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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

Corrigendum to "Multifunctional films based on tannic acid-coated cellulose nanocrystals and zinc-coating reinforced sodium carboxymethyl cellulose/polyvinyl alcohol for food active packaging" [Int. J. biol. Macromol. 302 (2025) 140587]

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International journal of biological macromolecules 2025年第PT 2期305卷 141195页

作者： Xiaodong Wang Jun Shen Dezong Zheng Fei Qi Lin Li Key Lab of Bio-based Material Science and Technology (Ministry of Education) College of Material Science and Engineering Northeast Forestry University Harbin 150040 China. Key Lab of Bio-based Material Science and Technology (Ministry of Education) College of Material Science and Engineering Northeast Forestry University Harbin 150040 China. Electronic address: shenjunr@***.

Facile Construction of a Micro-Nano Structure of Green Polyvinyl Alcohol-based Composite Aerogel with Superior Mechanical Properties, Thermal Insulation And Fire Safety

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SSRN 2025年

作者： Gao, Suliang Wang, Ruiping Zhang, Hui Xu, Miaojun Tao, Bin Xue, Han Liu, Lubin Li, Sheng Li, Bin Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Hexing Road 26 Harbin150040 China Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University Harbin150040 China

In light of the "dual-carbon" targets, traditional thermal insulators have failed to meet the increasingly stringent demands for green sustainability and fire safety. In this work, a green polyvinyl alcohol (PVA)-based composite aerogel was successfully prepared using biomass-derive PVA and nano-silica sol as raw materials. The resultant aerogel presented a distinctive micro-nano composite hierarchical three-dimensional (3D) network structures, and diameter of the micro-scaled big pores ranged from 6.0 μm to 48.0 μm. Additionally, a large number of nano-scaled pores with an average diameter of 22.79 nm existed in the micro-scaled big pores, and the total pore volume of 0.66 cm3·g-1. Induced the unique structure of the aerogel, it exhibited a low bulk density of 0.081 g·cm-3and a high porosity of 94.97%, respectively, while its thermal conductivity was only 37.6 mW·m-1·K-1. Besides, compressive strength and specific modulus of the aerogel significantly increased to 3.98 MPa and 27.41 MPa·cm3·g-1, respectively. The composite aerogel achieved UL-94 V-0 rating during vertical burning tests with a limit oxygen index of 26.5%, and the release of heat, smoke and toxic gases were obviously lower than that of PVOH aerogel. This work provided an alternative approach for constructing the aerogels with high performance as well as superior fire safety, thermal insulation and mechanical performance. © 2025, The Authors. All rights reserved.

关键词： Compressive strength

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

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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

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

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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

Reprogramming the metabolism of Synechocystis PCC 6803 by regulating the plastoquinone biosynthesis

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Synthetic and Systems biotechnology 2021年第4期6卷 351-359页

作者： Jianhua Fan Dongqing Zhou Cheng Chen Ju Wu Hui Wu State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai200237PR China Department of Applied Biology East China University of Science and TechnologyShanghai200237PR China Shanghai Collaborative Innovation Center for Biomanufacturing Technology 130 Meilong RoadShanghai200237China Key Laboratory of Bio-based Material Engineering of China National Light Industry Council 130 Meilong RoadShanghai200237China

Cyanobacteria can utilize CO2 or even N2 to produce a variety of high value-added products ***(PQ)is an important electron carrier in both of the photosynthetic and respiratory electron transport *** the content of PQ,as well as their redox state,have an important effect on physiology and metabolism,there are relatively few studies on the synthesis of PQ and its related metabolic regulation mechanism in photosynthetic *** this study,the strategies of overexpression of Geranyl diphosphate:4-hydroxybenzoate geranyltransferase(lepgt)and addition of 4-hydroxybenzoate(4-HB)as the quinone ring precursor were adopted to regulate the biosynthesis of PQ in Synechocystis PCC *** with the analysis the photosystem activity,respiration rate and metabolic components,we found the changes of intracellular PQ reprogrammed the metabolism of Synechocystis PCC *** results showed that the overexpression of lepgt reduced PQ content dramatically,by 22.18%.Interestingly,both of the photosynthesis and respiration rate were *** addition,the intracellular lipid and protein contents were significantly ***,the addition of low concentrations of 4-HB enhanced the biosynthesis of PQ,and the intracellular PQ contents were increased by 14.76%-70.86%in different *** of 4-HB can regulate the photosystem efficiency and respiration and reprogram the metabolism of Synechocystis PCC 6803 *** a word,regulating the PQ biosynthesis provided a novel idea for promoting the reprogramming the physiology and metabolism of Synechocystis.

关键词： Cyanobacteria Plastoquinone LePGT 4-HB Metabolic rewiring

Construction of Moiré-Like Tio2/Polypyrrole Electrodes for High Performance Photo-Assisted Supercapacitors

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SSRN 2024年

作者： Cai, Hanwen Li, Yudong Liu, Dan Yang, Xiaohui Zhou, Desheng Han, Enshan Li, Xinhao Li, Qingyue He, Yanzhen School of Chemical Engineering and Technology Hebei University of Technology Tianjin300130 China Hebei Key Laboratory of Functional Polymers 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 School of Energy Science and Engineering Harbin Institute of Technology Harbin150001 China

There is currently a need for research into using external energy to increase the performance of the supercapacitor in energy storage systems because of their poor energy density. This paper reports the effective creation of photo-assisted supercapacitors with moiré-like morphology using polypyrrole (PPy) and titanium dioxide nano powder to replicate the surface of inexpensive and widely available CD discs. The composite material combines the moiré-like superstructure's strong light trapping property with titanium dioxide's high photo-sensitivity, achieving the aims of boosting light absorption, extending the optical route, and improving capacitor performance under light. By combining morphology construction and external energy interventions to improve capacitor performance, the specific capacitance under light is 509.0 F g-1 at 1 A g-1, 13.1% higher than the same material without moiré-like morphology (449.9 F g-1). When assemble into a sandwich-structured symmetric supercapacitor, it has an area specific capacitance of 99.42 mF cm-2 and an energy density of 7.28 Wh kg-1 at a power density of 217.4 W kg-1, outperforming typical photo-assisted supercapacitors. The current work suggests a practical and straightforward method for increasing the light absorption efficiency and performance of photo-assisted supercapacitors. © 2024, The Authors. All rights reserved.

关键词： Morphology

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

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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

biomimetic Wood-Confined Hydrogel Ion Channel for Flexible Supercapacitors

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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

Gypsum Composites Reinforced by Hemp Fibers Via Enhanced Interfacial Compatibility

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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