检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Wang, Fan Zheng, Yueying Wei, Xinggang Lan, Dawei Zhu, Jintao Chen, Yingjie Wo, Ziquan Wu, Tao New Materials Institute University of Nottingham Ningbo315100 China Department of Chemical and Environmental Engineering University of Nottingham Ningbo China Ningbo315100 China Key Laboratory of Carbonaceous Wastes Processing and Process Intensification of Zhejiang Province Ningbo315100 China SAILARK digital technology Co. Ltd Shanghai200000 China Zhejiang - Canada Joint Laboratory on Green Chemicals and Energy China Department of Material Science and Engineering Guangdong Technion-Israel Institute of Technology Shantou City515000 China

In this study, a highly selective adsorption of Cu (II) is achieved by a designed composite material with an internal synergetic effect between multiple components. The Fe3O4/MnO2/ZIF-67 composite was synthesized by a controlled approach to form MnO2 with a desired (3 1 0) facet to achieve high adsorption selectivity, capacity, and rate. Experimental results showed that the composite exhibits excellent selectivity in adsorbing Cu (II) with a partition coefficient K of Cu (II) 2.2-5.3 times that of other coexistence ions. The composite also demonstrated an excellent adsorption capacity of 1261.0 mg g-1 and a fast adsorption rate of 840.7 mg g-1 h-1 at 298 K. Moreover, its magnetic property enables it easily separated from wastewater, which increases its potential for commercial application. The synergetic effect mechanism was analyzed by characterizations and DFT calculations, and a detailed design demonstration of the above process was carried out. © 2023, The Authors. All rights reserved.

关键词： Adsorption

Mass-Transfer-Enhanced Hydrophobic Bi Microsheets for Highly Efficient Electroreduction of Co2 to Pure Formate in a Wide Potential Window

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SSRN 2022年

作者： Zhang, Yong Zhang, Rui Chen, FeiFei Zhang, FeiFei Liu, Yingda Hao, Xiaoya Jin, Haokun Zhang, Xinghua Lu, Zunming Dong, Hong Lu, Feng Wang, Weihua Liu, Hui Liu, Hui Cheng, Yahui Department of Electronic Science and Engineering Tianjin Key Laboratory of Process Control and Green Technology for Pharmaceutical Industry Nankai University Tianjin300350 China School of Material Science and Engineering Hebei University of Technology Tianjin300130 China Research Group of Quantum-Dot Materials & Devices Institute of New-Energy Materials Tianjin University Tianjin300350 China

The industrial application of electrochemical CO2 reduction reaction is challenged by the limited mass transfer and the mixing of products with traditional electrolytes. Here, we proposed an in-situ electroreduction strategy to construct hydrophobic Bi microsheets with (012) plane orientation and abundant grain boundaries to solve these problems and maintain high intrinsic activity. The large distance between microsheets and the stable micro-sized hydrophobic structure can trap more air and form smaller solid-liquid interface to stably improve CO2 mass transfer. The obtained Bi microsheets exhibited high activity and selectivity in a wide potential window. In an H-type cell, the selectivity of formate exceeds 90% over a potential range of -0.8 V to -1.3 V vs. RHE. The pure formate solution was produced using a CO2 reduction cell with solid-state electrolyte to simplify product separation, and 0.13 M pure formate solution was continuously and stably produced for 110 h at 160 mAcm-2 . © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

Volatolomics in healthcare and its advanced detection technology

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Nano Research 2022年第9期15卷 8185-8213页

作者： Wenwen Hu Weiwei Wu Yingying Jian Hossam Haick Guangjian Zhang Yun Qian Miaomiao Yuan Mingshui Yao School of Aerospace Science and Technology Xidian UniversityXi’an 730107China Interdisciplinary Research Center of Smart Sensors School of Advanced Materials and NanotechnologyXidian UniversityXi’an 730107China Faculty of Chemical Engineering and Russell Berrie Nanotechnology Institute Technion-Israel Institute of TechnologyHaifa 3200002Israel Department of Thoracic Surgery The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061China Stomatology Hospital School of StomatologyZhejiang University School of MedicineClinical Research Center for Oral Diseases of Zhejiang Province Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhou 310006China The Eighth Affiliated Hospital Sun Yat-sen UniversityShenzhen 518033China State Key Laboratory of Multi-phase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 310006China Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced StudyKyoto UniversityKyoto 606-8501Japan

Various diseases increasingly challenge the health status and life quality of human *** emitted from patients has been considered as a potential family of markers,volatolomics,for diagnosis/*** are two fundamental issues of volatolomics in *** one hand,the solid relationship between the volatolome and specific diseases needs to be clarified and *** the other hand,effective methods should be explored for the precise detection of *** comprehensive review articles had been published in this ***,a timely and systematical summary and elaboration is still *** this review article,the research methodology of volatolomics in healthcare is critically considered and given out,at ***,the sets of volatolome according to specific diseases through different body sources and the analytical instruments for their identifications are systematically ***,the advanced electronic nose and photonic nose technologies for volatile organic compounds(VOCs)detection are well *** existed obstacles and future perspectives are deeply thought and *** article could give a good guidance to researchers in this interdisciplinary field,not only understanding the cutting-edge detection technologies for doctors(medicinal background),but also making reference to clarify the choice of aimed VOCs during the sensor research for chemists,materials scientists,electronics engineers,etc.

关键词： volatolomics electronic nose disease diagnosis sensor artificial olfaction volatile organic compounds

Ti-MOF Derived N-Doped TiO2 Nanostructure as Visible-light-driven Photocatalyst

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Chemical Research in Chinese Universities 2020年第3期36卷 447-452页

作者： HE Yilei ZHANG Xing WEI Yanze CHEN Xiaoyu WANG Zumin YU Ranbo Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversiw of Science and Technology BeijingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Advanced Material Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002P.R.China

Nanostructured N-doped TiO2 photocatalyst has been prepared via a new approach from Ti-based MOF[NH2-MIL-125(Ti)]*** success of N doping enhances light absorption and narrows the ***,the as-prepared nanostructure is constructed with tiny nanoparticles and resembles a pie-like morphology inherited from the MOF,which accelerates electron ***,as a photocatalyst for the degradation of methylene blue(MB)under visible light irradiation,the N-doped TiO2(N-TiO2)nanostructure shows higher photocatalytic activity with a reaction rate constant of 0.018min^-1 than that of the TiO2-P25 and TiO2 under the visible light.

关键词： TiO2 Mctal-organic framcwork Photo-degradaton N doped Visible-light photocatalysis

Nanostructured BiVO4 Derived from Bi-MOF for Enhanced Visible-light Photodegradation

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Chemical Research in Chinese Universities 2020年第1期36卷 120-126页

作者： CHEN Jianfei CHEN Xiaoyu ZHANG Xing YUAN Yao BI Ruyi YOU Feifei WANG Zumin YU Ranbo Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Advanced Material Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002P.R.China

BiVO4,a promising visible-light responding photocatalyst,has aroused extensive research interest because of inexpensiveness and excellent chemical ***,its main drawback is the poor photoinduced charge-transfer *** nanostructures is an effective way to tackle this ***,we put forward a new method to prepare nanostructured BiVO4 from Bi-based metal-organic frameworks[Bi-MOF(CAU-17)]*** as-prepared material has a rod-like morphology inherited from the Bi-MOF sacrificial template and consists of small nanoparticle as building *** with its counterparts prepared by conventional methods,MOF-derived nanostructured BiVO4 shows better light absorption ability,narrower bandgap,and improved electrical conductivity as well as reduced ***,BiVO4 nanostructure demonstrates high photocatalytic activity under visible light towards the degradation of methylene *** blue can be degraded up to 90%within 30 min with a reaction rate constant of 0.058 ***,the cycling stability of the catalyst is excellent to withstand unchanged degradation efficiency for at least 5 cycles.

关键词： BiVO4 Nanostructure Metal-organic framework Ternary metal oxide Photocatalysis

Experimental Investigation of Circulating Fluidized Bed Combustion of Dry Powders of Coal Slime

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SSRN 2022年

作者： Liang, Bin Bai, Haolong Tan, Bo Fu, Liangliang Bai, Dingrong Shandong Energy Group Co. Ltd. Shandong Jinan250014 China Key Laboratory on Resources Chemicals and Material of Ministry of Education Shenyang University of Chemical Technology Shenyang110142 China Institute of Process Engineering Chinese Academy of Sciences Beijing100084 China Beijing Key Laboratory of Green Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing100084 China

Effective combustion of coal slime in circulating fluidized bed (CFB) boilers is essential for the sustainable development of clean coal technology. To overcome issues related to burning wet coal slime in CFBs, we propose to dry coal slime in a low-temperature drying system and burn the dried fine powders in a CFB with a highly efficient *** assess the feasibility, a series of experiments are conducted in a 4MWth pilot-scale CFB combustion test facility. The results demonstrate that the dried slime particles, which have a particle size distribution similar to that of circulating ash particles, can be burned stably, efficiently, and cleanly. The combustion of fuels with size distributions similar to that of circulating ash particles increases solids circulation rates, betters solids concentration distribution, enhances heat transfer combustion, and improves operation and SO2 and NOx controls. Therefore, the study presents a potential opportunity to advance CFB combustion technology. © 2022, The Authors. All rights reserved.

关键词： Particle size

Degradation of Bio-Based Film Plastics in Soil Under Natural Conditions

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SSRN 2022年

作者： Slezak, Radoslaw Krzystek, Liliana Puchalski, Michal Krucińska, Izabella Sitarski, Adam Department of Bioprocess Engineering Faculty of Process and Environmental Engineering Lodz University of Technology Wolczanska 213 Lodz90-924 Poland Institute of Material Science of Textiles and Polymer Composites Faculty of Materials Technology and Textile Design Lodz University of Technology Zeromskiego 116 Lodz90-924 Poland Kutno Sugar Beet Breeding Ltd. Straszkow 12 Klodawa62-650 Poland

The degradation of bio-based plastic materials in field soil under natural conditions was investigated in this study. Three bio-based plastics materials, which contained polylactide (PLA) with polybutylene adipate terephthalate and additives (PLA_1), PLA-based polyester blend with mineral filler (PLA_2), and polybutylene succinate with mineral filler (PBS_1) in the form of the film, were subjected to soil burial biodegradation processes. The experiments were carried out in a climate with an average annual temperature of 9.4°C, in winter and summer periods for one year. The degradation of the materials was evaluated by macro- and microscopic observations, weight loss, thermogravimetric analysis, and tensile test. Macroscopic observation indicated that changes in the color of film surface were visible for samples PBS_1 after 12 months of degradation. Using microscopic inspection the erosion of surface samples PLA_1 and PBS_1 after 12 months was observed. Mass loss of samples PLA_1 and PLA_2 after one year of degradation were below 0.6%. Moreover, for PBS_1 sample, mass loss was equal to 4.3%. Based on the obtained results of the mass loss, a description of the degradation kinetics was proposed, showing the changes in the thickness of the tested polymer over time. The thermal stability of the samples PLA_1 and PLA_2 decreased during the degradation process by 16.1 and 2.6°C, respectively, and for PBS_1 increased by 1.7°C. Tensile strength at break after 12 months of degradation decreased for sample PLA_1 and PLA_2 by 27.3 and 5.8%, respectively, and increased for sample PBS_1 by 28.2% compare to unexposed sample. © 2022, The Authors. All rights reserved.

关键词： Degradation

Plasma-electrochemical synthesis of europium doped cerium oxide nanoparticles

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Frontiers of Chemical Science and engineering 2019年第3期13卷 501-510页

作者： Liangliang Lin Xintong Ma Sirui Li Marly Wouters Volker Hessel School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China Micro Flow Chemistry and Process Technology Chemical Engineering and Chemistry DepartmentEindhoven University of Technology5600 MB Eindhoventhe Netherlands School of Chemical Engineering The University of AdelaideSouth Australia 5005Australia

In the present study,a plasma-electrochemical method was demonstrated for the synthesis of europium doped ceria ***(NO3)3· 6H2O and Eu(NO3)3·5H2O were used as the starting materials and being dissolved in the distilled water as the electrolyte *** plasma-liquid interaction process was in-situ investigated by an optical emission spectroscopy,and the obtained products were characterized by complementary analytical *** showed that crystalline cubic CeO2:Eu3+ nanoparticles were successfully obtained,with a particle size in the range from 30 to 60 *** crystal structure didn't change during the calcination at a temperature from 400℃ to 1000℃,with the average erystallite size being estimated to be 52 nm at 1000℃.Eu3+ ions were shown to be effectively and uniformly doped into the CeO2 *** a result,the obtained nanophosphors emit apparent red color under the UV irradiation,which can be easily observed by naked *** photoluminescence spectrum further proves the downshift behavior of the obtained products,where characteristic 5Do → 7F1,2,3 transitions of Eu3+ ions had been *** to the simple,flexible and environmental friendly process,this plasma-electrochemical method should have great potential for the synthesis of a series of nanophosphors,especially for bio-application purpose.

关键词： plasma-electrochemical method europium doped ceria rare earth nanoparticles photoluminescence

Rejuvenating Mullite-Zirconia Composites from Investment-Casting Shell Waste and Investigation of Their Physicochemical and Theoretical Radiation Shielding Properties

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SSRN 2023年

作者： Avcıoğlu, Celal Avcıoğlu, Suna Bekheet, Maged F. Artır, Recep Technische Universität Berlin Faculty III Process Sciences Institute of Material Science and Technology Fachgebiet Keramische Werkstoffe Advanced Ceramic Materials Straße des 17. Juni 135 Berlin10623 Germany Usak University Scientific Research Projects Coordinatorship Usak64000 Turkey Yıldız Technical University Faculty of Chemistry and Metallurgy Department of Metallurgical and Materials Engineering Davutpaşa Campus Istanbul34210 Turkey Marmara University Faculty of Engineering Department of Metallurgical and Materials Engineering Istanbul34722 Turkey Department of Analysis and Evaluation

The growing global production of high-precision metal products via investment casting increases the amount of ceramic shell wastes (CW) being produced. The disposal of CW causes significant environmental issues, including water and soil pollution. Although the exact chemical composition of the CW varies by the production facility, it is mainly composed of different amounts of mullite, zircon, and silica. This article assesses the feasibility of CW as a raw material in producing high-performance mullite-zirconia ceramics. In this regard, we prepared a mixture containing CW, Al2O3, and MgO and then sintered at 1500, 1550, and 1600 °C with 4h soaking time. Alumina is added to consume the free silica from CW to yield mullite, and MgO is added to obtain proper microstructure development as well as to promote zircon dissociation. The results showed that increasing sintering temperature promotes densification and enhances mechanical properties. The mullite-zirconia composite sintered at 1600 °C presented promising results, with considerable flexural and compressive strength values of 190.18 and 227.93 MPa, respectively, which are comparable to or even better than the mullite ceramics prepared from most other waste materials. Furthermore, the total atomic cross-sections, mass attenuation coefficients, linear attenuation coefficients, mean free paths, half-value layers, energy absorption buildup factors, exposure buildup factors, effective atomic numbers, effective electron densities computed using the EpiXS software, and the neutron removal cross-sections investigated using the PhyX/PSD software. Then the results were compared with the other commonly used radiation shielding materials. © 2023, The Authors. All rights reserved.

关键词： Aluminum oxide

Tailoring Advanced N-Defective and S-Doped g-C3N4 for Photocatalytic H2 Evolution

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Small 2023年第28期19卷

作者： Wang, Haitao Jiang, Jizhou Yu, Lianglang Peng, Jiahe Song, Zhou Xiong, Zhiguo Li, Neng Xiang, Kun Zou, Jing Hsu, Jyh-Ping Zhai, Tianyou School of Chemistry and Environmental Engineering School of Environmental Ecology and Biological Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Novel Catalytic Materials of Hubei Engineering Research Center Wuhan Institute of Technology Wuhan430205 China State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China Key Laboratory of Rare Mineral Ministry of Natural Resources Hubei Key Laboratory of Resources and Eco-environmental Geology Geological Experimental Testing Center of Hubei Province Wuhan430034 China Department of Chemical Engineering "National Taiwan University" Taipei10617 China State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

Although challenges remain, synergistic adjusting various microstructures and photo/electrochemical parameters of graphitic carbon nitride (g-C3N4) in photocatalytic hydrogen evolution reaction (HER) are the keys to alleviating the energy crisis and environmental pollution. In this work, a novel nitrogen-defective and sulfur-doped g-C3N4 (S-g-C3N4-D) is designed elaborately. Subsequent physical and chemical characterization proved that the developed S-g-C3N4-D not only displays well-defined 2D lamellar morphology with a large porosity and a high specific surface area but also has an efficient light utilization and carriers-separation and transfer. Moreover, the calculated optimal Gibbs free energy of adsorbed hydrogen (ΔGH*) for S-g-C3N4-D at the S active sites is close to zero (≈0.24 eV) on the basis of first-principle density functional theory (DFT). Accordingly, the developed S-g-C3N4-D catalyst shows a high H2 evolution rate of 5651.5 µmol g−1 h−1. Both DFT calculations and experimental results reveal that a memorable defective g-C3N4/S-doped g-C3N4 step-scheme heterojunction is constructed between S-doped domains and N-defective domains in the structural configuration of S-g-C3N4-D. This work exhibits a significant guidance for the design and fabrication of high-efficiency photocatalysts. © 2023 Wiley-VCH GmbH.

关键词： Density functional theory