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SSRN 2023年

作者： Cheng, Yu Mo, ZhenZhen Liu, Huiling Wang, Cheng Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials & Low-Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology Tianjin300384 China School of Environmental Science and Safety Engineering Tianjin University of Technology Tianjin300384 China

Selective reduction of biomass-derived platform compounds via catalytic transfer hydrogenation (CTH) is a cost-effective and environmentally-friendly approach for the conversion and utilization of biomass resources. Herein, we have developed a novel Cu, Zn-decorated N-doped porous carbon (Cu/Zn@NC) catalyst for the CTH of furfural (FF) to furfuryl alcohol (FAL), using a zeolitic imidazolate frameworks-derived strategy. The Cu/Zn@NC-600 catalyst shows the optimal catalytic activity and robust stability towards the CTH. When using isopropanol as the H-donor, the FF conversion reaches almost 100% and the FAL yield is as high as 96.78%. Combined with structure characterizations and control experiments, the high activity of Cu/Zn@NC-600 is speculated to mainly derive from the high dispersion of metal nanoparticles, and the synergetic effect between Lewis acid (Cu (0) and Cu (I)) and basic (pyridinic-N) sites. Additionally, in five cycle experiments, the Cu/Zn@NC-600 catalyst exhibits robust stability in the CTH reaction on FF. Overall, this work provides a simple method to obtain highly efficient and stable CTH catalysts, which is of great significance for the hydrogenation of biomass compounds. © 2023, The Authors. All rights reserved.

关键词： Furfural

Effects of Mo Content on the Microstructure and Mechanical Properties of Tinbzrmox High-Entropy Alloys

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SSRN 2022年

作者： Chen, Gengbiao Yan, Hongwei Wang, Zhe Wang, Kaiming Yves, Ngabonziza Irumva Tong, Yonggang College of Automotive and Mechanical Engineering Changsha University of Science and Technology Changsha410114 China Hunan Provincial Key Laboratory of Safety Design and Reliability Technology for Engineering vehicles Changsha University of Science and Technology Changsha Changsha410114 China School of Foreign Studies Changsha University of Science and Technology Changsha410114 China

The single-phase TiNbZrMox (x=0, 0.3, 0.5, 0.7, 1) high-entropy alloys (HEAs) were prepared by via arc melting. The relation between molybdenum, microstructure, mechanical properties and wear resistance was investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM), universal tensile tester, hardness tester, friction tester, and wear tester. The results showed that TiNbZrMox alloys were composed of a single BCC phase. With the increase of molybdenum, the grain size of the as-cast alloy decreased first and then increased, both the alloy strength and hardness were increased and compressive strain plasticity was decreased. TiNbZrMo0.5 exhibited has the best comprehensive performance with a yield strength of 1.0 GPa, compressive strength of 1.3 GPa, and hardness of 429 HV;compared with TiNbZrMo0, increased by 77.32%, 25.14%, and 70.24% respectively;and its specific wear rate decreased by 50%, while it’s compressive plasticity only decreased by 5%. © 2022, The Authors. All rights reserved.

关键词： Microstructure

Numerical Simulation to Optimize Passive Aeration Strategy for Semi-Aerobic Landfill

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SSRN 2023年

作者： Guo, Shuai Yu, Wenbo Zhao, Hongyang Lai, Changfei Bian, Shijie Jin, Pan Liang, Sha Yuan, Shushan Huang, Liang Wang, Songlin Duan, Huabo Wang, Feifei Yang, Jiakuan School of Environmental Science & Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China Hubei Provincial Engineering Laboratory of Solid Waste Treatment Disposal and Recycle Technology Hubei Wuhan430074 China Hubei Provincial Research Center of Water Quality Safety and Water Pollution Control Engineering Technology Hubei Wuhan430074 China

Passive aeration has been proven to be efficient for oxygen supply in landfill. The combination of passive aeration and semi-aerobic landfill offers a cost-effective and energy-efficient approach to solid waste (SW) treatment. However, determining the optimal strategy for this combination has remained unclear. This study aimed to investigate the strategy of passive aeration in a semi-aerobic landfill using numerical simulation methods. A model coupled hydrodynamic model and compartment model for degradation of SW was implemented. The accuracy was well validated by comparing measured and simulated results in a pilot-scale landfill. Compared with natural convection, passive aeration by funnel caps could increase air input by 20%. By simulating volumetric fraction distribution of CO2, CH4 and O2 in landfill, an orthogonal experiment including 4 factors was designed to identify that the diameter of tubes (DT), the spacing between tubes (ST) and the landfill depth (LD) have substantial impacts on aerobic zone ratio (AZR) of landfill. But the diameter of gas ports (DGP) has an indiscernible effect. The optimized factors were determined to be as follows: DT = 0.3 m, ST = 15.0 m, DGP = 0.05 m, and LD = 4.0 m, under which the semi-aerobic landfill could enhance SW degradation. Large diameter and spacing of tubes are favorable to improve the AZR at the top of the landfill, and the aerobic zone mainly exists near the ventilation tubes. These findings contribute to the development of more efficient and sustainable solid waste treatment strategies in semi-aerobic landfill. © 2023, The Authors. All rights reserved.

关键词： Computational fluid dynamics

全球城市热辐射方向性制图揭示了城市气候遥感的潜在偏差

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science Bulletin 2023年第16期68卷 1809-1818,M0004页

作者：杜惠琳占文凤刘紫涵 E.Scott Krayenhoff TC Chakraborty 赵磊姜璐董攀李龙黄帆王莎莎徐于月 Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology International Institute for Earth System ScienceNanjing UniversityNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China School of Environmental Sciences University of GuelphGuelph N1G 2W1Canada Atmospheric Sciences and Global Change Division Pacific Northwest National LaboratoryRichland 99352USA Department of Civil and Environmental Engineering University of Illinois at Urbana-ChampaignUrbana 61820USA School of Geography and Ocean Science Nanjing UniversityNanjing 210023China

城市热辐射方向性限制了遥感地表温度反演精度,阻碍了对全球城市气候(如城市地表能量通量估算和城市热环境评估)的准确理解.然而,全球不同气候背景城市热辐射方向性时空特征及其造成的城市地表能量通量和热岛强度遥感估算偏差仍不清楚,... 详细信息

城市热辐射方向性限制了遥感地表温度反演精度,阻碍了对全球城市气候(如城市地表能量通量估算和城市热环境评估)的准确理解.然而,全球不同气候背景城市热辐射方向性时空特征及其造成的城市地表能量通量和热岛强度遥感估算偏差仍不清楚,在全球尺度是否存在与城市热辐射方向性密切相关且易获取的地表和气候参量尚不明晰.本研究结合多角度卫星观测地表温度和遥感云平台,分析了全球5500多个城市的热辐射方向性特征,量化了其造成的全球城市地表能量通量和热岛强度遥感估算偏差,厘清了全球尺度城市热辐射方向性与关键地表和气候参量的关系.研究发现全球城市平均热辐射方向性强度在夏季白天下午高达5.4 K.在极端情况下,当地表温度观测天顶角位于±60°时,热辐射方向性使得全球城市地表显热通量和热岛强度分别低估45.4%和43.0%.研究进一步发现全球城市热辐射方向性与地表不透水面百分比和空气温度具有良好的统计关系,这为卫星遥感城市地表温度角度纠正提供了新思路.

关键词：热岛强度城市气候地表能量通量地表温度显热通量卫星观测空气温度卫星遥感

Heterogeneous Aggregation of Carbon and Silicon Nanoparticles with Benzo[A]Pyrene Modulates Their Impacts on the Pulmonary Surfactant Film

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SSRN 2023年

作者： Wang, Wei Luo, Zhen Liu, Xia Dai, Yanhui Hu, Guoqing Zhao, Jian Yue, Tongtao Institute of Coastal Environmental Pollution Control Key Laboratory of Marine Environment and Ecology Ministry of Education Ocean University of China Qingdao266100 China Department of Engineering Mechanics State of Laboratory of Fluid Power and Mechatronic Systems Zhejiang University Hangzhou310027 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao266237 China

Inhaled nanoparticles (NPs) can deposit in alveoli where they interact with the pulmonary surfactant (PS), potentially inducing toxicity. Although nano-bio interactions are influenced by the physicochemical properties of NPs, isolated NPs used in previous studies cannot accurately represent those found in atmosphere. Here we used molecular dynamics simulations to investigate the interplay between two types of NPs associated with benzo[a]pyrene (BaP) at the PS film. Silicon NPs (SiNPs), regardless of aggregation and adsorption, directly penetrated through the PS film with minimal disturbance. Meanwhile, BaPs adsorbed on SiNPs were rapidly solubilized by PS, increasing the BaP’s bioaccessibility in alveoli. Carbon NPs (CNPs) showed aggregation and adsorption-dependent effects on the PS film. Compared to isolated CNPs, which extracted PS to form biomolecular coronas, aggregated CNPs caused more pronounced PS disruption, especially around irregularly shaped edges. SiNPs in mixture exacerbated the CNP-induced PS perturbation by piercing PS film around the site of CNP interactions. BaPs adsorbed on CNPs were less solubilized and suppressed PS extraction, but aggravated biophysical inhibition and prompted film collapse under compression. These results suggest that for proper assessment of inhalation toxicity of airborne NPs, it is imperative to consider their heterogeneous aggregation and adsorption of pollutants under atmospheric conditions. © 2023, The Authors. All rights reserved.

关键词： Adsorption

Highly Efficient Separation of Glucose and Fructose by Pore Exclusion of Zirconium-Based Metal−Organic Frameworks Isomers

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SSRN 2023年

作者： Xin, Tong Chen, Mingxuan Liu, Zewei Luo, Ruiwen Xing, Qinglei Bai, Peng Lyu, Jiafei Guo, Xianghai School of Chemical Engineering and Technology Tianjin University Tianjin300350 China Tianjin University Tianjin300350 China Tianjin Key Laboratory for Marine Environmental Research and Service School of Marine Science and Technology Tianjin University Tianjin300072 China Key Laboratory of Ocean Observation Technology of Ministry of Natural Resources School of Marine Science and Technology Tianjin University Tianjin300072 China School of Environmental and Chemical Engineering Foshan University Foshan528225 China School of Chemistry and Chemical Engineering South China University of Technology Guangzhou510641 China

The past two decades have witnessed the potentials of metal-organic frameworks (MOFs) for the adsorptive separation of difficult mixtures due to their designable porosity and significant surface area. In this work, two Zr6-based metal-organic framework materials with different pore sizes, NU-906 and NU-1008, were synthesized and evaluated as adsorbents for fructose/glucose separation, which is very important for sustainable biomass utilization. The two materials were characterized and studied, including the kinetics, isotherms, and thermodynamics by batch adsorption experiments, which can be well described by pseudo-second-order kinetics and Langmuir model (NU-906), Freundlich model (NU-1008), and the adsorption mechanism is described in terms of pore exclusion. The experimental results showed that NU-906 exhibited record-breaking adsorption selectivity towards fructose, whose static separation coefficient was up to 13.7. The NU-906 material with expanded particle size was further studied as filling of the chromatographic column for dynamic adsorption, and the dynamic separation coefficient was about 4.0, which was much higher than the column separation coefficient (~2.5) used in the industry at present. In addition, three adsorption/regeneration experiments demonstrated its reusability. © 2023, The Authors. All rights reserved.

关键词： Adsorption

Research on Vector Road Data Matching Method Based on Deep Learning

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Journal of Applied Mathematics and Physics 2023年第1期11卷 303-315页

作者： Lin Zhao Yanru Liu Yuefeng Lu Ying Sun Jing Li Kaizhong Yao School of Civil and Architectural Engineering Shandong University of Technology Zibo China School of Geography Science Nanjing Normal University Nanjing China Hunan Provincial Key Laboratory of Geo-Information Engineering in Surveying Mapping and Remote Sensing Hunan University of Science and Technology Xiangtan China State Key Laboratory of Resources and Environmental Information System Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China

Most of the existing vector data matching methods use traditional feature geometry attribute features to match, however, many of the similarity indicators are not suitable for cross-scale data, resulting in less accuracy in identifying objects. In order to solve this problem effectively, a deep learning model for vector road data matching is proposed based on siamese neural network and VGG16 convolutional neural network, and matching experiments are carried out. Experimental results show that the proposed vector road data matching model can achieve an accuracy of more than 90% under certain data support and threshold conditions.

关键词： Deep Learning Vector Matching Similarity VGG16 Siamese Network

Deep-sea organisms research oriented by deep-sea technologies development

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science Bulletin 2022年第17期67卷 1802-1816页

作者： Jing-Chun Feng Jianzhen Liang Yanpeng Cai Si Zhang Jingchuan Xue Zhifeng Yang Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China School of Ecology Environmentaland ResourcesGuangdong University of TechnologyGuangzhou 510006China South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China

Deep-sea environment,characterized by high pressures,extremely high/low temperatures,limited photosynthesis-generated organic matter,darkness,and high levels of corrosion,is home to flourishing special ecosystems in the ***,we illustrate how the deep-sea equipment offers insights into the study of life in the deep sea based on the work in the past five *** first describe how organisms in the deep sea are studied,even though it is highly difficult to get access to such extreme *** then explain the role of deep-sea technologies in advancing research on the evolution of organisms in hydrothermal vents,cold seeps,seamounts,oceanic trenches,and whale falls from the following perspectives:biological diversity,mechanisms of environmental adaptation,biological evolution,and ecosystem ***,to better understand the function and service of deep-sea organisms,and further conserve the special creatures under anthropologic activity and climate change,we highlight the importance of innovative deep-sea technologies to promote cutting-edge research on deep-sea organisms,and note the remaining challenges and developing directions for deep-sea equipment.

关键词： Deep sea Extreme life Equipment Biological diversity environmental adaptation Ecosystem connectivity

Nitrogen/sulphur dual-doped hierarchical carbonaceous fibers boosting potassium-ion storage

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Journal of Energy Chemistry 2021年第4期30卷 420-427页

作者： Junzhi Li Junming Cao Xifei Li Junhua Hu Yaohui Zhang Hirbod Maleki Kheimeh Sari Chunxiao Lv IgorVZatovsky Wei Han Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology College of PhysicsJilin UniversityChangchun 130012JilinChina Xi'an Key Laboratory of New Energy Materials and Devices Institute of Advanced Electrochemical Energy&School of Materials Science and EngineeringXi’an University of TechnologyXi’an 710048ShaanxiChina State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhou 450001HenanChina School of Physics Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong ProvinceSchool of Environmental Science and EngineeringQingdao UniversityQingdao 266071ShandongChina International Center of Future Science Jilin UniversityChangchun 130012JilinChina

The carbon materials as anode electrodes have been widely studied for potassium ion batteries(PIBs).However,the large size of potassium ions prevents their intercalation/deintercalation,resulting in poor storage ***,a novel design of N/S codoped hierarchical carbonaceous fibers(NSHCF)formed from nanosheets self-assembled by catalyzing Aspergillus niger with Sn is *** asprepared NSHCF at 600℃(NSHCF-600)exhibits a high reversible capacity of 345.4 m Ah g^(-1) at 0.1 A g^(-1) after 100 cycles and an excellent rate performance of 124.5 m Ah g^(-1) at 2 A g^(-1).The excellent potassium storage performance can be ascribed to the N/S dual-doping,which enlarges interlayer spacing(0.404 nm)and introduces more *** larger interlayer spacing and higher pyridinic N active sites can promote K ions diffusion and *** addition,the ex situ transmission electron microscopy reveals the high reversibility of potassiation/depotassiation process and structural stability.

关键词： Carbonaceous fibers Large interlayer spacing Nitrogen/sulphur dual-doping Potassium-ion batteries

Biocorrosion resistance and biocompatibility of Mg-AI layered double hydroxide/poly(L-lactic acid) hybrid coating on magnesium alloy AZ31

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Frontiers of Materials science 2020年第4期14卷 426-441页

作者： Xiang SUN Qing-Song YAO Yu-Chao LI Fen ZHANG Rong-Chang ZENG Yu-Hong ZOU Shuo-Qi LI Corrosion Laboratory ftor Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252059China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

A Mg-AI layered double hydroxide(Mg-AI-LDH)coating was firstly synthesized via an in-situ steam coating growth method on the AZ31 Mg alloy,and then was modified with poly(L-lactic acid)(PLLA)via dipping and vacuum *** microstructure and composition of LDH/PLLA hybrid coating were analyzed by XRD,SEM,EDS and *** biocorrosion behavior of hybrid coating was evaluated by potentiodynamic polarization,electrochemical impedance spectroscopy(EIS)and hydrogen evolution test in the Hank's *** results showed that LDH/PLLA coatings exhibited a much dense layer compared to the unmodified Mg-AI-LDH coating with unobvious boundary between PLLA and LDH *** corrosion current density of the LDH/PLLA-10 hybrid coating decreased three orders of magnitude in comparison to its *** was proven that the existence of the PLLA coating further prolonged the service life of the Mg-AI-LDH ***'s more,the MTT assay and livel dead staining showed that the LDH/PLL A-10 coating had good biocompatibility for Mouse NIH3T3 *** formation mechanism and the anti-corrosion mechanism of hybrid coatings were proposed.

关键词： magnesium alloy layered double hydroxide poly(L-lactic acid) corrosion resistance biocompatbility