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Polar solvent induced in-situ self-assembly and oxygen vacancies on Bi_(2)MoO_(6)for enhanced photocatalytic degradation of tetracycline

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Nano Research 2024年第6期17卷 4951-4960页

作者： Fangyan liu Dongyue Su Weizhen liu Baiquan liu Chuan liu Hong Wang Mengye Wang State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275China School of Materials Sun Yat-Sen UniversityShenzhen 518107China School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and RecyclingSouth China University of TechnologyGuangzhou 510006China

It has been proved to be an effective route to efficiently ameliorate photocatalytic performance of catalysts via designing three-dimensional(3D)hierarchical nanostructures and constructing oxygen vacancies(VOs).However,controlling the self-assembly of organization into 3D hierarchical nanostructures while introducing VOs in photocatalysts remains a ***,we reported an ethylene glycol(EG)mediated approach to craft 3D hydrangea-structure Bi_(2)MoO_(6)with VOs for efficient photocatalytic degradation of *** manipulating the EG concentration during the fabrication process,the influence of EG concentration on the Bi_(2)MoO_(6)structure was systematically *** could promote the self-assembly of Bi_(2)MoO_(6)nanosheets to form a 3D hierarchical *** with 2D nanoplates,3D hierarchical architecture enhanced the surface area and the amount of active sites of Bi_(2)MoO_(6).In addition,the reduction effect of EG on metallic oxide enabled the generation of VOs in Bi_(2)MoO_(6).The VOs adjusted the electronic structure of Bi_(2)MoO_(6),which not only enhanced the light harvesting,but also facilitated the simultaneous utilization of photo-induced electrons and holes to form reactive oxygen species(·O2−and·OH)for the efficient tetracycline decomposition.3D Bi_(2)MoO_(6)hydrangea with VOs achieved a 79.4%removal efficiency of tetracycline after 75 *** work provides a simple yet robust EG-mediated strategy,which not only promotes the self-assembly of nano-catalysts into 3D hierarchical architectures,but also crafts tunable VOs for highly efficient photocatalysis.

关键词： three-dimensional(3D)hierarchical nanostructures tunable oxygen vacancies ethylene glycol(EG)-mediated strategy bismuth molybdate photocatalytic degradation tetracycline

素养立意的化学单元作业设计:内涵探析与实践进路

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课程．教材．教法 2024年第1期44卷 135-142页

作者：范梦怡刘鹂苏永平陕西师范大学教育学部西安710062 甘肃省兰州市教育科学研究所兰州730030

单元作业设计是响应“双减”作业管理要求、培育学科核心素养、实现“教、学、评”一致性的有效途径。素养立意的化学单元作业设计即教师以结构化单元为基点,依据化学学科核心素养目标,以多种形式统筹设计学习任务的专业活动。其强调“... 详细信息

单元作业设计是响应“双减”作业管理要求、培育学科核心素养、实现“教、学、评”一致性的有效途径。素养立意的化学单元作业设计即教师以结构化单元为基点,依据化学学科核心素养目标,以多种形式统筹设计学习任务的专业活动。其强调“整体—部分—整体”的建构方式,融思想性与技术性于一体,兼顾作业目标、内容、结构与评价等要素,共同构成相互促进、相互矫正的作业互动循环体系。遵循化学学习逻辑重构单元、“依标扣本”制订作业目标、搭建框架统整作业结构、依据命制技术设计作业内容、立足评价实现反思优化是其可行的实践进路。

关键词：核心素养单元作业作业设计

Thermal-hydraulic performance analysis and multi-objective optimization of a microchannel with staggered semi-elliptical ribs

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Science China Technological Sciences 2024年第10期67卷 3152-3167页

作者： CUI Pan liu Wei liu ZhiChun School of Energy and Power Engineering Huazhong University of Science and Technology

To enhance the cooling capacity of traditional microchannels for high heat flux electronic devices,a microchannel design with staggered semi-elliptical ribs is proposed in this *** numerical simulations,the flow characteristics of the designed microchannel are compared with those of a smooth one,and the effects of rib width（Wr）,rib height（Hr）,and rib length（Lr）,on the thermal-hydraulic performance are investigated under laminar flow *** results show that the periodically arranged ribs induce periodic vortices within the microchannel,effectively promoting fluid mixing and enhancing heat *** Hrhave similar effects on microchannel performance,with an increase in them leading to an enhanced thermal performance at the expense of deteriorated hydraulic ***,Lrhas a comparatively weaker influence,with both the heat transfer and flow resistance initially growing with increasing Lrand then *** strike a balance between the two performances,a multi-objective optimization on the three geometrical parameters is conducted at a Reynolds number（Re） *** with simulation data,artificial neural networks are trained as surrogate models,and a multi-objective genetic algorithm is employed to derive the Pareto *** the TOPSIS decision-making method,an optimal compromise solution is determined as Wr=0.2415 mm,Hr=0.0976 mm,and Lr=0.6486 *** testing on the optimized microchannel reveals that it exhibits high heat transfer,middle flow resistance,and excellent overall performance,with the performance evaluation criterion（PEC） falling between 1.572 and 1.723 within the Re range of 220–660.

关键词： heat transfer enhancement microchannel semi-elliptical rib numerical simulation multi-objective optimization

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In Silico Screening of Potential Inhibitors against dPLA2 from Named Chinese Herbs for Identification of Compounds with Antivenom Effects Due to Deinagkistrodon acutus Snake Bites

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American Journal of Molecular Biology 2024年第3期14卷 107-125页

作者： Xingyang Xiao mengyi Lai Zechang Rao Jianzhong Huang Yiwei Xie Hongbin Zhang Fuzhou Medical College of Nanchang University Fuzhou China Medical College Jinggangshan University Jian China

Phospholipase A2 (PLA2) is the key enzyme to the venom from Deinagkistrodon acutus which is one of the highly venomous snakes in China. In addition to being a catalyst for the hydrolysis of phospholipases A2 from snake venom, its well known that it possesses a broad spectrum of pharmacological activities, such as myotoxicity, neurotoxicity, cardiotoxicity, and hemolytic, anticoagulant and antiplatelet activities. However, snakebites are not efficiently treated by conventional serum therapy. Acute wounds can still cause poisoning and death. In order to find effective inhibitors of Deinagkistrodon venom acid phospholipase A2 (dPLA2), we obtained 385 compounds in 9 Chinese herbs from the TCMSP. These compounds were further performed to virtual screen using in silico tools like ADMET analysis, molecular docking and molecular dynamics (MD) simulation. After Pharmacokinetics analysis, we found 7 candidate compounds. Besides, analysis of small molecule interactions with dPLA2 confirmed that the amino acid residues HIS47 and GLY29 are key targets. Because they bind not only to the natural substrate phosphatidylcholine and compounds known for having inhibitory functions, but also for combining with potential antidote molecules in Chinese herbal medicine. This study is the first to report experience with virtual screening for possible inhibitor of dPLA2, such as the interaction spatial structure, binding energy and binding interaction analysis, these experiences not only provide reference for further experimental research, but also have a guideline for the study of drug molecular mechanism of action.

关键词： Chinese Herbal Medicine Phospholipase A2 Inhibitor Molecular Docking Molecular Mechanism

基于网络重构和电热联合需求响应的配电网安全经济调度

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电力建设 2019年第4期40卷 90-97页

作者：王雅丽刘洪赵娟郭玥张成昊韩长占刘梦怡国家电网有限公司北京市100031 智能电网教育部重点实验室(天津大学) 天津市300072 国网经济技术研究院有限公司北京市102209 国网河北省电力有限公司石家庄市056004

随着电网中电热等多类型负荷的持续增长,仅通过电负荷需求响应或网络重构等传统的单一调度手段无法满足配电网安全经济运行的需要。为此,文章提出了一种综合考虑网络重构与终端用户电热联合需求响应的配电网安全经济调度方法。首先,构... 详细信息

随着电网中电热等多类型负荷的持续增长,仅通过电负荷需求响应或网络重构等传统的单一调度手段无法满足配电网安全经济运行的需要。为此,文章提出了一种综合考虑网络重构与终端用户电热联合需求响应的配电网安全经济调度方法。首先,构建了考虑用户响应能力及满意度的电负荷需求响应模型;其次,构建了电热耦合系统中不同元件的出力模型,并提出了基于峰谷电价的热负荷需求响应策略;再次,建立了以一天内配电网运行成本最小为目标,统筹多时段网络重构与电热综合需求响应的配电网安全经济调度模型;最后,通过算例验证了所提模型和方法的有效性与实用性。

关键词：电热耦合系统需求响应配电网重构经济调度

碳纳米管/四氧化三铁复合分散电极对蒽醌染料的脱色研究

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化工新型材料 2021年第11期49卷 217-221页

作者：刘梦怡李梦娟葛明桥江南大学生态纺织教育部重点实验室无锡214122 江南大学纺织科学与工程学院无锡214122

以溶剂热法制备了一种多壁碳纳米管-四氧化三铁(MWCNT-Fe_(3)O_(4))复合材料,并以此作为分散电极,制备了三维电催化氧化电解池,对蒽醌染料分散蓝2BLN进行脱色。通过透射电镜(TEM)、X射线衍射仪(XRD)、傅里叶红外(FT-IR)对MWCNT-Fe_(3)O_... 详细信息

以溶剂热法制备了一种多壁碳纳米管-四氧化三铁(MWCNT-Fe_(3)O_(4))复合材料,并以此作为分散电极,制备了三维电催化氧化电解池,对蒽醌染料分散蓝2BLN进行脱色。通过透射电镜(TEM)、X射线衍射仪(XRD)、傅里叶红外(FT-IR)对MWCNT-Fe_(3)O_(4)复合材料进行相组成、形貌及结构分析表征;以分散蓝2BLN的脱色率作为评定标准设计正交试验,通过极差和方差分析探讨电压、电解盐浓度和催化剂用量对脱色率的影响规律;探讨分别以MWCNT-Fe_(3)O_(4)、MWCNT和Fe_(3)O_(4)作为附加电极时,对染料脱色率的影响。结果表明:各因素对脱色率的影响程度由大到小依次为电压、电解盐浓度和催化剂用量;以MWCNT-Fe_(3)O_(4)作为附加电极,在电压为17V,电解盐浓度为1mol/L,催化剂用量为75mg/L的条件下,对分散蓝2BLN脱色,3h后脱色率可达到98.79%。

关键词：脱色蒽醌染料电催化氧化分散电极碳纳米管/四氧化三铁复合材料

Revealing the role of electrode potential micro-environments in single Mn atoms for carbon dioxide and oxygen electrolysis

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Nano Research 2024年第9期17卷 7957-7966页

作者： Pengcheng liu anyi liu Kaili Wang Shuai Shi Mengmeng Jin Jingxiu liu Tao Qin Qian liu Xijun liu Jia He Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringInstitute of New-Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Chemistry and Chemical Engineering and Environmental Engineering Weifang UniversityWeifang 261061China Department of Electrical Engineering and Automation Luoyang Institute of Science and TechnologyLuoyang 471023China Institute for Advanced Study Chengdu UniversityChengdu 610106China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China

Elucidation the relationship between electrode potentials and heterogeneous electrocatalytic reactions has attracted widespread *** we construct the well-defined Mn single-atom(MnSA)catalyst with four N-coordination through a simple thermal pyrolysis preparation method to investigate the electrode potential micro-environments effect on carbon dioxide reduction reactions(CO_(2)RR)and oxygen reduction reactions(ORR).MnSA catalysts generate higher CO production Faradaic efficiency of exceeding 90%at-0.9 V for CO_(2)RR and higher H_(2)O_(2)yield from 0.1 to 0.6 V with excellent ORR *** functional theory(DFT)calculations based on constant potential models were performed to study the mechanism of MnSA on CO_(2)*** thermodynamic energy barrier of CO_(2)RR is lowest at-0.9 V *** hydrogen electrode(RHE).Similar DFT calculations on the H_(2)O_(2)yield of ORR showed that the H_(2)O_(2)yield at 0.2 V was *** study provides a reasonable explanation for the role of electrode potential micro-environments.

关键词： electrode potential micro-environments Mn single-atom catalyst carbon dioxide reduction reaction oxygen reduction reaction constant potential models

Recurrent Neural Network Inspired Finite-Time Control Design

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1527-1529页

作者： Jianan liu Shihua Li Rongjie liu School of Automation Southeast UniversityNanjing 210096China Department of Statistics Florida State UniversityFL 32304 USA IEEE

Dear Editor,This letter is concerned with the role of recurrent neural networks(RNNs)on the controller design for a class of nonlinear *** by the architectures of RNNs,the system states are stacked according to the dynamic along with time while the controller is represented as the neural network *** build the bridge between RNNs and finite-time controller,a novel activation function is imposed on RNNs to drive the convergence of states at finite-time and propel the overall control process *** stability proof is briefly provided for the convergence of the proposed finite-time *** last,a numerical simulation example is presented to illustrate the efficiency of the proposed *** networks can be classified as static(feedforward)and dynamic(recurrent)nets[1].The former nets do not perform well in dealing with training data and using any information of the local data structure[2].In contrast to the feedforward neural networks,RNNs are constituted by high dimensional hidden states with dynamics.

关键词： dynamics finite proof

Experimental and numerical study on ignition and combustion characteristics of boron-magnesium composite powders

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Particuology 2024年第1期84卷 12-29页

作者： Shuyuan liu Luyang Han Hongmei liu Yingkai Song Linlin liu Songqi Hu Science and Technology on Combustion Internal Flow and Thermo-Structure LaboratoryNorthwestern Polytechnical UniversityXi'an710072China School of Mechanical Engineering and Rail Transit Changzhou UniversityChangzhou213164China Shanghai Institute of Space Propulsion Shanghai201112China Shanghai Engineering Research Center of Space Engine Shanghai201112China

A high-pressure laser ignition and combustion system with adjustable oxidizer gas atmosphere is established to investigate the ignition and combustion characteristics of boron-magnesium(BM)com-posite *** ignition and combustion model of BM powders is established and validated in the present *** results show that increasing water content,O_(2) content and Mg content all result in shorter ignition delay time of BM powders,among which the effect of water content is the most ***,ignition delay time increases as pressure *** combustion time decreases with increasing Mg content and ambient pressure but increases with water *** the increase of O_(2) content,combustion time of BM powders first increases and then decreases,which means a critical O_(2) content exists above which combustion time *** results show that there exists a trade-off between ignition and combustion performance of BM composite powders.

关键词： Boron magnesium powder Laser ignition Ignition and combustion model Reaction mechanism Numerical model