检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Liu, Xing Li, Yudong Li, Pengwei School of Materials Science and Engineering Yancheng Institute of Technology Yancheng224051 China Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Harbin150040 China North China University of Water Resources and Electric Power China

Herein, the Cu2Se@Amorphous Carbon@Graphene Nanobelt/g-C3N4 (Cu2Se@C@GN/g-CN) nanocomposite is successfully synthesized by constructing a spatial garphene cross network with the strategy of "Winding + Adsorption" to form an effective orientated directed transmission band of electrons channel between the three-dimentional Cu2Se and two-dimensional g-CN. Such unique structure of Cu2Se@C@GN/g-CN can realize the effective grasp of the two-dimensional g-CN sheet and the three-dimensional Cu2Se@C through multi-path connection to guarantee the photogenerated electron in g-CN can directly transport to the Cu2Se along the inter-connected spatial cross 1D graphene nanobelt network to make sure the immediately reduction of H+ to hydrogen. The Z-Scheme charge transfer mechanism contributes to the spatial separation of charges and maintains the strongest redox potential. Notably, the photocatalytic hydrogen evolution rate of Cu2Se@C@GN/g-CN can reach up to 127.3 μmol g-1 h-1, which is higher than Pt(2%)/g-CN (111.6 μmol g-1 h-1) and 106 times higher than the g-CN (1.2 μmol g-1 h-1). © 2023, The Authors. All rights reserved.

关键词： Selenium compounds

Wood-Inspired Anisotropic Pu/Chitosan/Mxene Aerogel Used as an Enhanced Solar Evaporator with Superior Salt-Resistance

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Sun, Miao Yang, Haiyue Wang, Xin Gao, Xiong Wang, Chengyu Ho, Shih-Hsin Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Material Science and Engineering College Northeast Forestry University Harbin150040 China State Key Laboratory of Urban Water Resources and Environment School of Environment Harbin Institute of Technology Harbin150040 China

Solar desalination technology is an effective approach to produce clean water through evaporating seawater driven by solar energy. However, it remains a great challenge to develop a kind of solar evaporator with high salt-resistance, great stability and superior efficiency. Herein, inspired by wood structure, a polyurethane/chitosan/MXene aerogel with directional channel structure was originally designed as the solar evaporator for desalination by the freeze-casting method. The unique anisotropic three-dimensional structure enabled the solar evaporator with efficient water transport network, which can effectively improve the salt-rejecting capability. Meanwhile, due to the combination of the full spectral absorption capacity of MXene and the unique directional channel structure,satisfactory evaporation rate (1.81 kg.m-2 h-1) and high evaporation efficiency (85.07%) under one-sun irradiation were achieved. Moreover, the evaporator continuously achieving high evaporation rate for 12 h under one-sun irradiation and stably floating on the high- concentration salt water for over 14 days. Also, a series of simulation and numerical modeling were carried out to assist in proving the mechanism of water transportation and desalination in the evaporator. Together, this work may provide a promising avenue for developing an efficient solar evaporator with superior salt blocking ability that could be potentially used for long-term clean water generation. © 2022, The Authors. All rights reserved.

关键词： Aerogels

Regulating Dynamic Equilibrium of Active Hydrogen for Super-Efficient Nitrate Electroreduction to Ammonia

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Gao, Yang Li, Yudong Han, Enshan Song, Maosen Yang, Ziyi Guo, Feng He, Yanzhen Yang, Xiaohui School of Chemical Engineering and Technology Hebei University of Technology Tianjin300130 China Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Harbin150040 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China

Electrocatalytic nitrate reduction to ammonia (NRA) is a promising strategy for restoring the global nitrogen cycle imbalance while opening up a sustainable avenue for ammonia synthesis. However, the ammonia selectivity and Faradaic efficiency (FE) of electrocatalysts are restrained by the multiple complex reactions during the whole electrolysis process. Herein, we synthesized a series of cobalt phosphide nanowire array catalysts with different phosphidation degrees grown on nickel foam (CoP NWAs/NF). An extremely high nitrate conversion rate of 97.9% as well as ammonia selectivity and FE of ~100% were attained by the optimal CoP NWAs/NF-300 in the NRA reaction, which was much superior to those of counterpart Co3O4 NWAs/NF catalyst and reported cobalt-based catalysts. Several control experiments together unveiled the dynamic equilibrium of active hydrogen production and consumption is conducive to simultaneously obtaining the super selectivity and FE for ammonia synthesis. This work provides a novel insight for the rational design of high-performance NRA catalyst. © 2023, The Authors. All rights reserved.

关键词： Ammonia

Comparison of the Properties of Phenolic Resin Synthesized from Different Aldehydes and Evaluation of VOCs Release and Health Risks

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Chen, Yu Shen, Jun Wang, Weidong Li, Lin Zheng, Dezong Qi, Fei Wang, Xiaodong Li, Quanji Key Laboratory of Bio-Based Material Science & Technology of Ministry of Education College of Material Science and Engineering Northeast Forestry University Harbin150040 China Engineering Research Center of Advanced Wooden Materials of Ministry of Education College of Material Science and Engineering Northeast Forestry University Harbin150040 China Layo Wood Industry Co. Ltd Zhejiang China

Different amounts of glyoxal and paraformaldehyde were used to synthesize phenol glyoxal (PG) and phenol paraformaldehyde (PPF) resins, which were compared to conventional phenol formaldehyde (PF) resins. The oxidation of glyoxal leads to a pH value of 9.83 for PG 2.2. Due to the addition of polyformaldehyde, PPF 2.2 has a greatest viscosity at 17333.33 mPa∙s. The PPF 2.0 plywood has a bonding strength of as high as 1.94 MPa. The formaldehyde emission of PG 1.8 plywood is found to have a minimum value of 0.025 μg/m3, reaching the ENF (≤ 0.025 μg/m3) limit range. The emission of volatile organic compounds (VOCs) from plywood changes significantly depending on the aldehydes used. Acetaldehyde is found only in PG plywood and is associated with the rise of glyoxal. In comparison to the other two types of plywood, PPF plywood has a much greater aromatic VOCs content and total volatile organic compound (TVOC) emissions. The measured TVOC value for PPF 2.2 is 196.07 μg/m3. The results showed that the TCR of PPF 1.8, PPF 2.0, and PG 1.8 are above the threshold of 1.00E-4, which indicates a definite carcinogenic risk. The presence of acetaldehyde in PG plywood was found to exceed the safety threshold for non-carcinogenic risk. The substitution of formaldehyde with other aldehydes has been shown to effectively decrease the emission of formaldehyde in plywood, which leads to the release of different VOCs in plywood. Limiting the VOCs that high health hazards is crucial to reducing the negative impact of plywood on both the indoor environment and human health. © 2023, The Authors. All rights reserved.

关键词： Phenols

biomimetic Wood-Confined Hydrogel Ion Channel for Flexible Supercapacitors

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Gao, Chenxiang Liu, Yue Zhang, Jiuzhou Li, Hui Liu, Yang Gu, Jiyou Ma, Tianyi Huo, Pengfei Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin150040 China School of Science RMIT University MelbourneVIC3000 Australia

Hydrogel is a promising polymer electrolyte substrate;however, the dimensional stability and ionic conductivity need to be further improved. To tackle this issue, a flexible poly (acrylic acid-co-acrylamide) [P(AA-co-AM)]-filled wood hydrogel composite electrolyte (WHE) is rationally designed and fabricated to substantially enhance the ionic conductivity, leading to high-performance flexible supercapacitors. This is the first demonstration that flexible wood as a porous backbone for hydrogels can effectively regulate ion transport pathways to improve ionic conductivity and enhance the dimensional stability of hydrogels. Firstly, the wood was delignified. Then the P(AA-co-AM) hydrogel was uniformly distributed in the low tortuosity pores of the wood by an in-situ polymerization reaction. The straight pores of wood confine electrolyte ion transport, allowing it to follow the shortest path at high speed. The regulation effect of wood on ion transport paths makes the ionic conductivity (3.0 × 10-2 S cm-1) of the electrolyte standing among the best of composite polymer electrolyte. The optimized supercapacitor exhibited a specific capacitance of 155.64 F g-1 and an energy density of 7.45 W h kg-1 at a power density of 141.87 W kg-1. It also exhibited good flexibility under bending conditions and could maintain similar electrochemical performance at a wide range of bending angles. This work provides an effective strategy for the efficient use of wood resources and the development of low-cost, environmentally friendly and high-performance hydrogel electrolyte materials. © 2022, The Authors. All rights reserved.

关键词： Hydrogels

Interfacial synthesis of crystalline quasi-two-dimensional polyaniline thin films for high-performance flexible on-chip micro-supercapacitors

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第8期33卷 3921-3924页

作者： Tao Zhang Panpan Zhang Zhongquan Liao Faxing Wang Jinhui Wang Mingchao Wang Ehrenfried Zschech Xiaodong Zhuang Oliver G.Schmidt Xinliang Feng Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China Faculty of Chemistry and Food Chemistry Technische Universität DresdenDresden 01062Germany Center for Advancing Electronics Dresden(cfaed) Technische Universität DresdenDresden 01062Germany Fraunhofer Institute for Ceramic Technologies and Systems(IKTS) Dresden 01109Germany Material Systems for Nanoelectronics Chemnitz University of TechnologyChemnitz 09107Germany Institute for Integrative Nanosciences IFW DresdenDresden 01069Germany School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Special Functional Materials of Ministry of Education Henan UniversityKaifeng 475004China

Quasi-two-dimensional(q2 D)conducting polymer thin film synergizes the advantageous features of longrange molecular ordering and high intrinsic conductivity,which are promising for flexible thin film-based micro-supercapacitors(MSCs).Herein,we present the high-performance flexible MSCs based on highly ordered quasi-two-dimensional polyaniline(q2 D-PANI)thin film using surfactant monolayer assisted interfacial synthesis(SMAIS).Owing to high electrical conductivity,rich redox chemistry,and thin-film morphology,the q2 D-PANI MSCs show high volumetric specific capacitance(ca.360 F/cm^(3))and energy density(17.9 m Wh/cm^(3)),which outperform the state-of-art PANI thin-film based MSCs and promise for future flexible electronics.

关键词： 2D polymers Conducting polymers Interfacial synthesis Flexible electronics Microsupercapacitor

Numerous Active Sites in Self-Supporting Co3o4 Nanobelt Array for Boosted and Stabilized 5-Hydroxymethylfurfural Electro-Oxidation

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Liu, Dan Li, Yudong Wang, Chengyu Yang, Haiyue Wang, Rong Li, Shujun Yang, Xiaohui Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Harbin150040 China School of Metallurgy and Materials Engineering Chongqing University of Science & Technology Chongqing401331 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China

Constructing an efficient electrocatalyst for the oxidation of 5-Hydroxymethylfurfural(HMF) to 2,5-furan dicarboxylic acid(FDCA) is highly desirable in achieving biomass conversion. Generally, there are two strategies to enhance the electrocatalyst’s activity: increasing the number of active site or increasing the intrinsic activity of each active site. Compared with the latter, the former is usually ignored in the HMF oxidation reaction(HMFOR), but it is very critical for practical applications. Herein, we fabricate a self-supporting three-dimensional porous Co3O4 nanobelt array(P-Co3O4-NBA) electrode with numerous active sites. Benefiting from the unique structural feature, P-Co3O4-NBA demonstrates nearly 100% of HMF conversion efficiency, 96.9% of FDCA selectivity, and 97.0% of Faraday efficiency. Notably, it can also deliver remarkable long-term stability over 30 continuous cycles. These exceptional features position P-Co3O4-NBA as one of the most promising electrocatalysts reported thus far for HMFOR. This work highlights the potential application of HMF oxidation to FDCA in large-scale industrial processes. © 2023, The Authors. All rights reserved.

关键词： Electrocatalysts

Fluorescent Poly(vinyl alcohol) Films Containing Chlorogenic Acid Carbon Nanodots for Food Monitoring (vol 3, pg 7611, 2020)

学校读者我要写书评

暂无评论

ACS APPLIED NANO materialS 2020年第11期3卷 11658-11658页

作者： Zhang, Xinyue Wang, Hui Niu, Na Chen, Zhijun Li, Shujun Liu, Shou-Xin Li, Jian Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Harbin 150040 P. R. China Key Laboratory of Wood Science and Technology Zhejiang Agriculture and Forestry University Wusu Road 666 Hangzhou 311300 P. R. China

Functional materials that can sense food quality, detect additives, and lengthen storage times have huge potential in the food industry. Such materials, however, typically require toxic raw materials and complicated syntheses. Here, chlorogenic acid was used to fabricate photoluminescent carbon dots in an environmentally friendly and economical method. Transmission electron microscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy showed a conjugated structure containing phenolic hydroxyl moieties. The carbon dots were doped into poly(vinyl alcohol) (PVA) to produce a functional film with good physical and mechanical performances. The optical properties of the film were characterized by UV–vis and photoluminescence spectroscopy. The fluorescence of the film was found to be sensitive to both the pH and Al3+ions. Scanning electron microscopy and atomic force microscopy micrographs showed the surface roughness of the fluorescent and PVA films. A solution of carbon dots and the functional film both demonstrated strong antioxidant capacity, and the as-prepared film showed good resistance to photobleaching. The film can be used to limit fruit shelf life, to detect Al3+residues in food, and to sense basic substances, including amines produced during spoilage. The film is a potential promising intelligent food-packaging material that can both extend the shelf life of foods and sense additives or contaminants.

关键词： Chlorogenic acid Carbon nanomaterials Quantum dots Fluorescence Food

Gypsum Composites Reinforced by Hemp Fibers Via Enhanced Interfacial Compatibility

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Sun, Yanjun Chen, Qin Zhang, Xiao Ma, Yangbao Wu, Yihang Guo, Zixu Tan, Haiyan Bai, Long Huan, Siqi Gu, Jiyou College of Material Science & Engineering Northeast Forestry University Harbin150040 China Academy of Art Northeast Agricultural University Harbin150040 China Northeast Forestry University China College of Materials Engineering Henan University of Engineering Zhengzhou450000 China Key Laboratory of Bio-based Material Science & Technology China

Natural fibers have gained attraction as a means to enhance the mechanical properties of gypsum. This study examines the effects of untreated, modified, and dual-modified hemp fibers on the gypsum/fiber composites. The changes in the fibers and composites are characterized by SEM, ATR-FTIR, XRD, mechanical strength, initial and final setting time. The results demonstrate that the combination of alkali and PEO treatment enables the most evenly dispersion of fibers. Compared with pure gypsum, the elastic modulus and bending strength of the composites increase by 56% and 42%, respectively. Additionally, hydration process reveals that PEO helps to form denser composite structures. © 2023, The Authors. All rights reserved.

关键词： Gypsum

Engineering chiral mesoporous silica nanoparticles: Template design and structural control for advanced applications

学校读者我要写书评

暂无评论

Supramolecular Materials

Supramolecular materials 2025年 4卷

作者： Yin, Yu Wei, Wu Zhang, Kai Sustainable Materials and Chemistry Department of Wood Technology and Wood-based Composites University of Göttingen Göttingen 37077 Germany Biotechnology Center (Biotechnikum) University of Göttingen Göttingen 37077 Germany Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Heilongjiang Harbin 150040 China

Chiral mesoporous silica nanoparticles (CMSNs) are a distinct subset of mesoporous silica nanoparticles, combining the favorable physicochemical properties of MSNs with unique chiral architectures at both molecular and macroscopic scales. These helical structures endow CMSNs with specialized functionalities, enabling their applications in chiral catalysis, enantioselective recognition, chiral separation, drug delivery, and optical devices, making them a focal point in materials and biomedical research. Significant progress has been achieved in the synthesis of CMSNs, particularly in understanding the mechanisms of chirality formation and the critical role of surfactant templates in guiding chiral structures. This review summarizes these advancements, emphasizing experimental and theoretical insights. key applications of CMSNs, especially in drug delivery systems, are explored in detail, highlighting their potential to enhance bioavailability and therapeutic efficacy. Looking ahead, CMSN research presents exciting opportunities, including precise control over chiral structures, the development of novel templating strategies, and the exploration of broader applications. These advancements are expected to drive progress in nanoporous silica technologies and open new frontiers in materials science and nanomedicine. © 2025

关键词： Chiral mesoporous silica nanoparticles (CMSNS) Chirality formation Drug delivery systems Helical structures Surfactant templates