175 results match your criteria: "College of Materials Engineering[Affiliation]"

Ionogel has recently emerged as a promising ionotronic material due to its good ionic conductivity and flexibility. However, low stretchability and significant hysteresis under long-term loading limit their mechanical stability and repeatability. Developing ultralow hysteresis ionogels with high stretchability is of great significance.

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Renewable hemicellulose-based materials for value-added applications.

Carbohydr Polym

October 2024

National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.. Electronic address:

The importance of renewable resources and environmentally friendly materials has grown globally in recent time. Hemicellulose is renewable lignocellulosic materials that have been the subject of substantial valorisation research. Due to its distinctive benefits, including its wide availability, low cost, renewability, biodegradability, simplicity of chemical modification, etc.

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Cellulose plays a significant role in designing efficient and stable cellulose-based metallic catalysts, owing to its surface functionalities. Its hydroxyl groups are used as anchor sites for the nucleation and growth of metallic nanoparticles and, as a result, improve the stability and catalytic activity. Meanwhile, cellulose is also amenable to surface modifications to be more suitable for incorporating and stabilizing metallic nanoparticles.

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Traditional hydrogel-based wearable sensors with flexibility, biocompatibility, and mechanical compliance exhibit potential applications in flexible wearable electronics. However, the low sensitivity and poor environmental resistance of traditional hydrogels severely limit their practical application. Herein, high-ion-conducting poly(vinyl alcohol) (PVA) nanocomposite hydrogels were fabricated and applied for harsh environments.

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Bacteria and virus infections have posed a great threat to public health and personnel safety. For realizing rapid sterilization of the bacteria and virus, electrical stimulation sterilization was adopted to endow cellulose fibers with instantaneous antibacterial and antiviral properties. In the proposed strategy, the fiber is fluffed by mechanical refining, and then by means of the hydrogen bond between hydroxyl and aniline, the polyaniline (PANI) directionally grows vertically along the fine fibers via in-situ oxidative polymerization.

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Lattice capacity-dependent activity for CO methanation: crafting Ni/CeO catalysts with outstanding performance at low temperatures.

Nanoscale

June 2024

Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Rare Earths, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China.

In the pursuit of understanding lattice capacity threshold effects of oxide solid solutions for their supported Ni catalysts, a series of Ca-doped CeO solid solutions with 10 wt% Ni loading (named Ni/CaCeO) was prepared using a sol-gel method and used for CO methanation. The lattice capacity of Ca in the lattice of CeO was firstly determined by the XRD extrapolation method, corresponding to a Ca/(Ca + Ce) molar ratio of 11%. When the amount of Ca in the CaCeO supports was close to the CeO lattice capacity for Ca incorporation, the obtained Ni/CaCeO catalyst possessed the optimal intrinsic activity for CO methanation.

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BaTiO Catalyzed Ultrasonic-Driven Piezoelectric-Induced Reversible Addition-Fragmentation Chain-Transfer Polymerization in Aqueous Media.

Macromol Rapid Commun

September 2024

Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China.

Article Synopsis
  • * It describes a specific method called piezo-RAFT polymerization, which uses ultrasonic waves (40 kHz) and piezoelectric nanoparticles to initiate the polymerization process in water, leading to the creation of controlled and consistent polymers.
  • * The resulting piezoelectric hydrogels from this process are highlighted for their potential applications in stress sensors, showcasing the practical utility of the researched technique.
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Herein, Cellulose-templated ZnCuO/AgO nanocomposites were prepared using biological renewable cellulose extracted from water hyacinth (). Cellulose-templated Cu-doped ZnO catalysts with different amounts of Cu as the dopants (1, 2, 3, and 4%) were prepared and denoted CZ-1, CZ-2, CZ-3, and CZ-4, respectively, for simplicity. The prepared catalysts were tested for the degradation of methylene blue (MB), and 2% Cu-doped ZnO (CZ-2) showed the best catalytic performance (82%), while the pure ZnO, CZ-1, CZ-3, and CZ-4 catalysts exhibited MB dye degradation efficiencies of 54, 63, 65, and 60%, respectively.

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Ion Sieve Interface Assisted Zinc Anode with High Zinc Utilization and Ultralong Cycle Life for 61 Wh/kg Mild Aqueous Pouch Battery.

ACS Nano

February 2024

Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, People's Republic of China.

The cycling stability of a thin zinc anode under high zinc utilization has a critical impact on the overall energy density and practical lifetime of zinc ion batteries. In this study, an ion sieve protection layer (ZnSnF@Zn) was constructed on the surface of a zinc anode by chemical replacement. The ion sieve facilitated the transport and desolvation of zinc ions at the anode/electrolyte interface, reduced the zinc deposition overpotential, and inhibited side reactions.

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The global concern over water pollution caused by organic pollutants such as methylene blue (MB) and other dyes has reached a critical level. Herein, the Allium cepa L. peel extract was utilized to fabricate copper oxide (CuO) nanoparticles.

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Correction: Critical role of hydrogen bonding between microcrystalline cellulose and g-CN enables highly efficient photocatalysis.

Chem Commun (Camb)

January 2024

National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

Correction for 'Critical role of hydrogen bonding between microcrystalline cellulose and g-CN enables highly efficient photocatalysis' by Zhaoqiang Wang , , 2024, , 204-207, https://doi.org/10.1039/D3CC04800D.

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Improving the stability of perovskite nanocrystals SiO coating and their applications.

RSC Adv

January 2024

College of Materials Engineering, Henan International Joint Laboratory of Rare Earth Composite Materials, Henan University of Engineering Xinzheng 451191 China

Lead halide perovskite nanocrystals (LHP NCs) with outstanding optical properties have been regarded as promising alternatives to traditional phosphors for lighting and next-generation display technology. However, the practical applications of LHP NCs are seriously hindered by their poor stability upon exposure to moisture, oxygen, light, and heat. Hence, various strategies have been proposed to solve this issue.

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Upgrading the Separators Integrated with Desolvation and Selective Deposition toward the Stable Lithium Metal Batteries.

Adv Mater

March 2024

Department of Materials Science and Engineering, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410000, P. R. China.

A practical and effective approach to improve the cycle stability of high-energy density lithium metal batteries (LMBs) is to selectively regulate the growth of the lithium anode. The design of desolvation and lithiophilic structure have proved to be significant means to regulate the lithium deposition process. Here, a fluorinated polymer lithiophilic separator (LS) loaded with a metal-organic framework (MOF801) is designed, which facilitates the rapid transfer of Li within the separator owing to the MOF801-anchored PF from the electrolyte, Li deposition is confined in the plane resulting from the polymer fiber layer rich in lithiophilic groups (C─F).

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Environmental pollution has been decreased by using photocatalytic technology in conjunction with solar energy. An efficient method to obtain highly efficient photocatalysts is to build heterojunction photocatalysts by combining graphitic carbon nitride (g-CN) with layered double hydroxides (LDHs). In this review, recent developments in LDH/g-CN heterojunctions and their applications for organic pollutant removal are systematically exhibited.

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Critical role of hydrogen bonding between microcrystalline cellulose and g-CN enables highly efficient photocatalysis.

Chem Commun (Camb)

December 2023

National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

Developing a highly efficient photocatalyst for energy and environmental applications is urgently required. Herein, graphitic carbon nitride (CN) coupled with microcrystalline cellulose (MCC) (denoted as MCC-X/CN) shows excellent photocatalytic performance for tetracycline (TC) degradation and H evolution. And the optimized MCC-0.

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Article Synopsis
  • Low-grade heat can be converted into electricity using gel-state thermogalvanic cells (GTCs), but these cells struggle with low ionic conductivity and mechanical strength.
  • A new design using bacterial cellulose (BC) nanofibers improves the thermopower and mechanical properties of GTCs, achieving impressive conductivity and output power.
  • By connecting 15 BC-GTC units, an output voltage of 3.35 V was reached at a 65 K temperature gradient, capable of powering various electronic devices, encouraging sustainable energy solutions.
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Chiral Confined Unimolecular Micelles for Controlled Fabrication of Optically Active Hybrid Nanostructures.

J Phys Chem Lett

November 2023

Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.

Functional nanomaterials made by chiral induction have attracted extensive attention because of their intriguing characteristics and potential applications. However, the precise and controllable fabrication of chiral nanomaterials still remains challenging but is highly desired. In this study, chiral unimolecular micelles with different molecular weights and chiroptical activities were prepared by photoinduced atom transfer radical polymerization (photoATRP).

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Simple preparation of lignosulfonate stabilized eutectic gallium/indium liquid metal nanodroplets through ball milling process.

Int J Biol Macromol

January 2024

Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China. Electronic address:

The combination of biomass and liquid metal (LM) makes the preparation process "greener" and application of LM composite materials more sustainable. Here we reported the solvent free preparation of lignosulfonate (LS) stabilized eutectic gallium/indium (EGaIn) LM nanodroplets through ball milling (BM), which was recognized to be efficient and environmentally-friendly alternatives to solution-based methods. By regulating the BM frequency and milling time, uniform LM nanodroplets with a size <200 nm can be achieved.

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A corolla-shaped Schiff base polymer was synthesized from terephthalaldehyde (TPAD), glutaraldehyde (GA), and -phenylenediamine (PPD) by block copolymerization, and Schiff base iron complexes were formed by doping with FeCl. The microscopic morphology, crystal structure, and elemental valence state were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Comparing the change of conductivity before and after Fe doping, it was found that the conductivity did not break away from the category of insulator, and the doped sample is a paramagnetic material.

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Sustainable Photo- and Electrochemical Transformation of White Phosphorous (P ) into P Organo-Compounds.

Chemistry

November 2023

Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China.

Elemental white phosphorous (P ) is a crucial feedstock for the entire phosphorus-derived chemical industry, serving as a common precursor for the ultimate preparation of high-grade monophosphorus (P ) fine chemicals. However, the corresponding manufacturing processes generally suffer from a deep reliance on hazardous reagents, inputs of immense energy, emissions of toxic pollutants, and the generation of substantial waste, which have negative impacts on the environment. In this context, sustainability and safety concerns provide a consistent impetus for the urgent overall improvement of phosphorus cycles.

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The rapid recombination of photogenerated carriers of photocatalysts greatly limits their actual application in CO conversion into valuable chemicals. Herein, dual CuO and MnO cocatalysts are decorated on g-CN nanosheets a one-step photodeposition strategy. Benefiting from the repulsion between Cu and Mn cations, a novel g-CN-based heterostructure loaded with spatially separated CuO and MnO nanoparticle dual cocatalysts has been successfully fabricated.

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Template-induced crystallization of charged colloids: a molecular dynamics study.

Soft Matter

August 2023

Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.

By using a large enough number of particles and implementing a parallel algorithm on the CUDA platform, we have performed brute-force molecular dynamics simulations to study the template-induced heterogeneous crystallization in charged colloids. Six kinds of templates, whose patterns include the planes of fcc(100), fcc(110), fcc(111), bcc(100), bcc(110) and bcc(111), have been implanted into the middle of the simulation box. Except the fcc(111) template, whose structure benefits not only fcc but also hcp crystals resulting in a similar behavior to homogeneous crystallization, bcc-type templates favor the formation of bcc crystals and bcc-like precursors while fcc-type templates favor the formation of fcc crystals and fcc-like precursors.

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Plywood is widely used in construction, such as for flooring and interior walls, as well as in the manufacture of household items such as furniture and cabinets. Such items are made of wood veneers that are bonded together with adhesives such as urea-formaldehyde and phenol-formaldehyde resins. Researchers in academia and industry have long aimed to synthesize lignin-phenol-formaldehyde resin adhesives using biomass-derived lignin, a phenolic polymer that can be used to substitute the petroleum-derived phenol.

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A series of highly fluorinated polyimide/allomelanin nanoparticles (FPI/AMNPs) films were prepared with FPI as the matrix and AMNPs as the filler. Due to the formation of hydrogen bonds, significantly reinforced mechanical and UV-shielding properties are acquired. Stress-strain curves demonstrated a maximum tensile strength of 150.

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Introduction: Accurate and fast identification of wood at the species level is critical for protecting and conserving tree species resources. The current identification methods are inefficient, costly, and complex.

Methods: A wood species identification model based on wood anatomy and using the genus wood cell geometric dataset was proposed.

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