Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 12

年份

2023 3

2022 2

2021 2

2020 2

2004 2

2003 1

关键词

乙烯 1

制备工艺 1

块体非晶合金 1

增强剂 1

尼龙66树脂 1

工业控制系统（ICS）；ICS协议逆向工程；动态污点分析；协议格式 1

强化学习；多智能体系统；网络系统；一致性优化；分布式优化；博弈论 1

扩能 1

抗静电 1

方案 1

熔盐 1

玻璃 1

真空度 1

研究 1

装置 1

展开︾

检索范围：

排序：展示方式：

Research progress of defect-engineered UiO-66(Zr) MOFs for photocatalytic hydrogen production

《能源前沿（英文）》 2021年第15卷第3期页码 656-666 doi: 10.1007/s11708-021-0765-9

摘要： In recent years, defect-engineered Zr-based UiO-66 metal-organic frameworks (UiO-66(Zr) metal-organic frameworks (MOFs)) have shown huge advantages in catalytic, functional materials, adsorption, and other fields due to their large surface areas, well-ordered porous structures, and flexible tailorability. It is extremely challenging to introduce defect sites in the synthesis of MOFs to regulate the physicochemical properties of materials such as (energy band structure, pore structure, etc.) to obtain an excellent performance. This paper reviews the recent research results of synthesis methods, characterization technologies, and application fields of defect-engineered UiO-66(Zr) MOFs materials in order to provide new insights to synthesize high-performance UiO-66(Zr) MOFs materials and promote the development of UiO-66(Zr) in various fields.

关键词： defect engineering metal-organic frameworks UiO-66 photocatalysis

HTML PDF 收藏

Metal-organic framework UiO-66 membranes

Xinlei Liu

《化学科学与工程前沿（英文）》 2020年第14卷第2期页码 216-232 doi: 10.1007/s11705-019-1857-5

摘要： Metal-organic frameworks (MOFs) have emerged as a class of promising membrane materials. UiO-66 is a prototypical and stable MOF material with a number of analogues. In this article, we review five approaches for fabricating UiO-66 polycrystalline membranes including synthesis, secondary synthesis, biphase synthesis, gas-phase deposition and electrochemical deposition, as well as their applications in gas separation, pervaporation, nanofiltration and ion separation. On this basis, we propose possible methods for scalable synthesis of UiO-66 membranes and their potential separation applications in the future.

关键词： membrane metal-organic framework UiO-66 separation

HTML PDF 收藏

Benzenesulfonic acid-grafted UIO-66 with improved hydrophobicity as a stable Brønsted acid catalyst

《化学科学与工程前沿（英文）》 2023年第17卷第10期页码 1389-1398 doi: 10.1007/s11705-022-2285-5

摘要： Hydrothermal and catalytic stability of UIO-66 MOFs with defective structures are critical aspects to be considered in their catalytic applications, especially under the conditions involving water, moisture and/or heat. Here, we report a facile strategy to introduce the macromolecular acid group to UIO-66 to improve the stability of the resulting UIO-66−PhSO₃H MOF in aqueous phase catalysis. In detail, UIO-66−PhSO₃H was obtained by grafting benzenesulfonic acid on the surface of the pristine UIO-66 to introduce the hydrophobicity, as well as the Brønsted acidity, then assessed using catalytic hydrolysis of cyclohexyl acetate (to cyclohexanol) in water. The introduction of hydrophobic molecules to UIO-66 could prevent the material from being attacked by hydroxyl polar molecules effectively, explaining its good structural stability during catalysis. UIO-66−PhSO₃H promoted the conversion of cyclohexyl acetate at ca. 87%, and its activity and textural properties were basically intact after the cyclic stability tests. The facile modification strategy can improve the hydrothermal stability of UIO-66 significantly, which can expand its catalytic applications in aqueous systems.

关键词： metal−organic frameworks (MOFs) UIO-66 hydrolysis of cyclohexyl acetate hydrophobicity Brønsted acidity

HTML PDF 收藏

Construction of defect-containing UiO-66/MoSe heterojunctions with superior photocatalytic performance

《化学科学与工程前沿（英文）》 2023年第17卷第4期页码 449-459 doi: 10.1007/s11705-022-2226-3

摘要： Metal–organic frameworks are recognized as promising multifunctional materials, especially metal–organic framework-based photocatalysts, which are considered to be ideal photocatalytic materials. Herein, a new type of UiO-66/MoSe₂ composite was prepared using the solvothermal method. The optimum composite was selected by adjusting the mass ratio of UiO-66 and MoSe₂. X-ray diffraction analysis showed that the mass ratio influenced the crystal plane exposure rate of the composite, which may have affected its photocatalytic performance. The composite is composed of ultra-thin flower-like MoSe₂ that wrapped around cubic UiO-66, a structure that increases the abundance of active sites for reactions and is more conducive to the separation of carriers. The photocatalytic properties of the composite were evaluated by measuring the degradation rate of Rhodamine B and the catalyst’s ability to reduce Cr(VI)-containing wastewater under visible light irradiation. Rhodamine B was decolorized completely in 120 min, and most of the Cr(VI) was reduced within 150 min. The photochemical mechanism of the complex was studied in detail. The existence of Mo⁶⁺ and oxygen vacancies, in addition to the Z-type heterojunction promote the separation of electrons and holes, which enhances the photocatalytic effect.

关键词： UiO-66/MoSe₂ photocatalysis dye-containing wastewater heavy metal wastewater oxygen vacancies

HTML PDF 收藏

Flow synthesis of a novel zirconium-based UiO-66 nanofiltration membrane and its performance in the removal

Feichao Wu, Yanling Wang, Xiongfu Zhang

《化学科学与工程前沿（英文）》 2020年第14卷第4期页码 651-660 doi: 10.1007/s11705-019-1819-y

摘要： In this work, a thin zirconium-based UiO-66 membrane was successfully prepared on an alumina hollow fiber tube by flow synthesis, and was used in an attempt to remove -nitrophenol from water through a nanofiltration process. Two main factors, including flow rate and synthesis time, were investigated to optimize the conditions for membrane growth. Under optimal synthesis conditions, a thin UiO-66 membrane of approximately 2 µm in thickness was fabricated at a flow rate of 4 mL·h for 30 h. The -nitrophenol rejection rate for the as-prepared UiO-66 membrane applied in the removal of -nitrophenol from water was only 78.1% due to the existence of membrane defects caused by coordinative defects during membrane formation. Post-synthetic modification of the UiO-66 membrane was carried out using organic linkers with the same flow approach to further improve the nanofiltration performance. The result showed that the -nitrophenol rejection for the post-modified membrane was greatly improved and reached over 95%. Moreover, the post-modified UiO-66 membrane exhibited remarkable long-term operational stability, which is vital for practical application.

关键词： UiO-66 membrane flow synthesis nanofiltration p-nitrophenol removal

HTML PDF 收藏

Integrating of metal-organic framework UiO-66-NH2 and cellulose nanofibers mat for high-performance adsorption

《化学科学与工程前沿（英文）》 2022年第16卷第9期页码 1387-1398 doi: 10.1007/s11705-022-2154-2

摘要： UiO-66-NH₂ is an efficient material for removing pollutants from wastewater due to its high specific surface area, high porosity and water stability. However, recycling them from wastewater is difficult. In this study, the cellulose nanofibers mat deacetylated from cellulose acetate nanofibers were used to combine with UiO-66-NH₂ by the method of in-situ growth to remove the toxic dye, rose bengal. Compared to previous work, the prepared composite could not only provide ease of separation of UiO-66-NH₂ from the water after adsorption but also demonstrate better adsorption capacity (683 mg∙g^‒1 (T = 25 °C, pH = 3)) than that of the simple UiO-66-NH₂ (309.6 mg∙g^‒1 (T = 25 °C, pH = 3)). Through the analysis of adsorption kinetics and isotherms, the adsorption for rose bengal is mainly suitable for the pseudo-second-order kinetic model and Freundlich model. Furthermore, the relevant research revealed that the main adsorption mechanism of the composite was electrostatic interaction, hydrogen bonding and π–π interaction. Overall, the approach depicts an efficient model for integrating metal-organic frameworks on cellulose nanofibers to improve metal-organic framework recovery performance with potentially broad applications.

关键词： UiO-66-NH₂ cellulose nanofibers rose bengal adsorption mechanism

HTML PDF 收藏

抗静电增强尼龙66研制

刘建强

《中国工程科学》 2004年第6卷第6期页码 77-78

摘要：

以阴离子和非离子型抗静电剂组成复合抗静电体系，用玻璃纤维为增强剂，研制成具有良好抗静电和机械性能优良的尼龙66；介绍了抗静电复合体系及玻璃纤维含量对抗静电增强尼龙性能的影响。

关键词：尼龙66树脂抗静电增强剂

HTML PDF 收藏

Continuous amino-functionalized University of Oslo 66 membranes as efficacious polysulfide barriers for

《化学科学与工程前沿（英文）》 2023年第17卷第2期页码 194-205 doi: 10.1007/s11705-022-2206-7

摘要： The shuttle effect of soluble polysulfides is a serious problem impeding the development of lithium−sulfur batteries. Herein, continuous amino-functionalized University of Oslo 66 membranes supported on carbon nanotube films are proposed as ion-permselective interlayers that overcome these issues and show outstanding suppression of the polysulfide shuttle effect. The proposed membrane material has appropriately sized pores, and can act as ionic sieves and serve as barriers to polysulfides transport while allowing the passage of lithium ions during electrochemical cycles, thereby validly preventing the shuttling of polysulfides. Moreover, a fast catalytic conversion of polysulfides is also achieved with the as-developed interlayer. Therefore, lithium−sulfur batteries with this interlayer show a desirable initial capacity of 999.21 mAh·g^–1 at 1 C and a durable cyclic stability with a decay rate of only 0.04% per cycle over 300 cycles. Moreover, a high area capacity of 4.82 mAh·cm^–2 is also obtained even under increased sulfur loading (5.12 mg·cm^–2) and a lean-electrolyte condition (E/S = 4.8 μL·mg^–1).

关键词： lithium−sulfur batteries amino-functionalized University of Oslo 66 membrane polysulfide interlayer

HTML PDF 收藏

Zr₆₆Al₉Cu₁₆Ni₉块体非晶合金制备工艺研究

阮许平,阮宏伟

《中国工程科学》 2004年第6卷第5期页码 76-78

摘要：

运用真空电弧炉熔炼合金制备试样，采用三种不同的方法对金属熔体进行处理，试样的X射线衍射晶化相分析结果表明，B₂O₃和Na₂SiO₃的混合物与所选组分的熔体发生了反应，不适合作Zr基合金的包裹物；组分为CaF₂(45%)，AlF₃(50%)，CaO(5%)以及微量的TiO₂的氟盐，由于该净化剂与所选的组分发生了反应，不适合Zr基合金的净化；设备的高真空度、原材料成分的高纯度是促进合金形成非晶态的重要因素。

关键词：块体非晶合金制备工艺玻璃熔盐真空度

HTML PDF 收藏

燕山石化公司乙烯装置66×10⁴t/a扩能改造方案的研究与决策

曹湘洪

《中国工程科学》 2003年第5卷第11期页码 34-46

摘要：经改造，实现了生产能力扩大到66×10⁴t/a的目标，实际可达71×10⁴t/a，装置能耗明显下降，石脑油、轻柴油、重柴油、加氢裂化尾油均可作为乙烯原料

关键词：乙烯装置扩能方案研究

HTML PDF 收藏

带有网络智能体的去中心化多智能体强化学习进展 Review Article

张凯清1,杨卓然2,Tamer BAŞAR1

《信息与电子工程前沿（英文）》 2021年第22卷第6期页码 802-814 doi: 10.1631/FITEE.1900661

摘要：多智能体强化学习长期以来一直是机器学习和控制领域的重要研究课题。最近在（单智能体）深度强化学习领域的进展重新唤醒了对多智能体强化学习的研究兴趣，尤其在理论分析方面。本文回顾这个大课题中的一个子领域：带有网络智能体的去中心化多智能体强化学习。在这一场景中，多个智能体在一个共同的环境中进行序贯决策，无需中心控制器的协调，且智能体被允许和它们在通信网络上的邻居交换信息。这样的一个模型在很多方向都有相关应用，包括机器人控制、无人车控制、移动传感器网络控制、智能电网，等等。本综述旨在覆盖和整理我们和其他科研人员在这一方向的相关工作。我们希望该综述能够激发更多研究热情，投入到这个激动人心却又充满挑战的领域。

关键词：强化学习；多智能体系统；网络系统；一致性优化；分布式优化；博弈论

HTML PDF 收藏

基于动态污点分析的工业控制系统协议自动逆向工程分析 Research Articles

麻荣宽1,郑豪2,王竟亦2,汪慕峰2,魏强1,王清贤1

《信息与电子工程前沿（英文）》 2022年第23卷第3期页码 351-360 doi: 10.1631/FITEE.2000709

摘要：私有（或半私有）协议广泛应用于工业控制系统（ICS）。通过逆向工程推断协议格式对于许多网络安全应用（例如程序测试和入侵检测）具有重要意义。传统协议逆向工程方法耗时，繁琐、易出错。最近提出的自动化逆向协议方法既不能有效处理基于网络流量分析的二进制ICS协议，也不能从协议程序实现中准确提取协议字段。本文提出一个工业控制系统协议逆向工程框架（ICSPRF），旨在以更高准确度提取ICS协议字段。ICSPRF基于以下关键见解架构：消息中单个字段通常在同一执行上下文中处理，例如基本块（BBL）组。通过监视程序的执行，ICSPRF可以在执行跟踪中收集每个BBL组中处理的污染数据信息，并将它们聚类以得出协议格式。用6个开源ICS协议实现评估所提方法。结果表明，ICSPRF可以高精度地识别各个协议字段（平均匹配率为94.3％）。ICSPRF还具有较低粗粒度匹配率和过细粒度匹配率。对于同一指标，ICSPRF比Autoformat更准确（后者对于所有评估协议匹配率为88.5％，对二进制协议匹配率为80.0％）。

关键词：工业控制系统（ICS）；ICS协议逆向工程；动态污点分析；协议格式

HTML PDF 收藏

标题作者时间类型操作

Research progress of defect-engineered UiO-66(Zr) MOFs for photocatalytic hydrogen production

期刊论文

Metal-organic framework UiO-66 membranes

Xinlei Liu

期刊论文

Benzenesulfonic acid-grafted UIO-66 with improved hydrophobicity as a stable Brønsted acid catalyst

期刊论文

Construction of defect-containing UiO-66/MoSe heterojunctions with superior photocatalytic performance

期刊论文