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Controllable design of high-efficiency triboelectric materials by functionalized metal–organic frameworks with a large electronwithdrawing functional group

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Nano Research 2022年第10期15卷 9386-9391页

作者： Rongmei Wen Rui Feng Bo Zhao Jiangfeng Song Liming Fan Junyi Zhai Department of Chemistry College of ScienceNorth University of ChinaTaiyuan 030051China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China College of Chemistry State Key Laboratory of Elemento-Organic ChemistryNankai UniversityTianjin 300071China

Triboelectric nanogenerator(TENG)can directly convert mechanical energy into electric energy.However,the triboelectric materials are limited to the triboelectric series.Here,for the first time,we choose the isostructural UiO-66-X(X=H,NH_(2),NO_(2),and Br)family as triboelectric materials to investigate the underlying relationships between different functional groups and the triboelectric performance of TENG.Unlike traditional triboelectric material organic polymers,metal–organic frameworks(MOFs)can be oriented design synthesis and functionalized with various functional groups.The results demonstrate that the largest output voltage and current are from UiO-66-NO_(2) TENG,and are about 23.79 V and 0.29μA,which are 3.19 and 4.14 times over that of the UiO-66 TENG,respectively.The working mechanism of the MOF TENG was discussed in depth through experiments and theoretical calculations.This work proves a novel strategy to obtain high output properties by functionalized MOFs with large electron-withdrawing functional groups and promising guidance for the choice of high-efficiency triboelectric materials.

关键词： triboelectric nanogenerator metal-organic frameworks UiO-66 functional group isostructural

functional group differentiation of isomeric solvents enables distinct zinc anode chemistry

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Nano Research Energy 2023年第2期2卷 218-228页

作者： Chao Liu Qing Li Yilun Lin Zhiquan Wei Yihan Yang Cuiping Han Minshen Zhu Haiyan Zhang Hongfei Li School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China Songshan Lake Materials Laboratory Dongguan 523808China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China School of System Design and Intelligent Manufacturing Southern University of Science and TechnologyShenzhen 518055China Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Research Center for Materials Architecturesand Integration of Nanomembranes(MAIN)TU ChemnitzChemnitz 09126Germany

Electrolytes hold the key to realizing reliable zinc(Zn)anodes.Divergent organic molecules have been proven effective in stabilizing Zn anodes;however,irrational comparisons exist due to the uncontrolled molecular weights and functional group amounts.In this work,two“isomeric molecules”:1,2-dimethoxyethane(DME)and 1-methoxy-2-propanol(PM),with identical molecular weights but different functional groups,have been studied as co-solvents in electrolytes,which have delivered distinct electrochemical performance.Experimental and simulative study indicates the dipole moment induced by the hydroxyl groups in PM(higher molecular polarity than ether groups in DME)reconstructs the space charge region,enhances the concentration of Zn^(2+)in the vicinity of Zn anodes,and in-situ derives different solid electrolyte interphase(SEI)models and electrode-electrolyte interfaces,resulting in exceptional cycling stability.Remarkably,the Zn||Cu cell with PM worked over 2000 cycles with high Coulombic efficiency(CE)of 99.7%.The Zn||Zn symmetric cell cycled over 2000 h at 1 mA·cm^(−2),and showed excellent stability at an ultrahigh current density of 10 mA·cm^(−2)and capacity of 20 mAh·cm^(−2)over 200 h(depth of discharge,DOD of 70%).The Zn||sodium vanadate pouch cell with a high mass loading of 6.3 mg·cm^(−2)and a high capacity of 24 mAh demonstrates superior cyclability after 570 h.This work can be a good starting point to provide reliable guidance on electrolyte design for practical aqueous Zn batteries.

关键词： functional group isomeric solvents zinc anode solid electrolyte interphase(SEI)model

Primitive functional groups directed distinct photocatalytic performance of imine-linked donor-acceptor covalent organic frameworks

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Nano Research 2024年第6期17卷 4994-5001页

作者： Xitong Ren Jiajie Sun Yusen Li Feng Bai Key Laboratory for Special functional Materials of Ministry of Education National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China School of Physics and Electronics Henan UniversityKaifeng 475004China

The combination of donor-acceptor(D-A)structures presents a viable strategy for fabricating covalent organic frameworks(COFs)with exceptional photocatalytic performances.Nevertheless,the selection of functional groups on donor or acceptor building blocks and their effect on the macroscopic properties of COFs are ambiguous.In this study,we tactfully synthesized a pair of Py-DBT-COFs from the same pyrene(Py)donor and 4,7-diphenylbenzo[c][1,2,5]thiadiazole(DBT)acceptor cores with distinct primitive functional groups.The primitive functional groups of building units determine the photocatalytic properties of corresponding Py-DBT-COFs.Specifically,Py-C-DBT-COF synthesized from Py-4CHO and DBT-2NH_(2)showcases a splendid H_(2)evolution rate as high as 21,377.7μmol/(g·h)(with 5 wt.%Pt)originating from better charge transfer capacity,which is significantly superior to that of Py-N-DBT-COF constructed from Py-4NH_(2)and DBT-2CHO.The distinct photocatalytic performances of the two COFs are demonstrated to originate from the different charge separation and transfer capabilities.This work supplies a new avenue for optimizing the photocatalytic performance of D-A COFs from the perspective of primitive functional group selections.

关键词： covalent organic frameworks functional group donor-acceptor photocatalysis

Effect of various aromatic compounds with different functional groups on enzymatic hydrolysis of microcrystalline cellulose and alkaline pretreated wheat straw

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Journal of Bioresources and Bioproducts 2024年第2期9卷 211-221页

作者： Yufeng Yuan Xinyu Guo Bo Jiang Wenjuan Wu Tingwei Zhang Michael Sweeney Mehraj Ahmad Yongcan Jin Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsJiangsu Provincial Key Lab of Pulp and Paper Science and TechnologyNanjing Forestry UniversityNanjing 210037China School of Chemistry and Chemical Engineering Queen’s University BelfastBelfast BT71NNNorthern Ireland United Kingdom Department of Food Science and Engineering College of Light Industry and Food EngineeringNanjing Forestry UniversityNanjing 210037China

Low molecular aromatic compounds are detrimental to the enzymatic hydrolysis of lignocellu-lose.However,the specific role of their functional groups remains unclear.Here,a series of nine aromatic compounds as additives were tested to understand their effect on the hydrolysis yield of microcrystalline cellulose(MCC)and alkaline pretreated wheat straw.Based on the results,the inhibition of aldehyde groups on MCC was greater than that of carboxyl groups,whereas for the alkaline pretreated wheat straw case,the inhibitory effect of aldehyde groups was lower than that of carboxyl groups.Increased methoxyl groups of aromatic compounds reduced the inhibitory ef-fect on enzymatic hydrolysis of both substrates.Stronger inhibition of aromatic compounds on MCC hydrolysis was detected in comparison with the alkaline pretreated wheat straw,indicating that the substrate lignin can offset the inhibition to a certain extent.Among all aromatic com-pounds,syringaldehyde with one aldehyde group and two methoxyl groups improved the glucan conversion of the alkaline pretreated wheat straw.

关键词： Aromatic compound functional group Enzymatic hydrolysis Alkaline pretreated wheat straw Microcrystalline cellulose

functional groups and seasonal diversity of crustacean zooplankton in adjacent waters of Haizhou Bay,South Yellow Sea

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Journal of Oceanology and Limnology 2023年第3期41卷 1007-1023页

作者： Zeqi ZHENG Shunan FU Yixuan LI Ruping GE Hongju CHEN Zhenjiang YE Yunyun ZHUANG Guangxing LIU Key Laboratory of Marine Environment Ministry of EducationOcean University of ChinaQingdao 266100China Marine Ecology and Environmental Science Laboratory Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Fisheries College Ocean University of ChinaQingdao 266003China

Zooplankton are important linkages in the food web and can respond nonlinearly to environmental changes.Marine organisms thrive from spring to summer.Thus,it is crucial to understand how ecological functions of zooplankton communities may shift under seasonal environmental changes during this period.Samples were collected from May to August(May,June-Ⅰ,June-Ⅱ,July-Ⅰ,July-Ⅱ,and August)in 2018 in Haizhou Bay,Jiangsu,East China for zooplankton and environmental variables.Crustaceans accounted for 75 out of 134 zooplankton taxa and 91.8%of total zooplankton abundance.The average abundance of crustacean varied between 2824.6±635.4 inds./m3 in July-Ⅱand 6502.7±1008.8 inds./m3 in June-Ⅱ.Multivariate analyses results showed that the dissimilarity of community increased gradually in the time series.Body length,feeding type,trophic group,and reproduction mode were used to investigate crustacean community functions.Trait-based functional groups contained species with similar ecological roles.functional diversity fused the differences of species and trait.The proportion of large-sized species(2-5 mm)decreased with the increasing proportion of medium-sized species(1-2 mm).The proportion of current feeders increased with the drop in the proportion of mixed feeders.Parthenogenesis species increased with decreasing free spawners,and omnivores-carnivores increased with decreasing omnivoresherbivores.Generalized additive models suggested that temperature was the main driver of variations in crustacean zooplankton function.Seven identified functional groups varied with increasing temperature.Omnivorous-herbivorous copepods declined(90.0%-68.0%),whereas the parthenogenetic cladocerans increased(0-24.1%).The small egg-brooding ambush copepods fluctuated(6.5%-9.3%)with increasing water temperature.The other functional groups changed slightly.functional diversity also varied according to temperature changes.The community structure and ecological function of crustacean zooplankton community showed gradual changes with increasing temperat

关键词： zooplankton trait functional group diversity Yellow Sea Haizhou Bay

Analysis of functional group of Alkaline Phosphatase from DFRKN-1

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Plant Diseases and Pests 2013年第1期4卷 39-41,44页

作者： Ma Aiying Zhang Kaowen Yang Zhenhua Mou Yi College of Biological Sciences and Engineering North University for Nationalities

To further understand characters of alkaline phosphatase and provide reference for in-depth study of the mechanism of NFRKN-1 invading into knot nem-atode and its development and utilization, the effects of metal ions, organic reagents and chemical modifier on activity of alkaline phosphatase from DFRKN-1 were analyzed in the paper. The results showed that Mg^2＋ , Ba^2＋ and K^＋ under certain concentrations activated enzyme significantly and Zn^2＋ could inhibit enzyme activ-ity. Methanol, ethanol and ethylene glycol inhibited enzyme activity in similar degrees. Histidine residue and Lysine residue are essential groups of alkaline pbos-phatase; sulflaydryl of cysteine was not an essential group, but disulfide bond played an important role in maintaining the active conformation of alkaline phospha-tase.

关键词： Destroying fungi of root-knotnematode-1 （ DFRKN-1 ） Alkaline phosphatase Metal ion Organic reagent functional group

Effects of natural forest conversion and plantation tree species composition on soil macrofauna communities in Northeast China mountains

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林业研究:英文版 2023年第5期34卷 1475-1489页

作者： Shuangjiao Ma Qingcheng Wang Yong Zhang Limei Yan Donghai Cui Liqing Xu Key Laboratory for Sustainable Forest Ecosystem Management−Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China

As primary and secondary forests are being replaced by plantations across the globe,the soil macrofauna community structure is also affected,but little is known about the impact of mixed culture plantations compared with monocultures on the soil macrofauna.To determine the impact of forest conversion on soil macrofauna,we surveyed the soil macrofauna in two broad-leaved and three coniferous monoculture stands and four coniferous-broadleaved mixed stands,and in adjacent reserved secondary stands as a reference.Soil macro fauna community composition was significant affected by forest type,season and their interaction(P<0.05).The abundance,taxa richness and diversity of soil macro fauna changed to different degrees depending on the plantation type.Broadleaved monoculture stands and secondary stands had similar macrofauna abundance and taxa richness,but values were lower in coniferous stands than in secondary stands.The Shannon index for macrofauna in coniferous stands was also the lowest,but the Pielou index did not differ between forest types.The negative effects of the conifer monoculture on soil macro fauna were not present in the mixed stands with broad-leaved trees.Forest conversion impacted soil properties;soil moisture,NO_(3)^(-),and pH were significant drivers of soil macrofauna community structure.The impact of forest conversion on soil macrofauna was closely dependent on tree species composition and diversity.The macro fauna community structure in the broadleaved and the mixed stands were relatively similar to that in the natural forest,and thus recommended for forest conversion in the study area.

关键词： Forest conversion Plantation forest Tree species composition Soil macrofauna Diversity functional group

Trait-based approach revealed the seasonal variation of mesozooplankton functional groups in the South Yellow Sea

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Marine Life Science & Technology 2023年第1期5卷 126-140页

作者： Zhishuang Zhang Hongju Chen Yixuan Li Ruping Ge Guangxing Liu Shaukat Ali Yunyun Zhuang Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao266100China Marine Ecology and Environmental Science Laboratory Pilot National Laboratory for Marine Science and TechnologyQingdao266200China Department of Environmental Sciences Karakoram International UniversityGilgit15100Pakistan

functional traits determine the fitness of organisms and mirror their ecological functions.Although trait-based approaches provide ecological insights,it is underexploited for marine zooplankton,particularly with respect to seasonal variation.Here,based on four major functional traits,including body length,feeding type,trophic group,and reproduction mode,we quantified the seasonal variations of mesozooplankton functional groups in the South Yellow Sea(SYS)in the spring,summer,and autumn of 2018.Strong seasonal dynamics were identified for all traits but patterns varied among traits.Small zooplankton(47.7–88.6%),omnivores–herbivores(81.3–97.6%),and free spawners(54.8–92.5%)dominated in three seasons,while ambush feeders and current feeders dominated in spring(45.7%),and autumn(73.4%),respectively.Cluster analysis of the functional traits showed that the mesozooplankton in the SYS can be classified into eight functional groups.The biogeographic and seasonal variations of functional groups can be partially explained by environmental drivers.group 1,represented by omnivores–herbivores,was the most dominant functional group,the abundance of which peaked in spring and was positively correlated with chlorophyll a concentration,indicating its close association with phytoplankton dynamics.The contribution of giant,active ambush carnivores,passive ambush carnivore jellyfish,current omnivores–detritivores,and parthenogenetic cladocerans increased with sea surface temperature.The proportion of giant,active ambush carnivores and active ambush omnivore–carnivore copepods decreased with salinity in autumn.This study presents a new perspective for understanding the dynamics of zooplankton and paves the way for further research on the functional diversity of zooplankton in the SYS.

关键词： Zooplankton Southern Yellow Sea functional trait functional group Seasonal variation

Effect of functional groups on tribological properties of lubricants and mechanism investigation

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Friction 2023年第6期11卷 911-926页

作者： Hongxiang YU Haijie CHEN Zhiwen ZHENG Dan QIAO Dapeng FENG Zhenbin GONG Guojun DONG State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Nine organic compounds were utilized as model lubricants to investigate the impact of functional groups on tribological performances.Nonanoic Acid with carboxyl showed the best lubrication properties,and fluid film and tribofilm were coexistent in its friction test,bringing a low friction coefficient and wear rate.In addition,the lubricant with low friction coefficient corresponded to high adsorption energy in density functional theory(DFT)calculations.And the lubricant forming adsorption film with large surface energy displayed small wear rate in friction test.Moreover,adsorption energies positively correlated surface energies.Based on the experimental results,the action mechanism of functional groups on tribological properties of lubricants was proposed.Various functional groups make lubricant molecules show different adsorption energies and surface energies.Lubricant molecules with high adsorption energy are more likely to adsorb on substrates and form a vertical monolayer,which can maintain a regular molecular brush structure during friction and bring a low friction coefficient.And lubricant molecules with high surface energy may be more prone having tribochemical reactions during friction and forming protective tribofilm,which leads to a low wear rate.

关键词： functional group tribological property adsorption energy surface energy action mechanism