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基于Pd/g-C_(3)N_(4)的电化学传感器同时检测木犀草素和香兰素

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广东化工 2024年第8期51卷 24-26,37页

作者：陆娇娥诸葛文凤何敏宁福磊王思遥姜雪莲广西民族师范学院广西崇左532200

石墨相氮化碳(g-C_(3)N_(4))是近年来被广泛关注的非金属半导体材料,其化学性质稳定、制备简单、成本低,但比表面积小,导电性能不理想限制了它在电化学传感器中的应用。为解决这一问题本工作通过掺杂改性的方式在g-C_(3)N_(4)表面修饰... 详细信息

石墨相氮化碳(g-C_(3)N_(4))是近年来被广泛关注的非金属半导体材料,其化学性质稳定、制备简单、成本低,但比表面积小,导电性能不理想限制了它在电化学传感器中的应用。为解决这一问题本工作通过掺杂改性的方式在g-C_(3)N_(4)表面修饰金属纳米颗粒。首先,以热缩聚合成法制备管状g-C_(3)N_(4),再通过水热法制备钯(Pd)掺杂g-C_(3)N_(4)(Pd/g-C_(3)N_(4))复合材料,并构建Pd/g-C_(3)N_(4)修饰电极应用于木犀草素(LU)和香兰素(VA)的同时测定。采用扫描电镜(SEM)、能谱(EDS)、X-射线衍射(XRD)对Pd/g-C_(3)N_(4)的形貌、结构、纯度进行表征。采用循环伏安法(CV)、差分脉冲伏安法(DPV)对LU和VA在Pd/g-C_(3)N_(4)修饰电极上的电化学行为进行研究。在最优条件下,采用DPV法同时检测LU和VA,峰电流与浓度呈线性关系,线性范围均为0.5~10μmol/L,检出限均为0.1μmol/L。

关键词：石墨相氮化碳差分脉冲伏安法木犀草素香兰素

金融科技水平影响企业非CO_(2)温室气体排放的实证研究

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南京信息工程大学学报（自然科学版） 2022年第4期14卷 410-418页

作者：李佳刘航舶史晨辰刘跃邓祥征王姣娥陈明星首都经济贸易大学金融学院北京100070 唐山师范学院经济管理系唐山063000 北京交通大学经济管理学院北京100044 首都经济贸易大学城市经济与公共管理学院北京100070 中国科学院地理科学与资源研究所北京100101 中国科学院大学北京100049

针对企业非CO_(2)温室气体排放,以2011—2019年中国内地203个地级市面板数据为样本,构建面板门限回归模型,分析企业金融科技发展水平与非CO_(2)温室气体之间的关系.本文验证了金融科技水平影响企业非CO_(2)温室气体排放的结构特征及区... 详细信息

针对企业非CO_(2)温室气体排放,以2011—2019年中国内地203个地级市面板数据为样本,构建面板门限回归模型,分析企业金融科技发展水平与非CO_(2)温室气体之间的关系.本文验证了金融科技水平影响企业非CO_(2)温室气体排放的结构特征及区域异质性影响.本研究的主要发现包括三个方面:1)金融科技的发展呈现出显著的污染减排效果,能够抑制非CO_(2)温室气体排放.企业的金融科技较低时,其工业二氧化硫减排作用较强,但更一般的情况是,在企业的金融科技水平较高时企业的工业氮氧化物减排效果大多呈现好转的态势.2)企业金融科技发展水平对企业污染减排的作用存在结构效应.金融科技覆盖广度对企业非CO_(2)温室气体的减排强度显著强于金融科技使用深度和金融数字化程度.3)金融科技对非CO_(2)温室气体减排作用存在区域差异,整体来看,中部地区显著高于东西部地区.研究结果对于各地实行差异化金融科技发展策略,推动社会经济发展全面绿色转型,实现“双碳”目标具有一定的指导价值.

关键词：金融科技水平非CO_(2)温室气体工业二氧化硫工业氮氧化物门限效应

ZIF-8 derived nitrogen/transition bimetal co-doped porous carbon for counter electrode of dye-sensitized solar cell

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ZIF-8 derived nitrogen/transition bimetal co-doped porous ca...

第八届新型太阳能材料科学与技术学术研讨会

作者：袁双喜 Yongwei Zhang Lishan Zhang jiaoe Dang Xi wang MengLong Sun 云斯宁西安建筑科技大学

Environment contamination and energy crisis make human accelerate the exploration of high efficient new energy storage and conversion device. Dye-sensitized solar cells(DSSCs) have attracted numerous attentions in current decades due to their low cost, facile fabrication, and high theoretical power conversion efficiency(PCE). As a crucial part of DSSCs, the counter electrode(CE) plays a vital role in collecting electrons from the external circuit and catalyzing the reduction reaction in redox couples of the electrolyte. Although many efforts have been made to constructing low-cost CEs with high efficiency, practically effective reports in this field are rare. Herein, a practical strategy that combined ZIF-derived carbon with transition metals(Mo/Fe) was carried out in this paper. The resultant ZIF-8 derived nitrogen/transition metals co-doped porous carbon(called Mo/Fe-N-C) possesses great electric-conductivity and ordered hierarchical interconnected pore, facilitating the mass transfer and electron transport in the interface between CE and electrolyte. Surprisingly, Mo/Fe-N-C exhibits a remarkable PCE value of 7.52% in the iodine system. This strategy of ZIF-derived carbon doped with Mo/Fe can be expanded by incorporating other active elements within the skeleton of ZIF-derived carbon to build more effective CEs.

关键词： Dye sensitized solar cells counter electrode ZIF-8 derived nitrogen/transition bimetal co-doped carbon

N-doped carbon confined carbides and metal cobalt with dual Mott-Schottky heterojunctions for efficient tri-iodide reduction

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N-doped carbon confined carbides and metal cobalt with dual ...

第十届新型太阳能材料科学与技术学术研讨会

作者：乔丹 jiaoe Dang Yongwei Zhang Guangping Yang Tianxiang Yang Zan Gao Zhiguo wang 云斯宁西安建筑科技大学材料科学与工程学院功能材料研究所

Tailoring electronic structure of the catalyst to enhance electrocatalytic activity toward tri-iodide reduction reaction is a critical strategy but remains a ***,an advanced N-modified carbon confined Co and MoC nanoparticles(MoC/Co@NC) was elaborately designed by utilizing bimetallic-organic frameworks and phosphomolybdic acid *** Mott-Schottky configuration consisted of the MoC/Co and N-modified carbon contact interfaces(MoC|NC and Co|NC).Benefiting from the dual Mott-Schottky junctions and 3D porous carbon,the electron density and transfer ability of MoC/Co@NC was *** solar cell fabricated with MoC/Co@NC counter electrode delivered a power conversion efficiency of 7.78%,higher than the conventional Pt-based solar cell(7.38%).This work not only develops a low-cost and high-performance carbon-based catalyst but also provides a new avenue for the synthesis of electrocatalysts based on electronic engineering.

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Dual metal-Nx active sites co-modified ZIF-derived porous carbon: Effective catalysts for boosting triiodide reduction reaction

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Dual metal-Nx active sites co-modified ZIF-derived porous ca...

2021全国太阳能电池材料器件与技术大会

作者：张永伟 jiaoe Dang Changwei Dang Yingying Deng Zhuolei Liu Yinhao wang 云斯宁云斯宁西安建筑科技大学材料科学与工程学院功能材料研究所

Triiodide reduction(IRR) is an important chemical reaction in dye-sensitized solar cells(DSSCs), and the reaction rate will greatly affects the photovoltaic performance of devices. The counter electrode(CE) is an important component to catalyze IRR in DSSC. Using a CE with high catalytic activity can boost the IRR performance. In this work, Cu/Ni-Nx and Mo/Ni-Nx active sites co-modified Cu/Ni-N-C and Mo/Ni-N-C catalysts are prepared through modifying ZIF-derived porous carbon and used as the CE for catalyzing IRR in *** from the high specific surface area, modified the electronic structure of carbon substrate, as well as the synergistic effect between different metal heteroatoms, the Cu/Ni-N-C and Mo/Ni-N-C exhibit enhanced catalytic activity compare with Ni-N-C. As a result, the DSSCs based on Cu/Ni-N-C and Mo/Ni-N-C CEs yield power conversion efficiencies of 7.62% and 7.93%, exceeding that of Pt(7.29%) and Ni-N-C(7.16%). In addition, Cu/Ni-N-C and Mo/Ni-N-C show superior stability in a corrosive electrolyte. The catalytic mechanism of Cu/Ni-N-C and Mo/Ni-N-C catalysts for IRR is unveiled by DFT calculations. This work provides a guidance for preparing other metal-Nx active sites modified carbon-based catalysts in new energy fields.

关键词： Electrocatalyst Dual meta-Nx sites Triiodide reduction reaction DFT calculation Dye-sensitized solar cells

ZIF-derived carbon/molybdenum disulfide composites as a counter electrode for dye-sensitized solar cell

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ZIF-derived carbon/molybdenum disulfide composites as a coun...

第八届新型太阳能材料科学与技术学术研讨会

作者：刘卓磊 Changwei Dang Yingying Deng Yinhao wang jiaoe Dang Yongwei Zhang Menglong Sun Xi wang 云斯宁 Functional Materials Laboratory (FML) School of Materials Science and EngineeringXi’an University of Architecture and Technology

Exploring the low-cost and effective Pt-free catalysts is of particular significance for the development of dye-sensitized solar cell(DSSC). Transition metal sulfides(TMSs) have been considered as promising catalysts;however, the low utilization of active sites and poor electrical conductivity hindered its wide-ranging catalytic application. In this work, the zeolitic imidazolate frameworks(ZIF)-derived cobalt nitrogen co-doped carbon(Co/N-C) were introduced to solve the above problems. Thanks to the affecting of Co/N-C, the resultant MoS anchored Co/N-C composite(Co/N-C@MoS) is endowed with good conductivity and rich catalytic active sites, and shows substantially enhanced tri-iodide reduction reactions(IRR) electrochemical activity. Remarkably, the Co/N-C@MoS counter electrode achieves an excellent DSSC photoelectric conversion efficiency(7.85%), which is significantly better than Pt(7.24%). The present work not only develops low-cost and effective catalysts, but also provides possibilities for the structural design of TMSs composite materials.

关键词： Dye-sensitized solar cell Transition metal sulfide Zeolitic imidazolate framework nitrogen-doped carbon Counter electrode

Bimetal Cu/Ni-Nx active sits co-modified ZIF-8 derived porous carbon for boosting triiodide reduction and hydrogen evolution reaction

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Bimetal Cu/Ni-Nx active sits co-modified ZIF-8 derived porou...

第八届新型太阳能材料科学与技术学术研讨会

作者：张永伟 Jingjing Yang jiaoe Dang Ruoming wang Changwei Dang Yingying Deng Zhuolei Liu Yinhao wang 云斯宁西安建筑科技大学

Triiodide reduction(IRR) and hydrogen evolution reaction(HER) are critical chemical processes in dye-sensitized solar cells(DSSCs) and water splitting, respectively, and their reaction rates will greatly affect the photovoltaic performance and hydrogen production efficiency. The counter electrode(CE) and the cathode are an important component to catalyze IRR in DSSCs and HER in water-splitting devices, respectively. In this work, a bimetal Cu/Ni-Nx active sites co-modified Cu/Ni-N-C CE catalyst is prepared through modifying ZIF-derived porous carbon and used as the CE/cathode for catalyzing IRR and HER, respectively. Thanks to the high specific surface area, the introduction of bimetallicNx(Ni/Cu-Nx) activity sites by doping metal ions, as well as the synergistic effect between different metal heteroatoms, the Cu/Ni-N-C exhibits enhanced catalytic activity. As a result, the DSSC based on Cu/Ni-N-C CE yields a power conversion efficiency(PCE) of 7.62%, exceeding that of Pt CE(7.29%). In addition, the Cu/Ni-N-C exhibits outstanding electrocatalytic activity for driving HER with a low overpotential of 153.8 mV at 10 mA cm, which is close to that of Pt/C(47.8 mV). Further, the catalytic mechanism of Cu/Ni-N-C catalyst for IRR and HER is unveiled by DFT calculations. This work provides an effective and versatile strategy of metal coordinated ZIF-derived carbon for preparing superior catalysts in new energy fields.

关键词： Dye-sensitized solar cells Counter electrode ZIF-8 Electrocatalyst

人文与经济地理学的传承与创新：青年学者的行动

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地理研究 2018年第10期37卷 2096-2124页

作者：陈明星陆大道唐常春刘承良叶玉瑶丁建军王姣娥刘晔唐志鹏孙中伟陈东李钢孙伟李鹤潘峰华张圆刚李玉恒李裕瑞魏冶赵建吉彭立高菠阳胡志丁钱丽芸姜炎鹏董冠鹏杨传开虞虎安宁戚伟中国科学院地理科学与资源研究所区域可持续发展分析与模拟院重点实验室北京100101 长沙理工大学土木与建筑学院长沙410114 华东师范大学城市与区域科学学院上海200062 广州地理研究所广州510070 吉首大学商学院吉首416000 中山大学地理科学与规划学院广州510275 石家庄学院资源与环境科学学院石家庄050035 西北大学城市与环境学院西安710127 中国科学院南京地理与湖泊研究所南京210008 中国科学院东北地理与农业生态研究所长春130102 北京师范大学地理学与遥感科学学院北京100875 澳门城市大学国际旅游与管理学院中国澳门999078 东北师范大学地理科学学院长春130024 河南大学黄河文明与可持续发展研究中心暨黄河文明传承与现代文明建设河南省协同创新中心开封475001 中国科学院水利部成都山地灾害与环境研究所成都610041 中央财经大学城市与房地产管理系北京100081 云南师范大学旅游与地理科学学院昆明650500 苏州大学社会学院苏州215000 香港大学地理系中国香港999077 英国利物浦大学大学地理与规划学院利物浦L69 7ZT 上海社会科学院城市与人口发展研究所上海200020 广州大学地理科学学院华南人文地理与城市发展研究中心广州510006

2018年是中国改革开放40周年,也是"科学的春天"40周年。随着中国进入特色社会主义新时代,人文与经济地理学也将迈入新时代。青年学者恰好处在承前启后的这一时期,围绕学科传承和创新发展需要,面向新时代国家和经济社会发展的现实需求,... 详细信息

2018年是中国改革开放40周年,也是"科学的春天"40周年。随着中国进入特色社会主义新时代,人文与经济地理学也将迈入新时代。青年学者恰好处在承前启后的这一时期,围绕学科传承和创新发展需要,面向新时代国家和经济社会发展的现实需求,青年学者积极行动起来,努力学习和传承人文与经济地理学前辈所建立的学科体系,并力图继续开拓和创新。一是助力建设学科文化,打造具有学科认同感和归属感的学术共同体。二是在向西方学习的同时,加强中国特色的自主理论建构与创新。三是向相关学科方向学习,加强交叉与综合的数据和方法创新,建设科学化、多元化的研究方法体系。四是青年学者更需要踏实认真的态度,找准个人研究领域方向,求真务实并力图创造新的知识,不断提升研究深度。人文与经济地理学的学科梦必将在一代代青年学者的接力奋斗中变为现实。

关键词：人文与经济地理学青年学者责任行动传承创新新时代

Nickel modified nitrogen-doped carbon composites as high-efficiency electrocatalysts for triiodide reduction reactions

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Nickel modified nitrogen-doped carbon composites as high-eff...

第八届新型太阳能材料科学与技术学术研讨会

作者：张丽珊 Menglong Sun Xi wang Shuangxi Yuan Yingying Deng Yinhao wang Zhuolei Liu Changwei Dang jiaoe Dang 云斯宁 Functional Materials Laboratory (FML) School of Materials science and EngineeringXi’an University of Architecture and Technology

The development of an efficient and low-cost synthesis method to prepare highly stable non-noble metal counter electrode(CE) electrocatalysts for dye-sensitized solar cells(DSSC) is a crucial issue. In this work, an efficient and stable noble metal-free IRR catalyst is prepared by in-situ synthesis. The catalyst includes dicyandiamide and metal salt as precursors, and transition metal modified N-doped graphite nanotubes and carbon nanoparticles(Ni NP|Ni-NDC) are synthesized. The excellent catalytic activity of composites mainly attributes to the rich defect sites and outstanding electronic structures inside the materials. Ni NP|Ni-NDC shows an excellent power conversion efficiency(PCE) of 7.32%, which is comparable to a PCE of 7.03% based on Pt. Further electrochemical measurements also proved the high chemical stability and catalytic activity of the prepared catalyst. This research provides a new way to design highperformance and stable catalysts for photovoltaic devices.

关键词： Dye-sensitized solar cell Counter electrode Catalysts Nitrogen-doped carbon