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Paired-Pd(Ⅱ) centers embedded in HKUST-1 framework: Tuning the selectivity from dimethyl carbonate to dimethyl oxalate

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Journal of Energy Chemistry 2022年第4期31卷 233-240页

作者： Hong-Zi Tan Zhe-ning Chen Kai-Qiang jing jing Sun Yu-Ping Xu ning-ning Zhang Zhong-ning Xu Guo-Cong Guo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina School of Chemistry&Chemical Engineering Shandong University of TechnologyZibo 255049ShandongChina School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252000ShandongChina

CO oxidative coupling to dimethyl oxalate(DMO) is the most crucial step in coal to ethylene glycol. Pdbased supported catalysts have been verified effective for generating DMO, but concomitant generation of dimethyl carbonate(DMC) is always unavoidable. It is generally accepted that Pd(0) is the active species for producing DMO, while Pd(II) for DMC. However, density functional theory calculations have proposed that the selectivity to DMO or DMC highly depends on the space state of Pd species rather than its oxidative state. It is thus urgently desired to develop high-efficient catalysts with well-defined structure,and further to elucidate the structure-performance relationship. In this work, HKUST-1 with unique structure of paired-Cu(Ⅱ) centers was chosen as ideal support to construct the catalysts with respective paired-Pd(Ⅱ) centers and isolated-Pd(Ⅱ) centers via in situ Pd species doping. In despite of featuring Pdδ+(δ≈2) oxidation state, the synthesized paired-Pd(Ⅱ)/HKUST-1 catalyst still exhibited DMO as dominant product(90.8% of DMO selectivity). For isolated-Pd(Ⅱ)/HKUST-1 catalyst, however, the main product was DMC(84.8% of DMC selectivity). Based on catalyst characterizations, the structures of paired-Pd(Ⅱ) centers and isolated-Pd(Ⅱ) centers were determined. DMO was generated from the coupling of adjacent *COOCH;intermediates adsorbed on paired-Pd(Ⅱ) centers, while DMC was produced from the reaction between methyl nitrite and the *COOCH;intermediates formed on isolated-Pd(Ⅱ) centers. Current work is the first MOFs-based catalyst with well-defined structure being applied in CO oxidative coupling reaction, which not only sheds light on the structure-performance relationship, but also inspires the potential of using MOFs as tunable platform to design high-efficient catalysts in heterogeneous catalysis.

关键词： CO Methyl nitrite Oxidative coupling Dimethyl oxalate Paired-Pd(Ⅱ)centers HKUST-1

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Facile fabrication of self-healing silicone-based poly(urea-thiourea)/tannic acid composite for anti-biofouling

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Journal of Materials Science & Technology 2022年第29期124卷 1-13页

作者： Jiawen Sun Chao liu Jizhou Duan Jie liu Xucheng Dong Yimeng Zhang ning Wang jing Wang Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100039China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China College of Resources and Environment Hunan Agricultural UniversityChangsha 410128China

A novel silicone-based poly(urea-thiourea)/tannic acid composite(PDMS-P(Ua-TUa)-TA)with excellent mechanical,self-healing and antifouling properties is *** multiple dynamic hydrogen bonds formed by thiourea groups,urea groups,and tannic acid(TA)molecules ensured a tough elastomer(ultimate strength:2.47 MPa)with high stretchability(~1000%).TA molecules as partial hydrogen bonding cross-linking sites interacted rapidly with urea and thiourea groups before the migration of polymer chains,resulting in fast and efficient *** on the film completely disappeared within12 min,and the repair efficiency of strength was up to 98.4%within 3 h under ambient *** behavior was also evaluated in artificial seawater and the healing efficiency(HE)was 95.1%.Furthermore,TA uniformly dispersed in the polymer matrix provides good antibacterial and anti-diatom properties,as well as strong adhesion to the substrate(~2.2 MPa).Laboratory bioassays against marine bacteria adhesion(~96%,~95%and~93%reduction for ***.,***,and ***,respectively)and diatom attachment(~84%reduction)demonstrated an outstanding antifouling property of the PDMSP(Ua-TUa)-*** work provides a promising pathway towards the development of high-performance silicone-based coatings for marine anti-biofouling.

关键词： Poly(dimethylsiloxane) Poly(urea-thiourea) Self-healing Hydrogen bonding Marine antifouling Tannic acid

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A New Species of the Asian Toad Genus Megophrys sensu lato(Amphibia: Anura: Megophryidae) from Guizhou Province, China

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Asian Herpetological Research 2018年第4期9卷 224-239页

作者： Shize LI ning XU jing liu Jianping JIANG Gang WEI Bin WANG Department of Food Science and Engineering Maotai University CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology (CIB) Chinese Academy of Sciences (CAS) Biodiversity Conservation Key Laboratory Guiyang College

We describe a new species of the genus Megophrys sensu lato from Guizhou Province, China. Molecular phylogenetic analyses based on mitochondrial DNA and nuclear DNA sequences all strongly supported the new species as an independent lineage in Megophrys(Panophrys) clade. The new species is distinguished from its congeners by a combination of the following morphological characteristics:(1) small body size with SVL < 38.8 mm in male and SVL < 42.3 mm in female;(2) vomerine teeth absent;(3) tongue not notched behind;(4) a small horn-like tubercle at the edge of each upper eyelid;(5) tympanum distinctly visible, rounded;(6) two metacarpal tubercles in hand;(7) relative finger lengths: II < I < V < III;(8) toes with rudimentary webbing at bases;(9) heels overlapping when thighs are positioned at right angles to the body;(10) tibiotarsal articulation reaching the level between tympanum to eye when leg stretched forward;(11) an internal single subgular vocal sac in male;(12) in breeding male, the nuptial pads with black nuptial spines on the dorsal bases of the first and second fingers.

关键词： Megophrys sensu lato new species taxonomy phylogenetic analysis Guizhou Province China

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Characterization of the chemical constituents of Jie-Geng-Tang and the metabolites in the serums and lungs of mice after oral administration by LC-Q-TOF-MS

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Chinese Journal of Natural Medicines 2021年第4期19卷 284-294页

作者： liu Yin-ning HU Meng-Ting QIAN jing WANG Yi WANG Shu-Fang College of Pharmaceutical Sciences Zhejiang UniversityHangzhou 310058China Zhoushan Hospital of Zhejiang Province Zhoushan 316100China

Jie-Geng-Tang(JGT),a traditional formula,is employed in the treatment of sore throat and cough and comprises Platycodonis Radix and Glycyrrhizae Radix et Rhizoma in the ratio 1:*** previous study demonstrated that JGT protected mice from ***-induced acute lung injury(ALI).Five constituents of JGT showed antibacterial activities against *** in ***,the potential effective constituents of JGT in vivo were still *** this study,the chemical constituents of JGT were identified by liquid chromatography with quadrupole time-of-flight spectrometry(LC-Q-TOF-MS).A total of 96 constituents were identified or assumed,including seven organic acids,45 flavonoids,36 triterpene saponins,and eight compounds of other *** structures of 31 of the constituents were confirmed by comparing them with corresponding authentic ***,15 prototypes and 49 metabolites were deduced in the serums of mice,24 prototypes and 47 metabolites were deduced in the lungs of mice after the oral administration of *** types of constituents,namely organic acids,flavonoids,and triterpene saponins,could be absorbed into the ***,flavonoids and triterpene saponins were more likely distributed in the lung than in the *** the best of our knowledge,this is the first report on the systematic metabolites profile of JGT in *** results reported were beneficial to the elucidation of the effective material basis of JGT.

关键词： Jie-Geng-Tang LC-Q-TOF-MS Constituents Metabolite Serum Lung

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现象学视域下农村集体经济的本质再诠释

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西北农林科技大学学报（社会科学版） 2025年第1期25卷 60-68页

作者：李林峰刘启明饶静中国农业大学人文与发展学院北京100083 中共江西省委党校江西经济社会发展战略研究所南昌330108

鉴于当前政策、理论和实践领域对农村集体经济本质缺乏共识,本研究采用胡塞尔现象学的方法论,特别是一般现象学还原、本质还原和先验还原等技术,系统地审视了“农村集体经济应该是什么”这一核心议题。通过全面梳理当前对农村集体经济... 详细信息

鉴于当前政策、理论和实践领域对农村集体经济本质缺乏共识,本研究采用胡塞尔现象学的方法论,特别是一般现象学还原、本质还原和先验还原等技术,系统地审视了“农村集体经济应该是什么”这一核心议题。通过全面梳理当前对农村集体经济的多维认知,从而为其本质探索提供更为宽广的视角。在搁置既有认识的基础上,采用更加开放的态度识别出土地集体所有制是农村集体经济的共相,这一发现为理解其本质提供了关键线索。进一步从源初意向性与结构性剖析农村集体经济,揭示其本质在于注重公正,并凸显了其深厚的社会性和伦理性。这种本体论式反思既验证了马克思主义理论关于集体所有制经济的科学性及其生命力,更展示了中国农村集体经济独有的文化烙印。同时,跨学科的研究方法或为理解农村集体经济提供了新的视角,为推动其持续健康发展提供有益的思考。

关键词：农村集体经济现象学本质

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Beyond Performance of Learning Control Subject to Uncertainties and Noise: A Frequency-Domain Approach Applied to Wafer Stages

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 198-214页

作者： Fazhi Song ning Cui Shuaiqi Chen Kai Zhang Yang liu Xinkai Chen Jiubin Tan IEEE the Center of Ultra-precision Optoelectronic Instrument Engineering Harbin Institute of Technology the Key Laboratory of Ultra-Precision Intelligent Instrumentation Ministry of Industry and Information Technology the State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of Technology the Center of Ultraprecision Optoelectronic Instrument Engineering Harbin Institute of Technology the Key Laboratory of UltraPrecision Intelligent Instrumentation Ministry of Industry and Information Technology the Department of Electronic and Information Systems Shibaura Institute of Technology

The increasingly stringent performance requirement in integrated circuit manufacturing, characterized by smaller feature sizes and higher productivity, necessitates the wafer stage executing a extreme motion with the accuracy in terms of nanometers. This demanding requirement witnesses a widespread application of iterative learning control(ILC), given the repetitive nature of wafer scanning. ILC enables substantial performance improvement by using past measurement data in combination with the system model knowledge. However, challenges arise in cases where the data is contaminated by the stochastic noise, or when the system model exhibits significant uncertainties, constraining the achievable performance. In response to this issue, an extended state observer(ESO) based adaptive ILC approach is proposed in the frequency *** being model-based, it utilizes only a rough system model and then compensates for the resulting model uncertainties using an ESO, thereby achieving high robustness against uncertainties with minimal modeling effort. Additionally, an adaptive learning law is developed to mitigate the limited performance in the presence of stochastic noise, yielding high convergence accuracy yet without compromising convergence speed. Simulation and experimental comparisons with existing model-based and data-driven inversion-based ILC validate the effectiveness as well as the superiority of the proposed method.

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Fe-Si-Al高级氧化催化剂非均相Fenton处理造纸废水

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陕西科技大学学报 2025年第1期43卷 8-14,45页

作者：刘育星罗清张安龙段超宗晓宁井天昊刘雨恺王旭陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心陕西西安710021 陕西科技大学环境科学与工程学院陕西西安710021

造纸废水中的污染物种类繁多,COD_(Cr)排放量较大.目前,常规均相Fenton工艺在造纸废水深度处理中得到了广泛应用,然而该工艺存在硫酸亚铁用量较高和污泥产量较大的问题.本文将常规Fenton污泥为主要原料制取的Fe-Si-Al高级氧化催化剂应... 详细信息

造纸废水中的污染物种类繁多,COD_(Cr)排放量较大.目前,常规均相Fenton工艺在造纸废水深度处理中得到了广泛应用,然而该工艺存在硫酸亚铁用量较高和污泥产量较大的问题.本文将常规Fenton污泥为主要原料制取的Fe-Si-Al高级氧化催化剂应用于非均相Fenton处理造纸废水,以COD_(Cr)的去除率和污泥产量作为评价指标,并利用SEM、XRD、FT-IR等现代仪器手段,研究其应用工艺及反应机理.结果表明,当反应体系初始pH值为3、催化剂投加量10 g/L、m(COD_(Cr))∶m(H_(2)O_(2))=1∶1、反应时间90 min时,COD_(Cr)的去除率可达73.6%,污泥产量较常规Fenton降低了91.8%.催化剂中的铁铝尖晶石(FeAl_(2)O_(4))和铁橄榄石(Fe_(2)SiO_(4))为体系提供Fe^(2+).催化剂经过10次循环利用,COD_(Cr)去除率仍保持在70%左右,表明其具有良好的循环利用性能.非均相Fenton降解有机物的种类较均相Fenton更多,可破坏苯环结构.

关键词： Fenton污泥造纸废水非均相Fenton Fe-Si-Al高级氧化催化剂

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Cyber-physical-social-thinking space based science and technology framework for the Internet of Things

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Science China(Information Sciences) 2015年第3期58卷 17-35页

作者： ning HuanSheng liu Hong School of Computer and Communication Engineering University of Science and Technology Beijing Engineering Laboratory RUN Technologies Co. Ltd. Beijing

The Internet of Things(Io T)as an emerging network paradigm is bringing the next scientific and technological revolution for ubiquitous things’interactions in cyber-physical-social *** Io T influences the current science and technology system by enabling its relatively stable interrelations for an inevitable architecture *** this paper,we aim to explore an updated science and technology framework for the Io ***,a novel cyber-physical-social-thinking(CPST)space is established by involving an attractive concept of the Internet of Thinking(Io Tk),and a science and technology framework is accordingly proposed referring to both scientific aspect(i.e.,cyber-physical,social,and noetic sciences)and technological aspect(i.e.,fundamental,physical,cyber,and social technologies).According to the perspective of the traditional Chinese culture,we explain the established science and technology framework,in which the"Five Elements"(i.e.,wood,fire,earth,metal,and water)have common properties with the restructured cyber-physical science in the Io ***,we introduce a scenario of smart city to identify the technological aspect in the Io T,and discuss the key enabling technologies,including resource management,energy management,data management,session management,security and privacy,loop control,space-time consistency,nanotechnology,and quantum *** turns out that the established science and technology framework will launch an innovation for academia and industry communities.

关键词： Internet of Things(Io T) cyber-physical-social-thinking science technology discipline

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Influence of baffle position on liquid sloshing during braking and turning of a tank truck

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第5期11卷 317-324页

作者： ning KANG Kui liu School of Transportation Science and Engineering University of A eronautics and Asttvnautics Beijing 100191 China

The influence of baffle position on liquid sloshing during the braking and turning of a tank truck was studied using a volume of fluid (VOF) model. The forces,their positions and weight distribution during braking and the forces and rolling moment during turning were calculated. The reliability of the calculation method was validated by comparisons with experimental results. The results showed that during braking,liquid splashes in the tank and the maximum forces and G (the ratio of weight acting on the front axle to the rear axle) are large when A (the ratio of the arch area above the baffle to the area of cross section)≤0.1. When A≥0.2,as the position of the baffle is lowered,the maximum of Fx (the force in direction x) first decreases then increases,and the maximum of Fy (the force in direction y) and G increase. During turning,liquid splashes in the tank and the maximum forces and M (the rolling moment) are large when D (the ratio of the arch area above the baffle to the area of cross section)≤0.2. When D≥0.3,as the position of the baffle is lowered,the maximums of Fy,Fz (the force in direction z) and M increase.

关键词： Tank truck Volume of fluid (VOF) method Liquid sloshing Two phase flow Baffle

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An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells

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Nano-Micro Letters 2025年第2期17卷 372-375页

作者： Shuai Xu Youdi Zhang Yanna Sun Pei Cheng Zhaoyang Yao ning Li Long Ye Lijian Zuo Ke Gao Key Laboratory of Advanced Green Functional Materials College of ChemistryChangchun Normal UniversityChangchun 130032People’s Republic of China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237People’s Republic of China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China State Key Laboratory and Institute of Elemento‑Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071People’s Republic of China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Tianjin Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300350People’s Republic of China State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Recently published in Joule,Feng liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer *** optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture *** approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs.

关键词： Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management

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