional theory is −0.97 eV, indicating easier adsorption than MXene and Co3O4 NS. This study presents a facile approach to fabricate MXene/metal oxide-based materials for acetone sensing, offering promising prospects in gas sensor development and showing universal significance for gas sensing fabrications.

摘要 : High-performance porous polyimide (PI) monoliths, including PI aerogels, sponges, and foams, have become one of the hotspots in both researching and applications due to their superior properties such as high porosity, outstanding mechanical and thermal stability, low dielectric constant and thermal conductivity. Up to now, various fabricating methods and applicating situations for PI porous monolith materials have been reported. From the viewpoint of molecular chemistry, porous structure construction, as well as the functional modification, the property optimization and adjustment are feasible, endowing PI monoliths with promising potential for different practical applications ( e.g. sensors, low-k materials, thermal management, energy field and utilization, absorption and filtration, photonic utilization, etc.). In this review, the recent progress of porous PI monoliths was summarized in detail based on the fabrication methods, functional modifications, as well as multi-functional applications. Besides, the future perspectives of this field were also provided for reference. Apart from presenting an overview of progress made in the field of PI porous monoliths, this review could also be meaningful for those researching topics which have similarity within.