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Journal of Environmental Sciences 2024年第6期140卷 157-164页

作者： Xiaofeng Cui Xueting Wang Lijun Zhao Jixin Wang Tingting Kong yujie xiong Anhui Engineering Research Center of Carbon Neutrality The Key Laboratory of Functional Molecular SolidsMinistry of EducationAnhui Laboratory of Molecular-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China School of Chemistry and Chemical Engineering Anqing Normal UniversityAnqing 246011China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China

Homogenous molecular photocatalysts for CO_(2)reduction,especially metal complex-based photosensitizer-catalyst assemblages,have been attracting extensive research interests due to their efficiency and ***,their low durability and recyclability limit practical *** this work,we immobilized the catalysts of metal terpyridyl complexes and the photosensitizer of[Ru(bpy)3]Cl2onto the surface of carbon nanotubes through covalent bonds and electrostatic interactions,respectively,transforming the homogeneous system into a heterogeneous *** characterizations prove that these metal complexes are well dispersed on CNTs with a high loading(ca.12 wt.%).Photocatalytic measurements reveal that catalytic activity is remarkably enhanced when the molecular catalysts are anchored,which is three times higher than that of homogeneous molecular ***,when the photosensitizer of[Ru(bpy)3]Cl2is immobilized,the side reaction of hydrogen evolution is completely suppressed and the selectivity for CO production reaches 100%,with its durability also significantly *** work provides an effective pathway for constructing heterogeneous photocatalysts based on rational assembly of efficient molecular photosensitizers and catalysts.

关键词： durability selectivity catalyst

Integration of Green Hydrogen Production and Storage via Electrocatalysis

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Precision Chemistry 2024年第6期2卷 229-238页

作者： Chao Zhang Jingxiang Low yujie xiong Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Precision and Intelligent ChemistrySchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui 230026China

Hydrogen economy,which proposes employing hydrogen to replace or supplement the current fossil-fuel-based energy economy system,is widely accepted as the future energy scheme for the sustainable and green development of human *** the hydrogen economy has shown tremendous potential,the associated challenges with hydrogen production and storage remain significant barriers to wide *** light of this consideration,the integration of green hydrogen production and storage through electrocatalysis for direct production of chemical hydrogen storage media has emerged as a potential solution to these ***,through electrocatalysis,CO_(2) and H_(2)O can be converted into methanol or formic acid,while N_(2) or NOx along with H_(2)O can be transformed into ammonia,streamlining the hydrogen economy *** this Perspective,we provide an overview of recent developments in this ***,we briefly discuss the general properties and corresponding production strategies via the electrolysis of these chemical hydrogen storage ***,we conclude by offering insights into future perspectives in this field,anticipating that the successful advancement of such technology will propel the development of the hydrogen economy toward practical implementation.

关键词： Hydrogen economy Electrocatalysis Methanol Formic acid Ammonia

Sustainable all-weather CO2 utilization by mimicking natural photosynthesis in a single material

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National Science Review 2024年第2期11卷 177-187页

作者： Xianjin Shi Yu Huang Ran Long Zhenyu Wang Liqin Wang Junji Cao Gangqiang Zhu yujie xiong State Key Laboratory of Loess and Quaternary Geology(SKLLQG) Key Laboratory of Aerosol Chemistry and Physics Institute of Earth EnvironmentChinese Academy of Sciences Center of Excellence in Quaternary Science and Global Change Chinese Academy of Sciences University of Chinese Academy of Sciences Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science and National Synchrotron Radiation Laboratory University of Science and Technology of China Institute of Atmospheric Physics Chinese Academy of Sciences School of Physics and Information Technology Shaanxi Normal University

Solar-driven CO2conversion into hydrocarbon fuels is a sustainable approach to synchronously alleviating the energy crisis and achieving net ***,the dependence of the conversion process on solar illumination hinders its practical application due to the intermittent availability of sunlight at night and on cloudy or rainy ***,we report a model material of Pt-loaded hexagonal tungsten trioxide（Pt/h-WO3） for decoupling light and dark reaction processes,demonstrating the sustainable CO2conversion under dark conditions for the first *** such a material system,hydrogen atoms can be produced by photocatalytic water splitting under solar illumination,stored together with electrons in the h-WO3through the transition of W6+to W5+and spontaneously released to trigger catalytic CO2reduction under dark ***,we demonstrate using natural light that CH4production can persist at night and on rainy days,proving the accomplishment of all-weather CO2conversion via a sustainable way.

关键词： sustainable CO2 utilization artificial photosynthesis all-weather application charge storage

Tuning the local coordination environment of silver(Ⅰ) coordination networks with counterions for enhanced electrocatalytic CO_(2) reduction

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Science China Chemistry 2024年第5期67卷 1524-1530页

作者： Xiaofeng Cui Xueting Wang Cong Fu Bing Liu Mei-Yan Gao Tingting Kong yujie xiong Anhui Engineering Research Center of Carbon Neutrality The Key Laboratory of Functional Molecular SolidsMinistry of EducationAnhui Laboratory of Molecular-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China Department of Chemical Sciences Bernal InstituteUniversity of LimerickLimerick V94 T9PXRepublic of Ireland School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China

Very recently, the local coordination environment of active sites has been found to strongly influence their performance in electrocatalytic CO_(2) reduction by tuning the intrinsic kinetics of CO_(2) activation and intermediate stabilization. It is imperative to elucidate the mechanism for such an influence towards the rational design of efficient catalysts;however, the complex interactions between the multiple factors involved in the system make it challenging to establish a clear structure–performance relationship. In this work, we chose ion-intercalated silver(I)-based coordination networks(AgCNs) with a well-defined structure as a model platform, which enables us to understand the regulation mechanism of counterions as the counterions are the only tuning factor involved in such a system. We prepared two isostructural Ag CNs with different intercalation ions or counterions of BF_(4)^(-) and ClO_(4)^(-)(named as AgCNs-BF_(4) and AgCNs-ClO_(4)) and found that the former has a more competitive CO_(2) electroreduction performance than the latter. AgCNs-BF_(4) achieves the highest Faradaic efficiency for CO_(2) to CO of 87.1% at-1.0 V(vs. RHE) with a higher partial current density, while AgCNs-ClO_(4) exhibits only 77.2% at the same applied *** characterizations and theoretical calculation reveal that the presence of BF_(4)^(-)is more favorable for stabilizing the COOH^(*) intermediate by weakening hydrogen bonds, which accounts for the superior activity of Ag CNs-BF_(4).

关键词： electrocatalytic CO_(2) reduction coordination networks local environment counterions intercalation ions

Few-Shot Named Entity Recognition with the Integration of Spatial Features

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Wuhan University Journal of Natural Sciences 2024年第2期29卷 125-133页

作者： LIU Zhiwei HUANG Bo XIA Chunming xiong yujie ZANG Zhensen ZHANG Yongqiang College of Electrical and Electronic Engineering Shanghai University of Engineering ScienceShanghai 201620China Shanghai Zhongyu Academy of Industrial Internet Shanghai 201620China AIoT Manufacturing Solutions Technology Co. Ltd.Hefei 230000AnhuiChina

The few-shot named entity recognition(NER)task aims to train a robust model in the source domain and transfer it to the target domain with very few annotated ***,some approaches rely on the prototypical network for ***,these approaches often overlook the spatial relations in the span boundary matrix because entity words tend to depend more on adjacent *** propose using a multidimensional convolution module to address this limitation to capture short-distance spatial ***,we uti-lize an improved prototypical network and assign different weights to different samples that belong to the same class,thereby enhancing the performance of the few-shot NER *** experimental analysis demonstrates that our approach has significantly improved over baseline models across multiple datasets.

关键词： named entity recognition prototypical network spatial relation multidimensional convolution

Coupling of BiOCl Ultrathin Nanosheets with Carbon Quantum Dots for Enhanced Photocatalytic Performance

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Transactions of Tianjin University 2024年第3期30卷 211-220页

作者： Pin Song Xiaoyu Fang Wei Jiang Yuyang Cao Daobin Liu Shiqiang Wei Jun Du Lang Sun Lei Zhao Song Liu Yuzhu Zhou Jun Di Chade Lv Bijun Tang Jiefu Yang Tingting Kong yujie xiong Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Engineering Research Center of Carbon NeutralityCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241000China National Synchrotron Radiation Laboratory CAS Center for Excellence in NanoscienceSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230029China School of Chemistry and Chemical Engineering National Special Superfi ne Powder Engineering Research CenterNanjing University of Science and TechnologyNanjing 210094China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China School of Materials Science&Engineering Nanyang Technological UniversitySingapore 639798Singapore

Over the past few decades,photocatalysis technology has received extensive attention because of its potential to mitigate or solve energy and environmental pollution *** novel materials with outstanding photocatalytic activities has become a research hotspot in this *** this study,we prepared a series of photocatalysts in which BiOCl nanosheets were modified with carbon quantum dots(CQDs)to form CQDs/BiOCl composites by using a simple solvothermal *** photocatalytic performance of the resulting CQDs/BiOCl composite photocatalysts was assessed by rhodamine B and tetracycline degradation under visible-light *** with bare BiOCl,the photocatalytic activity of the CQDs/BiOCl composites was significantly enhanced,and the 5 wt%CQDs/BiOCl composite exhibited the highest photocatalytic activity with a degradation efficiency of 94.5%after 30 min of ***,photocatalytic N_(2)reduction performance was significantly improved after introducing *** 5 wt%CQDs/BiOCl composite displayed the highest photocatalytic N_(2)reduction performance to yield NH_3(346.25μmol/(g h)),which is significantly higher than those of 3 wt%CQDs/BiOCl(256.04μmol/(g h)),7 wt%CQDs/BiOCl(254.07μmol/(g h)),and bare BiOCl(240.19μmol/(g h)).Our systematic characterizations revealed that the key role of CQDs in improving photocatalytic performance is due to their increased light harvesting capacity,remarkable electron transfer ability,and higher photocatalytic activity sites.

关键词： Carbon quantum dots BiOCl Rhodamine B Tetracycline Photocatalysis

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基于频繁模式挖掘算法的中医问诊策略研究

世界科学技术-中医药现代化 2024年第6期26卷 1608-1617页

作者：李瑞珍夏春明王忆勤许朝霞熊玉洁西北工业大学民航学院华东理工大学机械与动力工程学院上海工程技术大学电子电气工程学院上海中医药大学上海市健康辨识与评估重点实验室/中医四诊信息化实验室

目的研究中医问诊策略，实现快速捕捉患者的关键病情信息，推进中医问诊客观化的发展。方法采用基于关联分析中频繁模式挖掘算法的症状提问模型，并使用交叉合并的方法建立中医单系统症状提问与多系统综合症状提问的中医症状问诊策略... 详细信息

目的研究中医问诊策略，实现快速捕捉患者的关键病情信息，推进中医问诊客观化的发展。方法采用基于关联分析中频繁模式挖掘算法的症状提问模型，并使用交叉合并的方法建立中医单系统症状提问与多系统综合症状提问的中医症状问诊策略，达到通过最短的时间、最高的效率来获取到患者关键病情信息。结果实现了从单系统问诊到五系统综合问诊的突破，通过单系统与五系统两种症状提问模式实现了高效获取患者病情信息的过程，且对比传统量表提问方式，系统减少了65%的提问次数就可获取到患者92%的症状信息，大大提高了对患者症状信息获取的效率。结论在两种不同的症状提问模式下，打破了中医基于量表来询问患者的传统问诊模式，缩短了对患者症状获取的时间，简化了问诊流程，减少了由于经验不足或人为主观造成的差异，能够用于中医临床辅助诊断中。

关键词：中医问诊频繁模式挖掘算法症状关联性问诊策略

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两阶段问答范式的生物医学事件触发词检测

计算机工程与应用 2024年第10期60卷 121-131页

作者：行帅熊玉洁苏前敏黄继汉上海工程技术大学电子电气工程学院上海201620 上海中医药大学药物临床研究中心上海201203

现有的生物医学事件触发词检测存在以下缺陷:保留了与触发词无关的冗余信息;忽略了实体与事件之间的潜在关联性;传统方法容易受到数据稀缺性的影响。针对上述问题,提出了一种两阶段问答范式的生物医学事件触发词检测方法。在事件类型识... 详细信息

现有的生物医学事件触发词检测存在以下缺陷:保留了与触发词无关的冗余信息;忽略了实体与事件之间的潜在关联性;传统方法容易受到数据稀缺性的影响。针对上述问题,提出了一种两阶段问答范式的生物医学事件触发词检测方法。在事件类型识别阶段,采用基于句法距离的注意力捕获更有意义的上下文特征,排除无关信息的干扰;为了有效利用实体中的潜在特征,采用全局统计的单词-实体-事件共现特征,指导事件类型感知注意力挖掘词与事件之间的强关联性。在触发词定位阶段,根据识别出的事件类型,制定问题回答该事件对应的触发词索引,从而利用丰富的问答数据库实现数据增强。在MLEE语料库上的结果表明,两阶段问答范式、句法距离和事件类型感知注意力都有效地提升了模型性能,所提出的模型取得了81.39%的F1分数,并在多个事件类型上的详细结果均优于其他基线模型。

关键词：生物医学事件触发词检测句法距离单词-实体-事件共现特征两阶段问答范式

Photoelectrochemical oxygen atom transfer enabling efficient selective oxygenation

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Science China Chemistry 2022年第1期65卷 5-6页

作者： yujie xiong School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China

Photoelectrochemical(PEC)technique represents a promising approach to chemical transformation by harvesting sustainable solar *** the wide applications of PEC systems such as environmental remediation and solar energy conversion,the reported PEC reactions are dominated by the radical-based processes that are initiated by the single electron transfer between photo-induced carriers and adsorbed species on photoelectrode surface[1,2].For instance,hydroxyl radicals are often involved in the PEC oxidation *** well known,it is a grand challenge to control the formation and evolution rates of radicals,which inevitably leads to the unsatisfactory product selectivity of PEC ***,such a circumstance brings about a question to the research community whether a different mechanism can be established to sustain efficient and selective ***,based on their previous findings on PEC water oxidation[3,4],Zhao and coworkers[5]reported that many substrates can be oxidized in an oxygen atom transfer(OAT)pathway,a non-radical two electron process,to oxygenated products byα-Fe2O3 photoanodes.

关键词： transfer electrochemical radical

Solar-Driven Artificial Carbon Cycle

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Chinese Journal of Chemistry 2022年第1期40卷 153-159页

作者： Chao Gao yujie xiong Hefei National Laboratory for Physical Sciences at the Microscale and School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui 230026China

Constituting the artificial carbon cycle,for example,through recycling CO_(2) and converting CH_(4) to value-added fuels and chemicals with solar energy,offers a sustainable future for humankind to tackle the global environmental issues and energy ***,significant bottlenecks remain in such photocatalytic conversion,mainly related to the reaction activity and product ***,we share our efforts and systematic research progress on addressing the double bottlenecks for achieving solar-driven artificial carbon cycle,with specifically focusing on the photocatalytic CO_(2) and CH_(4) *** further elucidate the common fundamentals behind various designed photocatalytic materials *** future development,we highlight the opportunities and challenges in the research field.

关键词： Carbon storage Photocatalysis Energy conversion Carbon dioxide reduction Methane conversion