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Rational construction of Ag@MIL-88B(V)-derived hierarchical porous Ag-V_(2)O_(5) heterostructures with enhanced diffusion kinetics and cycling stability for aqueous zinc-ion batteries

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Journal of Energy Chemistry 2023年第2期77卷 561-571,I0015页

作者： Yibo Zhang Zhihua Li liangjun gong Xuyu Wang Peng Hu Jun Liu School of Materials Science and Engineering Central South UniversityChangsha 410083HunanChina Key Laboratory of Nonferrous Metal Materials Science and Engineering of Ministry of Education Central South UniversityChangsha 410083HunanChina School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina Fine Chemical Industry Research Institute School of ChemistrySun Yat-Sen UniversityGuangzhou 510275GuangdongChina

With the advantages of the multiple oxidation states and highly open crystal structures,vanadium-based composites have been considered as the promising cathode materials for aqueous zinc-ion batteries(ZIBs).However,the inherent inferior electrical conductivity,low specific surface area,and sluggish Zn^(2+)diffusion kinetics of the traditional vanadium-based oxides have greatly impeded their ***,a novel hierarchical porous spindle-shaped Ag-V_(2)O_(5) with unique heterostructures was rationally designed via a simple MOF-assisted synthetic method and applied as stable cathode for aqueous *** high specific surface area and hierarchically porous superstructures endowed Ag-V_(2)O_(5) with sufficient electrochemical active sites and shortened the diffusion pathways of Zn^(2+),which was beneficial to accelerate the reversible transport of Zn^(2+)and deliver a high specific capacity(426 mA h g^(-1) at 0.1 A g^(-1) and 96.5%capacity retention after 100 cycles).Meanwhile,the self-built-in electric fields at the heterointerface of Ag-V_(2)O_(5) electrode could strengthen the synergistic coupling interaction between Ag and V_(2)O_(5),which can effectively enhance the electric conductivity and maintain the structural integrity,resulting in superb rate capability(326.1 mA h g^(-1) at 5.0 A g^(-1))and remarkable cycling stability(89.7%capacity retention after 2000 cycles at 5.0 A g^(-1)).Moreover,the reversible Zn^(2+)storage mechanism was further investigated and elucidated by kinetics analysis and DFT calculations.

关键词： Aqueous zinc-ion batteries Metal-organic frameworks V_(2)O_(5) Heterostructures Nano silver

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Long-term changes in radial growth of seven tree species in the mixed broadleaf-Korean pine forest in Northeast China:Are deciduous trees favored by climate change?

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Journal of Forestry Research 2024年第5期35卷 63-77页

作者： Xiufang gong Danyang Yuan liangjun Zhu Zongshan Li Xiaochun Wang National Engineering Laboratory for Applied Technology of Forestry and Ecology in South China College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangsha 410004People’s Republic of China Center for Ecological Research and Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085People’s Republic of China

The role of the temperate mixed broadleaf-Korean pine forest(BKF)in global biogeochemical cycles will depend on how the tree species community responds to climate;however,species-specific responses and vulner-abilities of common trees in BKF to extreme climates are poorly *** we used dendrochronological meth-ods to assess radial growth of seven main tree species(Pinus koraiensis,Picea jezoensis,Abies nephrolepis,Fraxinus mandshurica,Phellodendron amurense,Quercus mongolica,and Ulmus davidiana)in an old-growth BKF in response to climate changes in the Xiaoxing’an Mountains and to improve predictions of changes in the tree species *** in most months and winter precipita-tion significantly negatively affected growth of *** and ***,but positively impacted growth of *** and the broadleaf species,especially ***-rica and *** and relative humidity in June significantly positively impacted the growth of most tree *** positive effect of the temperature during the previous non-growing season(PNG)on growth of *** and *** strengthened significantly with rapid warming around 1981,while the impact of PNG temperature on the growth of *** and *** changed from significantly negative to weakly negative or positive at this *** negative response of radial growth of *** and *** to precipitation during the growing season gradually weakened,and the negative response to PNG precipitation was *** the studied species,*** was the most resistant to drought,and *** recovered the best after extreme *** davidiana,*** and *** were more resistant to extreme cold than the other *** warming generally exacerbated the opposite growth patterns of conifer(decline)and broadleaf(increase)*** broadleaf tree species in the old-growth BKF probably will gradually become dominan

关键词： Tree rings Extreme climate Resistance and recovery Broad-leaved and Korean pine mixed forest

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我国户外运动法律制度初探

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湖北体育科技 2010年第1期29卷 43-44,28页

作者：龚君良熊冲中国地质大学(武汉) 湖北武汉430074 长江工程职业技术学院湖北武汉430121

随着我国户外运动产业的飞速发展,户外运动产业占国民经济比重将进一步提升,尤其在我国第三产业中所占的比重增长更为迅速,这就给行政管理部门带来相当大的压力。积极探索户外运动法制化对于有效降低户外运动中存在的风险,促进我国户外... 详细信息

随着我国户外运动产业的飞速发展,户外运动产业占国民经济比重将进一步提升,尤其在我国第三产业中所占的比重增长更为迅速,这就给行政管理部门带来相当大的压力。积极探索户外运动法制化对于有效降低户外运动中存在的风险,促进我国户外运动产业健康发展具有重大意义。

关键词：户外运动法律制度

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几种常用杀菌剂对马铃薯晚疫病防治效果比较研究

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农药科学与管理 2016年第7期37卷 41-44页

作者：郝丽萍巩亮军沈慧梅山西省植物保护植物检疫总站山西太原030001 静乐县植保站山西静乐034005 上海市农业技术推广服务中心上海201103

试验表明50%烯酰吗啉等九种杀菌剂对马铃薯晚疫病发病初期均有好的防效,药后7d防效均在81.5%以上。在马铃薯晚疫病初期施药,各药剂防效差异明显。第2次用药后7d,50%烯酰吗啉水分散粒剂、70%丙森锌可湿性粉剂、60%吡唑醚菌酯/代森联水分... 详细信息

试验表明50%烯酰吗啉等九种杀菌剂对马铃薯晚疫病发病初期均有好的防效,药后7d防效均在81.5%以上。在马铃薯晚疫病初期施药,各药剂防效差异明显。第2次用药后7d,50%烯酰吗啉水分散粒剂、70%丙森锌可湿性粉剂、60%吡唑醚菌酯/代森联水分散粒剂、72%霜脲·锰锌可湿性粉剂对马铃薯晚疫病防治效果在83%以上,且最后增产效果均在40%以上。而70%甲基硫茵灵可湿性粉剂等其它5种药剂的防病效果只在70%左右,增产幅度也低。各药剂对马铃薯安全,无药害表现。建议向农民首推50%烯酰吗啉水分散粒剂防治马铃薯晚疫病,其次是72%霜脲·锰锌可湿性粉剂、70%丙森锌可湿性粉剂和60%吡唑醚菌酯/代森联水分散粒剂。

关键词：杀菌剂马铃薯晚疫病药效试验

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基于多频电磁法水下目标体探测能力分析

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地球物理学进展 2024年第4期39卷 1658-1669页

作者：巩铭扬黄鑫严良俊谢兴兵周磊曹晓月油气资源与勘探技术教育部重点实验室(长江大学) 武汉430100

海洋资源对国家长足发展至关重要,如何完善海洋资源普查已经成为各国关注焦点.水下目标体的精准探测已成为地球物理领域研究的热点问题.电磁勘探方法以电阻率差异为基础,可以有效提取与识别水下高阻或高导目标体,是海洋地球物理探测的... 详细信息

海洋资源对国家长足发展至关重要,如何完善海洋资源普查已经成为各国关注焦点.水下目标体的精准探测已成为地球物理领域研究的热点问题.电磁勘探方法以电阻率差异为基础,可以有效提取与识别水下高阻或高导目标体,是海洋地球物理探测的关键技术之一.航空电磁法由于采用机载平台可快速完成海域区数据采集,在海域资源普查、环境监测等方面得到广泛应用.然而,海洋环境复杂多变,基于一维海—地地电模型的正演模拟与反演解释技术难以对三维复杂地电结构进行刻画,严重阻碍了机载平台的多频电磁数据的精细化解释.本文采用六面体网格谱元法进行海-地电模型高精度多频航空电磁三维正演.并对水下目标开展频率域电磁探测数值模拟分析,总结不同条件下频率域电磁场传播规律,探究多频电磁系统对水下目标体的识别能力,为多频电磁系统在低空海域高导目标体有效探测提供理论参考.

关键词：多频电磁法水下目标体三维正演谱元法

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Ultrathin covalent organic framework nanosheet-based photoregulated metal-free oxidase-like nanozyme

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Nano Research 2022年第10期15卷 8783-8790页

作者： Yongwu Peng Minchu Huang liangjun Chen Chengtao gong Nanjun Li Ying Huang Changming Cheng College of Materials Science and Engineering and College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics(CAEP)Mianyang 612900China Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource Yancheng Teachers UniversityYancheng 224007China

The exploration of low-cost and metal-free nanozymes with oxidase-mimicking activity is highly desired due to their attractive properties and potential ***,it is still challenging and remains unexploited to fully realize oxidase-like nanozyme in the emerging covalent organic frameworks(COFs)due to their polymeric nature and weak photoelectric *** herein report the first example of the preparation and oxidase-mimicking activity of novel ultrathin two-dimensional(2D)COF(termed as TTPA-COF)*** ultrathin TTPA-COF nanosheets with hexagonal layered structure are constructed from two flexible photoactive(diarylamino)benzene-based linkers,and exhibit remarkable catalytic activity toward the oxidation of 3,3',5,5'-tetramethylbenzidine(TMB)in the presence of O_(2) due to their large specific surface areas and abundant active ***,it is worth noting that the nanozyme activity could be regulated by external light *** on the oxidasemimicking activity of TTPA-COF nanosheets,a green colorimetric sensor is proposed for the sensitive and selective determination of glutathione(GSH)in a wide linear range of 0.5–40μM with a detection limit of 0.5μ*** work reported here would open new avenues for the exploration of low-cost and high-efficiency nanozymes,as well as extend the application of 2D COF nanosheets in the fields of catalysis and sensing.

关键词： covalent organic framework nanosheets ultrathin photoregulated metal-free oxidase mimics

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Two-dimensional covalent organic framework nanosheets:Synthesis and energy-related applications

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Chinese Chemical Letters 2022年第6期33卷 2867-2882页

作者： liangjun Chen Minchu Huang Bo Chen Chengtao gong Nanjun Li Hongfei Cheng Ye Chen Yongwu Peng Guodong Xu College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Department of Chemistry City University of Hong KongHong KongChina Department of Chemistry The Chinese University of Hong KongHong KongChina School of Chemistry and Environmental Engineering Yancheng Teachers UniversityYancheng 224007China Institute of Materials Research and Engineering A'STAR(Agency for Science Technology and Research)Innovis 138634Singapore

Two-dimensional(2D)covalent organic framework nanosheets(CONs)are attracting increasing research attention because of their unique properties derived from their ultrathin thickness,high surface-tovolume atomic ratio,and extremely large surface area.2D CONs can provide high transport pathways for charge carriers(e.g.,electrons,holes and ions)through either the conjugated skeletons or the open ***,they have shown great potential in energy related *** this review,we firstly introduce the recent developments and characteristics of 2D CONs by focusing on the two typical synthetic methods,i.e.,top-down and bottom-up ***,the energy-related applications in energy storage and conversion of 2D CONs are ***,we give our personal views on the challenges and perspectives for the future research of 2D CONs and their composites.

关键词： Covalent organic framework nanosheets Top-down method Bottom-up method Batteries Photocatalysts Electrocatalysts

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Emergence of photoluminescence on bulk MoS2 by laser thinning and gold particle decoration

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Nano Research 2018年第9期11卷 4574-4586页

作者： Lili gong Qi Zhang liangjun Wang Jianfeng Wu Cheng Han Bo Lei Wei Chen Goki Eda Kuan Eng Johnson Goh Chorng Haur Sow Department of Physics National University of Singapore Singapore 117542 Singapore Department of Chemistry National University of Singapore Singapore 117542 Singapore Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore 6 Science Drive 2 Singapore 117546 Singapore Institute of Materials Research and Engineering Agency for Science Technology and Research (A＊STAR) 2 Fusionopolis Way Innovis #08-03 Singapore 138634 Singapore

We demonstrate a facile and effective approach to significantly improve the photoluminescence of bulk MoS2 via laser thinning followed by gold particle decoration. Upon laser thinning of exfoliated bulk MoSz photoluminescence emerges from the laser-thinned region. After further treatment with an AuCl3 solution, gold particles self-assemble on the laser-thinned region and thick edges, further increasing the fluorescence of bulk MoS2 28 times and the Raman response 3 times. Such fluorescence enhancement can be attributed to both surface plasmon resonance and p-type doping induced by gold particles. The combination of laser thinning and AuCl3 treatment enables the functionalization of bulk MoS2 for optoelectronic applications. It can also provide a viable strategy for mask-free and area-selective p-type doping on single MoS2 flakes.

关键词： bulk MoS photoluminescence laser thinning gold particle plasmonic effect doping

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不同循环次数下RC桥墩抗震性能试验研究

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东南大学学报（自然科学版） 2019年第4期49卷 652-663页

作者：朱绩超贡金鑫熊亮军仇建磊李鑫大连理工大学土木工程学院大连116024 大连交通大学土木工程学院大连116028

通过轴压比为0.05和0.15的8个钢筋混凝土(RC)桥墩拟静力试验,研究不同荷载循环次数(同一位移幅值下分别循环3,10,20次)对RC桥墩的抗震性能影响.结果表明:循环往复荷载作用下试件破坏形态为弯剪破坏,主要破坏特征为混凝土斜向明显开裂、... 详细信息

通过轴压比为0.05和0.15的8个钢筋混凝土(RC)桥墩拟静力试验,研究不同荷载循环次数(同一位移幅值下分别循环3,10,20次)对RC桥墩的抗震性能影响.结果表明:循环往复荷载作用下试件破坏形态为弯剪破坏,主要破坏特征为混凝土斜向明显开裂、纵筋屈曲及箍筋断裂,滞回曲线有明显捏缩;随轴压比从0.05增大到0.15,RC桥墩的屈服荷载和极限荷载增大约50%,而极限位移明显减小,位移延性系数减小约30%;不同轴压比条件下,循环加载次数对试件抗震性能均有影响,在试件达到峰值荷载之前,循环加载次数对其承载能力和变形性能影响较小,而峰值荷载之后影响较大,变形能力明显降低,循环次数的增加会加重试件的累积损伤程度,进而削弱其抗震性能,尤其会在较大程度上降低其延性性能和耗能能力.

关键词：抗震性能荷载循环次数拟静力试验钢筋混凝土桥墩轴压比

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双根恒阻大变形锚杆在冲击载荷作用下的理论模型

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煤炭学报 2018年第S2期43卷 385-392页

作者：郝亮钧宫伟力何满潮宋彦琦中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室北京100083 中国矿业大学(北京)力学与建筑工程学院北京100083

为了指导工程开采中动力灾害下恒阻大变形锚杆群对围岩体的稳定性支护,基于双根恒阻大变形锚杆的并联支护原理和霍普金森冲击作用下双根恒阻锚杆的拉伸实验研究,建立了并联作用的双根恒阻大变形锚杆在冲击载荷下的力学模型,并且通过实... 详细信息

为了指导工程开采中动力灾害下恒阻大变形锚杆群对围岩体的稳定性支护,基于双根恒阻大变形锚杆的并联支护原理和霍普金森冲击作用下双根恒阻锚杆的拉伸实验研究,建立了并联作用的双根恒阻大变形锚杆在冲击载荷下的力学模型,并且通过实验结果对比验证了理论模型的可靠性和正确性,进一步得到了双根恒阻大变形锚杆的位移时程曲线和载荷位移关系曲线。研究表明:并联作用的双根恒阻大变形锚杆在冲击载荷作用下,首先通过杆柄的拉伸产生弹性变形;当杆柄内力达到锚杆恒阻力后,开始产生结构变形,套管和杆柄发生相对滑移;套管速度减为零时,结构变形结束,套管和杆柄共同弹性恢复。此外,冲击载荷作用下双恒阻锚杆的位移峰值要明显滞后于载荷峰值。

关键词：并联支护恒阻大变形锚杆动力学模型冲击拉伸实验

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