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| 1 | Predicting Cadmium Safety Thresholds in Soils Based on Cadmium Uptake by Chinese Cabbage显示文摘Cadmium(Cd), a common toxic heavy metal in soil, has relatively high bioavailability, which seriously threatens agricultural products. In this study, 8 different soils with contrasting soil properties were collected from different regions in China to investigate the Cd transfer coefficient from soil to Chinese cabbage(Brassica chinensis L.) and the threshold levels of Cd in soils for production of Chinese cabbage according to the food safety standard for Cd. Exogenous Cd(0–4 mg kg^(-1)) was added to the soils and equilibrated for 2 weeks before Chinese cabbage was grown under greenhouse conditions. The influence of soil properties on the relationship between soil and cabbage Cd concentrations was investigated. The results showed that Cd concentration in the edible part of Chinese cabbage increased linearly with soil Cd concentration in 5 soils, but showed a curvilinear pattern with a plateau at the highest dose of exogenous Cd in the other 3 soils. The Cd transfer coefficient from soil to plant varied significantly among the different soils and decreased with increasing soil p H from 4.7 to 7.5. However, further increase in soil pH to > 8.0 resulted in a significant decrease in the Cd transfer coefficient. According to the measured Cd transfer coefficient and by reference to the National Food Safety Standards of China, the safety threshold of Cd concentration in soil was predicted to be between 0.12 and 1.7 mg kg^(-1) for the tested soils. The predicted threshold values were higher than the current soil quality standard for Cd in 5 soils, but lower than the standard in the other 3 soils. Regression analysis showed a significant positive relationship between the predicted soil Cd safety threshold value and soil p H in combination with soil organic matter or clay content. | LU Junhe YANG Xinping MENG Xuchao WANG Guoqing LIN Yusuo WANG Yujun ZHAO Fangjie | 2017 | Pedosphere2017，27，3： | 13 |
| 2 | Preparation and CO2 adsorption properties of porous carbon by hydrothermal carbonization of tree leaves显示文摘Porous carbon materials were prepared by hydrothermal carbonization(HTC) and KOH activation of camphor leaves and camellia leaves. The morphology, pore structure, chemical properties and CO2 capture ability of the porous carbon prepared from the two leaves were compared. The effect of HTC temperature on the structure and CO2 adsorption properties was especially investigated. It was found that HTC temperature had a major effect on the structure of the product and the ability to capture CO2. The porous carbon materials prepared from camellia leaves at the HTC temperature of 240℃ had the highest proportion of microporous structure, the largest specific surface area(up to 1823.77m^2/g) and the maximum CO2 adsorption capacity of 8.30mmol/g at 25℃ under 0.4 MPa. For all prepared porous carbons, simulation results of isothermal adsorption model showed that Langmuir isotherm model described the adsorption equilibrium data better than Freundlich isotherm model. For porous carbons prepared from camphor leaves, pseudo-first order kinetic model was well fitted with the experimental data. However,for porous carbons prepared from camellia leaves, both pseudo-first and pseudo-second order kinetics model adsorption behaviors were present. The porous carbon materials prepared from tree leaves provided a feasible option for CO2 capture with low cost, environmental friendship and high capture capability. | Guangzhi Yang Shen Song Jing Li Zhihong Tang Jinyu Ye Junhe Yang | 2019 | Journal of Materials Science & Technology2019，35，5： | 8 |
| 3 | “All‐In‐One” integrated ultrathin SnS2@3D multichannel carbon matrix power high‐areal–capacity lithium battery anode显示文摘Construction of a thickness‐independent electrode with high active material mass loading is crucial for the development of high energy rechargeable lithium battery.Herein,we fabricate an all‐in‐one integrated SnS2@3D multichannel carbon matrix(SnS2@3DMCM)electrode with in‐situ growth of ultrathin SnS2 nanosheets inside the inner walls of three dimensional(3D)multichannels.The interconnected conductive carbon matrix derived from natural wood acts as an integrated porous current collector to avail the electrons transport and accommodate massive SnS2 nanosheets,while plenty of 3D aligned multichannels facilitate fast ions transport with electrode thickness‐independent even under high mass loading.As expected,the integrated SnS2@3DMCM electrode exhibits remarkable electrochemical lithium storage performance,such as exceptional high‐areal‐capacity of 6.4 mAh cm−2,high rate capability of 3 mAh cm−2 under current of 6.8 mAcm−2(10 C),and stable cycling performance of 6.8 mAcm−2 with a high mass loading of 7mg cm−2.The 3D integrated porous electrode constructing conveniently with the natural source paves new avenues towards future high‐performance lithium batteries. | Hongyi Xu Chengxin Peng Yuhua Yan Fei Dong Hao Sun Junhe Yang Shiyou Zheng | 2019 | Carbon Energy2019，1，2： | 4 |
| 4 | Homologous Strategy to Construct High‑Performance Coupling Electrodes for Advanced Potassium‑Ion Hybrid Capacitors显示文摘Potassium-ion hybrid capacitors(PIHCs)have been considered as promising potentials in mid-to large-scale storage system applications owing to their high energy and power density.However,the process involving the intercalation of K+into the carbonaceous anode is a sluggish reaction,while the adsorption of anions onto the cathode surface is relatively faster,resulting in an inability to exploit the advantage of high energy.To achieve a high-performance PIHC,it is critical to promote the K^+insertion/desertion in anodic materials and design suitable cathodic materials matching the anodes.In this study,we propose a facile“homologous strategy”to construct suitable anode and cathode for high-performance PIHCs,that is,unique multichannel carbon fiber(MCCF)-based anode and cathode materials are firstly prepared by electrospinning,and then followed by sulfur doping and KOH activation treatment,respectively.Owing to a multichannel structure with a large interlayer spacing for introducing S in the sulfur-doped multichannel carbon fiber(S-MCCF)composite,it presents high capacity,super rate capability,and long cycle stability as an anode in potassium-ion cells.The cathode composite of activated multichannel carbon fiber(aMCCF)has a considerably high specific surface area of 1445 m^2 g^−1 and exhibits outstanding capacitive performance.In particular,benefiting from advantages of the fabricated S-MCCF anode and aMCCF cathode by homologous strategy,PIHCs assembled with the unique MCCF-based anode and cathode show outstanding electrochemical performance,which can deliver high energy and power densities(100 Wh kg^−1 at 200 W kg^−1,and 58.3 Wh kg^−1 at 10,000 W kg^−1)and simultaneously exhibit superior cycling stability(90%capacity retention over 7000 cycles at 1.0 A g^−1).The excellent electrochemical performance of the MCCF-based composites for PIHC electrodes combined with their simple construction renders such materials attractive for further in-depth investigations of alkali-ion battery and capacitor applications. | Ying Xu Jiafeng Ruan Yuepeng Pang Hao Sun Chu Liang Haiwen Li Junhe Yang Shiyou Zheng | 2021 | Nano-Micro Letters2021，13，1： | 3 |
| 5 | Electrolyte/Electrode Interfaces in All‑Solid‑State Lithium Batteries:A Review显示文摘All-solid-state lithium batteries are promising next-generation energy storage devices that have gained increasing attention in the past decades due to their huge potential towards higher energy density and safety.As a key component,solid electrolytes have also attracted significant attention and have experienced major breakthroughs,especially in terms of Li-ion conductivity.However,the poor electrode compatibility of solid electrolytes can lead to the degradation of electrolyte/electrode interfaces,which is the major cause for failure in all-solid-state lithium batteries.To address this,this review will summarize the indepth understanding of physical and chemical interactions between electrolytes and electrodes with a focus on the contact,charge transfer and Li dendrite formation occurring at electrolyte/electrode interfaces.Based on mechanistic analyses,this review will also briefly present corresponding strategies to enhance electrolyte/electrode interfaces through compositional modifications and structural designs.Overall,the comprehensive insights into electrolyte/electrode interfaces provided by this review can guide the future investigation of all-solid-state lithium batteries. | Yuepeng Pang Jinyu Pan Junhe Yang Shiyou Zheng Chunsheng Wang | 2021 | Electrochemical Energy Reviews2021，4，2： | 3 |
| 6 | Chemical state of nitrogen in carbon aerogels issued from phenol - melamine - formaldehyde gels 显示文摘 | Long Donghui Zhang Jie Yang Junhe | 2008 | Carbon2008，46，： | 1 |
| 7 | Engineering CoMoO_(4) in reduced graphene oxide as superior cathode hosts for advanced room-temperature sodium-sulfur batteries显示文摘Promising room-temperature sodium-sulfur(RT Na-S)battery systems rely on purposely designed highperforming and low-cost electrode materials.Nevertheless,there are the challenges of irreversible dissolution and slow redox kinetics of NaPSs in the complete discharge of sulfur capacity.Herein,engineered CoMoO_(4)in reduced graphene oxide(CoMoO_(4)@rGO)is reported as a class of superior cathode hosts for RT Na-S batteries.The CoMoO_(4)@rGO matrix is designed to facilitate the reversible sodiation and desodiation of sulfur,considering the strong chemisorption between sulfur(and short-chain sodium sulfides)and CoMoO_(4),which alleviates the shuttle effect of sodium sulfides and accelerates the electrochemical reaction rate at RT.The obtained S/CoMoO_(4)@rGO cathode with~52%S loading exhibits a high capacity of520.1 mA h g^(-1)after 100 cycles at 0.1 A g^(-1).Moreover,an enhanced long-term performance at high current densities(212.2 mA h g^(-1)at 4 A g^(-1)over 1000 cycles)with high Coulombic efficiency(~100%)is also achieved.This work demonstrates a novel multifunctional additive for RT Na-S battery cathodes,which is expected to promote the long-waited development towards practical applications of RT Na-S batteries. | Xin Ye Sainan Luo Zhiqi Li Jiafeng Ruan Yuepeng Pang Junhe Yang John Wang Shiyou Zheng | 2023 | Journal of Energy Chemistry2023，，11： | 1 |
| 8 | Graphene oxide- based transparent conductive films显示文摘 | Zheng Qingbin Li Zhigang Yang Junhe | 2014 | Progress in Materials Science2014，64，7： | 1 |
| 9 | Preparation of highly conductive CNTs/polyaniline composites through plasma pretreating and in-situ polymerization 显示文摘 | Junhe Yang Xia Wang Xianying Wang | 2010 | Journal of Physics and Chemical of Solids2010，71，： | 1 |
| 10 | Anti-corrosion and electrically conductive inorganic conversion coatings based on aligned graphene derivatives by electrodeposition显示文摘Ultrathin conversion coatings, made from aligned graphene derivatives and ammonium zirconium carbonate(AZC), were fabricated on stainless steel by electrodeposition. Sulfonated graphene oxide (SGO) provided electronpathways and physical barriers to corrosive molecules. Electrodeposition ensured the alignment of SGO and thefacile fabrication of the coatings. AZC is an environmental-friendly crosslinking agent, water-repellent andcorrosion inhibitor. Upon dehydration reactions, AZC improved the cohesion between SGO layers and anchoredthe conversion coatings on metal substrates. When the mass ratio of SGO to AZC was 2:1, the corrosion currentdensity of the composite coatings reached 0.098 μA cm^(-2), while that of the bared stainless steel was1.04 μA cm ^(-2), given a coating thickness of only 500 nm. The electrical conductivity of SGO/AZC compositecoatings can be tailored from 3.84 × 10^(-5) to 2.28×10^(-3)S‧cm^(-1) by heat treatment and HI reduction, whichsatisfied the electrical conductivity requirement of wide applications in electronic industry, office appliances andpetroleum storage. | Wenxiang Fei Jincan Cui Yahui Sun Junhe Yang Shanglin Gao Jing Li | 2022 | Nano Materials Science2022，4，3： | 1 |
| 11 | Tunable light emission from carbon dots by controlling surface defects显示文摘Carbon dots(CDs)are metal-free fluorescent materials that can be used in optical and electronic devices,but few studies have focused on one-step synthesis routes for CDs with tunable color and high photoluminescence quantum yield(PLQY).Herein,CDs with tunable light emission were synthesized using a novel amide-assisted solvothermal approach.The as-prepared CDs were well dispersed and homogeneous,with average diameters of approximately 2.0–4.0 nm,depending on the dopants.Owing to the surface states with different ratios of nitrogen-and oxygen-related species,different CDs can exhibit blue,green,red,or white emission with relatively high PLQYs of 61.6%,41.3%,29.1%and 19.7%,respectively.XPS measurements,in conjunction with DFT calculations,indicate that nitrogen substitution(pyridinic/pyrrolic nitrogen)dominates the blue emission,while introducing oxygen functional groups lowered the LUMO energy level,which resulted in redder emission.In addition,the CDs are demonstrated as a bioimaging probe in both in vitro and in vivo assays,and the white light CDs have been demonstrated to be potential fluorescent materials for white-light-emitting diode(WLED). | Huijun Li Sancan Han Bowen Lyu Ting Hong Shibo Zhi Ling Xu Fengfeng Xue Liman Sai Junhe Yang Xianying Wang Bin He | 2021 | Chinese Chemical Letters2021，32，9： | 1 |
| 12 | Biomass‑Derived Carbon Materials for High‑Performance Supercapacitors:Current Status and Perspective显示文摘Supercapacitors are electrochemical energy storage systems that depend on high-surface-area electrodes and can play a dominant role in areas that require high power delivery or uptake.And of various electrodes,biomass-derived carbonaceous electrodes have recently shown impressive promise in high-performance supercapacitors because of their widespread availability,renewable nature and low-cost electricity storage.Based on this,this review will discuss the current status of biomass-derived carbon materials in supercapacitors and highlight current research with a specific emphasis on the influences of structure and elemental doping on the electrochemical performance of corresponding carbon electrodes.This review will also discuss the gap between laboratory achievements and practical utilization in terms of these biomass-derived carbon materials and outline practical strategies for future improvement. | Jiangqi Zhou Shilin Zhang Ya‑Nan Zhou Wei Tang Junhe Yang Chengxin Peng Zaiping Guo | 2021 | Electrochemical Energy Reviews2021，4，2： | 1 |
| 13 | Regulation of Water Masses to Hypoxia Zones in the Changjiang Estuary显示文摘The regulating ways of different water masses affecting the locations and intensities of hypoxia zones were studied based on the time-space continuum data from August 2011 to 2013–2017.The 6-year distribution of the hypoxic area in the Changjiang Estuary(CE)and its adjacent waters show that the hypoxic area can be divided into two segments.The southern segment is out of the south branch of the CE,whereas the northern segment is in the junction zone between the South Yellow Sea and the CE.The two segments were divided along the 31.5°–32°N latitude line.The northern and southern segments were dominated by the East China Sea shelf water(ECSSW)and Kuroshio subsurface water(KSW),respectively.When the KSW(salinity>34)intrusion reached the east of 123°E and south of 31°N,hypoxia zones mainly occurred in the southern segment covered by the Changjiang Diluted Water(CDW),meanwhile the Yellow Sea cold water mass may emerge in the northeastern area.When the KSW intensely invaded westward to the region between 122°and 122.5°E and northward to 31.5°N or further north,hypoxia zones appeared in the northern segment.The strength of the KSW with low dissolved oxygen concentration is the basic driving factor for the hypoxia occurrence in the CE.Moreover,the stratification is crucial for the southern segment,whereas the organic matter decomposition is dominated for the northern segment,even with severe hypoxia across the sea surface in the study area. | YANG Xingxing FAN Haimei ZHANG Hui CHEN Sisi YANG Ying JI Huanhong JIANG Xiaoshan DENG Bangping JIA Junhe | 2023 | Journal of Ocean University of China2023，22，4： | 0 |
| 14 | An all-in-one FeO_(x)-rGO sponge fabricated by solid-phase microwave thermal shock for water evaporation and purification显示文摘Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of freshwater.Despite much effort made into photothermal materials,there is an urgent need to design a rapidly synthesized photothermal evaporator for the comprehensive purification of complex seawater.Therefore,we report on all-in-one FeOx-rGO photothermal sponges synthesized via solid-phase microwave thermal shock.The narrow band gap of the semiconductor material Fe_(3)O_(4) greatly reduces the recombination of electron-hole pairs,enhancing non-radiative relaxation light absorption.The abundantπorbitals in rGO promote electron excitation and thermal vibration between the lattices.Control of the surface hydrophilicity and hydrophobicity promotes salt resistance while simultaneously achieving the purification of various complex polluted waters.The optimized GFM-3 sponge exhibitedan enhanced photothermal conversion rate of 97.3% and a water evaporation rate of 2.04 kg/(m^(2)·hr),showing promising synergistic water purification properties.These findings provide a highly efficient photothermal sponge for practical applicationsof seawater desalination and purification,as well as develop a super-rapid processing methodology for evaporation devices. | Youkun Sun Xiuwen Zhao Xueling Song Jinchen Fan Junhe Yang Yingchun Miao Shuning Xiao | 2024 | Journal of Environmental Sciences2024，，4： | 0 |
| 15 | Effect of doping order on metal-free heteroatoms dual-doped carbon as oxygen reduction electrocatalyst显示文摘Metal-free heteroatoms dual-doped carbon has been recognized as one of the most promising Pt/C-substitutes for oxygen reduction reaction(ORR).Herein,we optimize the preparation process by doping order of metal-free heteroatoms to obtain the best electrocatalytic performance through three types of dual-doped carbon,including XC-N(first X doping then N doping),NC-X(first N doping then X doping) and NXC(N and X doping)(X=P,S and F).XC-N has more defect than the other two indicated by Raman spectra.X-ray photoelectron spectrom(XPS) measurements indicate that N and X have been dual-doped into the carbon matrix with different doping contents and modes,Electrocatalytic results,including the potential of ORR peak(Ep),the half-wave potential,the diffusion-limiting current density mainly follows the order of XC-N>NC-X> NXC,Furthermore,the synergistic effect of second atom doping are also compared with the single doped carbon(NC,PC,SC and FC).The differences in electronegativity and atomic radius of these metal-free heteroatoms can affect the defect degree,the doping content and mode of hete roatoms on carbon matrix,induce polarization effect and space effect to affect O2 adsorption and product desorption,ultimately to the ORR electrocatalytic performance. | Hui-Juan Zhang Jing Geng Chunlei Cai Zi-Feng Ma Zhong Ma Wenli Yao Junhe Yang | 2021 | Chinese Chemical Letters2021，32，2： | 0 |
| 16 | Climate Change and Domestic Migration in China显示文摘This paper constructs theoretical and empirical models to investigate,under the influences of China’s hukou policy,the relationship between spikes in temperatures and temporary migrations of Chinese rural residents.Applying weather data from both the provincial and county levels,the paper first demonstrates the negative impacts of extremely high temperatures on agricultural production.Then,using a fixed effect model,and applying an individual-level panel dataset,which includes information from more than 30,000 Chinese rural residents,the paper shows that the likelihood of a rural resident’s future choice to work outside his or her village increases when crop yields decrease.This result confirms the hypothesis built in the paper’s utility maximization theoretical model of an individual rural resident.To mitigate the risks brought about by disasterinduced agricultural production decreases,the paper proposes reforms of,and improvements in existing agricultural policy insurance services. | YANG Junhe | 2018 | Chinese Journal of Urban and Environmental Studies2018，6，3： | 0 |
| 17 | Bluetooth Low Energy Device Identification Based on Link Layer Broadcast Packet Fingerprinting显示文摘With the rapid development of the Internet of Things(IoT),wireless technology has become an indispensable part of modern computing platforms and embedded systems.Wireless device fingerprint identification is deemed as a promising solution towards enhancing the security of device access authentication and communication process in the IoT scenario.However,the extraction of features from the network layer and its upper layers often confront restrictions from specific devices:the association with a certain wireless network and the access to the plaintext of the payload.Meanwhile,Bluetooth Low Energy(BLE)packets have been encrypted above the link layer,which makes those features difficult to extract.To tackle these problems,we introduce a novel method to identify BLE devices based on the fingerprint features in the data link layer.Initially,the BLE packets are collected through a receiver based on software-defined radio technology.Then,fields that reflect device differences in BLE broadcast packets are extracted through traffic analysis.Finally,a MultiLayer Perceptron(MLP)model is employed to recognize the category of BLE devices.An experimental result on a dataset with 15 types of BLE devices shows that the identification accuracy of the proposed method can reach 99.8%,which accomplishes better performance over previous work. | Jinghui Zhang Xinyang Li Junhe Li Qiangsheng Dai Zhen Ling Ming Yang | 2023 | Tsinghua Science and Technology2023，28，5： | 0 |
| 18 | Preparation and formaldehyde sensitive properties of N-GQDs/SnO2 nanocomposite显示文摘Graphene quantum dots(GQDs)have both the properties of graphene and semiconductor quantum dots,and exhibit stronger quantum confinement effect and boundary effect than graphene.In addition,the band gap of GQDs will transform to non-zero from 0 eV of graphene by surface functionalization,which can be dispersed in common solvents and compounded with solid materials.In this work,the SnO2 nanosheets were prepared by hydrothermal method.As the sensitizer,nitrogen-doped graphene quantum dots(N-GQDs)were prepared and composited with SnO2 nanosheets.Sensing performance of pristine SnO2 and N-GQDs/SnO2 were investigated with HCHO as the target gas.The response(Ra/Rg)of0.1%N-GQDs/SnO2 was 256 for 100 ppm HCHO at 60℃,which was about 2.2 times higher than pristine SnO2 nanosheet.In addition,the material also had excellent selectivity and low operation temperature.The high sensitivity of N-GQDs/SnO2 was attributed to the increase of active sites on materials surface and the electrical regulation of N-GQDs.This research is helpful to develop new HCHO gas sensor and expand the application field of GQDs. | Zhenlu Chen Ding Wang Xianying Wang Junhe Yang | 2020 | Chinese Chemical Letters2020，31，8： | 0 |
| 19 | Fabrication of Cu/graphite film/Cu sandwich composites with ultrahigh thermal conductivity for thermal management applications显示文摘Effective thermal management of electronic integrated devices with high powder density has become a serious issue,which requires materials with high thermal conductivity(TC).In order to solve the problem of weak bonding between graphite and Cu,a novel Cu/graphite film/Cu sandwich composite(Cu/GF/Cu composite)with ultrahigh TC was fabricated by electro-deposition.The micro-riveting structure was introduced to enhance the bonding strength between graphite film and deposited Cu layers by preparing a rectangular array of micro-holes on the graphite film before electrodeposition.TC and mechanical properties of the composites with different graphite volume fractions and current densities were investigated.The results showed that the TC enhancement generated by the micro-riveting structure for Cu/GF/Cu composites at low graphite content was more effective than that at high graphite content,and the strong texture orientation of deposited Cu resulted in high TC.Under the optimizing preparing condition,the highest in-plane TC reached 824.3 W·m^-1·K^-1,while the ultimate tensile strength of this composite was about four times higher than that of the graphite film. | Rui ZHAO Weikai L Tian WANG Ke ZHAN Zheng YANG Ya YAN Bin ZHAO Junhe YANG | 2020 | Frontiers of Materials Science2020，14，2： | 0 |
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