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Nitrogen-doped carbon@TiO_(2) double-shelled hollow spheres as an electrochemical sensor for simultaneous determination of dopamine and paracetamol in human serum and saliva

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Journal of Pharmaceutical Analysis 2022年第3期12卷 436-445页

作者： Hui Yang Gongxun Cao Yongjun Huang Ye Lin Fengying Zheng Luxiu Lin Fengjiao Liu Shunxing Li College of Chemistry Chemical Engineering and EnvironmentMinnan Normal UniversityZhangzhouFujian363000China Fujian Provincial Key Laboratory of Pollution Monitoring and Control Minnan Normal UniversityZhangzhouFujian363000China Fujian Key Laboratory of Separation and Analysis Science and Technology ZhangzhouFujian363000China

As the most commonly used antipyretic and analgesic drug,paracetamol(PA)coexists with neurotransmitter dopamine(DA)in real biological samples.Their simultaneous determination is extremely important for human health,but they also interfere with each other.In order to improve the conductivity,adsorption affinity,sensitivity,and selectivity of TiO_(2)-based electrochemical sensor,N-doped carbon@-TiO_(2) double-shelled hollow sphere(HeC/N@TiO_(2))is designed and synthesized by simple alcoholic and hydrothermal method,using polystyrene sphere(PS)as a template.Meanwhile,TiO_(2) hollow spheres(H eTiO_(2))or N-doped carbon hollow spheres(HeC/N)are also prepared by the same method.HeC/N@TiO_(2) has good conductivity,charge separation,and the highly enhanced and stable current responses for the detection of PA and DA.The detection limit and linear range are 50.0 nmol/L and 0.3-50 mmol/L for PA,40.0 nmol/L and 0.3e50 mmol/L for DA,respectively,which are better than those of carbon-based sensors.Moreover,this electrochemical sensor,with high selectivity,strong anti-interference,high reliability,and long time durability,can be used for the simultaneous detection of PA and DA in human blood serum and saliva.The high electrochemical performance of HeC/N@TiO_(2) is attributed to the multifunctional combination of different layers,because of good conductivity,absorption and electrons transfer ability from in-situ N-doped carbon and electrocatalytic activity from TiO_(2).

关键词： Electrochemical sensor Simultaneous determination Paracetamol Dopamine

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D-band frontier: A new hydrogen evolution reaction activity descriptor of Pt single-atom catalysts

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Journal of Energy Chemistry 2022年第9期31卷 203-209,I0007页

作者： Guangming Zhan Yancai Yao fengjiao Quan Huayu Gu Xiao liu Lizhi Zhang Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Applied & Environmental Chemistry College of Chemistry Central China Normal UniversityWuhan 430079HubeiChina School of Environmental Science and Engineering Shanghai jiao Tong UniversityShanghai 200240China

Hydrogen evolution reaction(HER) is crucial for achieving sustainable development and carbon neutrality, and thus demands efficient catalysts, which necessitates fundamental theory to relieve trial-and-error experiment. To fast screen HER candidates, most studies focus on d-band center(ε)associated with the Gibbs energy of H* adsorption(ΔG). Unfortunately, εrule is not applicable to Pt single atoms on transition metal disulfides(Pt_(1)/TMDs) because of the additional contributions from p states of S atom. Here, we propose a new HER descriptor — d-band frontier(d) by defining the weight of d-band in the energy range of [-1.0 eV, 1.0 eV] of Pt single atoms. This dis exactly correlated with the ΔGof Pt_(1)/TMDs, and thus perfectly describes the structure–activity relationship, as validated by systematical experimental evidences. Moreover, this ddescriptor can be extended to Pt single atoms anchored on other supports(e.g., CN, C, MoO, and CoO), indicating its promising generality.

关键词： Hydrogen evolution reaction Single atoms Transition metal disulfides Descriptor

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Heat Exchanger Network Retrofit of Diesel Hydrotreating Unit Using Pinch Analysis

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China Petroleum Processing & Petrochemical Technology 2021年第2期23卷 34-43页

作者： Sun Mengying Zhang fengjiao liu Xinglong Sun Lanyi State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580

Diesel hydrotreating unit(DHT)is an integral part of the refinery,and its energy-saving optimization is of great significance to the enterprise.In this paper,process simulation software and energy management software are used to simulate the flowsheet and analyze the energy consumption,respectively.Stream data obtained from an existing DHT are applied in the pinch analysis for retrofitting the heat exchanger network(HEN)to achieve maximum energy utilization by using pinch analysis.Since DHT is constrained by pressure,the pressure factor is considered in the process of retrofitting.The results show that the amount of cross-pinch heat transfer is reduced,the inlet temperature of the furnace is increased by 55℃,and the amount of hot and cold utilities can be reduced by 70.25%and 50.16%,respectively.The economic evaluation indicates that the operating cost is saved by 4.39×10^(6)$/a,and the payback period is about 2 months.

关键词： pinch analysis pressure diesel hydrotreating unit heat exchanger network energy saving

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Climatological Characteristics of Summer Precipitation over East Asia Measured by TRMM PR:A Review

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Journal of Meteorological Research 2017年第1期31卷 142-159页

作者： Yunfei FU Xiao PAN Yuanjian YANG fengjiao CHEN Peng liu School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 Key Laboratory of Atmospheric Sciences and Satellite Remote Sensing of Anhui Province Anhui Institute of Meteorological Sciences Hefei 230031 Anhui Meteorological Information Centre Hefei 230031 Anhui Academy for Environmental Science Research Hefei 230071

Precipitation is an important indicator of climate change and a critical process in the hydrological cycle, on both the global and regional scales. Methods of precipitation observation and associated analyses are of strategic importance in global climate change research. As the first space-based radar, the Tropical Rainfall Measuring Mission （TRMM） Precipitation Radar （PR） has been in operation for almost 17 years and has acquired a huge amount of cloud and pre- cipitation data that provide a distinctive view to help expose the nature of cloud and precipitation in the tropics and subtropics. In this paper we review recent advances in summer East Asian precipitation climatology studies based on long-term TRMM PR measurements in the following three aspects：（1） the three-dimensional structure of precipita- tion, （2） the diurnal variation of precipitation, and （3） the recent precipitation trend. Additionally, some importantprospects regarding satellite remote sensing of precipitation and its application in the near future are discussed.

关键词： East Asia TRMM PR precipitation structure diurnal variation of precipitation precipitation trend

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Advances in organic thermoelectric materials and devices for smart applications

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SmartMat 2021年第4期2卷 426-445页

作者： Yue Zhao Liyao liu fengjiao Zhang Chong‐an Di Daoben Zhu School of Chemical Science University of Chinese Academy of SciencesBeijingChina Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijingChina

Organic thermoelectric(OTE)materials have been considered to be promising candidates for large area and low‐cost wearable devices owing to their tailorable molecular structure,intrinsic flexibility,and prominent solution processability.More importantly,OTE materials offer direct energy conversion from the human body,solid‐state cooling at low electric consumption,and diversified functions.Herein,we summarize recent developments of OTE materials and devices for smart applications.We first review the fundamentals of OTE materials from the viewpoint of thermoelectric performance,mechanical properties and bionic functions.Second,we describe OTE devices in flexible generators,photothermoelectric detectors,self‐powered sensors,and ultra‐thin cooling elements.Finally,we present the challenges and perspectives on OTE materials as well as devices in wearable electronics and fascinating applications in the Internet of Things.

关键词： flexible generators organic thermoelectric materials self‐powered sensors smart electronics thin‐film cooling

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Photocatalytic decompositions of gaseous HCHO and methylene blue with highly ordered TiO_2 nanotube arrays

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Journal of Energy Chemistry 2016年第4期25卷 740-746页

作者： Lixia Li Jing Ya fengjiao Hu Zhifeng liu Lei E School of Materials Science and Engineering Tianjin Chengjian University Automotive Interior Trim Tooling Center Beijing Research Institute of Mechanical & Electrical Technology

The highly ordered TiO2 nanotubes (NTs) were fabricated by the anodic oxidation method. Their morphology, structure and crystalline phase were characterized by scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The effects of morphology, specific surface area, pore structures and photo catalytic activity of the TiO2 NTs were investigated. UV-vis spectra analysis showed that its light absorption had been extended to the visible light range. The photocatalytic activity of the as-prepared samples was evaluated by photocatalytic oxidation of gaseous HCHO and MB aqueous solution. The samples had better adhesion strength in the dark and showed a higher photocatalytic activity than nanoparticles. Especially, with ultraviolet light pretreatment, the nanotubes exhibited more stable active for photocatalytic decomposition and the photodecomposition rate remained at high level after 3 cycles of the photocatalysis experiment. Thus, how the number of surface active group center dot OH increased and the mechanism for the great improvement for the photocatalytic activity are discussed. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

关键词： TiO2 nanotube arrays Photocatalysis Visible light Ultraviolet light pretreatment

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Microfluidics-based technologies for the analysis of extracellular vesicles at the single-cell level and single-vesicle level

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Chinese Chemical Letters 2022年第6期33卷 2893-2900页

作者： fengjiao Zhu Yahui Ji Jiu Deng Linmei Li Xue Bai Xianming liu Bingcheng Lin Yao Lu Department of Biotechnology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

Extracellular vesicles(EVs)are membrane vesicles secreted by cells,playing critical roles in mediating intercellular communications for various physiological and pathological processes.Most of the EV analysis is currently performed at the bulk level,obscuring the origin of the EVs and diverse characteristics of the individual extracellular vesicle.Technologies to analyze the extracellular vesicles at the single-cell and single-vesicle levels are needed to evaluate EV comprehensively and decode the heterogeneity underlying EV secretion.Microfluidic platforms that could control and manipulate fluids at the microscale provide an efficient way to achieve the aims.Various microfluidics-based technologies are emerging to realize single-cell EV secretion analysis and single EV analysis,which would be summarized in this mini-review.

关键词： Microfluidics Single-cell EV analysis Single EV analysis Extracellular vesicle Heterogeneity

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Electrostatic-multipole-based Force Fields for Coarse-grained Simulations of Protein

Electrostatic-multipole-based Force Fields for Coarse-graine...

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第十三届全国量子化学会议

作者： Min Li Fengjiao Liu John Zenghui Zhang School of Chemistry and Molecular Engineering and Department of Physics East China Normal University NYU-ECNU Center for Computational Chemistry at NYU Shanghai Department of Chemistry New York University

In present work, we proposed two generic electrostatic-multipole-based force fields for protein coarse-grained(CG) simulations, respectively, namely two-bead multipole force field(TMFF) and point-dipo

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Polyanionic hydrogel electrolyte enables reversible and durable Zn anode for efficient Zn-based energy storage

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Journal of Energy Chemistry 2023年第11期86卷 373-381,I0008页

作者： Chunjiang Jin Congcong Yang Hongyu Mi Chenchen Ji fengjiao Guo Chengzhe liu Ziqiang liu Nianjun Yang State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources School of Chemical Engineering and TechnologyXinjiang UniversityUrumqi 830017XinjiangChina Department of Chemistry Hasselt UniversityDiepenbeek 3590Belgium

Aqueous Zn-ion energy storage systems,which are expected to be integrated into intelligent electronics as a secure power supply,suffer poor reversibility of Zn anodes,predominantly associated with dendritic growth and side reactions.This study introduces a polyanionic strategy to address these formidable issues by developing a hydrogel electrolyte(PACXHE)with carboxyl groups.Notably,the carboxyl groups within the hydrogel structure establish favorable channels to promote the transport of Zn^(2+)ions.They also expedite the desolvation of hydrated Zn^(2+)ions,leading to enhanced deposition kinetics.Additionally,these functional groups confine interfacial planar diffusion and promote preferential deposition along the(002)plane of Zn,enabling a smooth surface texture of the Zn anode.This multifaceted regulation successfully achieves the suppression of Zn dendrites and side reactions,thereby enhancing the electrochemical reversibility and service life during plating/stripping cycles.Therefore,such an electrolyte demonstrates a high average Coulombic efficiency of 97.7%for 500 cycles in the Zn‖Cu cell and exceptional cyclability with a duration of 480 h at 1 mA cm^(-2)/1 mA h cm^(-2)in the Zn‖Zn cell.Beyond that,the Zn-ion hybrid micro-capacitor employing PACXHE exhibits satisfactory cycling stability,energy density,and practicality for energy storage in flexible,intelligent electronics.The present polyanionic-based hydrogel strategy and the development of PACXHE represent significant advancements in the design of hydrogel electrolytes,paving the way for a more sustainable and efficient future in the energy storage field.

关键词： Polyanionic hydrogel electrolyte Zinc anode issues Dendrite suppression Electrochemical performance Zinc-ionhybrid micro-capacitor

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重大传染病多渠道疫情信息发布模式的演化路径分析

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中国管理科学 2024年第4期32卷 237-249页

作者：陈凤娇刘德海东北财经大学公共管理学院辽宁大连116025

信息公开发布和回应群众关切是重大突发疫情防控工作的关键环节。本文总结了疫情信息不确定环境下的四种信息发布模式(联动模式、延迟模式、政府垄断模式、专家披露模式),构建政府部门和医疗专家多渠道信息发布的演化博弈模型。首先,通... 详细信息

信息公开发布和回应群众关切是重大突发疫情防控工作的关键环节。本文总结了疫情信息不确定环境下的四种信息发布模式(联动模式、延迟模式、政府垄断模式、专家披露模式),构建政府部门和医疗专家多渠道信息发布的演化博弈模型。首先,通过一次性同时博弈求解纳什均衡,分析短期内双方在各信息发布模式下的最佳努力水平和最佳收益。然后,双方在较长时期的不断调整信息发布策略,分析各疫情信息发布模式的演化路径与均衡条件。最后,结合中美两国疫情应对数据,分析相关系数对信息发布模式的演化影响。研究结果表明:政府部门对社会维稳短期收益和疫情防控长期收益的权衡是影响演化的关键因素。除联动模式外,信息发布还存在“政府垄断”“专家披露”等多条演化路径,但是,要避免陷入多重均衡或信息发布混乱导致的往复波动。通过减少抗疫投入成本、转变“内紧外松”工作方式、加强疫情信息监测预判等措施,可以有效促进政府部门与医疗专家协作,提高疫情信息发布的权威性、准确性和效率。

关键词：传染病疫情演化博弈应急管理信息发布模式突发公共卫生事件

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