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A core-satellite structured type Ⅱ heterojunction photocatalyst with enhanced CO_(2) reduction under visible light

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Nano Research 2022年第10期15卷 8880-8889页

作者： Yuanyuan Cheng Yixian liu Yunliang liu Yaxi Li Ruqiang Wu Yongchao Du Najmeh Askari naiyun liu Fen Qiao Chenghua Sun Zhenhui Kang Haitao Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Faculty of Science Engineering&TechnologySwinburne University of TechnologyVictoria 3122Australia Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

Photocatalytic reduction of carbon dioxide into valuable chemicals is a sustainable and promising technology that alleviates the greenhouse effect and energy *** this study,the Mn_(3)O_(4)/FeNbO_(4) type Ⅱ heterojunction photocatalyst with a core-satellite structure was synthesized by the facile soft chemical *** formation of a nano-heterojunction is supposed to effectively improve light capture,charge transfer,and interfacial charge separation in the photochemical ***,the heterojunction has a good ability to capture and activate CO_(2).Our results show that the prepared Mn_(3)O_(4)/FeNbO_(4) photocatalyst exhibit obvious enhanced catalytic properties in the photocatalytic CO_(2) reduction reaction,where the CH_(4) yielding rate is 1.96 and 9.81 times those of FeNbO_(4) and Mn_(3)O_(4),*** transient photovoltage test(TPV)shows that the low frequency electrons are crucial to the effective transfer of photogenerated electrons and holes in the Mn_(3)O_(4)/FeNbO_(4) nano *** of in situ Fourier transform infrared spectroscopy(FTIR)verifies the effective CO_(2) adsorption on the Mn_(3)O_(4)/FeNbO_(4) surface and the high selectivity of CH_(4) *** properties of the Mn_(3)O_(4)/FeNbO_(4) photocatalyst infer its broad prospects in the fields of carbon fixation and energy conservation.

关键词： typeⅡheterojunction Mn_(3)O_(4)/FeNbO_(4) photocatalysis CO_(2)reduction

Mechanochemical route to fabricate an efficient nitrate reduction electrocatalyst

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Nano Research 2024年第6期17卷 4889-4897页

作者： Yunliang liu Zhiyu Zheng Sobia Jabeen naiyun liu Yixian liu Yuanyuan Cheng Yaxi Li Jingwen Yu Xin Wu Nina Yan Lei Xu Haitao Li Institute for Energy Research School of Energy and Power EngineeringJiangsu UniversityZhenjiang 212013China Jiangsu Engineering Technology Research Center of Biomass Composites and Addictive Manufacturing Institute of Agricultural Facilities and EquipmentJiangsu Academy of Agricultural SciencesNanjing 210014China Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River Ministry of Agriculture and Rural AffairsNanjing 210014China

The electrochemical nitrate reduction reaction(NO_(3)RR)to ammonia under ambient conditions is a promising approach for addressing elevated nitrate levels in water bodies,but the progress of this reaction is impeded by the complex series of chemical reactions involving electron and proton transfer and competing hydrogen evolution ***,it becomes imperative to develop an electro-catalyst that exhibits exceptional efficiency and remarkable selectivity for ammonia synthesis while maintaining long-term *** the magnetic biochar(Fe-C)has been synthesized by a two-step mechanochemical route after a pyrolysis treatment(450,700,and 1000℃),which not only significantly decreases the particle size,but also exposes more oxygen-rich functional groups on the surface,promoting the adsorption of nitrate and water and accelerating electron transfer to convert it into *** showed that the catalyst(Fe-C-700)has an impressive NH_(3)production rate of 3.5 mol·h^(−1)·gcat^(−1),high Faradaic efficiency of 88%,and current density of 0.37 A·cm^(−2)at 0.8 V *** hydrogen electrode(RHE).In-situ Fourier transform infrared spectroscopy(FTIR)is used to investigate the reaction intermediate and to monitor the *** oxygen functionalities on the catalyst surface activate nitrate ions to form various intermediates(NO_(2),NO,NH_(2)OH,and NH_(2))and reduce the rate determining step energy barrier(*NO_(3)→*NO_(2)).This study presents a novel approach for the use of magnetic biochar as an electro-catalyst in NO_(3)RR and opens the road for solving environmental and energy challenges.

关键词： mechanochemical route magnetic biochar electron transfer nitrate ammonia

Modification of the CuO electronic structure for enhanced selective electrochemical CO_(2) reduction to ethylene

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Nano Research 2024年第8期17卷 7194-7202页

作者： Xin Wu Zhuang Tong Yunliang liu Yaxi Li Yuanyuan Cheng Jingwen Yu Peng Cao Chunqiang Zhuang Qiuzhong Shi naiyun liu Xiang liu Hongyu Liang Haitao Li Institute for Energy Research School of Energy and Power EngineeringJiangsu UniversityZhenjiang 212013China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China Institute of Medicine&Chemical Engineering Zhenjiang CollegeZhenjiang 212013China Institute of Advanced Manufacturing and Modern Equipment Technology School of Mechanical EngineeringJiangsu UniversityZhenjiang 212013China

Electrochemical carbon dioxide reduction reaction(CO_(2)RR)can produce value-added hydrocarbons from renewable electricity,providing a sustainable and promising approach to meet dual-carbon targets and alleviate the energy ***,it is still challenging to improve the selectivity and stability of the products,especially the C^(2+) *** we propose to modulate the electronic structure of copper oxide(CuO)through lattice strain construction by zinc(Zn)doping to improve the selectivity of the catalyst to *** performance and in situ characterization analyses show that the compressive strain generated within the CuO lattice and the electronic structure modulation by Zn doping enhances the adsorption of the key intermediate*CO,thereby increasing the intrinsic activity of CO_(2)RR and inhibiting the hydrogen precipitation *** the best catalysts had significantly improved ethylene selectivity of 60.5%and partial current density of 500 mA·cm^(–2),and the highest C^(2+) Faraday efficiency of 71.47%.This paper provides a simple idea to study the modulation of CO_(2)RR properties by heteroatom doped and lattice strain.

关键词： CO_(2) reduction heteroatom-doped lattice strain ethylene selectivity

One-step synthesis of cobalt,nitrogen-codoped carbon as nonprecious bifunctional electrocatalyst for oxygen reduction and evolution reactions

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Science Bulletin 2016年第10期61卷 68-77页

作者： Sijie Guo Yanmei Yang naiyun liu Shi Qiao Hui Huang Yang liu Zhenhui Kang Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University

It is highly desired for the development of efficient bifunctional electrocatalyst for both oxygen reduction reaction （ORR） and oxygen evolution reaction （OER） in renewable energy technologies. In this work, cobalt, nitrogen-codoped carbon was prepared by a facile one-step method and demonstrated to exhibit good elec- trocatalytic performance for ORR and OER via a complete four-electron process. Besides, the catalyst prepared at 900 ℃ also displayed excellent stability for both ORR and OER. Furthermore, the origin of catalytic activity was also explored, which was attributed to the synergistic effects of metallic Co and quaternary N.

关键词： Carbon quantum dots Bifunctionalcatalyst Electrochemical performance

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基于超微电极的原位电化学拉曼光谱

中国科学：化学 2021年第3期51卷 256-263页

作者：刘乃云吴丽文黄逸凡上海科技大学物质科学与技术学院上海201210

原位电化学拉曼光谱是一种重要的光谱电化学技术.基于超微电极的原位电化学拉曼光谱将拉曼光谱反映的结构信息与电极表面的电化学过程从实验上严格对应和关联,为深刻理解电化学反应机理提供依据.本文综述了采用超微电极作为工作电极的... 详细信息

原位电化学拉曼光谱是一种重要的光谱电化学技术.基于超微电极的原位电化学拉曼光谱将拉曼光谱反映的结构信息与电极表面的电化学过程从实验上严格对应和关联,为深刻理解电化学反应机理提供依据.本文综述了采用超微电极作为工作电极的原位电化学拉曼光谱的研究方法和应用进展,总结了应用超微电极作为工作电极开展电化学拉曼光谱实验的方法和具有表面增强拉曼活性的超微电极制备方法,展示了如何利用在超微电极表面获得的拉曼光谱与界面电化学过程的严格关联研究单个锌颗粒电化学氧化过程、吡啶分子在Au电极表面的电化学吸附过程,以及如何利用该技术能以高的信噪比和灵敏度同时测量光电流与分子反应这一特性研究对巯基苯胺选择性光氧化反应.采用超微电极作为工作电极的原位电化学拉曼光谱技术极大拓展了拉曼光谱技术的研究范围,有望成为探索(光)电化学反应的有力工具.

关键词：超微电极谱学电化学拉曼光谱

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医疗专用无线网络系统的规划设计

智能建筑 2015年第12期 64-68页

作者：刘乃运南京市建筑设计研究院有限责任公司

医院不同于一般办公建筑,对于无线网络的应用具有其独有的要求,本文主要介绍了医疗专用无线网络系统的需求分析、规划设计以及该系统的优势所在。

关键词：医院无线网络系统需求分析规划设计优势

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4.3%铜锌锡硫硒太阳能电池组件

Science Bulletin 2023年第14期68卷 1497-1499,M0003页

作者：袁明君相春旭严振周鸿飞刘乃云魏淑霞李伟闫伟博杨春雷辛颢 State Key Laboratory for Organic Electronics and Information Displays School of Chemistry and Life SciencesNanjing University of Posts&TelecommunicationsNanjing 210023China Center for Photonics Information and Energy Materials Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China

铜锌锡硫硒半导体材料组成元素储量丰富、绿色环保、稳定性高,由其制备的薄膜太阳能电池效率已接近15%的商业化基准线.然而,目前铜锌锡硫硒太阳能电池的研究主要集中于有效面积小于1 cm~2的单节电池,面向商业化应用的组件还未见报道.本... 详细信息

铜锌锡硫硒半导体材料组成元素储量丰富、绿色环保、稳定性高,由其制备的薄膜太阳能电池效率已接近15%的商业化基准线.然而,目前铜锌锡硫硒太阳能电池的研究主要集中于有效面积小于1 cm~2的单节电池,面向商业化应用的组件还未见报道.本文报道面积10.5 cm~2的铜锌锡硫硒太阳能电池组件,该组件基于二甲亚砜前体溶液法制备,效率达到4.25%.与单节电池相比,效率损失率为56.8%.扫描电子显微镜形貌及元素组成分析结果表明:通过激光(P1,P2)和机械(P3)划线成功实现了模块化和串联集成;溶液制备工艺在P1凹槽沉积了更厚的吸收层,有利于降低横向电荷传输电阻;在皮秒激光划线下未观察到吸收层材料的金属化.组件的成功制备将铜锌锡硫硒薄膜太阳能电池向实际应用推进了一步.

关键词：薄膜太阳能电池太阳能电池组件铜锌锡硫硒商业化应用吸收层半导体材料电荷传输溶液制备

Algicidal activities of secondary metabolites of marine macroalgal-derived endophytic fungi

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Journal of Oceanology and Limnology 2019年第1期37卷 112-121页

作者： MIAO Fengping ZUO Jincheng liu Xianghong JI naiyun Yantai Institute of Coastal Zone Research Chinese Academy of Sciences College of Life Science Ludong University

Red tide occurrs frequently and causes signi?cant damage to the environment and human health. As a result, development of new effcient and environment friendly red-tide microalgae inhibitors has gained increasing attention in recent times. Algicolous endophytic fungi with unique habitats are promising sources for active agents owing to their abundant secondary metabolites and distinguished activities. In this study, the algicidal activities of 49 marine macroalgal-derived endophytic fungi against phytoplankton Alexandrium tamarense, Prorocentrum donghaiense, Heterosigma akashiwo, and Chattonella marina were examined using 96-well microplate. Four fungal strains, including Aspergillus wentii(pt-1), A. ustus(cf-42),and A. versicolor(dl-29, pt-20), exhibited potent algicidal activities. A total of 32 pure compounds isolated from these fungi were noted to possess dif ferent degrees of algicidal activities. Of those, 11 compounds comprising ?ve anthraquinones, two terpenoids, and four steroids showed high 24-h inhibition rates for the four red tide algae, with 24 h EC_(50) values ranging from 0.01 to 14.29 μg/mL. Among them, compound1(1,5-dihydroxy-3-methoxy-7-methylanthraquinone) presented the strongest activity against H. akashiwo,and could decrease its chlorophyll a(Chl a) and superoxide dismutase contents and increase the soluble protein, malondialdehyde, and peroxidase contents. These results suggested that the identi?ed anti-algal compound might inhibit the growth of red tide algae by weakening photosynthesis(reducing Chl a content),destroying cell membrane, and damaging the antioxidant system.

关键词： algicidal activity endophytic fungus secondary metabolite marine alga

Responses of marine-derived Trichoderma fungi to seawater and their potential antagonistic behaviour

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Journal of Oceanology and Limnology 2019年第2期37卷 525-534页

作者： SONG Yinping MIAO Fengping liu Xianghong JI naiyun Yantai Institute of Coastal Zone Research Chinese Academy of Sciences Yantai 264003 China University of Chinese Academy of Sciences Beijing 100049 China

To explore the metabolic responses of marine-derived Trichoderma fungi to environmental stresses, the survivability, metabolism, and antagonism of ten marine isolates have been examined. Their survival in both freshwater and seawater indicates them to be facultative marine fungi, but they are more adaptable to marine environment. Most of them feature strain-specific and positive metabolic responses to seawater, which also usually result in the higher proportions of heteroatom-bearing and unsaturated units in mycelial constituents. Seawater factors can promote many strains to produce bioactive metabolites, including plant pathogen- and marine phytoplankton-inhibitory and marine animal-toxic ones, but the eff ects of NaCl are often weak or negative. The inhibition of marine phytoplankton corresponds to the intracellular accumulation of heteroatom-bearing and unsaturated units under seawater condition, and the varied toxicities to marine animals further signify the divergences of lipophilic exudates under diff erent conditions. The results may contribute to further understanding and mining the structural diversity and biological activity of secondary metabolites from marine-derived Trichoderma fungi.

关键词： Trichoderma fungus metabolic response seawater antagonistic potential