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Active La-Nb-O compounds for fast lithium-ion energy storage

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Tungsten 2019年第4期1卷 287-296页

作者： Kunfeng Chen shu yin Dongfeng Xue State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980‑8577Japan

Searching for novel complex materials with enhanced lithium-ion battery performances is one of the most challenging *** kinds of transition metal oxides and polyanionic frameworks were developed with various structures,which can improve the energy density of lithium-ion *** this work,we explored 4d and 4f transition metal La-Nb-O compounds as cathode materials for lithium-ion energy *** pyrochlore LaNb_(5)O_(14),orthorhombic perovskite LaNb_(3)O_(9),and monoclinic LaNbO_(4) compounds with different metal cation coordination polyhedra were synthesized using solid-state *** orthorhombic pyrochlore LaNb_(5)O_(14) compound showed the highest capacity among these La-Nb-O compounds owing to its quasi‐2D network for Li‐ion *** to the electronegativity theory and ionic size,La^(3+)cations can form LaO12 polyhedra and hexahedral LaO_(8) units in different La-Nb-O compounds,which can stabilize octahedral NbO_(6) and/or pentahedral NbO_(7) and their assembled structures,resulting in easy lithium-ion *** work may provide some structure clues for the design of electrode materials for fast lithium storage.

关键词： Lanthanum orthoniobates Pyrochlore Perovskite Multiple cation materials Lithium-ion battery

Improved thermochromic and photocatalytic activities of F-VO_(2)/ Nb-TiO_(2) multifunctional coating films

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Tungsten 2019年第4期1卷 306-317页

作者： Anung Riapanitra Yusuke Asakura shu yin Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980‑8577Japan

Multifunctional photocatalytic and thermochromic composites consisting of fluorine-doped vanadium dioxide(F-VO_(2))and niobium-doped TiO_(2)(NTO)were prepared by a simple physical *** composites exhibited a higher thermochromic activity and nitrogen oxide(NO_(x))decomposition activity than that of pristine VO_(2)/*** VO_(2) and NTO materials were synthesized using an environmentally friendly soft chemical solvothermal/hydrothermal process,which produced NTO nanoparticles with a controllable morphology and particle size by changing the ratio of ethanol and acetic acid sol-vent.F-VO_(2)/NTO showed a better multifunctionality of thermochromic and photocatalytic activities than those of VO_(2)/NTO *** coexistence coating films showed a better effect on thermochromic and deNO_(x)(NO_(x) reduction)activity than those of double-sided films for F-VO_(2)/NTO *** best thermochromic and photocatalytic activities obtained from sample F-VO_(2)/NTO 60 showed the ΔT_(1500 nm)[difference of transmittance(ΔT)at the wavelength of 1500 nm under 25°C and 95°C]of up to 29.5%and deNO_(x) activity of up to 40%at λ>290 nm under mercury lamp *** use of F-VO_(2)/NTO coexistence coating films showed the appropriateness for multifunctional materials.

关键词： Nb-doped TiO_(2) VO_(2)(M) Thermochromic Photocatalytic NO_(x)decomposition Multifunctional coating

Recent progress on mixed-anion type visible-light induced photocatalysts

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Science China(Technological Sciences) 2017年第10期60卷 1447-1457页

作者： ZHAO ZhiHuan FAN JiMin CHANG HongHong ASAKURA Yusuke yin shu College of Chemistry and Chemical Engineering Taiyuan University of Technology Institute of Multidisciplinary Research for Advanced Materials Tohoku University 2-1-1Katahira

Environmentally friendly soft chemical processes, including solvothermal/hydrothermal process and mechanochemical process,for the synthesis of mixed anion type visible-lightinduced photocatalysts are introduced in this review paper. Titania and strontium titanate based anion doped photocatalysts can be effectively prepared at such low-temperature as below 200 ℃. Especially,the mechanochemical process is a useful method for the synthesis of various mixed ions doping functional materials at low temperatures. The mixed anion type photocatalytic compounds consisted of N/O, N/F/O, S/O, N/C/O, show excellent visible light absorption ability and photocatalytic activities, indicating the potential applications in environmental purifications. Full-spectra active long wavelength light induced photocatalyst, full-time active photocatalyst system and infrared radiation(IR) shielding multifunctional photocatalysts will be introduced also.

关键词： solvothermal hydrothermal mechanochemical mixed-anion visible light induced photocatalyst

煤矿低浓度生活污水净化回收装置的设计与实施效果分析

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价值工程 2024年第19期43卷 63-66页

作者：尹树林杨庚慧苑鑫山西灵石华苑煤业有限公司晋中031302

文章设计了一套包括底座、水泵、空气泵和预处理清理机构的设备,用于煤矿低浓度生活污水净化回收装置的研究。该装置在处理煤矿生活污水方面的效果,通过对设计组成、工作原理、技术参数和规格等方面的分析,并结合实施案例分析进行了评... 详细信息

文章设计了一套包括底座、水泵、空气泵和预处理清理机构的设备,用于煤矿低浓度生活污水净化回收装置的研究。该装置在处理煤矿生活污水方面的效果,通过对设计组成、工作原理、技术参数和规格等方面的分析,并结合实施案例分析进行了评估。通过数据分析和成果展示,揭示了该装置的技术优势和创新点,提高了污水处理效率,实现了回收水质量的优化和设备运行稳定性的保障。对装置的应用前景、提升价值等方面进行了探讨。

关键词：煤矿低浓度生活污水净化回收装置设计与实施效果分析污水处理效率

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Solvothermal Synthesis of Visible Light Responsive Titania Nanocrystals at Moderate Temperature

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功能材料 2004年第Z1期35卷 1426-1432页

作者： SATO Tsugio yin shu WANG Jin-shu Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980-8577Japan School of Materials Science and Engineering Beijing University of TechnologyBeijing 100022China

Visible light responsive nitrogen-doped titania nanocrystals were prepared by "Homogeneous Precipitation-Solvothermal Process" in TiCl3-hexamethylenetetramine (C6Hi2N4) mixed solution. The phase composition, crystallinity, microstructure and specific surface area of titania greatly changed depending on pH,solvent and temperature. The titania powders prepared in TiCl3-hexamethylenetetramine aqueous solutions at pH 1～6 and 190℃ for 2 h consisted of single phase of brookite and that prepared at pH 9 was single phase of rutile. On the other hand, the sample prepared in the presence of methanol at pH 9 consisted of single phase of anatase. All titania powders prepared in the present study were yellow and showed excellent visible light absorption property and photocatalytic ability for NO destruction under irradiation of the visible light (λ＞510nm). The photocatalytic activity of the sample possessing similar specific surface area was in the order anatase ＞ brookite ＞ rutile. The photocatalytic activity of nitrogen doped titania under irradiation of visible light (λ＞510 nm) slightly decreased with increasing calcination temperature up to 600℃ and then greatly decreased at 800 C. The visible light responsive photocatalytic activity of rutile titania nanoparticles could be improved by forming nanocomposite with layered tetratitanate possessing high specific surface area via a delamination-reassembly process of K2Ti4O9 combined with planetary ball-milling.

关键词： solvothermal reaction titania visiblelight responsive photocatalyst nitrogendoping nanocomposite

中国气候政策不确定性指数:构建、分析与应用前景

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气候变化研究进展 2024年第3期20卷 361-372页

作者：陈国荣王苏萨邓晶侯浩一尹书琪冯玮曲浩泽北京林业大学经济管理学院北京100083 北京林业大学工学院北京100083

为确保“双碳”目标如期实现,中国政府加快了气候相关政策的制定和实施,可能导致气候政策不确定性升高,进而对社会经济产生影响,因此准确度量气候政策不确定性具有重要意义。基于2008—2023年中国13家主流新闻报纸的气候政策不确定性关... 详细信息

为确保“双碳”目标如期实现,中国政府加快了气候相关政策的制定和实施,可能导致气候政策不确定性升高,进而对社会经济产生影响,因此准确度量气候政策不确定性具有重要意义。基于2008—2023年中国13家主流新闻报纸的气候政策不确定性关键词频率,采用文本挖掘技术,构建了中国气候政策不确定性指数,并通过时间区间替换、国内外对比来验证指数的稳健性和有效性。结果发现:中国应对气候变化的政策可以划分为起步期、发展期、夯实期和深化期四个阶段,中国气候政策不确定性指数可以准确识别每个阶段的发展历程。与国外指数相比,中国气候政策不确定性指数不仅可以反映与中国相关的重大国际气候政策事件,也可以体现中国独特的气候政策变化和发展特点。该指数未来可以为政府部门制定气候政策、企业应对气候变化、金融机构管理气候风险、投资者提高投资效率等方面提供借鉴和参考。

关键词：中国气候政策不确定性指数文本分析

Pricing Based Power Control for Inter-Cell UAV-Assisted Vehicle-to-Vehicle Underlay Communication

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China Communications 2019年第1期16卷 57-68页

作者： Qin Wang Ye Chen shu yin Lei Tian Yongan Guo Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications School of Engineering & Computing Sciences New York Institute of Technology College of Overseas Education Nanjing University of Posts and Telecommunications

The high-capacity vehicle-to-vehicle(V2 V) communication provides a promising solution to support ubiquitous media streaming and content sharing among *** extend the V2 V links to multiple cells and manage the inter-cell interference,we proposed an UAV-assisted inter-cell V2 V communication model,in which a shared UAV node is placed in the center of V2 V *** charging the V2 V users underlay spectrum access fee,the cellular network earn profit at the cost of encountering co-channel interference from V2 V links.A Stackelberg game is formulated to model the interactions between the V2 V links and the cellular links,which are the game follower and the leader *** utility functions are maximized in terms of accessing price as well as transmit power of V2 V users and UAV *** evaluations verify that the power-price tradeoff between V2 V network and cellular network has significant potentials to enhance their utility.

关键词： UAV-assisted communication inter-cell V2V Stackelberg game IoT economics

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我国民族传统体育文化国际传播能力建设探赜

体育文化导刊 2024年第1期 15-21页

作者：王保龙尹树来谭朝文陈培友南京师范大学体育科学学院南京210023 南京邮电大学体育部南京210023

运用文献分析、逻辑分析等方法,厘析我国民族传统体育文化国际传播能力建设内涵,阐释传播能力建设价值与困境,并提出建设策略。价值:讲好中国体育故事,促进文化交流互鉴;增强中华文化自信,助力文化强国建设;推动国家形象塑造,提升国家... 详细信息

运用文献分析、逻辑分析等方法,厘析我国民族传统体育文化国际传播能力建设内涵,阐释传播能力建设价值与困境,并提出建设策略。价值:讲好中国体育故事,促进文化交流互鉴;增强中华文化自信,助力文化强国建设;推动国家形象塑造,提升国家形象亲和力。困境:传播主体协同不足,传播内容生产不优,传播渠道建设质量不高,受众分析不足,传播影响力不强。策略:以协同为基点构建传播共同体;以完善叙事体系为突破优化传播内容;以媒介资源整合为动力加强传播渠道建设;以信息平台建设为抓手深化受众分析;以提升“内力”为根本增强国际传播影响力。

关键词：体育管理民族传统体育文化国际传播能力

基于高通量测序技术开发酱肘子天然香料抑菌剂

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食品安全质量检测学报 2024年第17期15卷 166-175页

作者：申润凡田影刘刚尹淑涛中国农业大学食品科学与营养工程学院北京100083 北京天福号食品有限公司北京101300

目的在不影响酱卤肉制品口感情况下开发天然香料抑菌剂,并延长酱肘子的货架期。方法基于高通量测序技术确定了酱肘子在储藏过程中的优势腐败微生物,并选择3种天然食品香料百里香酚、丁香酚、肉桂醛作为复配抑菌剂,以优势腐败菌抑菌圈直... 详细信息

目的在不影响酱卤肉制品口感情况下开发天然香料抑菌剂,并延长酱肘子的货架期。方法基于高通量测序技术确定了酱肘子在储藏过程中的优势腐败微生物,并选择3种天然食品香料百里香酚、丁香酚、肉桂醛作为复配抑菌剂,以优势腐败菌抑菌圈直径为指标,进行单因素与响应面实验。同时,选择效果最好的抑菌剂配方比例进行抑菌效果验证检验。结果酱肘子贮藏中优势腐败菌为阴沟肠杆菌(Enterobacter inguinarum)、蜡样芽胞杆菌(Bacillus cereus)和费格森埃希菌(Escherichia fergusonii)。效果最好的天然香料抑菌剂复配比例为百里香酚5.577 g/kg、丁香酚20.710 g/kg、肉桂醛2.667 g/kg。加入复配抑菌剂后,腐败菌的生长得到控制,产品变酸速率变慢,感官品质劣变速率变慢。以微生物为指标,25℃贮存条件下的货架期延长了38 h。结论本研究开发的抑菌配方可以很好的解决酱肘子储藏过程中的腐败问题,为酱卤肉制品抑菌剂的开发提供了参考。

关键词：酱肘子优势腐败菌天然香料抑菌剂阴沟肠杆菌