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Locally Enhanced Flow and Electric Fields Through a Tip Effect for Efficient Flow‑Electrode Capacitive Deionization

Nano-Micro Letters 2025年第2期17卷 1-17页

作者： Ziquan Wang Xiangfeng Chen Yuan Zhang Jie Ma Zhiqun Lin Amor Abdelkader Maria‑Magdalena Titirici libo deng College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Research Center for Environmental Functional Materials College of Environmental Science and EngineeringTongji University1239 Siping RoadShanghai 200092People’s Republic of China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore Department of Engineering Faculty of Science and TechnologyBournemouth UniversityTalbot CampusFern BarrowPooleEngland BH125BBUK Institut de Chimie de Nice UniversitéCôte d’AzurUMR CNRS 727228 Av.Valrose06108 NiceFrance Department of Chemical Engineering Imperial College LondonSouth Kensington CampusExhibition RdLondon SW72AZUK

Low-electrode capacitive deionization(FCDI)is an emerging desalination technology with great potential for removal and/or recycling ions from a range of ***,it still suffers from inefficient charge transfer and ion transport kinetics due to weak turbulence and low electric intensity in flow electrodes,both restricted by the current ***,a new tip-array current collector(designated as T-CC)was developed to replace the conventional planar current collectors,which intensifies both the charge transfer and ion transport *** effects of tip arrays on flow and electric fields were studied by both computational simulations and electrochemical impedance spectroscopy,which revealed the reduction of ion transport barrier,charge transport barrier and internal *** the voltage increased from 1.0 to 1.5 and 2.0 V,the T-CC-based FCDI system(T-FCDI)exhibited average salt removal rates(ASRR)of 0.18,0.50,and 0.89μmol cm^(-2) min^(-1),respectively,which are 1.82,2.65,and 2.48 folds higher than that of the conventional serpentine current collectors,and 1.48,1.67,and 1.49 folds higher than that of the planar current ***,with the solid content in flow electrodes increased from 1 to 5 wt%,the ASRR for T-FCDI increased from 0.29 to 0.50μmol cm^(-2) min^(-1),which are 1.70 and 1.67 folds higher than that of the planar current ***,a salt removal efficiency of 99.89%was achieved with T-FCDI and the charge efficiency remained above 95%after 24 h of operation,thus showing its superior long-term stability.

关键词： Flow-electrode Capacitive deionization Current collector Tip effect Desalination

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Mutual Self‑Regulation of d‑Electrons of Single Atoms and Adjacent Nanoparticles for Bifunctional Oxygen Electrocatalysis and Rechargeable Zinc‑Air Batteries

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Nano-Micro Letters 2023年第4期15卷 40-57页

作者： Sundaram Chandrasekaran Rong Hu Lei Yao Lijun Sui Yongping Liu Amor Abdelkader Yongliang Li Xiangzhong Ren libo deng College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China College of Chemistry and Bioengineering Guilin University of TechnologyGuilin 541004People’s Republic of China Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsCollege of Materials Science and EngineeringGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen UniversityShenzhen 518060People’s Republic of China Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials Institute of New Energy for VehiclesSchool of Materials Science and EngineeringTongji UniversityShanghai 201804People’s Republic of China Department of Design and Engineering Faculty of Science&TechnologyBournemouth UniversityPoole BH125BBDorsetUK

Rechargeable zinc-air batteries(ZABs)are a promising energy conversion device,which rely critically on electrocatalysts to accelerate their rate-determining reactions such as oxygen reduction(ORR)and oxygen evolution reactions(OER).Herein,we fabricate a range of bifunctional M-N-C(metal-nitrogen-carbon)catalysts containing M-Nx coordination sites and M/MxC nanoparticles(M=Co,Fe,and Cu)using a new class ofγ-cyclodextrin(CD)based metal-organic framework as the *** the two types of active sites interacting with each other in the catalysts,the obtained Fe@C-FeNC and Co@C-CoNC display superior alkaline ORR activity in terms of low half-wave(E1/2)potential(~0.917 and 0.906 V,respectively),which are higher than Cu@C-CuNC(~0.829 V)and the commercial Pt/C(~0.861 V).As a bifunctional electrocatalyst,the Co@C-CoNC exhibits the best performance,showing a bifunctional ORR/OER overpotential(ΔE)of~0.732 V,which is much lower than that of Fe@C-FeNC(~0.831 V)and Cu@C-CuNC(~1.411 V),as well as most of the robust bifunctional electrocatalysts reported to *** X-ray absorption spectroscopy and density functional theory simulations reveal that the strong electronic correlation between metallic Co nanoparticles and the atomic Co-N4 sites in the Co@C-CoNC catalyst can increase the d-electron density near the Fermi level and thus effectively optimize the adsorption/desorption of intermediates in ORR/OER,resulting in an enhanced bifunctional electrocatalytic *** Co@C-CoNC-based rechargeable ZAB exhibited a maximum power density of 162.80 mW cm^(−2) at 270.30 mA cm^(−2),higher than the combination of commercial Pt/C+RuO2(~158.90 mW cm^(−2) at 265.80 mA cm^(−2))*** the galvanostatic discharge at 10 mA cm^(−2),the ZAB delivered an almost stable discharge voltage of 1.2 V for~140 h,signifying the virtue of excellent bifunctional ORR/OER electrocatalytic activity.

关键词： Cyclodextrin CD-MOF Single-atom catalyst ORR/OER Zinc-air battery

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A Home Automation Control System Based on LabVIEW

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World Journal of Engineering and Technology 2024年第3期12卷 501-521页

作者： libo deng CCTEG Xian Research Institute Xian China

The objective of this project is to explore the possibility of using X-10 and LabVIEW to control the device in the house. Based on the serial port communication of LabVIEW, the X-10 module can be programmed by using the X-10 commands. Through the power line, all the devices connected to the socket will be controlled. Without replacing the existing wire, it must be an easy control system for the user who has no experience in electronics or communication engineering. Actually, this is a quite practical X-10 home automation system.

关键词： Home Automation LabVIEW X-10 PROTOCOL Graphic Programming Communication

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Research and Application of Advanced Detection of Water Hazards in Coal Mine Bore-Hole

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Engineering（科研） 2024年第7期16卷 181-187页

作者： libo deng CCTEG Xian Research Institute Xian China

For many years, the “short excavation and short exploration” excavation mode has been mainly used in the underground tunnel excavation of coal mines, which is difficult to meet the needs of rapid tunnel excavation. For this reason, CCTEG Xi’an Research Institute has innovatively proposed a new working mode of “long excavation and long exploration” using directional long drilling and borehole geophysical exploration. This method utilizes directional long boreholes that have already been constructed, and uses transient electromagnetic technology in the borehole to detect the radial range of 30 meters and the depth exceeding 1000 meters of the borehole, ultimately forming a three-dimensional imaging of the entire spatial geological anomaly body, providing reliable technical support for the safety and long-term excavation of the tunnel. This paper introduces the application which is a long-distance advanced detection of 1026 m. .

关键词： Transient Electromagnetic Method Bore-Hole Transient Electromagnetic TEM Geophysical Exploration

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In-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into ZnFe_(2)O_(4) micro-sized capsules as high-performance lithium-ion battery anodes

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Journal of Materials Science & Technology 2021年第16期75卷 110-117页

作者： Wei Wu Yongshan Wei Hongjiang Chen Keyan Wei Zhitong Li Jianhui He libo deng Lei Yao Haitao Yang Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Transition metal oxides as anode materials for high-performance lithium-ion batteries suffer from severe capacity decay,originating primarily from particle pulverization upon volume expansion/shrinkage and the intrinsically sluggish electron/ion ***,in-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into micro-sized ZnFe_(2)O_(4) capsules is facilely fulfilled through a co-precipitation process and followed by heat-treatment at optimal calcination *** porous ZnFe_(2)O_(4) scaffold affords a synergistic confinement effect to suppress the grain growth ofα-Fe2 O3 nanocrystals during the calcination process and to accommodate the stress generated by volume expansion during the charge/discharge process,leading to an enhanced interfacial conductivity and inhibit electrode pulverization and mechanical failure in the active *** these merits,the preparedα-Fe_(2)O_(3)/Fe_(2)O_(4) composite delivers prolonged cycling stability and improved rate capability with a higher specific capacity than soleα-Fe_(2)O_(3) and Fe_(2)O_(4).The discharge capacity is retained at 700 mAh g-1 after 500 cycles at 200 mA g^(-1) and 940 mAh g^(-1) after 50 cycles at 100 m A g^(-1).This work provides a new perspective in designing transition metal oxides for advanced lithium-ion batteries with superior electrochemical properties.

关键词： α-Fe_(2)O_(3)/ZnFe_(2)O_(4)ceramic composite Co-precipitation process Confinement effect Interfacial effect Grain growth High conductivity Lithium-ion battery anodes

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Ultrasound Ranging with Selective Zone

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World Journal of Engineering and Technology 2024年第2期12卷 339-361页

作者： libo deng CCTEG Xi’ an Research Institute Xi&#8217an China

The technology of ultrasonic measurement has been widely applied in many fields in recent years. It has already been researched for almost 40 years and its application in both residential use and military are mature and well-developed. One of the advanced uses is for reversing a car and it is based on sending sound waves through a specific medium and observing the returning echoes to measure the distance from the device to the obstacle. In this report, a simple ultrasonic distance measurement system will be introduced including the design of hardware and software, the simulating results and the final product. This system was built to be cheaper, requires less power and delivers better performance.

关键词： Ultrasound Selective Zone

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Coupling of piezocatalysis and photocatalysis for efficient degradation of methylene blue by Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3) nanotubes

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Journal of Advanced Ceramics 2022年第7期11卷 1069-1081页

作者： Angom Devadatta MANI Jie LI Ziquan WANG Jiale ZHOU Huaicheng XIANG Jinlai ZHAO libo deng Haitao YANG Lei YAO Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518071China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China cCollege of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518071China

Photocatalytic degradation of organic pollutants is of great significance for wastewater remediation but is still hindered by the poor catalytic efficiency of the ***,we report a strategy to simultaneously introduce piezocatalysis and to enhance the intrinsic photocatalysis in a single catalyst,which improved the performance for catalytic degradation of methylene blue(MB)***,piezoelectric BiFeO_(3)(BFO)nanotube doped with different contents of Gd and La(Bi_(0.9)(GdxLa_(1−x))0.1FeO_(3))were produced by *** doping led to a higher concentration of surface oxygen vacancy(OV)in Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3),which effectively increased the piezoelectric field due to the deformation of BFO,and suppressed the recombination of photon-generated electron–hole *** Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3)nanotube showed excellent catalytic performance under simultaneous light irradiation and ultrasonic excitation,giving an extraordinary 95%degradation of MB within 90 *** findings suggest that the piezoelectric effect combined with defect engineering can enhance the catalytic performance of Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3)*** could potentially be extended to other catalytic systems for high-performance pollutant treatment.

关键词： photocatalysis piezocatalysis sonophotocatalysis oxygen vacancy(OV)

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Supramolecular-mediated ball-in-ball porous carbon nanospheres for ultrafast energy storage

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InfoMat 2022年第4期4卷 112-123页

作者： Lei Yao Junsheng Lin Yuanyuan Chen Xiujuan Li Dongrui Wang Haitao Yang libo deng Zijian Zheng College of Materials Science and Engineering Shenzhen UniversityShenzhenP.R.China Laboratory for Advanced Interfacial Materials and Devices Institute of Textiles and ClothingThe Hong Kong Polytechnic UniversityHong Kong SARChina College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenP.R.China

Hierarchical porous carbons are the most viable electrode material for supercapacitors because of their balanced capacitive performance and chemical *** pore connectivity plays a pivotal role in electrolyte transport,which is quantified by a new parameter,defined in this work as the longest possible pore separation(LPPS).Herein,we report hierarchical porous carbon nanospheres(HPC-NS)with a unique ball-in-ball structure,which is achieved by the pyrolysis of a supramolecular complex ofγ-cyclodextrin(γ-CD)/PEO-PPO-PEO(F127).This approach differs from the conventional softtemplating method in that,apart from the assembly of the monomicelles that leads to the host nanospheres(approximately 300 nm),theγ-CD-containing monomicelles themselves are converted to small porous carbon nanospheres(<10 nm),which results in an ultralow LPPS of 10 nm,representing the bestknown pore connectivity of the HPC *** HPC-NS delivers a high specific capacitance(405 F g^(-1)at 1 A g^(-1)and 71%capacitance retention at 200 A g^(-1)),wide voltage window(up to 1.6 V),and simultaneously high energy and power densities(24.3 Wh kg^(-1)at a power density of 151 W kg^(-1)and 9 Wh kg^(-1)at 105 W kg^(-1))in aqueous *** new strategy boosts the development of porous carbon electrodes for aqueous supercapacitors with simultaneously high power and energy densities.

关键词： hierarchical porous carbon pore connectivity supramolecular ultrafast energy storage

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葡萄糖衍生多孔碳的表面电荷调控与电吸附Cd^(2+)性能

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材料导报 2024年第6期38卷 18-25页

作者：覃玲霜刘醒邓立波深圳大学化学与环境工程学院广东深圳518055

电容去离子(CDI)是一种基于静电吸附的脱盐技术,由于其操作简便、能耗低、无二次污染等优点,有望用于冶金、电镀等行业所产生的废水中Cd^(2+)的去除。目前限制其发展的关键难题在于电极材料对Cd^(2+)的吸附容量较低。以葡萄糖为碳源,以... 详细信息

电容去离子(CDI)是一种基于静电吸附的脱盐技术,由于其操作简便、能耗低、无二次污染等优点,有望用于冶金、电镀等行业所产生的废水中Cd^(2+)的去除。目前限制其发展的关键难题在于电极材料对Cd^(2+)的吸附容量较低。以葡萄糖为碳源,以硫脲与硫粉为掺杂剂,通过高温碳化制备了S、N共掺杂的多孔碳材料。以所制备的碳材料为电极组装了CDI系统,测试了其电吸附Cd^(2+)的性能。以相同的电极材料组装的对称型CDI系统在1.2 V下对Cd^(2+)的吸附容量达到53 mg·g^(-1)。进一步研究发现,S、N掺杂使碳材料表面带有负电荷,因此,以其为阴极、电中性的商业活性炭YP-50F为阳极组装的非对称CDI系统的吸附容量达到88.37 mg·g^(-1),比对称体系高66.73%;而且经过七次吸-脱附循环后,容量保持率也由对称体系的62.2%提升至81.5%。通过XPS分析证明电极去除Cd^(2+)的机理为双电层与碳材料表面官能团络合的协同作用。本工作所开发的高性能多孔碳电极及非对称电极的匹配策略有望推动CDI技术在Cd^(2+)及其他重金属废水治理领域的应用。

关键词：电容去离子葡萄糖多孔碳镉离子表面电荷

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聚异丙基丙烯酰胺的热交联及纳米纤维的制备

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深圳大学学报（理工版） 2019年第3期36卷 324-330页

作者：李辉邓立波深圳大学化学与环境工程学院广东深圳518060

为制备具有良好稳定性与灵敏度的温敏纳米纤维,将异丙基丙烯酰胺(N-isopropylacrylamide,NIPAm)与羟甲基丙烯酰胺(N-methylol acrylamide,NMA)通过自由基共聚合方法合成了聚异丙基丙烯酰胺-羟甲基丙烯酰胺共聚物P(NIPAm-co-NMA).并利用... 详细信息

为制备具有良好稳定性与灵敏度的温敏纳米纤维,将异丙基丙烯酰胺(N-isopropylacrylamide,NIPAm)与羟甲基丙烯酰胺(N-methylol acrylamide,NMA)通过自由基共聚合方法合成了聚异丙基丙烯酰胺-羟甲基丙烯酰胺共聚物P(NIPAm-co-NMA).并利用NMA的自交联能力和热处理,提高了共聚物P(NIPAmco-NMA)的交联度和低临界溶解温度区间的抗溶解能力.采用静电纺丝方法将共聚物P(NIPAm-co-NMA)制备成纳米纤维,研究了纺丝工艺条件对纤维形貌与直径的影响,以及热处理温度与时间对纳米纤维交联程度与形貌保持能量的影响.结果表明,共聚物P(NIPAm-co-NMA)的最佳纺丝参数为:聚合物质量分数为10%,纺丝电压为10 k V.共聚物P(NIPAm-co-NMA)纤维的最佳热交联温度为130℃,热处理时间为6 h,所获得纤维的交联度为82%,热交联后纤维可在低温水溶液中保持稳定,循环加热-冷却5次后其质量仍可保持原来的98%.

关键词：高分子化学温敏纤维共聚合聚异丙基丙烯酰胺-羟甲基丙烯酰胺共聚物静电纺丝热交联

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