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| 1 | Ultrathin Ti_(3)C_(2)T_(x)(MXene) Nanosheet-Wrapped NiSe_(2) Octahedral Crystal for Enhanced Supercapacitor Performance and Synergetic Electrocatalytic Water Splitting显示文摘Metal selenides,such as NiSe2,have exhibited great potentials as multifunctional materials for energy storage and conversation.However,the utilization of pure NiSe2 as electrode materials is limited by its poor cycling stability,low electrical conductivity,and insufficient electrochemically active sites.To remedy these defects,herein,a novel NiSe2/Ti3C2Tx hybrid with strong interfacial interaction and electrical properties is fabricated,by wrapping NiSe2 octahedral crystal with ultrathin Ti3C2Tx MXene nanosheet.The NiSe2/Ti3C2Tx hybrid exhibits excellent electrochemical performance,with a high specific capacitance of 531.2 Fg-1 at1 A g-1 for supercapacitor,low overpotential of 200 mV at 10 mA g-1,and small Tafel slope of 37.7 mV dec-1 for hydrogen evolution reaction(HER).Furthermore,greater cycling stabilities for NiSe2/Ti3C2Tx hybrid in both supercapacitor and HER have also been achieved.These significant improvements compared with unmodified NiSe2 should be owing to thestrong interfacial interaction between NiSe2 octahedral crystal and Ti3C2Tx MXene,which provides enhanced conductivity,fast charge transfer as well as abundant active sites,and highlight the promising potentials in combinations of MXene with metal selenides for multifunctional applications such as energy storage and conversion. | Hanmei Jiang Zegao Wang Qian Yang Luxi Tan Lichun Dong Mingdong Dong | 2019 | Nano-Micro Letters2019，11，2： | 4 |
| 2 | Nitrogen Flow Analysis in Huizhou, South China显示文摘 | Xiaobo Ma Zhaoyin Wang Zegao Yin Albert Koenig | 2008 | Environmental Management2008，，3： | 1 |
| 3 | Recent Progress in Emerging Two‑Dimensional Transition Metal Carbides显示文摘As a new member in two-dimensional materials family,transition metal carbides(TMCs)have many excellent properties,such as chemical stability,in-plane anisotropy,high conductivity and flexibility,and remarkable energy conversation efficiency,which predispose them for promising applications as transparent electrode,flexible electronics,broadband photodetectors and battery electrodes.However,up to now,their device applications are in the early stage,especially because their controllable synthesis is still a great challenge.This review systematically summarized the state-of-the-art research in this rapidly developing field with particular focus on structure,property,synthesis and applicability of TMCs.Finally,the current challenges and future perspectives are outlined for the application of 2D TMCs. | Tianchen Qin Zegao Wang Yuqing Wang Flemming Besenbacher Michal Otyepka Mingdong Dong | 2021 | Nano-Micro Letters2021，13，11： | 1 |
| 4 | Tune the electronic structure of MoS_(2)homojunction for broadband photodetection显示文摘Due to the weak absorption and low light-matter interaction of MoS_(2),intrinsic MoS_(2)photodetector usually has low photoresponse,thus limiting its real application.Herein,MoS_(2)homojunction was constructed by using the chemical vapor deposition grown intrinsic MoS_(2)films and the Nb-doped MoS_(2)films.The results show that the Nb doping will induce p-type doping in MoS_(2),where the electron concentration will decrease by 2.08×10^(12)cm^(–2)after Nb doping.By investigating the photoelectric effect of MoS_(2)/Nb-doped MoS_(2)homojunction-based phototransistor,the tunability of the photoresponse,detectivity as the function of the external field,wavelength,and power of light have been studied in detail.The results show that the photoresponse and detectivity are strongly dependent on the gate voltage due to the external field tuned interlayer photoexcitation attributing to the band bending.The maximum of photoresponse can reach 51.4 A/W,the detectivity can reach 3.0×10^(12)Jones,which is two orders higher than that of intrinsic MoS_(2).Furthermore,by correlating the photoresponse and detectivity with the external field,it is found that the photodetection of MoS_(2)homojunction can be significantly tuned and exhibit well photodetection in infrared.This comprehensive work not only sheds light on the tunable photoexcitation mechanism but also offers a strategy to achieve a high-performance photodetector. | Rui Tao Xianlin Qu Zegao Wang Fang Li Lei Yang Jiheng Li Dan Wang Kun Zheng Mingdong Dong | 2022 | Journal of Materials Science & Technology2022，，24： | 1 |
| 5 | Experimental Wave Attenuation Study over Flexible Plants on a Submerged Slope显示文摘Using plants is a kind of environmentally-friendly coastal protection to attenuate wave energy. In this paper, a set of experiments were conducted to investigate the wave attenuation performance using flexible grasses on a submerged slope, and the wave attenuation coefficient for these experiments was calculated for different still water depths, slope and grass configurations. It was found that the slope plays a significant role in wave attenuation. The wave attenuation coefficient increases with increasing relative row number and relative density. For a small relative row number, the two configurations from the slope top to its toe and from the slope toe to its top performed equally to a large extent. For a medium relative row number, the configuration from the slope toe to its top performed more poorly than that from the slope top to its toe; however, it performed better than that from the slope top to its toe for a high relative row number. With a single row of grasses close to the slope top from the slope toe, the wave attenuation coefficient shows double peaks. With increasing grass rows or still water depth, the grass location corresponding to the maximum wave attenuation coefficient is close to the slope top. The dimensional analysis and the least square method were used to derive an empirical equation of the wave attenuation coefficient considering the effect of relative density, the slope, the relative row number and the relative location of the middle row, and the equation was validated to experimental data. | YIN Zegao YANG Xiaoyu XU Yuanzhao DING Meiling LU Haixiang | 2017 | Journal of Ocean University of China2017，16，6： | 1 |
| 6 | Emerging MoS_(2)Wafer-Scale Technique for Integrated Circuits显示文摘As an outstanding representative of layered materials,molybdenum disulfide(MoS_(2))has excellent physical properties,such as high carrier mobility,stability,and abundance on earth.Moreover,its reasonable band gap and microelectronic compatible fabrication characteristics makes it the most promising candidate in future advanced integrated circuits such as logical electronics,flexible electronics,and focal-plane photodetector.However,to realize the all-aspects application of MoS_(2),the research on obtaining high-quality and large-area films need to be continuously explored to promote its industrialization.Although the MoS_(2)grain size has already improved from several micrometers to sub-millimeters,the high-quality growth of wafer-scale MoS_(2)is still of great challenge.Herein,this review mainly focuses on the evolution of MoS_(2)by including chemical vapor deposition,metal–organic chemical vapor deposition,physical vapor deposition,and thermal conversion technology methods.The state-of-the-art research on the growth and optimization mechanism,including nucleation,orientation,grain,and defect engineering,is systematically summarized.Then,this review summarizes the wafer-scale application of MoS_(2)in a transistor,inverter,electronics,and photodetectors.Finally,the current challenges and future perspectives are outlined for the wafer-scale growth and application of MoS_(2). | Zimeng Ye Chao Tan Xiaolei Huang Yi Ouyang Lei Yang Zegao Wang Mingdong Dong | 2023 | Nano-Micro Letters2023，15，3： | 1 |
| 7 | MoP QDs@graphene as highly efficient electrocatalyst for polysulfide conversion in Li-S batteries显示文摘The shuttle effect of lithium polysulfides(LiPSs)and sluggish redox conversion significantly hinder practical implementation of lithium-sulfur batteries(LSBs).To overcome these issues,herein,we present MoP quantum dots anchored N,P-doped graphene(MPQ@G)as a multifunctional LSB cathode.The N,P-doped graphene layers serve as a conductive skeleton to support the MoP QDs which can accelerate the electron transfer,physically hinder the polysulfide migration and thus enhance the electrochemical performance.More importantly,as a polar and conductive catalyst,MoP QDs provide catalytically active sites for the conversion of LiPSs.As a result,the LSBs with MPQ@G/S cathodes deliver an elevated initial capacity of 1220.2 mAh g~(-1)at 0.2 C and remain 98.9%after rate cycles,signifying its exceptional cycling stability.Moreover,it displays a large capacity of 681.2 mAh g~(-1)even at a high rate of 1 C.The Li-S pouch cell also presents high specific capacities and preeminent cycling stabilities,confirming its great potential for high-rate applications.Density functional theory calculations demonstrate the improved absorptivity and redox conversion reversibility of LiPSs.This work provides an efficient strategy to improve composite with highly adsorptive and catalytic properties for high-performance Li-S batteries. | Bo Yu Fei Ma Dongjiang Chen Katam Srinivas Xiaojuan Zhang Xinqiang Wang Bin Wang Wanli Zhang Zegao Wang Weidong He Yuanfu Chen | 2021 | Journal of Materials Science & Technology2021，，31： | 1 |
| 8 | Reversible conductivity recovery of highly sensitive flexible devices by water vapor显示文摘With decreasing size of integrated circuits in wearable electronic devices,the circuit is more susceptible to aging or fracture problem,subsequently decreasing the transmission efficiency of electricity.Micro-healing represents a good approach to solve this problem.Herein,we report a water vapor method to repair microfiber-based electrodes by precise positioning and rapid healing at their original fracture sites.To realize this micro-level conducting healing,we utilize a bimaterial composed of polymeric microfibers as healing agents and electrically conductive species on its surface.This composite electrode shows a high-performance conductivity,great transparency,and ultra-flexibility.The transmittance of our electrode could reach up to 88 and 90%with a sheet resistance of 1 and 2.8Ωsq^(−1),respectively,which might be the best performance among Au-based materials as we know.Moreover,after tensile failure,water vapor is introduced to mediate heat transfer for the healing process,and within seconds the network electrode could be healed along with recovering of its resistance.The recovering process could be attributed to the combination of adhesion force and capillary force at this bimaterial interface.Finally,this functional network is fabricated as a wearable pressure/strain sensing device.It shows excellent stretchability and mechanical durability upon 1000 cycles. | Yuting Wang Yingchun Su Zegao Wang Zhongyang Zhang Xiaojun Han Mingdong Dong Lifeng Cui Menglin Chen | 2018 | npj Flexible Electronics2018，2，1： | 0 |
| 9 | Tune the photoresponse of monolayer MoS_(2) by decorating CsPbBr_(3) perovskite nanoparticles显示文摘Tuning the photoresponse of monolayer MoS_(2) could extend its potential application in many fields,however,it is still a challenge.In this study,CsPbBr_(3) nanoparticles were prepared and spin-coated on the surface of monolayer MoS_(2) to fabricate hybrid CsPbBr_(3)/MoS_(2) photodetectors.By combing the photoelectrical property of the CsPbBr_(3),the synergistic effect has been systematically studied from its carrier mobility,photoresponse and detectivity.It was found that nanofilm-coating of CsPbBr_(3)would impede the photoelectric performance due to the electron-hole recombination facilitated by the defects at the interface of C PbBr_(3) and MoS_(2) films.While the nanoparticles decorating was observed to significantly improve the conductivity of the monolayer Mo S_(2),which also increased the on/off ratio of the MoS_(2) transistor from 8.2×10~3 to 4.4×10^(4),and enhanced the carrier mobility from 0.090 cm^(2)V^(-1)s^(-1)to 0.202 cm^(2)V^(-1)s^(-1),ascribing to a mixed electron recombination-injection process.Furthermore,the CsPbBr_(3) nanofilm would decrease the responsivity to 136 and 178 A/W under the light wavelength of 400 and 500 nm,respectively,while decorating CsPbBr_(3) nanoparticles improve the photoresponse to 948 and 883 A/W with the detectivity at the level of 10^(11)Jones.This work may provide an easy and cost-efficient way to tune the photoresponse of MoS_(2) photodetectors. | Chao Tan Rui Tao Zhihao Yang Lei Yang Xiaolei Huang Yong Yang Fei Qi Zegao Wang | 2023 | Chinese Chemical Letters2023，34，7： | 0 |
| 10 | Hydrodynamic Coefficient Investigation on a Partial Permeable Stepped Breakwater Under Regular Waves显示文摘Traditional breakwater takes the advantage of high protection performance and has been widely used.However,it contributes to high wave reflection in the seaside direction and poor water exchange capacity between open seawater and an inside harbor.Consequently,a partially permeable stepped breakwater(PPSB)is proposed to ensure safety and good water exchange capacity for an inside harbor,and a 3-D computational fluid dynamics(CFD)mathematical model was used to investigate the hydrodynamic coefficients using Reynolds-Averaged Navier-Stokes equations,Re-Normalization Group(RNG)k-εequations,and the VOF technique.A series of experiments are conducted to measure the wave heights for validating the mathematical model,and a series of dimensionless parameters considering wave and PPSB effects were presented to assess their relationships with hydrodynamic coefficients,respectively.With the increase in the reciprocal value of PPSB slope,incident wave steepness and permeable ratio below still water level(SWL),the wave reflection coefficient decreases.The wave transmission coefficient decreases with an increase in the reciprocal value of the PPSB slope and incident wave steepness;however,it increases with the increase in the permeable ratio below SWL.With increases in the reciprocal value of the PPSB slope,permeable ratio below SWL and incident wave steepness for relatively high wave period scenarios,the wave energy dissipation coefficient increases;however,it decreases slightly with increases in the incident wave steepness for the smallest wave period scenarios.Furthermore,simple prediction formulas are conducted for predicting the hydrodynamic coefficients and they are well validated with the related data. | YIN Zegao ZHENG Zihan YU Ning WANG Haojian | 2021 | Journal of Ocean University of China2021，20，6： | 0 |
| 11 | Defect repairing in two-dimensional transition metal dichalcogenides显示文摘Atomically thin two-dimensional(2D)transition metal dichalcogenides(TMDCs)have stimulated enormous research interest due to rich phase structure,high theoretical carrier mobility and layer-dependent bandgap.In view of the close correlation between defects and properties in 2D TMDCs,more attentions have been paid on the defect engineering in recent years,however the mechanism is still unclear.Herein,we review the critical progress of defect engineering and provide an extensive way to modulate the properties depressed by defects.To insight into the defect engineering,we firstly introduce two common kinds of defects during the growth progress of TMDCs and the possible distribution of energy levels those defects could induce.Then,various methods to improve point defects and grain boundaries during the period of growth are discussed intensively,with the assistance of which more large-area TMDCs films can be obtained.Considering the defects in TMDCs are inevitable regardless of concentration,we also highlight strategies to heal the defects after growth.Through dry methods or wet methods,the chalcogen vacancies can be repaired and thus,the performance of electronic device would be significantly enhanced.Finally,we propose the challenges and prospective for defect engineering in 2D TMDCs materials to support the optimization of device and lead them to wide applied fields. | Shiyan Zeng Fang Li Chao Tan Lei Yang Zegao Wang | 2023 | Frontiers of physics2023，18，5： | 0 |
| 12 | Experimental Study of Dissolved Oxygen Transport by Regular Waves Through a Perforated Breakwater显示文摘The perforated breakwater is an environmentally friendly coastal structure,and dissolved oxygen concentration levels are an important index to denote water quality.In this paper,oxygen transport experiments with regular waves through a vertical perforated breakwater were conducted.The oxygen scavenger method was used to reduce the dissolved oxygen concentration of inner water body with the chemicals Na_2SO_3 and Co Cl_2.The dissolved oxygen concentration and wave parameters of 36 experimental scenarios were measured with different perforated arrangements and wave conditions.It was found that the oxygen transfer coefficient through wave surface,K_1a_1,is much lower than the oxygen transport coefficient through the perforated breakwater,K_2a_2.If the effect of K_1a_1 is not considered,the dissolved oxygen concentration computation for inner water body will not be greatly affected.Considering the effect of a permeable area ratio α,relative location parameter of perforations δ and wave period T,the aforementioned data of 30 experimental scenarios,the dimensional analysis and the least squares method were used to derive an equation of K_2a_2(K_2a_2=0.0042α^(0.5)δ^(0.2)T^(-1)).It was validated with 6 other experimental scenarios data,which indicates an approximate agreement.Therefore,this equation can be used to compute the DO concentration caused by the water transport through perforated breakwater. | YIN Zegao YU Ning LIANG Bingchen ZENG Jixiong XIE Shaohua | 2016 | Journal of Ocean University of China2016，15，1： | 0 |
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