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Modulation doping of p-type Cu_(12)Sb_(4)S_(13)toward improving thermoelectric performance

Journal of Materials Science & Technology 2024年第4期171卷 71-79页

作者： Khak Ho Lim Mingquan Li Yu Zhang Yue Wu Qimin Zhou qingyue wang Xuan Yang Pingwei Liu Wen-Jun wang Ka Wai Wong Ka Ming Ng Yu Liu Andreu Cabot Institute of Zhejiang University-Quzhou Quzhou 324000China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310007China School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China Materials Research Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Ostia Technologies Limited United Kingdom Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayHong KongChina ICREA Pg.Lluis Companys 23Barcelona 08010Spain Catalonia Energy Research Institute-IREC Sant Adria del BesosBarcelona 08930Spain

The commercial viability of thermoelectric(TE)devices relies heavily on two factors:cost reduction and efficiency *** this study,we first produce p-type Cu_(12)Sb_(4)S_(16-x)(x=0,3,4)using a low-temperature bottom-up approach and demonstrate Cu_(12)Sb_(4)S_(13)to show the best TE performance among the three tested ***,the TE energy conversion efficiency of Cu_(12)Sb_(4)S_(13)is further enhanced by optimizing its electronic band structure through the incorporation of small amounts of *** an optimal Te content of 5 mol%,more than a twofold increase in the TE figure of merit(zT)is *** gain insight into the mechanism of improvement on the transport properties of the mate-rial,we compare the interphase transport mechanism by incorporating nanodomains of different metals(Ag and Cu)into the Cu_(12)Sb_(4)S_(13)*** improved electrical conductivity obtained with Cu_(12)Sb_(4)S_(13)-Te nanocomposites is attributed to a charge flooding of the Cu_(12)Sb_(4)S_(13)*** contrast,excessive down-ward band-bending at the interphases of Ag/Cu metal-semiconductor drastically reduces the electrical ***,a weighted mobility(μw)analysis shows a dominant thermal activation of carri-ers in Cu_(12)Sb_(4)S_(13)-Te *** this material,a strong decrease in lattice thermal conductivity is also found,which is associated with a phonon-carrier scattering *** work shows the impor-tance of proper band-engineering in TE nanocomposites to decouple electrical and thermal transport to enhance TE performance,and the efficacy ofμw for electrical and thermal transport analysis.

关键词： Modulation doping Thermoelectric Interphase transport Charge flooding Phonon-carrier scattering

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传承“五常”教育,激发学生内驱力--以高职院校为例

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文化创新比较研究 2024年第9期8卷 115-118页

作者：王清月河南农业职业学院河南郑州450000

儒家“五常”教育是中华民族独有的精神财富。在新时代要求之下,高职院校弘扬“仁、义、礼、智、信”为核心的教育观具有重要意义,引领青年大学生树立正确的价值观、责任感、使命感,也是实现中国梦的精神力量。弘扬儒家“五常”教育之... 详细信息

儒家“五常”教育是中华民族独有的精神财富。在新时代要求之下,高职院校弘扬“仁、义、礼、智、信”为核心的教育观具有重要意义,引领青年大学生树立正确的价值观、责任感、使命感,也是实现中国梦的精神力量。弘扬儒家“五常”教育之下对新问题所作的探索与应对,尤其是传统教育之下学生学习方式的变化,颠覆了以往仅从书本获取知识的途径。该文从学生出发剖析高职院校传承弘扬儒家“五常”教育的对策。主要通过重视学团活动,与新媒体深度融合,以知促行、以行求知和完善评价机制等方式来激发学生兴趣,提高学习能力,提升学生学习的积极性和主观能动性,提高学生整体素质,为社会主义现代化建设培养有为青年。

关键词：传统文化 “五常” “五常”教育新问题学生内驱力途径

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聚酯合成催化技术的研究进展

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高校化学工程学报 2024年第1期38卷 1-13页

作者：王翼嵩王松林姜冰雪李家旭邓维史胜斌 LIM Khak Ho 王青月杨轩刘平伟王文俊浙江大学化学工程联合国家重点实验室浙江杭州310058 浙江大学衢州研究院浙江衢州324000 浙江恒逸石化有限公司浙江杭州311209

聚酯工业的进步离不开先进的催化技术。本文对聚酯合成催化体系的研究进展进行了评述。着眼于目前占主导的金属催化剂,对锑、钛、锡、锗、铝等催化剂在活性、副反应等方面所开展的金属复合、配体改性、载体负载等工作进行了总结,介绍了... 详细信息

聚酯工业的进步离不开先进的催化技术。本文对聚酯合成催化体系的研究进展进行了评述。着眼于目前占主导的金属催化剂,对锑、钛、锡、锗、铝等催化剂在活性、副反应等方面所开展的金属复合、配体改性、载体负载等工作进行了总结,介绍了有机物、离子液体、酶等非金属催化体系的研究进展,并对促进聚酯合成的电、光、微波等催化辅助技术进行了评述。催化能力强、副反应少、聚合条件温和催化体系的开发有助于聚酯品质的提升,将先进的表征手段、模型研究以及聚酯构效关系规律探索结合到催化体系的研究中,可加速高效聚酯催化技术的研发。

关键词：聚酯金属催化剂缩聚开环聚合非金属催化剂

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Numerical study of the seasonal salinity budget of the upper ocean in the Bay of Bengal in 2014

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Journal of Oceanology and Limnology 2021年第4期39卷 1169-1187页

作者： qingyue wang Changming DONG Junde LI Jingsong YANG Qing TIAN School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China

Impact factors on the salinity budget, especially the eddy salt fluxes and smaller-scale diffusive salt fluxes for the upper 50 m of the Bay of Bengal(BoB) in 2014 are investigated using a box model based on the Regional Ocean Modeling System(ROMS) daily outputs. The model results reproduce that the precipitation and river runoff s are the dominant factors modulating the sharp salinity decrease during the summer monsoon season. The analysis shows that the salinity increase after the summer monsoon is mostly due to the meridional advective and diffusive salt fluxes. The vertical advective salt flux, which is sensitive to the different signals of the wind stress curl, plays an important role in balancing the salinity change induced by the meridional advective salt flux during both the summer and winter monsoon seasons. Distinctive spatial mesoscale structures are presented in the eddy salt flux throughout the year, and their contributions are sizeable(over 30% in the meridional direction and about 10%–30% in the vertical direction). The meridional eddy salt flux is larger in the monsoon seasons than that in the inter-monsoon seasons, and in a positive pattern near the western boundary during the winter monsoon and autumn inter-monsoon. The vertical eddy salt flux makes an important contribution to the salinity budget, especially along the coastal area and around the Andaman and Nicobar Islands. The vertical eddy salt flux becomes large when a tropical cyclone passes the area.

关键词： salinity budget Bay of Bengal Regional Ocean Modeling System(ROMS) monsoon eddy flux

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Progress of polymer reaction engineering:From process engineering to product engineering

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Chinese Journal of Chemical Engineering 2022年第10期50卷 3-11页

作者： Pingwei Liu Jigang Du Yuting Ma qingyue wang Khak Ho Lim Bo-Geng Li State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Quzhou 324000China

Polymer reaction engineering studies the design,operation,and optimization of reactors for industrial scale polymerization,based on the theory of polymerization kinetics and transfer processes(e.g.,flow,heat and mass transfer).Although the foundation and development of this discipline are less than80 years,the global production of polymers has exceeded 400 million tons per *** demonstrates that polymer reaction engineering is of vital importance to the polymer *** with the matu rity of production processes and market saturation for bulk polymers,emerging industries such as information technology,modern transportation,biomedicine,and new energy have continued to *** a result,the research objective for polymer reaction engineering has gradually shifted from maximizing the efficiency of the polymerization process to the precise regulation of high-end product-oriented macro molecules and their aggregation structures,i.e.,from polymer process engineering to polymer product *** this review,the frontiers of polymer reaction engineering are introduced,including the precise regulation of polymer chain structure,the control of primary aggregation structure,and the rational design of polymer *** narrow down the topic to the polymerization reaction engineering of vinyl ***,the future prospects are provided for the field of polymer reaction engineering.

关键词： Controlled polymerization Polymer chainstructure Primary aggregationstructure Rational design Numerical controlmanufacturing

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Numerical analysis of mode locking in multi-core photonic crystal fiber

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Chinese Science Bulletin 2010年第18期55卷 1864-1869页

作者： FANG XiaoHui HU MingLie LI YanFeng CHAI Lu wang qingyue Ultrafast Laser Laboratory Key Laboratory of Optoelectronic Information Science and Technology of Ministry of Education College of Preci-sion Instruments and Optoelectronics Engineering Tianjin University Tianjin 300072 China

With linearly coupled nonlinear Schrodinger equations,numerical analysis has been performed on the mode locking forming procedure of a fiber laser in the linear cavity *** fiber is Yb-doped multi-core photonic crystal fiber and semiconductor saturable absorber mirror(SESAM) is adopted as the nonlinear transmission element to start mode *** of the noise randomness,initial pulse would be picked out by SESAM in one or more cores which makes the multi-core mode locking quite different from single-core *** two situations are compared and fully *** locking in multi-core photonic crystal fiber laser can be realized only if the couple coefficient between the cores and the temporal overlap between the pulses in different cores are large enough.

关键词：光子晶体光纤激光器模式锁定数值分析耦合非线性薛定谔方程多芯光子晶体纤维非线性传输可饱和吸收

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Study of a water-soluble supramolecular complex of curcumin andβ-cyclodextrin polymer with electrochemical property and potential anti-cancer activity

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Chinese Chemical Letters 2022年第8期33卷 4043-4047页

作者： wang Zhang Ping Xiao Liwei Lin Fang Guo qingyue wang Yuanzhe Piao Guowang Diao School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Department of Applied Bioengineering Graduate School of Convergence Science and TechnologySeoul National UniversitySuwon 443-270Republic of Korea Shanghai Suni Biotechnology Development Co. Ltd.Shanghai 201300China Advanced Institutes of Convergence Technology Suwon 443-270Republic of Korea

As a member of the curcuminoid compound family,curcumin(Cur)has many interesting therapeutic ***,its low aqueous solubility and stability have resulted in poor bioavailability and restricted clinical *** on size matching,β-cyclodextrin polymer(β-CDP),with its hydrophilic polymer chains and hydrophobic cavities,can form an inclusion complex with *** improve the water solubility and stability of Cur,a simple and eco-friendly grinding method was designed to formβ-CDP inclusion *** to the Boltzmann-Hamel's method and Job's method,the molar ratio of theβ-CD unit inβ-CDP to Cur was determined to be 1:*** diffusion coefficient and diffusion activation energy of Cur-β-CDP were calculated in an electrochemical *** supramolecular complex worked well in vitro to inhibit the proliferation of hepatoma carcinoma cells ***,this method visibly reduced the undesirable side effects on normal cells,without weakening the anti-cancer activity of the *** expect that the obtained host-guest complex will provide a new approach for delivering natural drug molecules,having low water solubility.

关键词： Cyclodextrin polymer Curcumin Solubility Anti-cancer activity Supramolecular complex

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Size distribution of chemical elements and their source apportionment in ambient coarse, fine, and ultrafine particles in Shanghai urban summer atmosphere

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Journal of Environmental Sciences 2012年第5期24卷 882-890页

作者： Senlin Lu Rui Zhang Zhenkun Yao Fei Yi Jingjing Ren Minghong Wu Man Feng qingyue wang Shanghai Applied Radiation Institute School of Environmental and Chemical engineeringShanghai UniversityShanghai 201800China Graduate School of Science and Engineering Saitama University255 Shimo-OkuboSatura-KuSaitama CitySaitama 338–8570Japan

Ambient coarse particles （diameter 1.8-10 μm）, fine particles （diameter 0.1-1.8 μm）, and ultrafine particles （diameter 〈 0.1 μm） in the atmosphere of the city of Shanghai were sampled during the summer of 2008 （from Aug 27 to Sep 08）. Microscopic characterization of the particles was investigated by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy （SEM/EDX）. Mass concentrations of Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Br, Rb, Sr, and Pb in the size-resolved particles were quantified by using synchrotron radiation X-ray fluorescence （SRXRF）. Source apportionment of the chemical elements was analyzed by means of an enrichment factor method. Our results showed that the average mass concentrations of coarse particles, fine particles and ultrafine particles in the summer air were 9.38 ± 2.18, 8.82 ± 3.52, and 2.02 ± 0.41 μg/m3, respectively. The mass percentage of the fine particles accounted for 51.47% in the total mass of PM10, indicating that fine particles are the major component in the Shanghai ambient particles. SEM/EDX results showed that the coarse particles were dominated by minerals, fine particles by soot aggregates and fly ashes, and ultrafine particles by soot particles and unidentified particles. SRXRF results demonstrated that crustal elements were mainly distributed in the coarse particles, while heavy metals were in higher proportions in the fine particles. Source apportionment revealed that Si, K, Ca, Fe, Mn, Rb, and Sr were from crustal sources, and S, Cl, Cu, Zn, As, Se, Br, and Pb from anthropogenic sources. Levels of P, V, Cr, and Ni in particles might be contributed from multi-sources, and need further investigation.

关键词： airborne size-resolved particles chemical elements distribution source apportionment

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Relationships between chemical elements of PM2.5 and O3 in Shanghai atmosphere based on the 1-year monitoring observation

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Journal of Environmental Sciences 2020年第9期32卷 49-57页

作者： Junyang Zeng Luying Zhang Chuanhe Yao Tingting Xie Lanfang Rao Hui Lu Xinchun Liu qingyue wang Senlin Lu School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China Institute of Desert Meteorology China Meteorological AdministrationUrumqi 83002China School of Science and Engineering Saitama UniversitySaitama 338-8570Japan

Mass level of fine particles(PM2.5)in main cities in China has decreased significantly in recent years due to implementation of Chinese Clean Air Action Plan since 2013,however,03 pollution is getting worse than before,especially in megacities such as in *** this work,O3 and PM2.5 were continuously monitored from May 27,2018 to March 31,*** data showed that the annual average concentration of PM2.5 and O3(O3-8 hr,maximum8-hour moving average of ozone days)was 39.35±35.74 and 86.49±41.65μg/m3,*** concentrations of PM2.5 showed clear seasonal trends,with higher concentrations in winter(83.36±18.66μg/m3)and lower concentrations in summer(19.85±7.23μg/m3),however,the seasonal trends of O3 were different with 103.75±41.77μg/m3 in summer and58.59±21.40μg/m3 in *** mass backward trajectory,analyzing results of potential source contribution function model and concentration weighted trajectory model implied that pollutants from northwestern China contributed significantly to the mass concentration of Shanghai PM2.5,while pollutants from areas of eastern coastal provinces and South China Sea contributed significantly to the mass level of ozone in Shanghai *** concentration of twenty-one elements in the PM2.5 were investigated,and their relationships with O3 were *** level of ozone had good correlation with that of Ba(r=0.64,p0.05),suggesting vehicle emission pollutants contribute to the increasing concentration of ozone in Shanghai atmosphere.

关键词： pollution ozone elements

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EFFECT OF CARBON CONTENT ON PROPERTIES OF SLACK-QUENCHED RAILS

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Acta Metallurgica Sinica(English Letters) 1992年第5期5卷 349-353页

作者： ZHOU qingyue wang Shuqing SHAO Yangdao NIE Shufan ZHOU Zhenguo China Academy of Railway Sciences,Beijing China Acad of Railway Science Beijing China

A comparative investigation was carried out of the routine mechanical properties,fracture toughness,microstructure and hardness of slack-quenched rails containing different carbon *** the rails slack-quenched,their strength and toughness,together with ductility, are obviously improved,and the higher the quench hardening is,the more the resistance to wear and shell will *** was also made of the reason for this improvement and of the effect of carbon content and quench hardening on the properties of rails in combination with the rail-laying trial.

关键词： carbon content slack-quenched rail property

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