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Remote open-path laser-induced breakdown spectroscopy for the analysis of manganese in steel samples at high temperature

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Plasma Science and Technology 2019年第3期21卷 52-59页

作者： Minchao CUI Yoshihiro DEGUCHI Zhenzhen WANG Seiya TANAKA Min-Gyu JEON Yuki FUJITA Shengdun ZHAO School of Mechanical Engineering Xi'an Jiaotong University Graduate School of Advanced Technology and Science University of Tokushima State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Division of Mechanical Engineering Korea Maritime and Ocean University School of Mechanical Engineering Xi’an Jiaotong University

A remote open-path laser-induced breakdown spectroscopy(LIBS) system was designed and studied in the present work for the purpose of combining the LIBS technique with the steel production line. In this system, the relatively simple configuration and optics were employed to measure the steel samples at a remote distance and a hot sample temperature. The system has obtained a robustness for the deviation of the sample position because of the open-path and alloptical structure. The measurement was carried out at different sample temperatures by placing the samples in a muffle furnace with a window in the front door. The results show that the intensity of the spectral lines increased as the sample temperature increased. The influence of the sample temperature on the quantitative analysis of manganese in the steel samples was investigated by measuring ten standard steel samples at different temperatures. Three samples were selected as the test sample for the simulation measurement. The results show that, at the sample temperature of 500 ℃, the average relative error of prediction is 3.1% and the average relative standard deviation is 7.7%, respectively.

关键词： remote open-path LIBS steel manganese sample temperature quantitative analysis

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Robust DNA-Bridged Memristor for Textile Chips

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Angewandte Chemie 2020年第31期132卷 12862-12868页

作者： Xu X. Zhou X. Wang T. Shi X. Liu Y. Zuo Y. Xu L. Wang M. Hu X. Yang X. Chen J. Chen L. Chen P. Peng H. State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced Materials Fudan University Shanghai 200438 China State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai 200433 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiao Tong University Shannxi 710049 China State Key Laboratory of Surface Physics Fudan University Shanghai 200438 China Department of Materials Science Fudan University Shanghai 200438 China

Electronic textiles may revolutionize many fields, such as communication, health care and artificial intelligence. To date, unfortunately, computing with them is not yet possible. Memristors are compatible with the interwoven structure and manufacturing process in textiles because of its two-terminal crossbar configuration. However, it remains a challenge to realize textile memristors owing to the difficulties in designing advanced memristive materials and achieving high-quality active layers on fiber electrodes. Herein we report a robust textile memristor based on an electrophoretic-deposited active layer of deoxyribonucleic acid (DNA) on fiber electrodes. The unique architecture and orientation of DNA molecules with the incorporation of Ag nanoparticles offer the best-in-class performances, e.g., both ultra-low operation voltage of 0.3 V and power consumption of 100 pW and high switching speed of 20 ns. Fundamental logic calculations such as implication and NAND are demonstrated as functions of textile chips, and it has been thus integrated with power-supplying and light emitting modules to demonstrate an all-fabric information processing system. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

关键词： DNA fiber electronics logic-in-memory computing memristors nanoparticles

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Performance of different flocculants for harvesting Chlorella vulgaris by dissolved air flotation and sedimentation

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Bioresource Technology 2025年 433卷 132743页

作者： Wei, X. Rao, N.R.H. Tyagi, S. Thielemans, W. Cao, W. Guo, L.J. Muylaert, K. State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi Xi'an710049 China Laboratory of Aquatic Biology KU Leuven Campus Kulak Kortrijk Kortrijk8500 Belgium Sustainable Materials Laboratory Department of Chemical Engineering KU Leuven Campus Kulak Kortrijk Kortrijk8500 Belgium

This study systematically evaluated the performance of dissolved air flotation and sedimentation for harvesting Chlorella vulgaris using eight different flocculants. Significant variation was observed in both the maximum harvesting efficiency and the minimum effective flocculant dose across different flocculant-process combinations. Among the tested flocculants, pyridinium modified cellulose nanocrystals achieved the highest harvesting efficiency of 99 % in both dissolved air flotation and sedimentation, while chitosan required the lowest minimum flocculant dose (∼2 mg·g−1) to induce flocculation. The impact of floc size formed during the flocculation step on harvesting performance was also investigated, revealing that large flocs significantly favored sedimentation-based microalgae harvesting. A preliminary cost analysis highlighted the importance of integrating economic considerations into the selection of both flocculant and harvesting method. The findings suggest that optimal flocculant and process selection should be based not only on harvesting efficiency but also on cost-effectiveness for microalgal biomass recovery. © 2025 Elsevier Ltd

关键词： Cost benefit analysis

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Full-core normal and preliminary transient analysis for SiC-based rod designs 14

Full-core normal and preliminary transient analysis for SiC-...

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14th International Nuclear Fuel Cycle Conference, GLOBAL 2019 and Light Water Reactor Fuel Performance Conference, TOP FUEL 2019

作者： He, Yanan Deng, Yangbin Wu, Yingwei Shirvan, Koroush Department of Nuclear Science and Engineering MIT CambridgeMA02139 United States State Key Laboratory of Multiphase Flow in Power Engineering Department of Nuclear Science and Technology Xi'an Jiaotong University Xi'an City710049 China College of Physics and Energy Shenzhen University Shenzhen518060 China

When introducing a new fuel concept in traditional light water reactors (LWRs), analyzing its performance under a variety of power histories while attempting to simulate its stress state as realistic as possible is desired. By having access to such capability, the fuel developer can assess the safety characteristics of the new fuel concept and optimize its design performance. SiC/SiC Ceramic Matrix Composite (CMC) with chemically vapor deposited (CVD) SiC, is an accident tolerant fuel (ATF) concept owing to its high mechanical strength and remarkably enhanced oxidation-resistance. The modeling of SiC cladding requires capability to simulate multilayers and capture the nonlinear response of SiC material under neutron radiation. In addition, considering its probabilistic failure characteristics, efficient running fuel performance tools are required to assess its initial safety performance and optimize its design. In this work, we added a multi-layer deformation model in FRAPCON-4.0 and FRAPTRAN-2.0, with the primary motivation to analyze the performance of SiC cladding for UO2, annular UO2 and U3Si2 fuels from a full core point-of-view. We then performed reactivity-initiated accident (RIA) and loss-of-coolant accident (LOCA) for the limiting rod. During normal conditions, the failure risk of SiC cladding is mainly determined by pellet-cladding mechanical interaction (PCMI) and U3Si2 is a more promising fuel compared to UO2. While promising performance was simulated during LOCA for all fuels, during RIA, U3Si2 performance was found to be likely more limiting compared to UO2. Results show that the full core simulation methods developed for this work are robust and computationally efficient and can be adopted for other ATF design analysis. Copyright © GLOBAL 2019 - International Nuclear Fuel Cycle Conference and TOP FUEL 2019 - Light Water Reactor Fuel Performance *** rights reserved.

关键词： Silicon carbide

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Strengthening Chlorobenzene Catalytic Degradation Rate and Selectivity Over Laxsr1-Xmno3±Δ by Anchoring Interfacial Oxygen Vacancy

SSRN

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SSRN 2022年

作者： Li, Lu Tao, Dan Zhao, Qi Fu, Shuangshuang Min, Xin Chen, Changwei Tian, Mingjiao Shi, Jianwen He, Chi State Key Laboratory of Electrical Insulation and Power Equipment Center of Nanomaterials for Renewable Energy School of Electrical Engineering Xi’an Jiaotong University Shaanxi Xi’an710049 China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi’an Jiaotong University Shaanxi Xi’an710049 China College of Geology and Environment Xi’an University of Science and Technology Shaanxi Xi’an710054 China Faculty of Electronic and Information Engineering Xi’an Jiaotong University Shaanxi Xi’an710049 China School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Shaanxi Xi’an710055 China School of Environmental Science and Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China

Surficial lattice oxygen in perovskite compounds is a common participant during chloroaromatic catalytic destruction. Herein, we proposed a facile oxygen vacancy construction strategy for preparing high active LaxSr1-xMnO3±δ (LSMO) via NaBH4 treatment. Results reveal that LSMO composites are not only reduced by NaBH4 under mild condition, but trigger a significant Sr segregation effect, which plays a key role in oxygen vacancy formation accounting to the electron donation from Sr to Mn acceptor and subsequent lattice oxygen activation. Moreover, the concentration of interfacial active oxygen species can be regulated by taming the La-Sr interaction with different Sr substitution proportions. The anchored oxygen vacancies (OVs) take advantage of electron capture or transfer and induce molecule oxygen into active oxygen species to react with chlorobenzene molecules, resulting in a preferential catalytic oxidation capacity. Amongst, reduced La0.5Sr0.5MnO3±δ catalyst displays superior chlorobenzene destruction efficiency with 90% of which converted as low as 236 °C, which also exhibited a stable performance in long-time operation. However, the OVs would be refilled by water H2O molecules resulting in a weaker water resistance for OVs anchored catalyst. In summary, the annihilation of OVs is the most important factor for catalyst deactivation. The research offers a new avenue to construct interfacial oxygen species in perovskite oxides during the chlorobenzene deep oxidation process. © 2022, The Authors. All rights reserved.

关键词： Catalytic oxidation

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Sustainable hydrogen production from coal tar residue via supercritical water gasification

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Journal of Cleaner Production 2025年 519卷

作者： Jingui Bai Yu Wang Shi Liu Libo Lu Wen Cao Ting Chen Yunan Chen Liejin Guo State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University No.28 Xianning West Road Xi'an 710049 China Ningxia Baoting New Materials Technology Co. Ltd. Yinchuan 751400 Ningxia China

Hazardous wastes such as coal tar residue (CTR) pose a serious hazard to the environment and human health. In the context of ‘carbon peak and carbon neutrality’, the conversion of wasted resources into energy to replace fossil fuels is in line with the requirements of future social development. Supercritical water (SCW) offers a promising approach for converting hazardous waste CTR into energy. This article combines supercritical water gasification (SCWG) technology with the efficient utilization of CTR for the first time, providing a scientific solution for reducing environmental pollution and preparing hydrogen. In this article, we systematically investigated the effects of temperature (540–700 °C), residence time (5–60 min), material concentration (3 wt%-11 wt%), and six different catalysts on CTR SCWG. Experimental results indicate that higher temperature, longer reaction time, and lower CTR concentration are beneficial for gasification. When the temperature, retention time, material concentration, and catalyst are set at 700 °C, 60 min, 3 wt%, and K 2 CO 3 respectively, most of the carbon in the CTR is converted into small molecular gases. The carbon gasification efficiency (CE) reaches 94.44 %, while the H 2 yield attains a value of 67.56 mol kg −1 . Finally, based on the analysis results of gas, liquid and solid products, the SCWG mechanism of CTR is summarized.

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Electrochemical evolution of a metal oxyhydroxide surface on two-dimensional layered metal phosphorus trisulfides enables the oxidation of amine to nitrile

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Carbon Energy 2025年第03期 138-152页

作者： Binglan Wu Karim Harrath Marshet Getaye Sendeku Tofik Ahmed Shifa Yuxin Huang Jing Tai Fekadu Tsegaye Dajan Kassa Belay Ibrahim Xueying Zhan Zhenxing Wang Elisa Moretti Ying Yang Fengmei Wang Alberto Vomiero State Key Laboratory of Chemical Resource Engineering College of Chemistry Beijing University of Chemical Technology CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology (NCNST) Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University State Key Laboratory of Multiphase Flow in Power Engineering International Research Center for Renewable Energy Xi'an Jiaotong University Fundamental Science Center of Rare Earths Ganjiang Innovation Academy Chinese Academy of Science Ocean Hydrogen Energy R&D Center Research Institute of Tsinghua University in Shenzhen Department of Molecular Sciences and Nanosystems Ca' Foscari University of Venice Testing and Analysis Center Institute of Chemistry Chinese Academy of Sciences Department of Engineering Sciences and Mathematics Division of Materials Science Lule? University of Technology

Selective oxidation of amines to imines through electrocatalysis is an attractive and efficient way for the chemical industry to produce nitrile compounds,but it is limited by the difficulty of designing efficient catalysts and lack of understanding the mechanism of ***,we demonstrate a novel strategy by generation of oxyhydroxide layers on two-dimensional iron-doped layered nickel phosphorus trisulfides(Ni1-xFexPS3) during the oxidation of benzylamine（BA）.In-depth structural and surface chemical characterizations during the electrocatalytic process combined with theoretical calculations reveal that Ni（1-x）FexPS3undergoes surface reconstruction under alkaline conditions to form the metal oxyhydroxide/phosphorus trichalcogenide(NiFeOOH/Ni1-xFexPS3) ***,the generated heterointerface facilitates BA oxidation with a low onset potential of 1.39 V and Faradaic efficiency of 53% for benzonitrile（BN） *** calculations further indicate that the as-formed NiFeOOH/Ni1-xFexPS3heterostructure could offer optimum free energy for BA adsorption and BN desorption,resulting in promising BN synthesis.

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Prediction of the severe slugging period in gas-liquid two-phase pipeline-riser systems using an artificial neural network

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Energy 2025年 331卷

作者： Chang, Yingjie Xu, Qiang Huang, Bo Zhang, Xuemei Yu, Haiyang Chen, Hao Thévenin, Dominique Guo, Liejin Shaanxi Key Laboratory of New Transportation Energy and Automotive Energy Saving School of Energy and Electrical Engineering Chang'an University Xi'an710064 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China Laboratory of Fluid Dynamics and Technical Flows Otto-von-Guericke-Universität Magdeburg Magdeburg39106 Germany

Severe slugging flow (SS) is a very harmful flow regime found during oil and gas transportation. An accurate prediction of the SS period would help to obtain the needed conditions for regime transition models, which are essential when designing and operating an oil and gas field. However, previous empirical correlations are limited to specific flow and structural conditions, resulting in significant errors whenever these parameters deviate. Gas-liquid two-phase flow experiments in a pipeline-riser system were carried out and used as additional training data. The analysis of scatter matrix and correlation coefficient was used to determine the most relevant features impacting SS period. Then, a prediction model based on an artificial neural network (ANN) was established with one single output (the SS period) and seven input features, including five pipeline structural parameters and two flow parameters. The prediction errors coming with previous empirical models are much larger than those of our ANN model. While the relative errors of the empirical models range from −95 % to 3000 %, the ANN has a prediction error within a range of 25 % and a mean absolute error of only 11.3 %, showing a significant improvement over previous predictions. © 2025 Elsevier Ltd

关键词： Gas industry

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Atomically Dispersed Co Sites on BiOCl Nanosheets for Efficient CO 2 Photoreduction

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Green Energy & Environment 2025年

作者： Ting Peng Yiduo Wang Ke Wang Kaini Zhang Yiqing Wang Yufei Xu Qingqing Guan Guofu Wang Wenjie Zhang Binglan Wu Shaohua Shen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an 710049 China College of Chemical and Biological Engineering Zhejiang University Hangzhou 310058 China Institute of Zhejiang University-Quzhou Quzhou 324000 China

Efficient CO 2 photoreduction to produce fuel remains a great challenge, due to the fast recombination of photogenerated charge carriers and the lack of effective reactive sites in the developed photocatalysts. Herein, single Co atoms (Co SA ) were highly dispersed on hydrothermally synthesized BiOCl nanosheets (BOC) by a facile two-step electrostatic self-assembly and pyrolysis method. The obtained Co SA -BOC could be performed for efficient CO 2 photoreduction to stoichiometrically produce CO and O 2 at the ratio of 2:1, with the CO evolution rate reaching 45.93 μmol g –1 h –1 , ∼4 times that of the pristine BOC. This distinctly improved photocatalytic performance for Co SA -BOC should be benefited from the introduction of atomically dispersed Co-O 4 coordination structures, which could accelerate the migration of photogenerated charge carriers to surface by creating an impurity energy level in the forbidden band, and act as the reactive sites to deliver the photogenerated electrons to activate CO 2 molecules for CO production. This work provides a facile and reliable strategy to highly disperse single atoms on low-dimensional semiconductors for efficient CO 2 photoreduction to selectively produce CO.

关键词： photocatalysis CO 2 reduction BiOCl nanosheets single Co atoms

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Function-switchable metal/semiconductor junction enables efficient photocatalytic overall water splitting with selective water oxidation products

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Science Bulletin 2020年第16期65卷 1389-1395,M0004页

作者： Daixing Wei Yubo Tan Yiqing Wang Tingting Kong Shaohua Shen Samuel S.Maoc International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049China College of Chemistry and Chemical Engineering Xi'an Shiyou UniversityXi'an 710054China Department of Mechanical Engineering University of California at BerkeleyBerkeleyCA 94720USA

A novel metal/semiconductor photocatalyst,Cu nanoparticles(NPs)modified TiO2 hollow spheres(Cu/TiO2),was designed for efficient photocatalytic overall water splitting(POWS)under both ultraviolet(UV)and visible(Vis)*** Cu/TiO2 photocatalyst possesses excellent POWS performance under Vis light at the highest level among the reported TiO2-based ***,the metal/semiconductor junction formed between Cu and TiO2 enables controlled water-oxidation product selectivity(H2O2 or O2)via different reaction pathways regulated by irradiation *** UV light,the electrons excited in TiO2 are captured by Cu NPs through the Cu/TiO2 Schottky interface for H2 production,with the photoholes in TiO2 producing H2O2 through a two-electron process;whilst under Vis light,Cu NPs act as plasmon to inject hot electrons to TiO2 for H2 production,while O2 is produced by hot holes on Cu NPs via a four-electron *** rational design of function-switchable metal/semiconductor junction may be helpful to understand the mechanisms for POWS with desired gas/liquid water-oxidation products.

关键词： Photocatalysis Water splitting Product selectivity Reaction pathway Metal/semiconductor junction

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