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In Situ Coupling of Reduction and Oxidation Processes with Alternating Current-Driven Bioelectrodes for Efficient Mineralization of Refractory Pollutants

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engineering 2024年第12期43卷 125-138页

作者： Ye Yuan Junjie Zhang Wanxin Yin Lulu Zhang Lin Li Tianming Chen Cheng Ding Wenzong Liu Aijie Wang Fan Chen School of Environmental Science and Engineering Yancheng Institute of TechnologyYancheng 224051China School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen 518055China

The effective elimination of aromatic compounds from wastewater is imperative for safeguarding the ecological *** processes that combine cathodic reduction and anodic oxidation represent a promising approach for the biomineralization of aromatic ***,conventional direct current bioelectrochemical methods have intrinsic *** this study,a low-frequency and low-voltage alternating current(LFV-AC)-driven bioelectrode offering periodic in situ coupling of reduction and oxidation processes was developed for the biomineralization of aromatic compounds,as exemplified by the degradation of alizarin yellow R(AYR).LFV-AC stimulated biofilm demonstrated efficient bidirectional electron transfer and oxidation–reduction bifunctionality,considerably boosting AYR reduction(63.07%±1.91%)and subsequent mineralization of intermediate products(98.63%±0.37%).LFV-AC stimulation facilitated the assembly of a collaborative microbiome dedicated to AYR metabolism,characterized by an increased abundance of functional consortia proficient in azo dye reduction(Stenotrophomonas and Bradyrhizobium),aromatic intermediate oxidation(Sphingopyxis and Sphingomonas),and electron transfer(Geobacter and Pseudomonas).The collaborative microbiome demonstrated a notable enrichment of functional genes encoding azo-and nitro-reductases,catechol oxygenases,and redox mediator *** findings highlight the effectiveness of LFV-AC stimulation in boosting azo dye biomineralization,offering a novel and sustainable approach for the efficient removal of refractory organic pollutants from wastewater.

关键词： Alternating current Bioelectrode Redox process Bio-mineralization Electrode microbiome Refractory organic pollutants

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A novel photocatalytic mechanism of volatile organic compounds degradation on BaTiO_(3)under visible light:Photo-electrons transfer from photocatalyst to pollutant

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Chinese Chemical Letters 2025年第3期36卷 182-187页

作者： Teng Wang Jiachun Cao Juan Li Didi Li Zhimin Ao Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlKey Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of EducationInstitute of Environmental Health and Pollution ControlSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China Advanced Interdisciplinary Institute of Environment and Ecology Guangdong Provincial Key Laboratory of Wastewater Information Analysis and Early WarningBeijing Normal UniversityZhuhai 519087China

Wide bandgap semiconductors are typically activated under ultraviolet(UV)light irradiation for volatile organic compounds(VOCs)***,our previous study discovered that certain VOCs can interact with some wide bandgap semiconductors,formatting an intermediate bandgap between the VOCs and the conduction band of wide bandgap semiconductor,thus inducing visible light activation of the system,and photo-generated electrons are excited by visible light and transferred from the VOCs to the conduction band of *** this work,BaTiO_(3),traditionally is not active under visible light irradiation,however showed degradation rates of 100%and 20%for styrene and toluene under visible light,*** functional theory(DFT)calculations indicate that the adsorption of styrene or toluene on the BaTiO_(3)surface reduces its bandgap from 2.93 eV to 1.36 eV and 2.26 eV,*** intermediate bandgap in this system is primarily formed by the valence band of BaTiO_(3)and the VOCs,and indicating that photo-generated electrons directly transfer from BaTiO_(3)to the VOCs under visible light,inducing degradation reactions of VOCs,i.e.,this work discovered a new transfer pathway of photo-electrons direct from the valence band of BaTiO_(3)to VOCs,while photo-electrons are from VOCs to the conductive band of wide-bandgap semiconductors in our previous work.

关键词： Volatile organic compounds Photocatalytic Degradation Wide-bandgap semiconductors Density functional theory Degradation mechanism

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Envisioning Water-Resilient Cities Through the Lens of Blue-Green-Grey Solutions

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engineering 2024年第5期36卷 1-2页

作者： Nan-Qi Ren Glen Daigger School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China Department of Civil and Environmental Engineering University of MichiganAnn ArborMI 48109USA

Cities are dynamic systems,and the urban water systems within them can be evolved to provide water services to both humans and the environment while also enhancing the broader urban *** is done by embracing innovation and technological advancement while focusing on increased service to the human population and the local and broader *** the contemporary era,characterized by the rise of low-carbon and intelligent technologies,the swift pace of socioeconomic expansion highlights the critical need to address issues of urban water security and environmental *** escalating resource and environmental constraints,adopting holistic blue-green-grey strategies becomes imperative for the sustainable governance of urban water *** integrated approach is needed to navigate the intricate challenges of urban water dynamics while fostering enhanced ecological performance and resilience.

关键词： services urban advancement

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FPGA-based small-world spiking neural network with anti-interference ability under external noise

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Neural Computing and Applications 2024年第20期36卷 12505-12527页

作者： Guo, Lei Liu, Yongkang Wu, Youxi Xu, Guizhi Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering School of Health Sciences and Biomedical Engineering Hebei University of Technology Tianjin300131 China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin300131 China School of Artificial Intelligence Hebei University of Technology Tianjin300401 China

Neuromorphic hardware has become hotspot in the field of brain-like computing due to its advantages. However, the presence of external noise imposes challenges with respect to maintaining normal function of neuromorphic hardware. Biological brains have self-adaptability to external noise, meaning that a brain-like hardware with bio-plausibility can be expected to improve robustness. The purpose of this paper is to implement a highly fitted brain-like hardware with anti-interference ability (AIA) while preserving bio-plausibility. We propose a method of implementing a small-world spiking neural network (SWSNN) with bio-plausibility based on a field-programmable gate array (FPGA), in which the nodes are Izhikevich neuron modules, the edges are synaptic plasticity modules, and the topology is a small-world network. Then, the AIAs of the FPGA-based SNNs with different external noises are evaluated by two anti-interference indices. Further, taking a speech recognition task as the case study, the AIAs of these FPGA-based SNNs are verified in application. Finally, the AIA mechanism of the FPGA-based SNNs is discussed. Our results demonstrate that: (i) In the FPGA-based SWSNN, the FPGA-based Izhikevich neuron modules and the synaptic plasticity modules highly fit to the corresponding simulation results, and the topology conforms to the small-world property of human functional brain networks. (ii) Based on two anti-interference indices, the FPGA-based SWSNN outperforms the FPGA-based SNNs with other topologies, which is further verified by the speech recognition accuracy. (iii) Our discussions hint that the synaptic plasticity is intrinsic factor of the AIA, and the topology is a factor affecting the AIA. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.

关键词： Topology

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Two-dimensional Si photonic crystal waveguide branch for 850 nm and 950 nm wavelengths

Two-dimensional Si photonic crystal waveguide branch for 850...

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2023 Applied Optics and Photonics China: AI in Optics and Photonics, AOPC 2023

作者： Liu, Yuebo Huang, Yixiong Liao, Wenyuan Niu, Hao Yan, Jiahui Yang, Shaohua Ma, Teng Wang, Hongyue Lai, Canxiong Reliability Physics and Application Technology of Electronic Component Key Laboratory China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou511370 China

ISBN: (纸本)9781510672383

The waveguide branch plays an important role in integrated photonic circuits by dividing input light into two or more output lights, thereby facilitating optical power distribution and mode selection. Ordinary optical waveguides used in waveguide branches suffer from excessive optical loss and narrow branch angles, limiting their effectiveness in mode selection among other problems. Photonic crystals are constructed by arranging macroscopically homogeneous dielectric (or metallic) materials into periodic arrays, with carefully designed internal defects that provide them with frequency-selective and spatial properties. In this study, a silicon-based wide-angle waveguide branch composed of two-dimensional photonic crystals has been successfully created. The branch is capable of separating two wavelengths of light, namely 850 nm and 950 nm, by adjusting the positions of silicon cylinders in the two-dimensional photonic crystal with the purpose of optimizing optical power at different wavelengths. The silicon-based wide-angle waveguide branch is expected to be employed in multimode optical communication systems. Its utilization will contribute towards the reduction in size and complexity of integrated optical communication systems, while enhancing system reliability. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Photonic crystals

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Efficient extraction of phenol from wastewater by ionic micro-emulsion method:Anionic and cationic

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Chinese Journal of Chemical engineering 2023年第6期58卷 137-145页

作者： Chaobo Zhang Xiaoyong Yang Jian Dai Wenxia Liu Hang Yang Zhishan Bai State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China

Phenolic wastewater is one of the priorities in the field of wastewater treatment,which poses a serious threat to the human health and nature *** this paper,cationic cetyltrimethylammonium bromide(CTAB)and anionic sodium oleate(Na OL)microemulsions were utilized to extract phenol from the *** optimal extraction factors were investigated by exploring the effects of microemulsion composition ratio and extraction conditions on the phenol extraction ***,the enhanced extraction mechanism of phenol by cations microemulsions is illustrated by studying the extraction process of cationic and anionic microemulsions in the extraction of *** optimum components were obtained:surfactant concentration of 0.2 mol·L^(-1),isoamyl alcohol volume of 30%,internal aqueous phase concentration of CTAB microemulsion of 0.05 mol·L^(-1),and internal aqueous phase concentration of Na OL microemulsion of 0.09 mol·L^(-1).The extraction efficiencies were 96.44%and 82.0%when using CTAB and Na OL microemulsions under optimal conditions(water-emulsion ratio of 5,contact time of 9 min,extraction temperature of 298.15 K,and p H of 9),confirming the enhanced extraction of phenol by CTAB cationic *** was analyzed that the enhanced extraction of CTAB microemulsion was due to the electrostatic adsorption of cations with phenol root ions.

关键词： Phenol-containing wastewater Phenol recovery Microemulsion extraction Ionic microemulsion Mechanism analysis

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Effect of ternary transition metal sulfide FeNi_(2)S_(4)on hydrogen storage performance of MgH_(2)

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Journal of Magnesium and Alloys 2023年第8期11卷 2927-2938页

作者： Yaokun Fu Lu Zhang Yuan Li Sanyang Guo Han Yu Wenfeng Wang Kailiang Ren Wei Zhang Shumin Han State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

Hydrogen storage is a key link in hydrogen economy,where solid-state hydrogen storage is considered as the most promising approach because it can meet the requirement of high density and ***,magnesium-based materials(MgH_(2))are currently deemed as an attractive candidate due to the potentially high hydrogen storage density(7.6 wt%),however,the stable thermodynamics and slow kinetics limit the practical *** this study,we design a ternary transition metal sulfide FeNi_(2)S_(4)with a hollow balloon structure as a catalyst of MgH_(2)to address the above issues by constructing a MgH_(2)/Mg_(2)NiH_(4)-MgS/Fe ***,the dehydrogenation/hydrogenation of MgH_(2)has been significantly improved due to the synergistic catalysis of active species of Mg_(2)Ni/Mg_(2)NiH_(4),MgS and Fe originated from the MgH_(2)-FeNi_(2)S_(4)*** hydrogen absorption capacity of the MgH_(2)-FeNi_(2)S_(4)composite reaches to 4.02 wt%at 373 K for 1 h,a sharp contrast to the milled-MgH_(2)(0.67 wt%).In terms of dehydrogenation process,the initial dehydrogenation temperature of the composite is 80 K lower than that of the milled-MgH_(2),and the dehydrogenation activation energy decreases by 95.7 kJ·mol-1 compared with the milled-MgH_(2)(161.2 kJ·mol^(-1)).This method provides a new strategy for improving the dehydrogenation/hydrogenation performance of the MgH_(2)material.

关键词： Hydrogen storage materials Magnesium hydride FeNi_(2)S_(4) Hydrogen storage kinetics Catalysts

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Modulating electronic structure of nickel diselenide by vanadium doping toward highly efficient and stable bifunctional electrocatalysts for overall water splitting

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Journal of Materials Science & technology 2024年第20期187卷 63-71页

作者： Miaomiao Bai Taotao Ai Weiwei Bao Jie Han Junjun Zhang Qi Yu Jiangying Liu Xueling Wei Xiangyu Zou Liangliang Feng National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry&Chemical EngineeringNingxia UniversityYinchuan 750021China School of Materials Science&Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science&TechnologyXi’an 710021China

Designing low-cost and high-efficiency bifunctional electrocatalysts is one of the challenges in the clean production of hydrogen energy in electrochemical water *** metal selenides(TMSes)have been widely studied because of their low price,intrinsic metal properties,and high catalytic *** addition,the synergistic effect between bimetallic selenides exhibits better performance than monometallic selenides in the electrocatalytic ***,we synthesized V-doped NiSe2 nanowire arrays on pretreated nickel foam by a convenient two-step hydrothermal synthesis *** the al-kaline electrolyte,V-NiSe_(2)/NF exhibited excellent OER catalytic activity(293.6 mV@50 mA cm^(-2)).In ad-dition,the introduction of heteroatom V induces stronger electronic interactions between the structural atoms of the catalyst,altering the electronic structure and causing V-NiSe_(2)/NF to demonstrate excellent OER *** the long-term OER test,V-NiSe_(2)/NF was converted into NiOOH and SeO_(x)^(2-),which may be the“real”active species during catalytic reactions,and we also successfully captured the for-mation of intermediate NiOOH and selenite as active centers in the OER process through in-situ *** theoretical calculation shows that the electron transfer modulates the electron structure,changes the adsorption-desorption energy of the reaction intermediates,reduces the potential barrier of the rate-limiting step,and improves the OER *** V doping engineering strategy and the unique nanowire array structure make TMSes exhibit excellent OER *** study provides a new idea for the design of TMSe catalysts with excellent electrocatalytic performance.

关键词： Electrocatalysis Oxygen evolution reaction Vanadium doping Overall water splitting In-situ Raman Density functional theory

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Activation-induce d bowl-shape d nitrogen and oxygen dual-doped carbon material and its excellent supercapacitance

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Journal of Materials Science & technology 2023年第29期160卷 1-8页

作者： Junyan Wang Xinta Li Wanchun Guo Kesong Tian Jiamin Zhang Bosen Zhang Xueai Li Haiyan Wang Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse State Key Laboratory of Metastable Materials Science and TechnologySchool of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

Porous heteroatom-doped carbon materials exhibit promising electrochemical applications because of tunable porous structure and doping heteroatom-induced charge ***,it is still a great challenge to develop porous heteroatom-doped carbon materials with both high-content active heteroatom species and facilitated diffusion ***,we report a bowl-shaped nitrogen and oxygen dual-doping carbon(N,O-doped carbon)material based on low-temperature defluorination pyrolysis and alkali-etched activation of 3-fluorophenol-3-amino-4-hydroxypyridine-formaldehyde co-condensed resin and its excellent *** low-temperature thermal treatment strategy ensures high-content pyrrolic nitrogen(4.6 at.%)and oxygen species(15.9 at.%)to avoid high-temperature treatment-induced heteroatom loss and undesired configuration *** these processes,the defluorination pyrolysis promotes the transformation from the resin to carbon material to some extent,and KOH activation also promotes the ordered arrangement of 002 planes,which together assure the appropriate conductivity of the final microporous carbon *** importantly,KOH-etched activation partially removes an un-stable nano/microscale domain of the intermediate carbon microspheres to form a unique bowl-shaped structure extremely facilitating the diffusion of the substitutes and/or electrolyte *** expected,N,O-doped carbon material displays a remarkable specific capacitance of 486.4 F g^(−1)at 1 A g^(−1)with nitro-gen/oxygen species-dependant pseudocapacitance and good electrochemical durability.

关键词： N O-doped carbon Bowl-shaped structure Low-temperature pyrolysis Alkali activation Supercapacitance

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Vertically aligned montmorillonite aerogel-encapsulated polyethylene glycol with directional heat transfer paths for efficient solar thermal energy harvesting and storage

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 907-916页

作者： Qijing Guo Cong Guo Hao Yi Feifei Jia Shaoxian Song Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources Ministry of EducationWuhan University of TechnologyWuhan 430070China School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of TechnologyWuhan 430070China

The conversion and storage of photothermal energy using phase change materials(PCMs)represent an optimal approach for harnessing clean and sustainable solar ***,we encapsulated polyethylene glycol(PEG)in montmorillonite aerogels(3D-Mt)through vacuum impregnation to prepare 3D-Mt/PEG composite *** used as a support matrix,3D-Mt can effectively prevent PEG leakage and act as a flame-retardant barrier to reduce the flammability of ***,3D-Mt/PEG demonstrates outstanding shape retention,increased thermal energy storage density,and commendable thermal and chemical *** phase transition enthalpy of 3D-Mt/PEG can reach 167.53 J/g and remains stable even after 50 heating-cooling ***,the vertical sheet-like structure of 3D-Mt establishes directional heat transport channels,facilitating efficient phonon *** configuration results in highly anisotropic thermal conductivities that ensure swift thermal responses and efficient heat *** study addresses the shortcomings of PCMs,including the issues of leakage and inadequate flame *** achieves the development and design of 3D-Mt/PEG with ultrahigh strength,superior flame retardancy,and directional heat ***,this work offers a design strategy for the preparation of high-performance composite *** 3D-Mt/PEG with vertically aligned and well-ordered array structure developed in this research shows great potential for thermal management and photothermal conversion applications.

关键词： montmorillonite aerogel polyethylene glycol phase change materials solar thermal energy storage flame retardant

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