检索结果-内蒙古大学图书馆

Characterization strategy of polymeric transition metal species transformation for high-purity metal recovery

Green chemical engineering 2021年第3期2卷 309-316页

作者： Jiawei Wen Yan Wu Shujie Lin Pengge Ning Beijing Engineering Research Center of Process Pollution Control Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing100190China School of Chemical Engineering and Technology Xi'an Jiaotong University28 Xianning West RoadXi'an710049China Collaborative Innovation Center of Chemical Science and Engineering Tianjin300072China

The aqueous metal species with similar chemical properties are usually extracted together,limiting deep separation for high-purity ***,rare attention has been paid to metal speciation characterization and transformation during ***,the hydrolysis evolution of polymeric metal species was investigated systematically by electrospray ionization time-of-flight mass spectrometry(ESI-TOF-MS).The transformation evolutions were visualized with respect to characteristic vanadium species(V_(1),V_(2),V_(3),V_(4) and V_(10)),chromium species(Cr_(1) and Cr_(2)),tungsten(W_(1),W_(2),W_(4),W_(6) and W_(10))and molybdenum(Mo_(1),Mo_(2) and Mo_(4))*** key characteristics(such as specfic pHs and concentrations)for speciation variation were *** polymerization behavior of several transition metals can be semiquantitative characterized by this *** sufficient speciation transformation provides a solid base for metal speciation chemistry,and guides further development of high-purity metal recovery.

关键词： Metal ion speciation WPPC Vanadium recovery Polymerization behavior ESI-TOF-MS

来源：评论

学校读者我要写书评

暂无评论

瑞德西韦核碱基单元的连续流合成

引用

engineering 2023年第2期21卷 92-100,M0005页

作者：郭永兴刘敏杰姜梅芬陶媛程荡陈芬儿 Pharmaceutical Research Institute Key Laboratory of Green Chemical Engineering Process of Ministry of EducationSchool of Chemical Engineering and PharmacyWuhan Institute of TechnologyWuhan 430205China Engineering Center of Catalysis and Synthesis for Chiral Molecules Department of ChemistryFudan UniversityShanghai 200433China Shanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs Shanghai 200433China

本研究采用五步连续流法合成了抗病毒药物瑞德西韦的碱基单元7-溴吡咯[2,1-f][1,2,4]三嗪-4-胺。采用间歇式合成化学方法,以吡咯为原料,通过序流操作成功制备了7-溴吡咯[2,1-f][1,2,4]三嗪-4-胺。在最优流动条件下,7-溴吡咯[2,1-f][1,2... 详细信息

本研究采用五步连续流法合成了抗病毒药物瑞德西韦的碱基单元7-溴吡咯[2,1-f][1,2,4]三嗪-4-胺。采用间歇式合成化学方法,以吡咯为原料,通过序流操作成功制备了7-溴吡咯[2,1-f][1,2,4]三嗪-4-胺。在最优流动条件下,7-溴吡咯[2,1-f][1,2,4]三嗪-4-胺的分离率为14.1%,总停留时间为79min,通量为2.96 g·h^(-1)。总停留时间明显短于批处理过程所消耗的总时间(>26.5 h)。在流动中,有利于高放热的Vilsmeier-Haack反应和N-胺化反应,这些反应涉及危险和不稳定的中间体、氧化液-液两相转化以及需要严格低温条件的溴化反应。这种合成的显著特点是,通过部署专用设备和分离单元,将后处理程序完全集成到反应序列中,从而形成一个流线型的连续流系统,最大限度地提高了整体工艺效率。该方法是一种更环保、更可持续的高效、安全制备这种碱基单元的方法。

关键词：合成化学胺化反应后处理程序溴化反应核碱基专用设备连续流抗病毒药物

来源：评论

学校读者我要写书评

暂无评论

Degradation kinetics and disinfection by-products formation of benzophenone-4 during UV/persulfate process

引用

Environmental Technology (United Kingdom) 2024年第26期45卷 5618-5629页

作者： Hu, Chen-Yan Xiong, Cun Lin, Yi-Li Zhang, Tian-Yang College of Environmental and Chemical Engineering Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems Shanghai University of Electric Power Shanghai China Shanghai Institute of Pollution Control and Ecological Security Shanghai China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai China

The degradation kinetics, reaction pathways, and disinfection by-products formation of an organic UV filter, benzophenone-4 (BP4) during UV/persulfate oxidation were investigated. BP4 can hardly be degraded by UV alone, but can be effectively decomposed by UV/persulfate following pseudo-first order kinetics. BP4 degradation rate was enhanced with increasing persulfate dosage and decreasing pH from 8 to 5. However, the degradation rate of BP4 at pH 9 was higher than that at pH 8 because of the presence of phenolic group in BP4 structure. and (Formula presented.) were confirmed as the major contributors to BP4 decomposition in radical scavenging experiments, and the second-order rate constants between (Formula presented.) and BP4 as well as those between (Formula presented.) and BP4 were estimated by establishing and solving a kinetic model. The presence of (Formula presented.) and humic acid inhibited the decomposition of BP4, while (Formula presented.) promoted it. The mineralisation of BP4 was only 9.1% at the persulfate concentration of 50 μM. Six degradation intermediates were identified for the promulgation of the reaction pathways of BP4 during UV/persulfate oxidation were proposed as a result. In addition, the formation of DBP in the sequential chlorination was evaluated at different persulfate dosages, pH values, and water matrix. The results of this study can provide essential knowledge for the effective control of DBP formation with reducing potential hazard to provide safe drinking water to the public. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Rate constants

来源：评论

学校读者我要写书评

暂无评论

Functional meniscus reconstruction with biological and biomechanical heterogeneities through topological self-induction of stem cells

引用

Bioactive Materials 2024年第6期36卷 358-375页

作者： Mingze Du Kangze Liu Huinan Lai Jin Qian Liya Ai Jiying Zhang Jun Yin Dong Jiang Department of Sports Medicine Peking University Third HospitalInstitute of Sports Medicine of Peking UniversityBeijing Key Laboratory of Sports InjuriesEngineering Research Center of Sports Trauma Treatment Technology and DevicesMinistry of EducationBeijingChina The State Key Laboratory of Fluid Power Transmission and Control Systems Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityZhejiang310058China Department of Engineering Mechanics Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceZhejiang UniversityZhejiang310058China School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological University639798Singapore

Meniscus injury is one of the most common sports injuries within the knee joint,which is also a crucial pathogenic factor for osteoarthritis(OA).The current meniscus substitution products are far from able to restore meniscal biofunctions due to the inability to reconstruct the gradient heterogeneity of natural meniscus from biological and biomechanical ***,inspired by the topology self-induced effect and native meniscus microstructure,we present an innovative tissue-engineered meniscus(TEM)with a unique gradient-sized diamond-pored microstructure(GSDP-TEM)through dual-stage temperature control 3D-printing system based on the mechanical/biocompatibility compatible high M_(w) poly(ε-caprolactone)(PCL).Biologically,the unique gradient microtopology allows the seeded mesenchymal stem cells with spatially heterogeneous differentiation,triggering gradient transition of the extracellular matrix(ECM)from the inside ***,GSDP-TEM presents excellent circumferential tensile modulus and load transmission ability similar to the natural *** implantation in rabbit knee,GSDP-TEM induces the regeneration of biomimetic heterogeneous neomeniscus and efficiently alleviates joint *** study provides an innovative strategy for functional meniscus *** self-induced cell differentiation and biomechanical property also provides a simple and effective solution for other complex heterogeneous structure reconstructions in the human body and possesses high clinical translational potential.

关键词： Tissue-engineered meniscus Functional reconstruction Mesenchymal stem cells Heterogeneity Topology structure

来源：评论

学校读者我要写书评

暂无评论

Efficient continuous synthesis of 2-[3-(trifluoromethyl)phenyl]malonic acid,a key intermediate of Triflumezopyrim,coupling with esterification-condensation-hydrolysis

引用

Chinese chemical Letters 2025年第1期36卷 234-238页

作者： Yuexiang Liu Xiangqiao Yang Tong Lin Guantian Yang Xiaoyong Xu Bubing Zeng Zhong Li Weiping Zhu Xuhong Qian Shanghai Key Laboratory of Chemical Biology School of PharmacyEast China University of Science and TechnologyShanghai 200237China Shanghai Frontiers Science Center of Optogenetic Techniques for Cexll Metabolism School of PharmacyEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237China Engineering Research Center of Pharmaceutical Process Chemistry Ministry of EducationSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistrySchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200241China

Triflumezopyrim(TFM)is a novel mesoionic pyrido[1,2-α]pyrimidinones insecticide,which acts on nicotinic acetylcholine receptors(n ACh Rs)and has no cross-resistance with other ***,we firstly developed a new continuous flow approach to synthesis 2-[3-(trifluoromethyl)phenyl]malonic acid,a key intermate of TFM,coupling with esterification,condensation,and *** three-step reactions were optimized and transformed into a continuous synthesis mode by three micro reaction *** with the batch mode,the total reaction time and overall separation yield were improved from more than 12 h and 60%to 18 min and 73.38%,*** solvent consumption and waste emission were significantly reduced,which also provides an eco-friendly and efficient potential tool for the development and production of mesoionic pyrido[1,2-α]pyrimidinones insecticide.

关键词： Triflumezopyrim(TFM) 2-[3-(Trifluoromethyl)phenyl]malonic acid Continuous flow synthesis Micro-reactor

来源：评论

学校读者我要写书评

暂无评论

Inhibitor-Sandwiched Polyelectrolyte Film for Micro/Nanopore Sealing to Enable Corrosion-Resistant Self-Healing Capability (vol 6, pg 4037, 2024)

引用

ACS APPLIED POLYMER MATERIALS 2024年第12期6卷 7339-7339页

作者： Xie, Zhi-Hui Zhang, Wenxi Li, Yanqiu Yong, Qiwen Wu, Liang Fan, Xiaoqiang Zhong, Chuan-Jian Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical Engineering China West Normal University Nanchong 637002 P. R. China College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys Chongqing University Chongqing 400044 P. R. China Key Laboratory of Advanced Technologies of Materials (Ministry of Education) School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 P. R. China Department of Chemistry State University of New York at Binghamton Binghamton New York 13902 United States

Layered double hydroxide (LDH) layers have emerged as a promising class of materials in preparing functional coatings due to their specific anion exchangeability. However, most LDH-based films exhibit micro- and nanoscale pores that are not conducive enough to block corrosive media penetration. This report demonstrates a corrosion-resistant LDH-based composite coating with an 8-hydroxyquinoline (8HQ)-sandwiched polyelectrolyte outer film. This polyelectrolyte film is flat and dense, enabling an effective pore-sealing of the LDH layer on the magnesium alloy and preventing the dissolution and diffusion of inhibitor into the bulk solution. This strategy is shown to enhance the corrosion protection performance significantly. Electrochemical measurements, including the scanning vibrating electrode technique (SVET), confirm that the as-prepared composite coating exhibits very high charge transfer resistance (∼90 MΩ·cm2), extremely low corrosion current density (<1.0 nA cm–2), and superior self-healing capability. The high-performance corrosion protection is attributed to a combination of the ion-exchange capability of the LDH phase, corrosion inhibition of the 8HQ inhibitor, intrinsic properties and sealing effect of the polyelectrolyte, and decreased hydrophilicity. These findings provide insight into highly efficient sealing for porous layers on metal surfaces to achieve coating with long-term corrosion protection and self-healing capability.

关键词： Coating materials Electrochemistry Inorganic compounds Oxidation Polyelectrolytes

来源：评论

学校读者我要写书评

暂无评论

Compositional engineering of HKUST-1/sulfidized NiMn-LDH on functionalized MWCNTs as remarkable bifunctional electrocatalysts for water splitting

引用

Carbon Energy 2023年第12期5卷 1-20页

作者： Mengshan Chen Reza Abazari Soheila Sanati Jing Chen Mingyuzhi Sun Cunhong Bai Alexander M.Kirillov Yingtang Zhou Guangzhi Hu Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine AquacultureMarine Science and Technology CollegeZhejiang Ocean UniversityZhoushanChina Department of Chemistry Faculty of ScienceUniversity of MaraghehMaraghehIran State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia UniversityYinchuanChina Departamento de Engenharia Química Centro de Química EstruturalInstitue of Molecular SciencesInstituto Superior TécnicoUniversidade de LisboaLisbonPortugal School of Ecology and Environmental Science Institute for Ecological Research and Pollution Control of Plateau LakesYunnan UniversityKunmingChina

Water-splitting reactions such as the hydrogen evolution reaction(HER)and the oxygen evolution reaction(OER)typically require expensive noble metal-based *** has motivated researchers to develop novel,cost-effective electrocatalytic *** this study,a new multicomponent nanocomposite was assembled by combining functionalized multiwalled carbon nanotubes,a Cu-based metal–organic framework(MOF)(HKUST-1 or HK),and a sulfidized NiMn-layered double hydroxide(NiMn-S).The resulting nanocomposite,abbreviated as MW/HK/NiMn-S,features a unique architecture,high porosity,numerous electroactive Cu/Ni/Mn sites,fast charge transfer,excellent structural stability,and *** a current density of 10 mA cm-2,this dual-function electrocatalyst shows remarkable performance,with ultralow overpotential values of 163 mV(OER)or 73 mV(HER),as well as low Tafel slopes(57 and 75 mV dec-1,respectively).Additionally,its high turnover frequency values(4.43 s-1 for OER;3.96 s-1 for HER)are significantly superior to those of standard noble metal-based Pt/C and IrO2 *** synergistic effect of the nanocomposite's different components is responsible for its enhanced electrocatalytic performance.A density functional theory study revealed that the multi-interface and multicomponent heterostructure contribute to increased electrical conductivity and decreased energy barrier,resulting in superior electrocatalytic HER/OER *** study presents a novel vision for designing advanced electrocatalysts with superior performance in water *** composites have been utilized in water-splitting *** study investigates the use of the MW/HK/NiMn-S electrocatalyst for water splitting for the first time to indicate the synergistic effect between carbon-based materials along with layered double hydroxide compounds and porous compounds of *** unique features of each component in this composite can be an interesting topic in the field of water spl

关键词： bifunctional electrocatalyst electroactive sites multicomponent synergic effect water splitting

来源：评论

学校读者我要写书评

暂无评论

Rheological and tribological approaches as a tool for the development of sustainable lubricating greases based on nano-montmorillonite and castor oil

引用

Friction 2021年第2期9卷 415-428页

作者： Jose Enrique MARTÍN-ALFONSO María Jose MARTÍN-ALFONSO Concepción VALENCIA María Teresa CUBERES Department of Chemical Engineering and Materials Science Campus de“El Carmen”University of HuelvaChemical Product and Process Technology Research Center(Pro2TecS)Huelva 21071Spain Department of Applied Mechanics and Project Engineering University of Castilla-La ManchaAlmadén 13400Spain

This study investigates the development of novel montmorillonite/castor oil blends to formulate sustainable lubricating greases to promote the replacement of petrochemicals industry-derived materials by substances obtained from renewable ***,the effect of the thickener concentration on the rheological,chemical,thermal,tribological properties,and atomic force microscopy(AFM)microstructure of these systems were *** results showed that the C20A nanoclay content could be used to modulate the viscosity values,the linear viscoelastic functions,and tribological properties of these montmorillonite *** general,these gel-like dispersions exhibited remarkable lubricant properties;the samples showed values of the friction coefficient and wear scars similar or lower than those obtained with model bentonite grease.

关键词： lubricating greases nanoclay vegetable oil rheology tribology

来源：评论

学校读者我要写书评

暂无评论

Unlocking high-performance HCl adsorption at elevated temperatures: the synthesis and characterization of robust Ca–Mg–Al mixed oxides

引用

Environmental Science and Pollution research 2024年第18期31卷 27318-27328页

作者： Cao, Jun Cao, Songshan Zhu, Hualun National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing211111 China Center for Taihu Basin Institute of Water Science and Technology Hohai University Nanjing211111 China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing210096 China Department of Chemical Engineering University College London LondonWC1E 7JE United Kingdom

The presence of HCl and SO2 gas imposes limitations on syngas utilization obtained from household waste in a wide range of applications. The hydrotalcite-like compounds (HTLs) have been proved that could remove HCl efficiency. However, the research on impact of synthesis conditions of HTLs and SO2 on HCl removal was limited. In this study, a range of Ca–Mg–Al mixed oxide sorbents was synthesized by calcining HTLs, with variations in crystallization temperature, solution pH, and the Ca/Mg molar ratio. These sorbents were examined for their effectiveness in removing HCl at medium–high temperatures under diverse conditions. The adsorption performance of selected sorbents for the removal of HCl, SO2, and HCl-SO2 mixed gas at temperature of 350 °C, 450 °C, and 550 °C, respectively, was evaluated using thermogravimetric analysis (TGA). It was observed that the HTL synthesis parameters significantly influenced the HCl adsorption capacity of Ca–Mg–Al mixed oxides. Notably, HTLs synthesized at 60 °C, a solution pH of 10–11, and a Ca/Mg ratio of 4 exhibited superior crystallinity and optimal adsorption characteristics. For individual HCl and SO2 removal, temperature had a minor effect on HCl adsorption but significantly impacted SO2 adsorption rates. At temperatures above 550 °C, SO2 removal efficiency substantially decreased. When exposed to a mixed gas, the Ca–Mg–Al mixed oxides could efficiently remove both HCl and SO2 at temperatures below 550 °C, with HCl dominating the adsorption process at higher temperatures. This dual-action capability is attributed to several mechanisms through which HTL sorbents interacted with HCl, including pore filling, ion exchange, and cation exchange. Initially, HCl absorbed onto specific sites created by water and CO2 removal due to the surface’s polarity. Subsequently, HCl reacted with CaCO3 and CaO formed during HTL decomposition. Graphical abstract: (Figure presented.). © Crown 2024.

关键词： Adsorption

来源：评论

学校读者我要写书评

暂无评论

A Semisupervised Soft-Sensor of Just-in-Time Learning With Structure Entropy Clustering and Applications for Industrial processes Monitoring

IEEE Transactions on Artificial Intelligence

引用

IEEE Transactions on Artificial Intelligence 2023年第4期4卷 722-733页

作者： Li, Dong Liu, Yiqi Huang, Daoping Xu, Chong South China University of Technology Key Laboratory of Autonomous Systems and Networked Control Ministry of Education School of Automation Science and Engineering Guangzhou510640 China Technical University of Denmark Process and Systems Engineering Center Department of Chemical and Biochemical Engineering Lyngby2800 Denmark South China University of Technology School of Automation Science and Engineering Guangzhou510640 China Gannan Normal University School of Physics and Electronic Information Ganzhou341000 China

To monitor industrial processes properly, soft-sensors are widely used to predict significant but difficult-to-measure quality variables. However, the prediction performances of traditional data-driven soft-sensors are usually unacceptable once suffering from high-nonlinear, high-dimension, and imblance data issues. Therefore, a semisupervised soft-sensor, which is learned by a just-in-time method with structure entropy clustering (SS-JITL-SEC), is proposed aiming to improve prediction performance with a simpler way. Inspired by a divide and conquer strategy, a novel SEC method is proposed to achieve several clusters and then to translate the highly complex and nonlinear modeling problems into simple and linear ones. Moreover, the training dataset is extended through a mixed SS labeling approach. Finally, dissimilarity-based JITL works together with the resulting clustering subdatasets to formulate a local adaptive prediction model. Two datasets from different types of wastewater treatment plants are used to verify the effectiveness of the proposed soft-sensor. The results show that the SS-JITL-SEC soft-sensor can achieve better prediction performance than other standard counterparts, and even for effective process monitoring with the resulted residuals. © 2020 IEEE.

关键词： Entropy

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：