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MOF synthesis using waste PET for applications of adsorption, catalysis and energy storage

Green Energy & Environment 2024年第11期9卷 1650-1665页

作者： Hongmei li Jinming Lei liying Zhu Yanling Yao Yuanhua li Tianhao li Chuntian Qiu College of Food and Bioengineering Chengdu UniversityChengdu610106China ZJU-Hangzhou Global Scientifc and Technological Innovation Center Zhejiang UniversityHangzhou311215China School of Chemistry and Materials Engineering Huizhou UniversityHuizhou516007China Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy School for Materials and EnergySouthwest UniversityChongqing400715China Yibin Academy of Southwest University University RoadYibinSichuan644005China

Polyethylene terephthalate (PET) as one of non-degradable wastes has become a huge threat to the environment and human *** Recycle of PET is a sustainable way to release 1,4-benzenedicarboxylic acid (BDC) the monomer of PET as common used organiclinker for synthesis of functional Metal–organic-frameworks (PET-derived MOFs) such as UiO-66, MIL-101, etc. This sustainable and costeffective“Waste-to-MOFs” model is of great signiﬁcant to be intensively investigated in the past years. Attributes of substantial porosity, speciﬁcsurface area, exposed metal centers, uniform structure, and ﬂexible morphology render PET-derived MOFs are well-suited for applications inadsorption, energy storage, catalysis, among others. Herein, in the present work, we have summarized recent advances in synthesis of PETderived MOFs using ex-situ and in-situ methods for typical applications of adsorption, catalysis and energy storage. Despite those improvementsin synthesis methods and potential applications, challenges still remain in development of green and economical routes to fully utilize waste PETfor massive manufacture of valuable MOF materials and chemicals. This review provides insights into the conversion of non-degradable PETwaste to value-added MOF materials, and further suggests promising perspectives to develop the sustainable “Waste-to-MOFs” model inaddressing environmental pollution and energy crises.

关键词： Plastic waste Polyethylene terephthalate Chemical recycle 1,4-benzenedicarboxylic acid Metal organic frameworks

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Lower Crustal Flow and Its Relation to the Surface Deformation and Stress Distribution in Western Sichuan Region, China

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Journal of Earth Science 2014年第4期25卷 630-637页

作者： Yujiang li lianwang Chen Pei Tan Hong li Key Laboratory of Crustal Dynamics Institute of Crustal Dynamics China Earthquake Administration School of the Earth Sciences and Resources China University of Geosciences Earthquake Administration of Beijing Municipality

The channel flow model was gradually being accepted with the more important multidisci- plinary evidences from geology and geophysics, but how the lower crustal flow influenced the surface deformation quantitatively was unknown. Here, we develop a three-dimensional viscoelastic model to explore the mechanical relations between the lower crustal flow and the surface deformation in western Sichuan. Based on numerous tests, our results show that the modeled results fit well with the observed GPS data when the lower crust flows faster than the upper crust about 11 mm/a in the rhombic block, which can be useful to understand the possible mechanism of the surface deformation in western Siehuan. Moreover, taking the Xianshuihe fault as an example, we preliminarily analyze the relation between the active fault and stress field, according to the boundary constraints that deduced from the best model. The results show that the maximum shear stress on the Xianshuihe fault zone is mainly located in the fault terminal, intersections and the bend of the fault geometry, the stress level on the northwestern segment that has the high slip rate is relatively high. Additionally, with the reduction of the Young＇s modulus in the fault zone, it＇s conducive to generate the greater strain distribution, hence forming the high stress level.

关键词： western Siehuan region lower crustal flow surface deformation stress distribution numerical simulation.

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Evolution of the Ordos Plateau and environmental effects

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Science China Earth Sciences 2007年第Z2期50卷 19-26页

作者： YUE LePing li JianXing ZHENG GuoZhang li ZhiPei State Key Laboratory of Continental Dynamics (Northwest University) Geology Department Northwest University Xi'an 710069 China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences(CAS)Xi'an 710075 China State Key Laboratory of Continental Dynamics(Northwest University) Geology Department Northwest University Xi'an 710069 China Xi'an Institute of Geology and Mineral Resources Xi'an 710054 China College of Urban and Environment Science Shanxi Normal University Linfen 041004 China Xi'an Institute of Geology and Mineral Resources Xi'an 710054 China

Based on the analysis of temporary-spatial distribution, geomorphic position, contact relationship with underlying strata and grain size of red clay, we studied the formation and environmental background of red clay. During late Miocene-Pliocene, the Ordos Block finished the transformation from the basin to the plateau, which had an obvious environmental effect on the topography, indicated by the formation of highland undergoing wind erosion and lowland receiving red clay deposits. The red clay materials were sourced from dusts carried by wind energy and covered on the initial topography. Unlike Quaternary loess dust covering the overall the Loess Plateau, red clay deposited on the highland would be transported to the lowlands by wind and fluvial process. As a result, there was no continuous "Red Clay Plateau" in the Ordos region and red clay was only preserved in former lowlands. However, red clay was discontinuously distributed through the Loess Plateau and to some extent modified the initial topography. The differential uplift in interior plateau is indicated by the uplift of northern Baiyushan, central Ziwuling and southern Weibeibeishan. The Weibeibeishan Depression formed earlier and became the sedimentary center of red clay resulting in the thicker red clay deposits in Chaona, lingtai and Xunyi. Since Quaternary the aridity in the northern plateau enhanced and accelerated loess accumulation caused the formation of the Loess Plateau. During the late Pleistocene the rapid uplift led to the enhancement of erosion. Especially after the cut-through of Sanme Lake by the Yellow River, the decline of base level caused the falling of ground water level and at the same time the increase of drainage density resulting in the enhancement of evaporation capacity, which enhanced the aridity tendency of aridity in the Loess Plateau region.

关键词： the Ordos Plateau, environmental effects, red clay-loess

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A Modified Method for Scene Text Detection by ResNet

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Computers, Materials & Continua 2020年第12期65卷 2233-2245页

作者： Shaozhang Niu Xiangxiang li Maosen Wang Yueying li School of Computer Science and Technology Beijing University of Posts and TelecommunicationsBeijing100876China College of Arts and Sciences Boston UniversityBoston UniversityBoston02215USA

In recent years,images have played a more and more important role in our daily life and social *** some extent,the textual information contained in the pictures is an important factor in understanding the content of the scenes *** more accurate the text detection of the natural scenes is,the more accurate our semantic understanding of the images will ***,scene text detection has also become the hot spot in the domain of computer *** this paper,we have presented a modified text detection network which is based on further research and improvement of Connectionist Text Proposal Network(CTPN)proposed by previous *** extract deeper features that are less affected by different images,we use Residual Network(ResNet)to replace Visual Geometry Group Network(VGGNet)which is used in the original ***,to enhance the robustness of the models to multiple languages,we use the datasets for training from multi-lingual scene text detection and script identification datasets(MLT)of 2017 International Conference on Document Analysis and Recognition(ICDAR2017).And apart from that,the attention mechanism is used to get more reasonable weight *** found the proposed models achieve 0.91 F1-score on ICDAR2011 test,better than CTPN trained on the same datasets by about 5%.

关键词： CTPN scene text detection ResNet attention

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Comparison of Thermal Performance for Two Types of ETFP System under Various Operation Schemes

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Computer Modeling in Engineering & Sciences 2020年第7期124卷 23-44页

作者： lingtong li Zaiguo Fu Benxiang li Qunzhi Zhu College of Energy and Mechanical Engineering Shanghai University of Electric PowerShanghai200090China Sino-Pipeline International Co. Ltd.Zhejiang312000China

The earth to fluid pipe(ETFP)system has been widely applied to various energy *** numerical model of the heat transfer process in the ETFP system with a shallow-buried horizontal or a deep-buried vertical U-shape pipe adopted in practical engineering was established and the model distinctions were pointed *** comparison of the thermal performance between the two types of ETFP system under various schemes was conducted on the basis of numerical *** results showed that the thermal parameters of the ETFP system with a shallow-buried horizontal pipe were influenced by the inlet velocity and ground temperature *** variation of the fluid temperature was smooth and the thermal influence zone was limited under the fixed *** proper intermittent operation scheme reduced 53.1%outlet fluid temperature *** contrast,the fluid temperature in the ETFP system with a deep-buried vertical U-shape pipe varied dramatically with the operation *** intermittent operation scheme with a relatively short interval led to a less temperature fluctuation of soil around the *** intermittent scheme is beneficial to the recovery of the thermal condition of soil around the U-shape *** results indicated a stark difference in thermal performance between the two types of *** study can provide guidance for the selection and operation of ETFP system in practical heat exchange engineering.

关键词： Heat transfer buried pipe ETFP heat exchange numerical simulation

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Synthesis Mechanism and Material Characterization of C4AF Obtained by the Self-propagating Combustion Reaction Method

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Journal of Wuhan University of Technology(Materials Science) 2018年第5期33卷 1099-1107页

作者： HE Zhen li Yang Shaanxi Key Laboratory of Safety and Durability of Concrete Structure Xoing UniversityXi＇an 710123China State Key Laboratory of Water Resources ＆ Hydropower Engineering Science Wuhan UniversityWuhan 430072China

To investigate the influence of preparation process on the properties of synthesized C4AF,the powder was prepared via the self-propagating combustion reaction（SPCR）method using urea as fuel and metal nitrates as cation *** mechanism of the SPCR method,calculation and adjusting principles of urea dosage were detailedly *** characterization of synthesized C4AF was performed with the aid of X-ray diffractometry,Fourier transform infrared spectrometry,scanning electron microscopy,energydispersive X-ray spectroscopy,^27Al nuclear magnetic resonance and isothermal microcalorimetric *** content of transition phase of calcium carbonate in synthesized C4AF was determined by quantitative analysis of X-ray *** was found that there was no difference in the hydration behavior of C4AF synthesized by the SPCR method and the traditional solid-state reaction（SSR）method.C3AH6 and amorphous iron（III）hydroxide（Fe（OH）3）would be formed during the hydration of C4AF while CH *** size of synthesized C4AF was 16.1 A and the apparent activation energy was 36.2 kJ/*** condition of Al in C4AF can be detected by ^27Al NMR technique,but the peaks were broadened and the intensities were relatively low,supporting the use of ^27Al NMR for the quantitative analysis of C3A in Portland cements.

关键词： C4AF self-propagating SPCR urea ^27Al NMR apparent activation energy

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Characterization of Hot Deformation Behavior of a Novel Al–Cu–li Alloy Using Processing Maps

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Acta Metallurgica Sinica(English Letters) 2015年第7期28卷 817-825页

作者： Xin-Xiang Yu Yi-Ran Zhang Deng-Feng Yin Zhi-Ming Yu Shu-Fei li School of Materials Science and Engineering Central South University School of Engineering Yantai Nanshan University

The isothermally compression deformation behavior of an elevated Cu/li weight ratio Al–Cu–li alloy was investigated under various deformation *** isothermal compression tests were carried out in a temperature range from 300 to 500℃ and at a strain rate range from 0.001 to 10 s^-*** results show that the peak stress level decreases with temperature increasing and strain rate decreasing,which is represented by the Zener–Hollomon parameter Z in the hyperbolic sine equation with the hot deformation activation energy of 218.5 k J/*** low Z value,the dynamic recrystallized grain is well formed with clean high-angle *** high Z value,a high dislocation density with poorly developed cellularity and considerable fine dynamic precipitates are *** on the experimental data and dynamic material model,the processing maps at strain of 0.3,0.5 and 0.7 were developed to demonstrate the hot workability of the *** results show that the main softening mechanism at high Z value is precipitate coarsening and dynamic recovery;the dynamic recrystallization of the alloy can be easily observed as ln Z ≤ 29.44,with peak efficiency of power dissipation of around 70%.At strains of 0.3,0.5 and 0.7,the flow instability domains are found at higher strain rates,which mainly locate at the upper part of processing *** addition,when the strain rate is 0.001 or 0.02 s^-1,there is a particular instability domain at 300–350℃.

关键词： Al-Cu-li alloy Hot deformation behavior Microstructure evolution Processing maps

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Reorganizing electronic structure of li3V2(PO4)3 using polyanion(BO3)^3-:towards better electrochemical performances

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Rare Metals 2017年第5期36卷 397-402页

作者： Yu li Ying Bai Zhi Yang Zhao-Hua Wang Shi Chen Feng Wu Chuan Wu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Doping modification of electrode materials is a sought-after strategy to improve their electrochemical performance in the secondary batteries field. Herein,polyanion（BO3）^3-doped li3V2（PO4）3 cathode materials were successfully synthesized via a wet coordination method. The effects of（BO3）^3- doping content on crystal structure, morphology and electrochemical performance were explored by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS）. All the asprepared samples have the same monoclinic structure;among them, li3V2（PO4）（2.75）（BO3）（0.15） sample has relatively uniform and optimized particle size. In addition, this sample has the highest discharge capacity and the best cycling stability, with an initial discharge capacity of 120.4mAh·g^-1, and after 30 cycles at a rate of 0.1C, the discharge capacity still remains 119.3 mAh·g^-1. It is confirmed that moderate polyanion（BO3）^3- doping can rearrange the electronic structure of the bulk li3V2（PO4）3,lower the charge transfer resistance and further improve the electrochemical behaviors.

关键词： lithium-ion batteries Cathode materials li3V2(PO4)3 Polyanion doping (BO3)^3-

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New perspective of Miocene marine hydrocarbon source rocks in deep-water area in Qiongdongnan Basin of northern South China Sea

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Acta Oceanologica Sinica 2012年第5期31卷 107-114页

作者： li Wenhao ZHANG Zhihuan li Youchuan FU Ning State Key Laboratory of Petroleum Resource and Prospecting China University of PetroleumBeijing 102249China CNOOC Research Institute Beijing 100027China

Drilling wells reveal that the organic matter abundance of Miocene marine source rocks in shallow water area of the Qiongdongnan Basin is relatively low with poor hydrocarbon generation poten- tial. However, in some drilling wells of deep water area close to the central depression belt, Miocene marine source rocks with better organic matter abundance and hydrocarbon generation have been found, which have achieved better source rock standard based on the analysis of geochemical charac- teristics. Although there are no exploratory wells in deep water area of the research region, through the comparative analysis of geochemical data of several typical exploratory wells respectively from shallow water area in the basin, central depression belt margin in deep-water area of the basin and Site 1148 of deep sea drilling in the South China Sea Basin, it reveals that the tendency of the quality of source rocks becomes positive gradually from delta to bathyal environment, which then becomes negative as in deep oceanic environment. Owing to the lack of terrestrial organic matter input, the important controlling factors of Miocene marine source rocks in the Qiongdongnan Basin are ocean productivity and preservation conditions of organic matter. The element geochemistry data indicate that the tendency of the paleoproductivity and the preservation conditions of organic matter become positive as water depth increase from shallow area to bathyal area close to central depression belt. So it is speculated that there must exist high quality source rocks in the central depression area where the preservation conditions of organic matter are much better. Besides, in theory, in oxygen-poor zone of oceanic environment at the water depth 400–1 000 m, the preservation conditions of organic matter are well thus forming high-quality marine source rocks. The result- ing speculation, it is reasonable to consider that there are high hydrocarbon generation potential source rocks in bathyal environme

关键词： hydrocarbon-generation potential marine source rocks ocean productivity preserva- tion condition deep water area deep sea drilling

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Nonadiabatic Population Transfer in a Tangent-Pulse Driven Quantum Model

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Chinese Physics Letters 2018年第1期35卷 27-30页

作者： Guang Yang Wei li li-Xiang Cen Center of Theoretical Physics College of Physical Science and Technology Sichuan University

Fine control of the dynamics of a quantum system is the key element to perform quantum information processing and coherent manipulations for atomic and molecular systems. We propose a control protocol using a tangentpulse driven model and demonstrate that it indicates a desirable design, i.e., of being both fast and accurate for population transfer. As opposed to other existing strategies, a remarkable character of the present scheme is that high velocity of the nonadiabatic evolution itself not only will not lead to unwanted transitions but also can suppress the error caused by the truncation of the driving pulse.

关键词： Nonadiabatic Population Transfer in a Tangent-Pulse Driven Quantum Model

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