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A novel electrocatalytic current dominated self-powered photoelectrochemical sensor based on patterned bipolar electrode

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Analytica Chimica Acta 2025年 1361卷

作者： Yang, Weiqiang Ke, Jingru Xiao, Ziwang Song, Zhiping Chen, Xiaoping Wang, Qingxiang Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology Fujian Provincial Key Laboratory of Pollution Monitoring and Control College of Chemistry Chemical Engineering and Environment Minnan Normal University Zhangzhou363000 China

Background: Self-powered photoelectrochemical (sPEC) sensors display significant potential in clinical diagnosis and health evaluation. Until now, most of sPEC sensors rely on individual or dual photoelectrodes systems, which still suffer from drawbacks arising from cross-interference in real sample tests. Results: Herein, we combined the spatial isolation merit of a closed bipolar electrode (cBPE) with a self-powered photoelectrochemical method to develop a new-type of cBPE-sPEC sensor. Our results demonstrate that crystalline polymeric carbon nitride (CPCN) and Pt nanoparticles (Pt NPs) can be selectively deposited on a patterned carboxylated single-walled carbon nanotube (SWCNT) film to fabricate bipolar sensors via a vacuum filtration-assisted deposition technique. Under photoirradiation, the photoanode drives the electrocatalytic reactions at both ends of cBPE, forming a current loop, and the presence of H2O2 enhances the photocurrent response via an improved electrocatalytic current on cBPE. As proof of concept, the enzyme-based glucose sensor was developed to showcase the practicability of the cBPE-sPEC sensor. Significance and novelty: We believe that the new type photoelectrochemical sensing mechanism regulated by electrocatalytic current would facilitate the widespread application of cBPE-sPEC sensor in various biological analysis. © 2025 Elsevier B.V.

关键词： Photoelectric microscopes

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Impacts of dimethylamine emissions on particle number concentration and cloud condensation nuclei in Beijing

npj Clean Air

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npj Clean Air 2025年第1期1卷 1-9页

作者： Zhicheng Feng Lei Jiang Yanjie Qian Jianlin Hu Jianjiong Mao Dongjie Shang Song Guo Min Hu Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing 210044 China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University 100871 Beijing China

New particle formation (NPF) is a key source of atmospheric particles and cloud condensation nuclei (CCN). In polluted regions, the nucleation mechanism of sulfuric acid (H2SO4)-dimethylamine (DMA) is thought to play a crucial role in NPF. However, it still remains unclear about the sources of DMA and their contributions to regional particle number concentrations (PNC) and CCN. In this study, we incorporated the H2SO4-DMA nucleation mechanism into the aerosol module in the WRF-Chem model to improve the model’s simulation ability for NPF events. The default 8 size bins covering 39 nm to 10 μm were extended to 12 size bins ranging from 1 nm to 10 μm to better capture the formation and growth of the small particles. The modified model was applied to Beijing and its surrounding areas for an observation episode from March 1 to 18 in 2017. The results show that the revised model significantly improves its capability in simulating the particles number in the smaller size range (<20 nm), reducing the standardized bias from over 58% to 10%. The H2SO4-DMA nucleation mechanism contributes 46–78% of PNC in the surface layer (from the surface to ~300 m) and 22–36% of CCN at 0.5% supersaturation (CCN0.5%). The contributions to PNC and CCN0.5%are notably higher on NPF days than those on non-NPF days. High PNC zones correspond to areas with elevated CCN0.5%, suggesting that the nucleation process leads to increased CCN concentrations, and these regions also exhibit higher levels of H2SO4and DMA. Agricultural and residential activities were identified as the main sources of DMA in the study area. The contribution of residential DMA to PNC is particularly significant in urban Beijing, reaching up to 70%. This study enhances our understanding of how NPF events induced by H2SO4-DMA nucleation affect PNC and CCN in intensive anthropogenic emission regions.

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Insight into the critical factors determining the particle number concentrations during summer at a megacity in China

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Journal of Environmental Sciences 2019年第1期31卷 169-180页

作者： Baoshuang Liu Xiaohui Bi Jiaying Zhang Jie Yuan Zhimei Xiao Qili Dai Yinchang Feng Yufen Zhang State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control & Center for Urban Transport Emission Research College of Environmental Science and EngineeringNankai University Tianjin Environmental Monitoring Center

To identify the critical factors impacting the number concentration of particles with the aerodynamic diameters less than 2.5 μm(PNC_(2.5)), the continuous measurement of PNC_(2.5),chemical components in PM_(2.5), gaseous pollutants and meteorological conditions were conducted at an urban site in Tianjin in June 2015. Results indicated that the average PNC_(2.5) was 2839 ± 2430 d N/dlog Dp 1/cm^3 during the campaign. Compared to other meteorological parameters, the relative humidity(RH) had the strongest relationship with PNC_(2.5), with a Pearson's correlation coefficient of 0.53, and RH larger than 30% influenced strongly PNC_(2.5).The important influence of secondary reactions on PNC_(2.5) was inferred due to higher correlation coefficients between PNC_(2.5) and SO_4^(2-), NO_3^-, NH_4^+(r = 0.78–0.89; p < 0.01) and between PNC_(2.5) and ratios that represent the conversion of nitrogen and sulfur oxides to particulate matter(r = 0.42–0.49; p < 0.01). Under specific RH conditions, there were even stronger correlations between PNC_(2.5) and NO_3^-, SO_4^(2-), NH_4^+, while those between PNC_(2.5) and EC, OC were relatively weak, especially when RH exceeded 50%. Principal component analysis(PCA) and Pearson's correlation analysis indicated that secondary sources, vehicle emission and coal combustion might be major contributors to PNC_(2.5). Backward trajectory and potential source contribution function(PSCF) analysis suggested that the transport of air masses originated from these regions around Tianjin(Liaoning, Hebei, Shandong and Jiangsu) influenced critically PNC_(2.5). The north of Jiangsu, the west of Shandong, and the east of Hebei were distinguished as major potential source-areas of PNC_(2.5) by PSCF model.

关键词： Particle number concentration Correlation analysis Emission sources PSCF

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Catalyst–Support Interaction in Polyaniline‑Supported Ni_(3)Fe Oxide to Boost Oxygen Evolution Activities for Rechargeable Zn‑Air Batteries

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Nano-Micro Letters 2025年第1期17卷 176-190页

作者： Xiaohong Zou Qian Lu Mingcong Tang Jie Wu Kouer Zhang Wenzhi Li Yunxia Hu Xiaomin Xu Xiao Zhang Zongping Shao Liang An Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and TechnologyNanjing University of Information Science and TechnologyNanjing 210044People’s Republic of China Department of Chemistry The Chinese University of Hong KongMa Lin BuildingShatinHong Kong SAR 999077People’s Republic of China WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6102Australia Research Institute for Advanced Manufacturing The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China

Catalyst–support interaction plays a crucial role in improving the catalytic activity of oxygen evolution reaction(OER).Here we modulate the catalyst–support interaction in polyaniline-supported Ni_(3)Fe oxide(Ni_(3)Fe oxide/PANI)with a robust hetero-interface,which significantly improves oxygen evolution activities with an overpotential of 270 mV at 10 mA cm^(-2)and specific activity of 2.08 mA cm_(ECSA)^(-2)at overpotential of 300 mV,3.84-fold that of Ni_(3)Fe *** is revealed that the catalyst–support interaction between Ni_(3)Fe oxide and PANI support enhances the Ni–O covalency via the interfacial Ni–N bond,thus promoting the charge and mass transfer on Ni_(3)Fe *** the excellent activity and stability,rechargeable Zn-air batteries with optimum Ni_(3)Fe oxide/PANI are assembled,delivering a low charge voltage of 1.95 V to cycle for 400 h at 10 mA cm^(-2).The regulation of the effect of catalyst–support interaction on catalytic activity provides new possibilities for the future design of highly efficient OER catalysts.

关键词： Catalyst-support interaction Supported catalysts Heterointerface Oxygen evolution reaction Zn-air batteries

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Effect of sulfate on Cu(Ⅱ)sorption to polymer-supported nano-hydrated ferric oxides:Experimental and modeling studies

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Chinese Journal of Chemical Engineering 2021年第5期34卷 319-326页

作者： Wenxiang Ni Luyang Yang Xiaolin Zhang Hui Qiu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and PollutionControlSchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Incorporating of hydrous ferric oxide(HFO)inside porous supports with large sizes has become an effective way to decontaminate the water from heavy *** anions like sulfate are usually present in high concentrations in water,and might greatly affect adsorption behavior of hybrid ***,a polymer-based HFO-CPS was fabricated by encapsulating nano-HFO inside a chloromethylated polystyrene polymer(CPS)and the reactivity of HFO-CPS with Cu(Ⅱ)was evaluated in the presence of sulfate *** complexation theory was firstly employed to describe the effect of sulfate on Cu(Ⅱ)adsorption edges of hybrid HFO-CPS,where constant capacitance model(CCM)was *** available weak adsorption site Fe_((2))OH of hybrid HFO-CPS was found to decrease from 20% Fe to 5% Fe,which might be caused by the pore plugging effect after HFO *** the assumption that a ternary complex was formed,the effect of sulfate on Cu(Ⅱ)adsorption by HFO-CPS were successfully described by CCM using the optimized Fe_((2))OH site under different sulfate concentrations(1 or 10 mmol·L^(-1))and Cu/Fe ratios(0.0042 or 0.0252).It is confirmed that the formation of FeOHCuSO4 ternary surface complexes played an important role in enhancing Cu(Ⅱ)adsorption on HFO-CPS in the presence of sulfate.

关键词： Iron oxides Polymer Sulfate Adsorption Ternary complex

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Seasonal variations, temperature dependence, and sources of size-resolved PM components in Nanjing, east China

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Journal of Environmental Sciences 2022年第11期34卷 175-186页

作者： Mingjie Xie Wei Feng Shuyan He Qin’geng Wang Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlSchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Size-segregated ambient particulate matter(PM) samples were collected seasonally in suburban Nanjing of east China from 2016 to 2017 and chemically speciated. In both fine( 2.1 μm, PM>2.1) PM, organic carbon(OC) a... 详细信息

Size-segregated ambient particulate matter(PM) samples were collected seasonally in suburban Nanjing of east China from 2016 to 2017 and chemically speciated. In both fine(< 2.1μm, PM2.1) and coarse(> 2.1 μm, PM>2.1) PM, organic carbon(OC) accounted for the highest fractions(26.9% ± 10.9% and 23.1% ± 9.35%) of all measured species, and NO3-lead in average concentrations of water-soluble inorganic ions(WSIIs). The size distributions of measured components were parameterized using geometric mean diameter(GMD). GMD values of NO_(3)^(-), Cl^(-), OC, and PM for the whole size range varied from < 2.1 μm in winter to > 2.1μm in warm seasons, which was due to the fact that the size distributions of semi-volatile components(e.g., NH4NO3, NH4Cl, and OC) had a dependency on the ambient *** OC, elemental carbon(EC), and elements, NH_(4)^(+), NO_(3)^(-), and SO_(4)^(2-)exhibited an increase trend in GMD values with relative humidity, indicating that the hygroscopic growth might also play a role in driving seasonal changes of PM size distributions. Positive matrix factorization was performed using compositional data of fine and coarse particles, respectively. The secondary formation of inorganic salts contributing to the majority(> 70%) of fine PM and 20.2% ± 19.9% of speciated coarse PM. The remaining coarse PM content was attributed to a variety of dust sources. Considering that coarse and fine PM had comparable mass concentrations, more attention should be paid to local dust emissions in future air quality plans.

关键词： Particulate matter Size distribution Seasonal variation Semi-volatility Source apportionment

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The reconstruction of equal-mole bimetal organic framework to heterostructure for effective oxygen evolution reaction

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Journal of Materials Science & technology 2024年第36期203卷 118-125页

作者： Jinxia Yang Zhaoxia Hu Youlei Feng Zehua Zou Xiaoping Chen Qingxiang Wang Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology Fujian Provincial Key Laboratory of Pollution Monitoring and ControlCollege of ChemistryChemical Engineering and EnvironmentMinnan Normal UniversityZhangzhou363000China

Oxygen evolution reaction(OER)is one of the most important issues for hydrogen production from water *** the OER process,electrochemical reconstruction is widely observed for the majority of electrocatalysts,which is strongly related to the formation and evolution of real active ***,bimetal metal-organic framework(MOF)with an equal ratio of Co and Fe sites is screened to exhibit the superior OER *** obvious reconstruction is observed to transform single MOF phase into the heterostructure composed of active CoOOH and ***,the generation of Co^(3+)species is more reliant on the blessing of electricity and electrolyte than that of Fe3+*** a result,the optimal electrocatalyst shows the overpotential of 267 mV at 10 mA/cm^(2)and ultra-low Tafel slope of 24.7 mV/dec with a stable OER performance.

关键词： Oxygen evolution reaction Metal-organic frameworks Reconstruction Heterostructure

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The Influence of Freezing Drizzle on Wire Icing during Freezing Fog Events

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Advances in Atmospheric Sciences 2013年第4期30卷 1053-1069页

作者：周悦牛生杰吕晶晶 Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control School of Atmospheric Physics Nanjing University of Information Science and Technology Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research Institute of Heavy Rain China Meteorological Administration

Both direct and indirect effects of freezing drizzle on ice accretion were analyzed for ten freezing drizzle events during a comprehensive ice thickness, fog, and precipitation observation campaign carried out during the winter of 2008 and 2009 at Enshi Radar Station （30°17′N, 109°16′E）, Hubei Province, China. The growth rate of ice thickness was 0.85 mm h-1 during the freezing drizzle period, while the rate was only 0：4 mm h-1 without sleet and freezing drizzle. The rain intensity, liquid water content （LWC）, and diameter of freezing drizzle stayed at low values. The development of microphysical properties of fog was suppressed in the freezing drizzle period. A threshold diameter （Dc） was proposed to estimate the influence of freezing drizzle on different size ranges of fog droplets. Fog droplets with a diameter less than Dc would be affected slightly by freezing drizzle, while larger fog droplets would be affected significantly. Dc had a correlation with the average rain intensity, with a correlation coefficient of 0.78. The relationships among the microphysical properties of fog droplets were all positive when the effect of freezing drizzle was weak, while they became poor positive correlations, or even negative correlations during freezing drizzle period. The direct contribution of freezing drizzle to ice thickness was about 14.5%. Considering both the direct and indirect effects, we suggest that freezing drizzle could act as a ＂catalyst＂ causing serious icing conditions.

关键词： freezing drizzle freezing fog ice accretion microphysical property promoting factor

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Understand the local and regional contributions on air pollution from the view of human health impacts

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 133-143页

作者： Yueqi Jiang Jia Xing Shuxiao Wang Xing Chang Shuchang Liu Aijun Shi Baoxian Liu Shovan Kumar Sahu State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084China Beijing Municipal Research Institute of Environment Protection Beijing100037China Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Environmental Monitoring CenterBeijing100048China

The source-receptor matrix of PM_(2.5)concentration from local and regional sources in the Beijing-Tianjin-Hebei(BTH)and surrounding provinces has been created in previous ***,because the spatial distribution of concentration does not necessarily match with that of the population,such concentration-based source-receptor matrix may not fully reflect the importance of pollutant control effectiveness in reducing the PM_(2.5)-related health *** demonstrate that,we study the source-receptor matrix of the PM_(2.5)-related deaths instead,with inclusion of the spatial correlations between the concentrations and the *** advanced source apportionment numerical model combined with the integrated exposure-response functions is used for BTH and surrounding regions in *** observed that the relative contribution to PM_(2.5)-related deaths of local emissions was 0.75%to 20.77%larger than that of PM_(2.5)*** results address the importance of local emissions control for reducing health impacts of PM_(2.5)particularly for local *** of regional transport to PM_(2.5)-related deaths in rural area was 22%larger than that in urban area due to the spatial pattern of regional transport which was more related to the rural *** resulted in an environmental inequality in the sense that people staying in rural area with access to less educational resources are subjected to higher impacts from regional transport as compared with their more resourceful and knowledgeable urban *** unexpected benefit from the multi-regional joint controls is suggested for its effectiveness in reducing the regional transport of PM_(2.5)pollution thus mitigating the associated environmental inequality.

关键词： PM_(2.5) Regional transport Local emissions Health impact Environmental inequality

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An Optimization Model for the Regional Freight Structure

An Optimization Model for the Regional Freight Structure

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2023 International Conference on Smart transportation and City Engineering, STCE 2023

作者： Song, Yuanyuan Wang, Renjie Liu, Shengqiang Wu, Rui Transport Planning and Research Institute Ministry of Transport Beijing100028 China Laboratory of Transport Pollution Control and Monitoring Technology Beijing100028 China Beijing Jiaotong University Beijing100044 China

ISBN: (纸本)9781510673540

transport structure adjustment is an important means for collaborative emission reduction of greenhouse gases and conventional pollutants. In this paper, for the regional freight structure optimization, a multimodal freight network is built, the transport utility function is analyzed, a model for multi-objective regional freight structure optimization is built, Beijing-Tianjin-Hebei region is taken as an example, and the factors (e.g., the freight demand in the future years, the policy orientation for freight development, the development scales of various freight modes in the future) are taken as the constraint conditions to determine the feasible region of freight structure, build a model for multi-objective freight structure optimization with the minimum carbon emission and the maximum transport utility, and obtain the optimal freight structure in the year of carbon peaking and carbon neutrality goals, thus providing feasible ideas and methods for the sustainable development of the transport system. © 2024 SPIE.

关键词： Multiobjective optimization

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