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Energy band engineering of graphitic carbon nitride for photocatalytic hydrogen peroxide production

Carbon Energy 2024年第11期6卷 346-370页

作者： Tengyang Gao Degui Zhao Saisai Yuan Ming Zheng Xianjuan Pu Liang Tang Zhendong Lei Key Laboratory of Organic Compound Pollution Control Engineering (MOE) School of Environmental and Chemical Engineering Shanghai UniversityShanghaiChina National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization Huaiyin Institute of TechnologyHuaianChina School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiangChina College of Environmental & Engineering Tongji UniversityShanghaiChina School of Materials Science and Engineering Nanyang Technological UniversitySin gaporeSingapore

Hydrogen peroxide(H_(2)O_(2))is one of the 100 most important chemicals in the world with high energy density and environmental *** with anthraquinone oxidation,direct synthesis of H_(2)O_(2) with hydrogen(H_(2))and oxygen(O_(2)),and electrochemical methods,photocatalysis has the characteristics of low energy consumption,easy operation and less pollution,and broad application prospects in H_(2)O_(2) *** photocatalysts,such as titanium dioxide(TiO_(2)),graphitic carbon nitride(g-C_(3)N_(4)),metal-organic materials,and nonmetallic materials,have been studied for H_(2)O_(2) *** them,g-C_(3)N_(4) materials,which are simple to synthesize and functionalize,have attracted wide *** electronic band structure of g-C_(3)N_(4) shows a bandgap of 2.77 eV,a valence band maximum of 1.44 V,and a conduction band minimum of−1.33 V,which theoretically meets the requirements for hydrogen peroxide *** comparison to semiconductor materials like TiO_(2)(3.2 eV),this material has a smaller bandgap,which results in a more efficient response to visible ***,the photocatalytic activity of g-C_(3)N_(4) and the yield of H_(2)O_(2) were severely inhibited by the electron-hole pair with high recombination rate,low utilization rate of visible light,and poor selectivity of *** previous reviews also presented various strategies to improve photocatalytic H_(2)O_(2) production,they did not systematically elaborate the inherent relationship between the control strategies and their energy band *** this point of view,this article focuses on energy band engineering and reviews the latest research progress of g-C_(3)N_(4) photocatalytic H_(2)O_(2) *** this basis,a strategy to improve the H_(2)O_(2) production by g-C_(3)N_(4) photocatalysis is proposed through morphology control,crystallinity and defect,and doping,combined with other materials and other ***,the challenges and prospect

关键词： energy band engineering graphitic carbon nitride hydrogen peroxide photocatalysis various strategies

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Impulsive Consensus of MASs With Input Saturation and DoS Attacks

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IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 414-424页

作者： Xuyang Wang Dengxiu Yu Xiaodi Li the Unmanned System Research Institute Northwestern Polytechnical University IEEE the School of Artificial Intelligence Optics and Electronics Northwestern Polytechnical University the School of Mathematics and Statistics Shandong Normal University the Center for Control and Engineering Computation Shandong Normal University

This paper investigates the secure impulsive consensus of Lipschitz-type nonlinear multi-agent systems(MASs) with input saturation. According to the coupling of input saturation and denial of service(DoS) attacks, impulsive control for MASs becomes extremely challenging. Considering general DoS attacks,this paper provides the sufficient conditions for the almost sure consensus of the MASs with input saturation, where the error system can achieve almost sure local exponential *** linear matrix inequalities(LMIs), the relation between the trajectory boundary and DoS attacks is characterized, and the trajectory boundary is estimated. Furthermore, an optimization method of the domain of attraction is proposed to maximize the size. And a non-conservative and practical boundary is proposed to characterize the effect of DoS attacks on MASs. Finally, considering a multi-agent system with typical Chua's circuit dynamic model, an example is provided to illustrate the theorems' correctness.

关键词： Almost sure consensus denial of service (DoS) attacks impulsive control input saturation

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The determinants of effective defluorination by the LiAl-LDHs

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Journal of Environmental sciences 2023年第4期126卷 153-162页

作者： Kaizhong Li Hui Liu Shuimei Li Qingzhu Li Shengtu Li Qingwei Wang School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410083China Water Pollution Control Technology Key Lab of Hunan Province Changsha 410004China

Millions of people in poor areas are still under the threat of fluoride *** to effectively separate fluorine in water is an important step to reduce the ecological *** this paper,we performed a systematic DFT calculation focused on the defluorination behavior between the LiAl-and *** results indicated that the LiAl-LDHs exhibited high chemical activity before the defluorination,because of the better electronic *** the defluorination,the LiAl-LDHs with adsorbed-F–were also more stable than the *** addition,the existence of coordination covalent bond for the adsorbed-F–attached to the LiAl-LDHs was *** is an important reason for the high defluorination efficiency by the *** addition,a series of weak interaction,including hydrogen bond and van der Waals interaction were also ***,a LiAl-LDHs with excellent fluoride removal properties were synthesized well by simple hydrothermal *** results showed that our synthesized LiAl-LDHs with the capacity of 156.09 mg/g,could be effectively defluorinated in ***,it surpasses most materials and has potential applications.

关键词： Efficient Defluorination Water treatment LDHs DFT

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Advancing Network Anomaly Detection: Comparative Analysis of Machine Learning Models

Advancing Network Anomaly Detection: Comparative Analysis of...

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International Conference on. Cryptology and Network Security with Machine Learning, ICCNSML 2023

作者： Pandey, Rashmikiran Pandey, Mrinal Nazarov, Alexey Department of Radio Engineering and Cybernetics Moscow Institute of Physics and Technology Moscow Russia Federal Research Center Computer Science and Control Russian Academy of Science Moscow Russia

ISBN: (纸本)9789819706402

In the rapidly evolving realm of cyber-security, the detection of network anomalies serves as a pivotal line of defense against a myriad of malicious activities and cyberthreats. This research undertakes the task of enhancing the accuracy and efficacy of network anomaly detection by employing a comparative analysis of various individual machine learning models. The study delves into the performance of distinct models, including Random Forest, Gradient Boosting, AdaBoost, neural networks, and SVM, meticulously scrutinizing their capabilities in detecting network anomalies. The crux of this study lies in its meticulous evaluation of each individual model on the revered NSL-KDD dataset—an established benchmark within the field of network intrusion detection. Through a systematic blend of rigorous mathematical frameworks, precise model implementations, and comprehensive experimental assessments, this research offers a deep understanding of the inner workings of each algorithm. The pivotal aspect of this study revolves around the comprehensive comparative analysis of these standalone models. Going beyond the mere quantifica-tion of accuracy, the exploration delves into aspects of precision, recall, F1-score, and more, shedding light on their diverse facets of performance. With achieved accuracies of 99.2419% for Random Forest, 99.5197% for Gradient Boosting, 86.6044% for AdaBoost, 84.00% for neural networks, and 87.00% for SVM, this research underlines the distinctive attributes and potential of each model in the context of network anomaly detection. As the study unravels the distinct strengths and limitations of each model, it contributes to the broader landscape of cyber-security by providing insights into the efficacy of individual machine learning approaches. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Support vector machines

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Application of phononic crystals in modern engineering vibration and noise control, a review

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Noise and Vibration Worldwide 2025年第4-5期56卷 224-241页

作者： Huang, Wei Xu, Jian Yao, Yi Zhang, Yongliang Wang, Xin Han, Pengbo SINOMACH Academy of Science and Technology Co. Ltd SINOMACH Research Center of Engineering Vibration Control Technology Beijing100080 China Beijing China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics University of Science and Technology of China Anhui China Key Laboratory of Vibration Control for Key Process Equipment of Major Scientific Infrastructure in the Machinery Industry Beijing China

Phononic crystals are composite materials consisting of periodically distributed inclusions, and this structure enables wave band gaps under specific conditions. This characteristic allows for the suppression of elastic waves within certain frequency ranges, offering a new approach to vibration reduction and noise control. In this study, phononic crystals, with their periodic structure, tunable bandgap properties, topology optimization, and additive manufacturing technology, are reviewed. Some key hot issues, such as low-frequency vibration and noise control, intelligent materials, and tunable bandgap design, are discussed. In the future, phononic crystals will play a significant role in barrier vibration isolation, rail transit vibration isolation, power equipment vibration isolation, precision equipment vibration isolation, noise control, and underground protection engineering. This study constitutes a systematic summary and outlook of phononic crystals in modern engineering vibration and noise control. © The Author(s) 2025.

关键词： Precision engineering

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The configuration of Au^(δ+)-ZrO_(2)^(δ−)species induced activation enhances electrocatalytic CO_(2)to formate conversion

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Nano research 2024年第7期17卷 6006-6015页

作者： Yongjian Jia Yadi Zhang Mengque Lin Yangyang Cheng Yanjie Xu National Engineering Research Center for Technology and Equipment of Environmental Deposition Lanzhou Jiaotong UniversityLanzhou 730070China Key Lab of Opt-Electronic Technology and Intelligent Control of Ministry of Education Lanzhou Jiaotong UniversityLanzhou 730070China School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023China

Electrochemical CO_(2)conversion into value-added chemicals is a promising technology to solve the greenhouse effect and recycle chemical ***,the electrochemical CO_(2)reduction reaction(e-CO_(2)RR)is seriously compromised by weak CO_(2)adsorption and a rough CO_(2)activation process based on the chemical inertness of the CO_(2)molecule and the formed fragile metal–C/O *** this paper,we designed and fabricated Au particles embedded in ZrO_(2).The configuration of Au particles being of positive charge and ZrO_(2)with negative charge is induced and generated by metal–support interactions(MSIs).As a result,Au/ZrO_(2)@C presents a big difference in the CO_(2)conversion compared with the known work,affording a formate yield of 112.5μmol·cm^(−2)·h^(−1)at−1.1 V *** hydrogen electrode(RHE),and a max formate Faradaic efficiency of up to 94.1%at−0.9 V *** superior performance was attributed to the activated Au–ZrO_(2)interface to form the Au^(δ+)*** insitu Fourier transform infrared(FTIR)spectroscopy and theoretical calculations show that the MSIs configuration can be inclined to the*OCO intermediate generation on Au^(δ+)species activating CO_(2)molecules and then accelerate the formation of the*OCHO intermediate in e-CO_(2)RR,thereby favoring the CO_(2)conversion to formate.

关键词： electrochemical CO_(2)reduction reaction(e-CO_(2)RR) Au_(δ+)species formic acid OCHO intermediate metal-support interactions

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Promotional effect of Cu additive for the selective catalytic oxidation of n-butylamine over CeZrO_(x)catalyst

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Chinese Chemical Letters 2022年第6期33卷 3065-3072页

作者： Xin Xing Ting Zhao Jie Cheng Xiaoxiao Duan Wenpeng Li Ganggang Li Zhongshen Zhang Zhengping Hao National Engineering Laboratory for VOCs Pollution Control Material&Technology Research Center for Environmental Material and Pollution Control TechnologyUniversity of Chinese Academy of SciencesBeijing 101408China College of Environmental Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

The catalytic elimination of nitrogen-containing volatile organic compounds(NVOCs)still encounters bottlenecks in NO_(x)formation and low N_(2)***,a series of Cu-promoted Ce-Zr mixed oxide catalysts were synthesized using a simple precipitation approach,and n-butylamine was adopted as the probe pollutant to evaluate their catalytic *** Ce Cu_(10%)ZrO_(x)catalyst exhibited the best catalytic activity,with 100%n-butylamine conversion and 90%N_(2)selectivity at 250℃.Concurrently,this sample also displayed good water resistance.A detailed characterization of the catalyst was performed through a series of experimental studies and theoretical *** addition of Cu increased the redox property and promoted the production of oxygen vacancies,all of which were favorable for the greatest nbutylamine selective catalytic oxidation *** changes of oxygen vacancies over Ce Cu_(10%)ZrO_(x)in reaction process were studied by in situ Raman ***,in situ diffuse reflectance infrared Fourier transform spectra(DRIFTs)and theoretical calculations were employed to explore the reaction mechanism of n-butylamine selective *** high activity and selectivity of this catalyst confirm the practical feasibility of the selective oxidation of n-butylamine to CO_(2)and N_(2),and the exploration of the reaction mechanism provides new insights into the further design of catalysts.

关键词： N-Butylamine CeCu_(a)ZrO_(x)mixed oxide Selective oxidation Oxygen vacancies Reaction mechanism

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In-situ forming ultra-mechanically sensitive materials for high-sensitivity stretchable fiber strain sensors

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National science Review 2024年第6期11卷 254-263页

作者： Rouhui Yu Changxian Wang Xiangheng Du Xiaowen Bai Yongzhong Tong Huifang Chen Xuemei Sun Jing Yang Naoji Matsuhisa Huisheng Peng Meifang Zhu Shaowu Pan State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University MOE Key Lab of Disaster Forecast and Control in Engineering School of Mechanics and Construction Engineering Jinan University State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Institute of Fiber Materials and Devices Fudan University Department of Cardiology Shanghai Xuhui Central HospitalZhongshan-Xuhui Hospital Fudan University Research Center for Advanced Science and Technology and Institute of Industrial Science The University of Tokyo

Fiber electronics with flexible and weavable features can be easily integrated into textiles for wearable applications. However, due to small sizes and curved surfaces of fiber materials, it remains challenging to load robust active layers, thus hindering production of high-sensitivity fiber strain sensors. Herein, functional sensing materials are firmly anchored on the fiber surface in-situ through a hydrolytic condensation *** anchoring sensing layer with robust interfacial adhesion is ultra-mechanically sensitive, which significantly improves the sensitivity of strain sensors due to the easy generation of microcracks during stretching. The resulting stretchable fiber sensors simultaneously possess an ultra-low strain detection limit of 0.05%, a high stretchability of 100%, and a high gauge factor of 433.6, giving 254-folds enhancement in sensitivity. Additionally, these fiber sensors are soft and lightweight, enabling them to be attached onto skin or woven into clothes for recording physiological signals, e.g. pulse wave velocity has been effectively obtained by them. As a demonstration, a fiber sensor-based wearable smart healthcare system is designed to monitor and transmit health status for timely intervention. This work presents an effective strategy for developing high-performance fiber strain sensors as well as other stretchable electronic devices.

关键词： fiber strain sensor stretchable wearable healthcare

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Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers

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Water science and engineering 2024年第2期17卷 150-156页

作者： Lin Hu Lin Chen Xian-kun Wu Rui Luo Rong-guan Lv Zheng-hao Fei Feng Yang School of Chemistry and Environmental Engineering Yancheng Teachers UniversityYancheng 224051China Jiangsu Province Engineering Research Center of Agriculural Breeding Pollution Control and Resource Yancheng 224051China Jiangsu Nanda Huaxing Science and Technology of Environmental Protection Co.Ltd. Yancheng 224001China

Removal of uranium(VI)from nuclear wastewater is urgent due to the global nuclear energy *** study synthesized novel sponge-like 3D porous materials for enhanced uranium adsorption by combining electrospinning and fibrous freeze-shaping *** materials possessed an organic-inorganic hybrid architecture based on the electrospun fibers of polyacrylonitrile(PAN)and SiO_(2).As a sup-porting material,the surface of fibrous SiO_(2) could be further functionalized by cyano groups via(3-cyanopropyl)*** the cyano groups were turned into amidoxime(AO)groups to obtain a amidoxime-functionalized sponge(PAO/SiO_(2)-AO)through the subsequent ami-doximation *** proposed sponge exhibited enhanced uranium adsorption performance with a high removal capacity of 367.12 mg/g,a large adsorption coefficient of 4.0×10^(4)mL/g,and a high removal efficiency of 97.59%.The UO_(2)^(2+)adsorption kinetics perfectly conformed to the pseudo-second-order *** sorbent also exhibited an excellent selectivity for UO_(2)^(2+) with other interfering metal ions.2023 Hohai *** and hosting by Elsevier B.V.

关键词： Uranium removal Sponge Amidoximation Organic-inorganic hybrid structure Electrospinning

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Enhancing corn stalk-based anaerobic digestion with different types of zero-valent iron added during the acidification stage:Performance and mechanism

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Journal of Environmental sciences 2024年第11期145卷 64-74页

作者： Xiang Liu Yue Liu Min Wang Qianzhen Deng Hao Yang College of Agricultural Science and Engineering Hohai UniversityNanjing 210098China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution Wenzhou UniversityWenzhou 325035China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Anhui Jianzhu UniversityHefei 230009China

Anaerobic digestion has been defined as a competitive approach to facilitate the recycling of corn ***,few studies have focused on the role of direct interspecies electron transfer(DIET)pathway in the acidification stage under the addition of different particle sizes of zero-valent iron(ZVI).In this study,three types of ZVI,namely iron filings,iron powder and nanoscale iron,were investigated,respectively,to enhance its high-value *** in volatile fatty acids(VFAs)and methane(CH4)production associated with the underlyingmechanisms were emphatically *** indicated that the addition of ZVI could increase the concentration of VFAs,with the most outstanding performance observed with the use of nanoscale ***,the conversion of propionic acid to acetic acid was driven by adding ZVI with no between-group differences in acidizing ***,the substrate was more fully utilized when supplied with iron powder compared with other groups in methanogenic phase,thereby displaying the maximumCH4 yield with a value of 263.1 mL/(g total solids(TS)).However,adding nanoscale iron could signally shorten the digestion time(T80),saving 7 days in comparison to the group of iron powder.

关键词： Zero-valent iron Corn stalk Anaerobic digestion Volatile fatty acids Methane

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