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Mof-on-Mof-Derived Cuo@In2o3 S-Scheme Heterojunction with Core-Shell Structure for Efficient Photocatalytic Co2 Reduction

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SSRN 2023年

作者： Liu, Xing Wu, Yuhan Li, Yudong Yang, Xiaohui Ma, Qinghai Luo, Juhua 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 Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences No. 266 Fangzheng Avenue Beibei District Chongqing400714 China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China

Herein, a MOF-on-MOF-derived In2O3 nanosheets encapsulating CuO ortho-octahedral core-shell structure CuO@In2O3 S-Scheme heterojunction composite was designed and prepared by a new strategy of interfacial engineering integrating optical and catalytic activity centers, and endowed with the catalyst's dual properties of both highly efficient light absorption and efficient charge separation. The In2O3 shell wraps around the CuO core in a tight coaxial contact, allowing the two to have the largest contact surface thus effectively promoting the transport of electrons and holes separated at the interface. More importantly, CuO@In2O3 formed a binuclear center could enhance the CO2 adsorption to facilitate the subsequent catalytic reaction and promote the charge transfer through Cu-O-In bonds. The successful construction of S-Scheme heterojunction not only promotes the spatial separation of electron-hole pairs, but also maintains the strongest redox potentials of CuO and In2O3 at the conduction and valence band positions. Notably, the intermediates in the CO2 photoreduction process were probed by in situ infrared spectroscopy and a possible photocatalytic mechanism was hypothesized. Under visible light irradiation, the CuO@In2O3 rates of photocatalytic reduction of CO2 to produce CH4 and CO were 190.32 μmol g-1 h-1 and 500.46 μmol g-1 h-1, which are 2.1, 10.3 times and 2.4, 7.9 times higher than pristine CuO and In2O3, respectively. This work provides a feasible strategy for the design and synthesis of binuclear-centered photocatalysts with interfacially engineered modulation and application to the photocatalytic reduction of CO2. © 2023, The Authors. All rights reserved.

关键词： Heterojunctions

Effects of Different Oxidation Systems on the Interfacial Properties of Bamboo Fiber/Epoxy Resin Composites

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SSRN 2023年

作者： Ding, Runzi Liu, Xueying Yu, Haijiao Shi, Sheldon Q. Han, Guangping Cheng, Wanli Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Harbin150040 China Mechanical Engineering Department University of North Texas UNT Discovery Park 3940 North Elm St. Suite F101P TX76207-7102 United States

The objective of this study is improving the interfacial properties of bamboo fabric (BF)/epoxy (EP) composites to enhance their mechanical properties. BF was treated with 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation system and N-hydroxyphthalimide (NHPI) oxidation system, respectively, to obtain BFO- T and BFO- N oxidation products with different surface morphologies. The effects of different oxidation treatments on the tensile strength (σc) and elongation at break (Εc) of the composites were evaluated. Compared to the untreated BF/EP samples, the σc of BFO- T/EP was increased by 56.9% while the increase in Εc change was not significant. The σc of BFO- N/EP was increased by 30.1%, but the improvement of Εc reached 473.7%. The results of single-yarn pull-out tests and atomic force microscopy indicated that appropriately sized grooves could be the key to the strength increase of the two-phase interface. The larger size of the grooves allows resin to infiltrate and fill the voids, forming occlusal structures that strengthen the interfacial bonding. Small-sized grooves are not conducive to resin impregnation, and therefore voids are formed at the interface between the two phases, which impedes load transfer. © 2023, The Authors. All rights reserved.

关键词： Epoxy composites

Converting a Dilute Slurry of Hollow Tube-like Papermaking Fibers into Dynamic Hydrogels

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Journal of bioresources and bioproducts 2019年第4期4卷 214-221页

作者： Zhongfei YUAN Hongjia LIN Xueren QIAN Jing SHEN Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040China

Commercially,assembly-directed packing of hollow tube-like papermaking fibers with widths of roughly 10–50μm)into sustainable microfibrous bioassemblies(i.e.,paper-based products)starts with a dilute fiber *** this process,a huge amount of water is required to disperse and transport fibers,which also facilitates colloidal interactions and formation of interfiber *** form bioassemblies in their dry states,unit operations associated with dewatering and drying are routine practices,and treatment of the generated wastewater is a *** herein present a facile,easily scalable concept of converting fiber slurry into dynamic hydrogels by using chemical additives(similar to papermaking wet-end additives),but without water *** used a typical group of additives as an example in an attempt to demonstrate the applicability of the *** boron-based dynamic chemistry as a key theoretical foundation,the combination of crosslinking and hydrogen bonding can lead to the formation of phase-reversible,self-healable,and stretchable ***,the characteristics of hydrogels are facilely tunable,and process parameters such as polymer dosage are rather *** is worth noting that fibers can act as a structural skeleton or mechanical support for tailorable design of *** concept demonstrated in this study provides insights into value-added utilization of mass-producible biopolymeric fibers in accordance with existing industrial ***-based hydrogels would find use in diversified applications:toys,3D/4D printing materials,soft robots,drug delivery systems,among others.

关键词： papermaking fibers colloidal interactions dynamic hydrogels self-healability value-added applications

Compressive Behavior of Wood-based 2-D Lattice Structure under Multivariable Analysis

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Journal of bioresources and bioproducts 2019年第2期4卷 119-129页

作者： Yanxia FENG Mengyuan WANG Shaochen HU Lili JIA Jihe CHEN Tianshi FENG Yingcheng HU Key Laboratory of Bio-based Material Science and Technology of Ministry of Education of China College of Material Science and EngineeringNortheast Forestry UniversityHarbin 150040Chin

In order to optimize the out-of-plane compression performance of the wood structure,wood-based 2-D lattice structures were designed and manufactured with oriented strand board as the panel and birch round stick as the core by using a simple insert-glue *** this experiment,the different thicknesses of the upper and lower panels,the different shavings arrangement directions of the upper and lower panels and the different configurations of the specimens were used to analyze the compression performance of the specimens under multivariable *** the combination of experimental test and theoretical analysis,we analyzed and compared different failure types of the structure and multiple compression *** results showed that the shavings arrangement direction of the panel has a more important influence on the whole specimen than the thickness of the panel,especially the transverse shavings of the panel can withstand greater shear stress than the longitudinal shavings for a specimen.

关键词： 2-D lattice structure compressive behavior multivariable analysis insert-glue method

Boosting Electricity Generation of Non-Classical Electroactive Microorganisms Enabled by Carbon Dots

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SSRN 2022年

作者： Zhang, Siyu Zhao, Xinpeng Guo, Xinqi Zhang, Gaoqi Li, Tianchong Xu, Shiyu Zhao, Yufu Li, Jian Liu, Shouxin Chen, Zhijun Li, Shujun Yang, Chenhui Engineering Research Center of Advanced Wooden Materials Key Laboratory of Bio-based Material Science & Technology of Ministry of Education Northeast Forestry University Harbin150040 China Academy of Quality Inspection and Research Heilongjiang Province Harbin150028 China

Producing electricity via microorganisms is promising as sustainable and cheap energy supplier. However, most of the reported classical electroactive microorganisms are unusual in the environment, hindering their practical application. Here, we used carbon dots (CDs) to boost the power generation of common in the natural environment, but non-classical electroactive microorganisms, such as Escherichia coli and Staphylococcus aureus. The CDs, which have good biocompatibility and high electron transfer, are taken up by bacterial cells and enable electrons to migrate rapidly to the ambient electrode because of the formation of robust electron transfer networks. The CDs promote electrochemical redox activity and increase the internal charge generation, as well as reduce the electrochemical impedance of the bacteria. As a result, the CDs facilitate rapid and high power generation in the microbial chemical cells and microbial fuel cells, with a nearly 94-fold and 172-fold improvement in current and power output compared with unmodified Escherichia coli. This work offers an important strategy for enhancing generation of bioelectricity and also facilitates functional optimization of technologies that depend on microbial electron transfer. © 2022, The Authors. All rights reserved.

关键词： Microbial fuel cells

Recent progress in perovskite solar cells:from device to commercialization

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science China Chemistry 2022年第12期65卷 2369-2416页

作者： Xinhui Luo Xuesong Lin Feng Gao Yang Zhao Xiaodong Li Liqing Zhan Zexiong Qiu Jin Wang Cong Chen Lei Meng Xiaofeng Gao Yu Zhang Zijian Huang Rundong Fan Huifen Liu Yanrun Chen Xiaoxue Ren Jiahong Tang Chun-Hao Chen Dong Yang Yongguang Tu Xiao Liu Dongxue Liu Qing Zhao Jingbi You Junfeng Fang Yongzhen Wu Hongwei Han Xiaodan Zhang Dewei Zhao Fuzhi Huang Huanping Zhou Yongbo Yuan Qi Chen Zhaokui Wang Shengzhong(Frank)Liu Rui Zhu Jotaro Nakazaki Yongfang Li Liyuan Han State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Physics and Electronic Science Engineering Research Center of Nanophotonics&Advanced InstrumentMinistry of EducationEast China Normal UniversityShanghai 200241China Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterSolar Energy Research CenterNankai UniversityTianjin 300350China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationSchool of Materials Science and EngineeringPeking UniversityBeijing 100871China School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China Experimental Center for Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Jia

Perovskite solar cells(PSCs) are undergoing rapid development and the power conversion efficiency reaches 25.7% which attracts increasing attention on their commercialization *** this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and ***,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future.

关键词： perovskite solar cells device engineering stability application

Safe and economical preparation of amino acid-derived bio-based triazine char-forming agent for efficient intumescent flame retardant polypropylene

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Construction and Building materials 2025年 484卷

作者： Xu, Yue Hu, Haojie Tao, Bin Yin, Ru Liu, Lubin Li, Bin 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 Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin150040 China National and Local Joint Engineering Laboratory for Ecological Utilization of Biological Resources Northeast Forestry University Harbin150040 China

Triazine intumescent flame retardant (IFR) PP composites have been widely used in electronic appliances, rail transit, and aerospace fields due to their low smoke, high efficiency and environmental friendliness. However, with the increasing attention to safe production and sustainable development, the green and safe synthesis and biomaterialization of traditional triazine char-forming agents have received extensive attention. Herein, a bio-based triazine char-forming agent N-propionyltriazine-ethylenediamine copolymer (PTEC) was successfully prepared by bio-based β-alanine and cyanuric chloride as raw materials under a pure water system for the first time. A novel bio-based IFR (BIFR) system was constructed with ammonium polyphosphate. Only 24 wt% BIFR make PP pass the UL-94 V-0 rating, and the LOI of PP/BIFR was improved to 29.7 %. Compared to pure PP, the smoke and heat release rate of PP/BIFR composites were decreased by 54.5 % and 76.2 %, respectively. The introduction of BIFR promoted the dehydration and charring of PP composites, and released many inert gases during pyrolysis, which led to the rapid expansion of composites. The formed dense and high-strength char layer exerted excellent shielding effect in the condensed phase. In addition, the PP/BIFR composites retained excellent mechanical properties, and the flexural strength and ductility were significantly improved with the addition of BIFR. This study provided a new way for the safe production and biomaterialization of triazine char-forming agents, and the prepared bio-based PP composites with excellent flame retardancy and mechanical properties showed a great application prospect in construction, building materials and other emerging fields. © 2025 Elsevier Ltd

关键词： Bending strength

Preparation of C@Cuni/Tio2 for Photocatalytic Degradation of Dyes and Antibiotics Under Visible Light Irradiation

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SSRN 2023年

作者： Yang, Yunfei Shen, Hongfang Ma, Congcong Ma, Bo Lu, Youjun Wang, Yanmin School of Materials Science & Engineering North Minzu University Yinchuan750021 China National and Local Joint Engineering Research Center of Advanced Carbon-Based Ceramics Preparation Technology Yinchuan750021 China Key Lab of Powder Material & Advance Ceramics Yinchuan750021 China School of Materials Science & Engineering South China University of Technology Guangzhou510640 China

A composite with carbon-coated CuNi nanoparticles and TiO2 nanotubes (C@CuNi/TiO2) was prepared via microwave hydrothermal treatment and subsequent carbothermal in-situ reduction. The structure, morphology and surface chemical composition were investigated by XRD, SEM, TEM, and XPS. The results show that a two-dimensional structure of composite C@CuNi/TiO2 can be formed under microwave hydrothermal alkali stripping. According to the results of transient photocurrent response and electrochemical impedance under visible light illumination, the composite C@CuNi/TiO2 has a lower electrons-holes recombination and a smaller surface resistance rather than the composites C@TiO2, C@Cu/TiO2 and C@Ni/TiO2. The composite photocatalyst with a molar ratio of CuNi nanoparticles to TiO2 nanotubes of 2 % has a superior visible light catalytic activity in photodecomposition of organic dyes (i.e., rhodamine B, methylene blue and methyl orange), and antibiotics like tetracycline and levofloxacin after 2-h visible light illumination. The activity remains > 79% after five cycles of photocatalysis. CuNi nanoparticles capture and enrich the photoinduced electrons due to the photoexcitation in TiO2 nanotubes, and a localized surface plasma resonance (LSPR) effect reduces a photogenerated electrons/holes recombination rate and an electron transport resistance in the composite photocatalyst, thus enhancing the photocatalytic activity. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

Interface engineering of Co(OH)2@CN p-n heterojunction for enhanced photocatalytic xylose/xylan oxidation and CO2 reduction

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SSRN 2024年

作者： Ling, Weikang Ma, Jiliang Jiang, Weikun Wei, Huanqiu Ren, Yuchen Hong, Min Kong, Lingzhao Sun, Runcang Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery College of Light Industry and Chemical Engineering Dalian Polytechnic University Dalian116034 China State Key Laboratory of Bio-based Materials and Green Papermaking Key Laboratory of Pulp & Paper Science and Technology of Shandong Province Ministry of Education Qilu University of Technology Shandong Academy of Sciences Jinan250353 China Centre for Future Materials School of Engineering University of Southern Queensland Springfield CentralQLD4300 Australia School of Environmental Science and Engineering Suzhou University of Science and Technology Jiangsu Suzhou China China

The construction of p-n heterojunction is considered a prominent method for promoting efficient separation/migration of photoinduced carriers, thereby enhancing photocatalytic performance. Herein, a series of nanoflower spherical Co(OH)2@CN-x p-n heterojunction photocatalysts were fabricated using a simplified one-step hydrothermal strategy. Notably, Co(OH)2@CN-2 exhibited optimal performance, showcasing a CO evolution rate of 46.2 μmol g-1 h-1 and a xylonic acid yield of 69.9%. These values are 14.7/3.7 and 2.8/2.4 times higher than those of pristine CN and Co(OH)2, respectively. Additionally, Co(OH)2@CN-2 demonstrated excellent recyclability and chemical stability. Comparative experiments, coupled with 13CO2-labelling testing, confirmed the carbon sources of the obtained CO (72.3% from CO2 reduction and 27.7% from xylose oxidation). The charge transfer mechanism in Co(OH)2@CN-x p-n heterojunctions was systematically elucidated using in-situ X-ray photoelectron spectroscopy and density functional theory calculations. This work presents a practical approach for constructing p-n heterojunction photocatalysts to enhance photocatalytic biomass oxidation coupled with CO2 reduction. © 2024, The Authors. All rights reserved.

关键词： Density functional theory