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Enhancement of lactate fraction in poly(lactate-co-3-hydroxybutyrate)biosynthesized by metabolically engineered ***

bioresources and bioprocessing 2024年第1期11卷 1170-1178页

作者： Binghao Zhang Pengye Guo Xinye Sun Yanzhe Shang Yuanchan Luo Hui Wu State Key Laboratory of Bioreactor Engineering Shanghai Frontiers Science Center of Optogenetic Techniques for Cell MetabolismSchool of BiotechnologyEast China University of Science and Technology130 Meilong RoadShanghai 200237China MOE Key Laboratory of Bio-Intelligent Manufacturing School of BioengineeringDalian University of TechnologyDalianChina Shanghai Collaborative Innovation Center for Biomanufacturing Technology 130 Meilong RoadShanghai 200237China Key Laboratory of Bio-based Material Engineering of China National Light Industry Council130 Meilong RoadShanghai 200237China

Poly(lactate-co-3-hydroxybutyrate)[P(LA-co-3HB)]is a high-molecular-weight biomaterial with excellent biocompatibility and *** this study,the properties of P(LA-co-3HB)were examined and found to be affected by its lactate *** efficiency of lactyl-CoA biosynthesis from intracellular lactate significantly affected the microbial synthesis of P(LA-co-3HB).Two CoA transferases from Anaerotignum lactatifermentans and Bacillota bacterium were selected for use in copolymer biosynthesis from 11 *** found that cotAl enhanced the lactate fraction by 31.56%compared to that of the frequently used modified form of propionyl-CoA transferase from Anaerotignum *** addition,utilizing xylose as a favorable carbon source and blocking the lactate degradation pathway further enhanced the lactate fraction to 30.42 mol%and 52.84 mol%,***,when a 5 L bioreactor was used for fermentation utilizing xylose as a carbon source,the engineered strain produced 60.60 wt%P(46.40 mol%LA-co-3HB),which was similar to the results of our flask *** results indicate that the application of new CoA transferases has great potential for the biosynthesis of other lactate-based copolymers.

关键词： Poly(lactate-co-3-hydroxybutyrate) Lactyl-CoA CoA transferases Lactate-based copolymers

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Improvement in the Performance of the Polylactic Acid Composites by Using Deep Eutectic Solvent Treated Pulp Fiber

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Journal of Renewable materials 2021年第11期9卷 1897-1911页

作者： Lei Tan Liangxian Liu Chaodong Liu Weihong Wang Key Laboratory of Bio-Based Material Science and Technology(Ministry of Education) Material Science and Engineering CollegeNortheast Forestry UniversityHarbin150040China

As the most favorable alternative to petroleum-based polymers,polylactic acid(PLA)which is the most promising degradable polymer has attracted increasing ***,the addition of cellulose to improve its strength often results in a reduction in its *** this work,microscale cellulose is first prepared from pulp fibers by using a deep eutectic solvent,and then is used as the reinforcement of PLA.A microcrystalline cellulose(MCC)/PLA sheet with uniform texture is obtained by the solution mixing,melt blending,hot-pressing and cold-pressing *** effects of MCC on the crystallization,thermal stability and mechanical properties of the PLA matrix were *** the addition of 1%cellulose fiber,the tensile strength of MCC/PLA composite sheet increased by 27%,and the elongation at break did not shown an evident *** strength enhancement mechanism was elucidated using scanning electron microscopy,differential scanning calorimetry,and dynamic thermomechanical *** energy dissipation during the deformation process and the compatibility of AMCC and rougher surface of MCC play important role in the strength ***,UV spectroscopy showed that the composite material absorbed some ultraviolet *** results show that the combined use of a deep eutectic solvent and solution mixing is an effective approach for improving the strength of PLA while maintaining its toughness.

关键词： Polylactic acid microcrystalline cellulose deep eutectic solvent mechanical properties

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biodegradable,strong,and clear wood package for plastic alternative

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Nano Research 2024年第9期17卷 8531-8541页

作者： Jianfu Tang Xueqin Fan Haozhou Huang Xiaofei Dong Xueqi Li Peiru Wang Ran Yin Yanjun Xie Jian Li Gang Tan Zhenqian Pang Wentao Gan Key Laboratory of Bio-based Material Science&Technology(Ministry of Education) Northeast Forestry UniversityHarbin 150040China Department of Architecture College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou 310027China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100China Heilongjiang Key Laboratory of Complex Traits and Protein Machines in Organisms Northeast Forestry UniversityHarbin 150040China

Using biodegradable material derived from renewable resources as petroleum-based plastics replacement is a promising way towards sustainable ***,the insufficient mechanical properties and complex manufacturing process of bioplastics still need to be improved for high-quality food ***,we report a top-down strategy to transform natural wood into a clear wood packaging film through scalable delignification and polyvinyl alcohol(PVA)*** wood packaging film demonstrates a laminated structure with completely collapsed cell walls and PVA intertwined together after energy-saving air drying,resulting in high light transmittance with low haze,good mechanical performance,and high barrier performance for oxygen and water *** dynamics simulations reveal the underlying fracture mechanism between cellulose and PVA,which effectively enhances the Young’s modulus and strength of the wood packaging *** findings contribute to the development of biodegradable and strong packaging materials,as well as other food-related applications,using sustainable wood.

关键词： wood food package mechanical enhancement plastic replacement biodegradability

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Nanocarbon catalysts with co-active S−P−C sites enhance metal-free direct oxidation of alcohols

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SusMat 2024年第5期4卷 202-215页

作者： Juan Meng Huidong Liu Jianing Xu Yuhan Lou Haixin Sun Bo Jiang Yongzhuang Liu Hengfei Qin Shuo Dou Haipeng Yu Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbinChina School of Resources and Environmental Engineering Jiangsu University of TechnologyChangzhouChina School of Urban Construction Changzhou UniversityChangzhouChina College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbinChina

In this study,a sulfur–phosphorus co-doped nanocarbon(SPC)catalyst was syn-thesized using a straightforward one-step colloidal carbonization method and demonstrated high performance in the metal-free direct oxidation of alcohols to *** metal-free SPC catalyst showed exceptional efficiency,achiev-ing a conversion rate of 90%for benzyl alcohol and a selectivity of 94%toward benzaldehyde within only 1 h at 130◦***,it displays exceptional cycle stability and a high turnover frequency(17.1×10-3 mol g-1 h-1).Theoretical analysis suggested that the catalyst’s superior performance is attributed to the presence of unsaturated edge defects and S-P-moieties,which increase the density of states at the Fermi level,lower the band gap energy,and promote electron ***,the doping introduces cooperative co-active S-P-C sites,facilitating a synergistic multisite catalytic effect that lowers the energy *** findings represent a significant advancement in the field of metal-free direct alcohol oxidation.

关键词： alcohol oxidation reaction carbon catalysts electronic structures

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Accelerating Electrocatalytic Nitrate Reduction to Ammonia via Weakening of Intermediate Adsorption on Cu-based Catalyst

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Transactions of Tianjin University 2024年第6期30卷 488-497页

作者： Yizhu Chen Ang Ma Lei Chen Xinyang Liu Yan Li Yan Hong Yushuo Zhang Yunyi Liu Lixin Wei Yudong Li Siqi Li Song Liu College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin 150040China School of Physics and Electronic Engineering Harbin Normal UniversityHarbin 150025China Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbin 150040China

Cu-based materials are commonly used in electrocatalytic nitrate reduction reactions(NO 3 RR).NO 3 RR is a“two birds,one stone”approach,simultaneously removing NO 3−pollutants and producing valuable ammonia(NH 3).However,the strong coordination between the NO 3−intermediate and the catalytic active sites seriously hinders the conversion effi ***,we determined that,through encapsulation strategies,the carbon layer could weaken the NO 3−intermediate binding to active sites,resulting in higher NH 3 *** experimentally fabricated electrocatalysts,i.e.,Cu nanoparticles encapsulating(or loaded on)N-doped carbon nanofi bers(NCNFs)called Cu@NCNFs(Cu-NCNFs),using electrostatic *** a result,Cu@NCNFs can achieve NH 3 yields of 17.08 mg/(h·mg cat)at a voltage of−0.84 V and a Faraday effi ciency of 98.15%.Meanwhile,the electrochemical properties of the Cu nanoparticles on the surface of carbon fi bers(Cu-NCNFs)are lower than those of the Cu@*** in situ Raman spectra of Cu@NCNFs and Cu-NCNFs under various reduction potentials during the NO 3 RR process show that catalyst encapsulation within carbon layers can eff ectively reduce the adsorption of N species by the catalyst,thus improving the catalytic performance in the nitrate-to-ammonia catalytic conversion process.

关键词： Electrocatalytic nitrate reduction reactions Ammonia synthesis Copper-based electrocatalysts·Electrostatically spun carbon fi ber Regulated adsorption

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Engineering CuMn Prussian blue analog-shelled nanobox for efficient electrochemical reduction of nitrate to ammonia

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Tungsten 2024年第4期6卷 833-844页

作者： Zi-Yi Yang Yu-Dong Li Dan Liu Mao-Sen Song Yang Gao Qing-Ping Wu En-Shan Han Yan-Zhen He Xiao-Hui Yang School of Chemical Engineering and Technology Hebei University of TechnologyTianjin300130China Key Laboratory of Bio-Based Material Science and Technology Northeast Forestry UniversityHarbin150040China Institute of Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und EnergieHahn-Meitner-Platz 114109BerlinGermany Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing400714China

Electrocatalytic nitrate reduction reaction(ENRR)for ammonia synthesis is a promising strategy to relieve nitration contamination,as well as an alternative to the Haber-Bosch *** blue analogs(PBAs)are expected to be an electrocatalytic material with superior performance owing to their abundant active sites and open channel ***,most reported PBA materials possess low nitrate conversion and ammonia yield rates,which has led to a hindrance in their research of ***,CuMn-PBA-shelled nanoboxes(CuMn-PBA SNBs)synthesized through tannic acid etching and cation exchange approaches are demonstrated for efficient ammonia *** optimal CuMn-PBA SNBs electrode achieves a high nitrate conversion of 91.33%and ammonia selectivity of 98.87%in a 0.2 mol·L^(-1)Na_(2)SO_(4) solution with100×10^(-6) NO_(3)^(-)-N at-1.4 V ***,the CuMn-PBA SNB s electrode exhibits exceptional stability throughout a 30 h electrocatalytic *** outstanding electrochemical performance is attributed to the unique hollow nanobox structure with abundant active sites and high-throughput transport pathways for ions'aspects.

关键词： Electrocatalytic nitrate reduction Ammonia synthesis Prussian blue analogs Acid etching Cation exchange Nanobox

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Dual-functional marigold-like Zn_(x)Cd_(1-x)S homojunction for selective glucose photoreforming with remarkable H_(2)coproduction

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Journal of Energy Chemistry 2023年第4期79卷 158-167页

作者： Fuyan Kang Cai Shi Yeling Zhu Malin Eqi Junming Shi Min Teng Zhanhua Huang Chuanling Si Feng Jiang Jinguang Hu Key Laboratory of Bio-based Material Science and Technology Ministry of EducationMaterial Science and Engineering CollegeNortheast Forestry UniversityHarbin 150040HeilongjiangChina Tianjin Key Laboratory of Pulp and Paper College of Light Industry and EngineeringTianjin University of Science and TechnologyTianjin 300457China Sustainable Functional Biomaterials Lab Department of Wood ScienceUniversity of British Columbia2424 Main MallVancouver V6T 1Z4Canada Department of Chemical and Petroleum Engineering University of Calgary2500 University DriveNWCalgaryAlberta T2N 1N4Canada

The global commitment to pivoting to sustainable energy and products calls for technology development to utilize solar energy for hydrogen(H_(2))and value-added chemicals production by biomass ***,a novel dual-functional marigold-like Zn_(x)Cd_(1-x)S homojunction has been the production of lactic acid with high-yield and H_(2)with high-efficiency by selective glucose *** optimized Zn_(0.3)Cd_(0.7)S exhibits outstanding H_(2)generation(13.64 mmol h^(-1)g^(-1)),glucose conversion(96.40%),and lactic acid yield(76.80%),over 272.80 and 19.21 times higher than that of bare ZnS(0.05 mmol h^(-1)g^(-1))and CdS(0.71 mmol h^(-1)g^(-1))in H_(2)generation,*** marigold-like morphology provides abundant active sites and sufficient substrates accessibility for the photocatalyst,while the specific role of the homojunction formed by hexagonal wurtzite(WZ)and cubic zinc blende(ZB)in photoreforming biomass has been demonstrated by density functional theory(DFT)*** is converted to lactic acid on the WZ surface of Zn_(0.3)Cd_(0.7)S via the photoactive species·O_(2)^(-),while the H_(2)is evolved from protons(H^(+))in H_(2)O on the ZB surface of Zn_(0.3)Cd_(0.7)*** work paves a promising road for the production of sustainable energy and products by integrating photocatalysis and biorefine.

关键词： Zn_(x)Cd_(1-x)S homojunction Selective glucose photoreforming biomass valorization Sustainable H_(2) Photoreforming mechanism

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Short beam shear properties and failure modes of the wood-based X-type lattice sandwich structure

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Journal of Forestry Research 2021年第2期32卷 877-887页

作者： Tengteng Zheng Liuxiao Zou Yingcheng Hu Key Laboratory of Bio-based Material Science and Technology Ministry of EducationNortheast Forestry UniversityHarbin 150040People’s Republic of China

A wood-based X-type lattice sandwich structure was manufactured by insertion-glue *** birch was used as core,and Oriented Strand Board was used as panel of the sandwich *** short beam shear properties and the failure modes of the wood-based X-type lattice sandwich structure with different core direction(vertical and parallel),unit specification(120 mm×60 mm and 60 mm×60 mm),core size(50 mm and 60 mm),and drilling depth(9 mm and 12 mm)were investigated by a short beam shear test and the establishment of a theoretical model to study the equivalent shear modulus and deflection response of the X-type lattice sandwich *** from the short beam shear test and the theoretical model showed that the failure modes of the wood-based X-type lattice sandwich structure were mainly the wrinkling and crushing of the panels under three-point bending *** experimental values of deflection response of various type specimens were higher than the theoretical values of *** the core direction of parallel,the smaller the unit specification is,the shorter the core size is,and the deeper the drilling depth is,the greater the short beam shear properties of the wood-based X-type lattice sandwich structure is.

关键词： X-type Lattice sandwich structure Failure modes Short beam shear properties Theoretical model

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Cocatalysts in photocatalytic methane conversion: recent achievements and prospects

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science China Chemistry 2023年第9期66卷 2532-2557页

作者： Chengcheng Zhang Jing Wang Shenshen Ouyang Hui Song Jinhua Ye Li Shi School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Key Laboratory of Bio-based Polymeric Materials Technology and Application Ningbo Key Laboratory of Polymer MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)Tsukuba 305-0044Japan TJU-NIMS International Collaboration Laboratory School of Material Science and EngineeringTianjin UniversityTianjin 300072China

Photocatalysis, which performed under mild conditions by utilizing solar energy, has become a desirable technology to convert methane into highly valuable chemicals, such as methanol, ethane, and other hydrocarbons. However, pristine photocatalysts still suffer from the low utilization efficiency of solar light and the high recombination rate of photogenerated charge carriers, which exhibit the low activity and selectivity for photocatalytic methane conversion. Loading cocatalysts on photocatalysts is an attractive strategy to manipulate the products' yield and selectivity of photocatalytic methane conversion due to the enhanced charge carrier separation efficiency, extended light absorption and promoted reactant adsorption/desorption kinetics. This review discusses the recent achievements of the cocatalysts for photocatalytic methane conversion reactions. Moreover, the challenges and perspectives for the development of efficient cocatalysts are presented. This review provides considerable guidelines for the design and construction of efficient cocatalysts for photocatalytic methane conversion reactions.

关键词： photocatalysis methane conversion cocatalysts valuable chemicals

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Built-In Electric Field Promotes Spatial Charge Separation in Heterojunctions to Enhance the Performance of Photorefined Xylan

SSRN

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SSRN 2024年

作者： Liu, Yuqi Kang, Fuyan Zhang, Yameng Tian, Jiangyang Qi, Houjuan Huang, Zhanhua Key Laboratory of Bio-based Material Science and Technology Ministry of Education Material Science and Engineering College Northeast Forestry University Harbin150040 China

Photorefining biomass into high value-added chemicals and clean energy is a promising technology to address environmental pollution and energy crisis. Within this work, g-C3N4/Mn0.7Cd0.3S heterostructure (CNMCS) with a strong built-in electric field was investigated as a bifunctional photocatalyst for photoreforming xylan to glyceric acid (GA) and water splitting. The optimized CNMCS exhibited superior performance in the coproduction of GA (77.6% yield) and H2 (2.89 mmol·gcat−1·h−1) without any sacrificial agents. GA yield (2.72 times and 1.67 times) and H2 evolution rate (1.71 times and 32.1 times) were markedly improved compared to Mn0.7Cd0.3S (MCS) and g-C3N4 (CN). The density functional theory (DFT) calculations confirmed the presence of a built-in electric field near the interface of CNMCS, which promoted the spatial separation of photogenerated carriers and thus significantly improved photocatalytic performance. Electron spin resonance (ESR) spectroscopy and radical scavenging experiments revealed that hydroxyl radicals, superoxide radicals, singlet oxygen, photogenerated holes, and photogenerated electrons drove these reactions in this system. This work blazed a new trail for reforming renewable biomass to coproduce high value-added chemicals and clean energy. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions

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