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| 1 | Tribological properties of copper matrix composites reinforced with homogeneously dispersed graphene nanosheets显示文摘Graphene reinforced copper matrix composites(Gr/Cu) were fabricated by electrostatic self-assembly and powder metallurgy. The morphology and structure of graphene oxide, graphene oxide-Cu powders and Gr/Cu composites were characterized by scanning electronic microscopy, transmission electronic microscopy, X-ray diffraction and Raman spectroscopy, respectively. The effects of graphene contents,applied loads and sliding speeds on the tribological behavior of the composites were investigated. The results indicate that the coefficient of friction of the composites decreases first and then increases with increasing the graphene content. The lowest friction coefficient is achieved in 0.3 wt% Gr/Cu composite,which decreases by 65% compared to that of pure copper. The coefficient of friction of the composite does not have significant change with increasing the applied load, however, it increases with increasing the sliding speed. The tribological mechanisms of the composite under different conditions were also investigated. | Xin Gao Hongyan Yue Erjun Guo Shaolin Zhang Longhui Yao Xuanyu Lin Bao Wang Enhao Guan | 2018 | Journal of Materials Science & Technology2018，34，10： | 9 |
| 2 | Non-contact cylindrical rotating triboelectric nanogenerator for harvesting kinetic energy from hydraulics显示文摘Hydraulics provide a unique and widely existed mechanical energy source around us,such as in water or oil pipes,and sewers.Here,a non-contact cylindrical rotating triboelectric nanogenerator(TENG)was developed to harvest the mechanical energy from water flows.Operation of the TENG was based on the non-contact free-rotating between a curved Cu foil and a flexible nanostructured fluorinated ethylene propylene(FEP)polymer film.The free-standing distance between two rotating interfaces avoided abrading of electrode materials.The TENG was able to effectively convert mechanical energy of the water flow into electricity.When driven by water flow,the output voltage and current of the TENG reached 1,670 V and 13.4 uA,respectively.Without any energy storage component,the produced electricity could instantaneously power 12 white light emitting diodes(LEDs)bulbs and a digital timer.This non-contact rotating TENG would provide new opportunities for harvesting energy from many types of hydraulics as a self-sustainable power source for sensing,detection,and protection. | Nan Zhang Cheng Qin Tianxing Feng Jun Li Zhirui Yang Xiupeng Sun Erjun Liang Yanchao Mao Xudong Wang | 2020 | Nano Research2020，13，7： | 4 |
| 3 | Lysozyme inhibits postharvest physiological deterioration of cassava显示文摘After harvest,cassava(Manihot esculenta Crantz)storage roots undergo rapid postharvest physiological deterioration,producing blue-brown discoloration in the vasculature due to the production of polyphenolics(mainly quinonesand coumarins)by enzymes such as polyphenol oxidase(PPO).Here,we report the application of hen egg-white lysozyme(HEWL),a natural PPO inhibitor,in transgenic cassava to repress the symptoms of postharvest physiological deterioration.The HEWL-expressing transgenic plants had lower levels of the two main cassava coumarins tested,scopoletin and scopolin,compared with wild type.HEWL-expressing cassava also showed increased tolerance of oxidative stress.Overall,the lysozyme-PPO system proved to be functional in plants for repressing PPO-mediated commercial product browning. | Xiaoyun Wu Jia Xu Qiuxiang Ma Sulaiman Ahmed Xinlu Lu Erjun Ling Peng Zhang | 2022 | Journal of Integrative Plant Biology2022，64，3： | 1 |
| 4 | Gradual chlorination at different positions of D-π-A copolymers based on benzodithiophene and isoindigo for organic solar cells显示文摘Isoindigo(IID)has been widely used as strong acceptor unit(A)to construct narrow bandgap polymers in organic field effect transistors(OFETs)and organic solar cells(OSCs).Combing with IID,we chose benzodithiophene(BDT)as the donor unit(D)and thieno[3,2-b]thiophene(TT)as theπbridge to construct a new type of D-π-A polymer PE70.Based on PE70,we adopt the chlorination strategy to fine-tune photoelectric characteristics and film morphology,and then developed PE74 and PE75.By blending with non-fullerene acceptor(NFA)Y6,device based on PE74 with chloride substitution on the BDT unit showed increasing photovoltaic performance.In addition,further chlorine substitution on the IID(PE75)would greatly reduce the non-radiative voltage loss(ΔV3),and the distorted molecular conformation also took responsible for the excessive recombination.As results,PE74:Y6-based device achieves a power conversion efficiency(PCE)of 11.06%with open-circuit voltage(VOC)of 0.76 V,which are higher than those of PE70:Y6(PCE of 10.40%and VOC of 0.72 V)and PE75:Y6-based device(PCE of 6.24%and VOC of 0.84 V).This work demonstrates the regularity of the photovoltaic performance caused by chlorination strategy in polymer in the non-fullerene OSC devices,which provide important insights into highperformance photovoltaic materials. | Jialing Zhou Bao Zhang Yanfang Geng Qing Guo Qiang Guo Erjun Zhou | 2021 | Materials Reports(Energy)2021，1，4： | 1 |
| 5 | Textured BaTi2O5 ceramic synthesized by laser rapid solidification method and its dielectric properties显示文摘 | Junji Zhang Jumei Yu Mingju Chao Erjun Liang Mingyu Li Dechuan Li | 2012 | Journal of Materials Science2012，，3： | 1 |
| 6 | The first application of isoindigo-based polymers in non-fullerene organic solar cells显示文摘Although isoindigo(IID)-based polymers can realize high charge mobility,these materials are currently confined to fullerenebased organic solar cells(OSCs).Herein,we designed a pair of alternative D-π-A type copolymers,PE71 and PE72,to expand the application in non-fullerene OSCs,where benzo[1,2-b:4,5-b′]thiophene(BDT),thieno[3,2-b]thiophene(TT)and IID units were used as D,A andπ-bridge,respectively.The aim of optimizing the length of alkyl chains on TT bridge is to ensure polymer solubility,crystallinity as well as miscibility with acceptor molecules.We find that PE71 and PE72 exhibit similar optical and electronic properties,but PE71 with shorter hexyl chain tends to aggregate into fiber-like structure.In the end,Y6 is selected as the electron acceptor because of suitable energy levels and complementary absorption spectrum.Finally,PE71:Y6 device realizes a power conversion efficiency(PCE)of 12.03%,which is obviously higher than that of PE72:Y6 device(9.74%)and is also the highest value for IID-based photovoltaic polymers.The charge transport,molecular aggregation,film morphology and energy loss analysis were systematically investigated.The improved photovoltaic performance of PE71:Y6 mainly originates from the better interpenetrating network structure toward facilitating exciton seperation and free charge carrier transportation.Our results indicate that IID-based D-π-A polymers can also be utilized in non-fullerene OSCs and the alkyl chains on the thieno[3,2-b]thiopheneπ-bridge have a vital effect on the photovoltaic performance. | Bao Zhang Ning An Hongbo Wu Yanfang Geng Yanming Sun Zaifei Ma Weiwei Li Qiang Guo Erjun Zhou | 2020 | Science China Chemistry2020，63，9： | 1 |
| 7 | Layered growth of aligned carbon nanotube arrays by pyrolysis显示文摘 | Zhang Hongrui Liang Erjun Ding Pei | 2003 | Physica B2003，337，： | 1 |
| 8 | Research on load distribution effect of load distributed structure in the complex rotational and translational engineering 显示文摘 | Erjun Wu Zhaona Cao Fenfen Zhang | 2013 | Advanced Materials Research2013，，671674： | 1 |
| 9 | Separation of As and Bi and enrichment of As,Cu,and Zn from copper dust using an oxidation-leaching approach显示文摘Copper dust with high arsenic content is a hazardous waste that should be treated properly.Herein,the copper dust is oxidized,leached,and separated at room temperature and atmospheric pressure.To separate As and Bi,part of As(Ⅲ)in copper dust is oxidized to As(V),so that most of the As,Cu,and Zn elements enter the solution and the Bi remains in the leaching residue.Also,the influence of several factors,such as H_(2)SO_(4) dosage,H_(2)O_(2) dosage,liquid-solid ratio,leaching temperature and leaching time,on the leaching percentage of As,Bi,Cu,and Zn is systematically investigated.The optimal conditions are obtained as follows:liquid-solid ratio of 3:1,H_(2)O_(2) dosage of 10 ml/50 g(dust),H_(2)SO_(4) dosage of 4.5 ml/50 g(dust),leaching temperature of 85 C,and leaching time of 3 h.Under these conditions,the leaching percentage of As,Cu,Zn,and Bi is found to be 97.39%,96.11%,97.32%,and 2.40%,respectively.For further recovery of As from the leaching solution,the one-step recycle leaching of the leaching solution is performed to increase the concentration of As in the recycled leaching solution.The concentration of arsenic in the recycling leaching solution is found to be 79.63 g·L^(-1),which is beneficial for the study on further recovery of As_(2)O_(3). | Erjun Zhang Kanggen Zhou Wei Chen Xuekai Zhang Changhong Peng | 2021 | Chinese Journal of Chemical Engineering2021，34，5： | 1 |
| 10 | A new isotropic negative thermal expansion material of CaSnF_(6)with facile and low-cost synthesis显示文摘Double ReO_(3)-type fluorides have a great interest in the field of negative thermal expansion(NTE)and luminescent materials.However,their application is limited by the scarcity of quantity,expensive raw materials,and harsh preparation conditions.In this work we have found a new NTE material,CaSnF_(6),by applying the concept of the average atomic volume.More importantly,different from the previous solid-phase sintering and direct fluorination methods,the nano CaSnF6 has been synthesized for the first time by solvothermal method.The results of X-ray diffraction(XRD)and Raman spectroscopy show that a phase transition occurs from rhombohedral(R3)to cubic(Fm3m)structure at about 200 K,and a strong isotropic NTE(αv=−15.78×10^(−6)K^(−1))appears in the cubic phase.Lattice dynamics calculations from first-principles illustrate that the NTE is due to the transverse vibration of fluorine atoms excited by low-frequency phonons.This work not only broadens the NTE family of fluorides,but also provides a new facile and low-cost fabricati on method for the preparation of NTE fluorides. | Qilong Gao Sen Zhang Yixin Jiao Yongqiang Qiao Andrea Sanson Qiang Sun Xinwei Shi Erjun Liang Jun Chen | 2023 | Nano Research2023，16，4： | 1 |
| 11 | Enhancing the activity of FeNi bimetallic electrocatalysts on overall water splitting by Nd_(2)O_(3)-induced FeNi lattice contraction显示文摘The development of high-efficiency and cost-effective bifunctional electrocatalysts for overall water splitting remains a formidable challenge.Herein,FeNi-Nd_(2)O_(3) nanoparticles anchored on N-doped carbon nanotubes(FeNi-Nd_(2)O_(3)/NCN) are designed for highly effective overall water splitting via a facile two-step hydrothermal approach.The synthetic FeNi-Nd_(2)O_(3) hetero-trimers(Fe 2p-Ni 2p-Nd 3d orbital coupling)on NCN achieve excellent oxygen evolution reaction(OER) and hydrogen evolution reaction(HER) activities with overpotentials of 270 and 120 mV at 10 mA cm^(-2) in 1 M KOH solution.Moreover,a small voltage of 1.52 V at 10 mA cm^(-2) is achieved when FeNi-Nd_(2)O_(3)/NCN is assessed as bifunctional catalyst for overall water splitting,which is superior to the typically integrated Pt/C and RuO_(2) counterparts(1.54 V at 10 mA cm^(-2)).The related characterizations including X-ray absorption fine structure(XAFS)spectroscopy show that the remarkably improved activity is originated from Nd_(2)O_(3)-induced FeNi bimetallic lattice contraction.Furthermore,density functional theory(DFT) calculations indicate that the lattice contraction reduces binding energies of intermediates by downshifting the position of FeNi bimetallic d-band center relative to the Fermi level to optimize catalytic performance.Therefore,the Nd_(2)O_(3)-induced FeNi bimetallic lattice contraction may provide a new perspective for designing and synthesizing innovative catalytic systems. | Jiajia Li Yunong Qin Tianyu Tan Qiancheng Zhu Bo Ouyang Erjun Kan Wenming Zhang | 2023 | Journal of Energy Chemistry2023，，12： | 0 |
| 12 | Nitrogen doped porous carbon-based bifunctional oxygen electrocatalyst with controllable phosphorus content for zinc-air battery显示文摘The controllable construction of non-noble metal based bifunctional catalysts with high activities towards oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is of great significance,but remains a challenge.Herein,we reported an effective method to synthesize cobalt-nitrogen doped mesoporous carbon-based bifunctional oxygen electrocatalyst with controllable phosphorus content(Co-N-P_(X)-MC,X=0.5,1.0,1.5,2.0).The mesoporous carbon substrate endowed the asprepared samples with more exposed active surface(236.50 m^(2)·g^(−1))and the most appropriate doping ratio of phosphorus had been investigated to be 1.5(Co-N-P1.5-MC).For ORR,Co-N-P1.5-MC exhibited excellent catalytic activity with more positive onset potential(1.01 V)and half-wave potential(0.84 V)than the other samples.For OER,Co-N-P1.5-MC also showed a low overpotential of 415 mV.Combining experimental results and density-functional theory(DFT)calculations,the outstanding bifunctional catalytic performance of Co-N-P1.5-MC was due to the synergistic cooperation between the P and N dopants,which could reduce the reaction barriers and was favorable for ORR and OER.Moreover,the Zn-air battery using Co-N-P1.5-MC as the cathode showed remarkable battery performance with high stability(could operate stably for over 160 h at 10 mA·cm^(−2))and maximum power density(119 mW·cm^(−2)),demonstrating its potential for practical applications.This work could provide significant enlightenment towards the design and construction of bifunctional oxygen electrocatalyst for next-generation electrochemical devices. | Shichang Cai Zihan Meng Gaojie Li Yu An Yapeng Cheng Erjun Kan Bo Ouyang Haining Zhang Haolin Tang | 2023 | Nano Research2023，16，4： | 0 |
| 13 | Side chain engineering of quinoxaline-based small molecular nonfullerene acceptors for high-performance poly(3-hexylthiophene)-based organic solar cells显示文摘Poly(3-hexylthiophene)(P3HT)is one of the most used semiconducting polymers for organic photovoltaics because it has potential for commercialization due to its easy synthesis and stability.Although the rapid development of the small molecular non-fullerene acceptors(NFAs)have largely improved the power conversion efficiency(PCE)of organic solar cells(OSCs)based on other complicated p-type polymers,the PCE of P3HT-based OSCs is still low.In addition,the design principle and structure-properties correlation for the NFAs matching well with P3HTare still unclear and need to be investigated in depth.Here we designed a series of NFAs comprised of acceptor(A)and donor(D)units with an A2-A1-D-A1-A2 configuration.These NFAs are abbreviated as Qx3,Qx3 b and Qx3c,where indaceno[1,2-b:5,6-b′]dithiophene(IDT),quinoxaline(Qx)and 2-(1,1-dicyanomethylene)rhodanine serve as the middle D,bridged A1 and the end group A2,respectively.By subtracting the phenyl side groups appended on both IDT and Qx skeletons,the absorption spectra,energy levels and crystallinity could be regularly modulated.When paired with P3 HT,three NFAs show totally different photovoltaic performance with PCEs of 3.37%(Qx3),6.37%(Qx3b)and 0.03%(Qx3 c),respectively.From Qx3 to Qx3b,the removing of phenyl side chain in the middle IDT unit results in the increase of crystallinity and electron mobility.However,after subtracting all the grafted phenyl side groups on both IDT and Qx units,the final molecule Qx3 c exhibits the lowest PCE of only 0.03%,which is mainly attributed to the serious phase-separation of the blend film.These results demonstrate that optimizing the substituted position of phenyl side groups for A2-A1-D-A1-A2 type NFAs is vital to regulate the optoelectronic property of molecule and morphological property of active layer for high performance P3HT-based OSCs. | Bo Xiao Qianqian Zhang Gongqiang Li Mengzhen Du Yanfang Geng Xiangnan Sun Ailing Tang Yingliang Liu Qiang Guo Erjun Zhou | 2020 | Science China Chemistry2020，63，2： | 0 |
| 14 | Tuning the optoelectronic properties of vinylene linked perylenediimide dimer by ring annulation at the inside or outside bay positions for fullerene-free organic solar cells显示文摘Among various perylenediimide(PDI)-based small molecular non-fullerene acceptors(NFAs),PDI dimer can effectively avoid the excessive aggregation of single PDI and improve the photovoltaic performance.However,the twist of perylene core in PDI dimer will destroy the effective conjugation.Thus,ring annulation of PDI dimer is a feasible method to balance the film quality and electron transport,but the systematic study has attracted few attentions.Herein,we choose a simple vinylene linked PDI dimer,V-PDI2,and then conduct further studies on the structure-property-performance relationship of four kinds of derived fused-PDI dimers,namely V-TDI2,V-FDI2,V-PDIS2 and V-PDISe2 respectively.The former two are incorporated thianaphthene and benzofuran at the inside bay positions,and the latter two are fused thiophene and selenophene at the outside bay positions,respectively.Theoretical calculations reveal the inside-and outside-fused structures largely affect the skeleton configuration,the former two tend to be planar structure and the latter two maintain the distorted backbone.The photovoltaic characterizations show that the inside-fused PDI dimers offer high open circuit voltage(VOC),while the outside-fused PDI dimers afford large short-circuit current density(JSC).This variation tendency results from the reasonably tunable energy levels,light absorption,molecular crystallinity and film morphology.As a result,PBDB-T:V-PDISe2 device exhibits the highest power conversion efficiency(PCE)of 6.51%,and PBDB-T:VFDI2 device realizes the highest VOC of 1.00 V.This contribution indicates that annulation of PDI dimers in outside or inside bay regions is a feasible method to modulate the properties of PDI-based non-fullerene acceptors. | Jing Yang Fan Chen Peiqing Cong Hongjun Xiao Yanfang Geng Zhihui Liao Lie Chen Bao Zhang Erjun Zhou | 2020 | Journal of Energy Chemistry2020，29，1： | 0 |
| 15 | Effects of BTA2 as the third component on the charge carrier generation and recombination behavior of PTB7:PC71BM photovoltaic system显示文摘Effects of a benzotriazole(BTA)-based small molecule,BTA2,as the third component on the charge carrier generation and recombination behavior of poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]](PTB7):[6,6]-phenyl-C71-butyric acid methyl ester(PC71BM)organic solar cells(OSCs)were investigated by optical simulation of a transfer matrix model(TMM),photo-induced charge extraction by linearly increasing voltage(photo-CELIV)technique,atomic force microscope(AFM),and the Onsager–Braun model analysis.BTA2 is an A_(2)-A_(1)-D-A_(1)-A_(2)-type non-fullerene small molecule with thiazolidine-2,4-dione,BTA,and indacenodithiophene as the terminal acceptor(A_(2)),bridge acceptor(A_(1)),and central donor(D),respectively.The short-circuit current density of the OSCs with BTA2 can be enhanced significantly owing to a complementary absorption spectrum.The optical simulation of TMM shows that the ternary OSCs exhibit higher internal absorption than the traditional binary OSCs without BTA2,resulting in more photogenerated excitons in the ternary OSCs.The photo-CELIV investigation indicates that the ternary OSCs suffer higher charge trap-limited bimolecular recombination than the binary OSCs.AFM images show that BTA2 aggravates the phase separation between the donor and the acceptor,which is disadvantageous to charge carrier transport.The Onsager-Braun model analysis confirms that despite the charge collection efficiency of the ternary OSCs being lower than that of the binary OSCs,the optimized photon absorption and exciton generation processes of the ternary OSCs achieve an increase in photogenerated current and thus improve power conversion efficiency. | Leijing Liu Hao Zhang Bo Xiao Yang Liu Bin Xu Chen Wang Shanpeng Wen Erjun Zhou Gang Chen Chan Im Wenjing Tian | 2021 | Frontiers of Chemical Science and Engineering2021，15，1： | 0 |
| 16 | Preparation and Properties of Silver Colloids Produced by Laser-Induced Reduction of Silver Nitrate显示文摘Silver colloids have been prapared by laser-induced reduction of silver nitrate.The.properties of the colloids were studied with transmission electron microscopy,visible-ultraviolet absorption and Raman spectroscopy.We Rnd that the growth of the silver grains is dependent on the laser illumination time.Two characteristic absorption bands of the colloids are located near 390 and 560nm,respectively.Not only are the silver colloids much cleaner than those prepared by chemical reduction methods,but also surface enhanced Raman scattering active.The method may be of interests for ultrafine particle studies as well. | LIANG Erjun WANG Yuntao WANG Yujin HAO Qingxiu ZHANG Pengxiang | 1992 | Chinese Physics Letters1992，9，2： | 0 |
| 17 | Engineering Vacancy-Atom Ensembles to Boost Catalytic Activity toward Hydrogen Evolution显示文摘The dissociation of water is the rate-determining step of several energy-relating reactions due to high energy barrier in homolysis of H-O bond.Herein,engineering vacancy-atom ensembles via injecting oxygen vacancy(V O)into single facet-exposed TiO_(2)-Pd catalyst to form V_(O)-Pd ensemble is proposed and implemented.The outstanding activity of as-prepared catalyst,1.5-PdTV_(O),toward water dissociation is established with a turnover frequency of 240 min^(−1) in ammonia borane hydrolysis at 298 K.Density functional theory simulation suggests that the V_(O)-Pd ensemble is responsible for the high intrinsic catalytic activity.Water molecules tend to be dissociated on V_(O) sites and ammonia borane molecules on Pd atoms.Those H atoms from water dissociation on V_(O) combine with H atoms from ammonia borane on Pd atoms to generate H_(2).This insights into engineering vacancy-atom ensembles catalysis provide a new avenue to design catalytic materials for important energy chemical reactions. | Ruofan Shen Yanyan Liu Hao Wen Xianli Wu Zhikun Peng Sehrish Mehdi Tao Liu Huanhuan Zhang Shuyan Guan Erjun Liang Baojun Li | 2023 | Energy & Environmental Materials2023，6，1： | 0 |
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