检索结果-南通市图书馆

A new nonfullerene acceptor with an extended π conjugation core enables ternary organic solar cells approaching 19%efficiency

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 4062-4068页

作者： Chunyan Liu nailiang Qiu Zhengjin Li Yan Lu School of Materials Science and Engineering Tianjin Key Laboratory for Photoelectric Materials and DevicesKey Laboratory of Display Materials and Photoelectric DevicesMinistry of EducationTianjin University of TechnologyTianjin 300384China School of Chemistry Chemical Engineering and MaterialsJining UniversityQufu 273155China

In organic solar cells(OSCs),it is an effective way to improve the power conversion efficiency(PCE)by adding a guest component with appropriate absorption and energy levels in the host system.Herein,a new nonfullerene acceptor(NFA)named TBF-2Cl was developed by the strategy of expanding theπconjugated core of 2,2’-(((4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b’]dithiophene-2,7-diyl)bis(methaneylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(IDT-4Cl)with two benzene rings.With increase of benzene units,TBF-2Cl exhibits higher lowest unoccupied molecular orbital(LUMO)level of-3.75 eV than that of one benzene unit based NFA IDT-4Cl and fluorene core based NFA F-2Cl,which facilitates enhancing the open-circuit voltage(V_(oc))of ternary devices.Moreover,TBF-2Cl film shows a medium optical bandgap with the absorption range from 500-800 nm,being well complementary with the wide bandgap polymer donor D18 and narrow bandgap NFA CH-6F.Accordingly,a remarkable PCE of 18.92%with a high short-circuit current density(J_(sc))of 27.40 mA·cm^(-2),a fill factor(FF)of 0.749,especially an outstanding V_(oc) of 0.922 V was achieved for the optimal ternary device based on D18:TBF-2Cl:CH-6F,surpassing the binary counterpart(17.08%).The findings provide insight into the development of new guest acceptors for obtaining more efficient OSCs.

关键词： medium optical bandgap high lowest unoccupied molecular orbital(LUMO)level the third component ternary organic solar cell high open-circuit voltage

Smart heat isolator with hollow multishelled structures

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第4期8卷 1154-1160页

作者： Kun Wang Lekai Xu Jiao Wang Shaojun Zhang Yanlei Wang nailiang yang Jiang Du Dan Wang Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou UniversityZhengzhou450001China State Key Laboratory of Biochemical Engineering Key Laboratory of Science and Technology on Particle MaterialsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou450000China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing100049China Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

Safe, green and efficient industrial production has always been the pursuit of the chemical industry. Since thermal energy is the driving force for most of chemical reactions, an ideal reaction tank would have the capacity to automatically regulate heat conduction rate. In detail, this reaction tank should endow an ability that resists the heat loss when the reaction temperature is lower than the target, while accelerating the heat dissipation when the system is overheated. In this case, this smart reactor can not only minimize energy consumption but also reduce safety risks.Hollow structures are known to reduce heat conductivity. Particularly, the hollow structure with multishells can provide more interfaces and thus further inhibit heat transmission, which would be more favorable for heat isolation. Step forward, by coupling HoMSs with temperature-sensitive polymer, a smart heat isolation material has been fabricated in this work. It performs as a good heat isolator at a relatively lower temperature. A heat insulation effect of 6.5℃ can be achieved for the TSPU/3S–TiO_(2)HoMSs with a thickness of 1 mm under the temperature field of 50℃.The thermal conductivity of composite material would be raised under overheating conditions. Furthermore, this composite displays an unusual two-stage phase transformation during heating. Benefiting from the unique multishelled structure, energy is found to be gradually guided into the hollow structure and stored inside. This localized heat accumulation enables the composite to be a potential coating material for intelligent thermal-regulator and site-defined micro-reactor.

关键词： Hollow multishelled structures Thermal insulation Smart material

When hierarchical structure meets the solar cell

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2017年第4期62卷 234-235页

作者： nailiang yang Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore

Hierarchical structures with different length scales,which appear in many animals and plants,play important roles in their structural and functional integrity[1,2].These structures endow their host animals and plants with intriguing properties including super-hydrophobicity,reversible adhesion as well as mechanical or optical properties.Efforts also have been devoted to introducing bio-inspired hierarchical structures for solar cells to enhance

关键词：分层结构太阳能电池层次结构宿主动物超疏水性光学性质动植物附着力

Molecule functionalization to facilitate electrocatalytic oxygen reduction on graphdiyne

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第2期31卷 141-148页

作者： Huiying Yao Yasong Zhao nailiang yang Wei Hao Hu Zhao Shuzhou Li Jia Zhu Lin Shen Weihai Fang College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing 100875China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Materials Science and Engineering Nanyang Technological University50 Nanyang Avenue639798Singapore Department of Physics Beijing Normal UniversityBeijing 100875China Laboratory of Theoretical and Computational Nanoscience CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China

Chemical doping is verified to be a promising strategy to regulate local electron distribution and further promote the poor intrinsic catalytic activity of graphdiyne.However,the current doping approach still faces problems such as precise doping for creating active sites and the destruction of graphdiyne skeleton calling for high temperature.Here,we achieved charge redistribution on graphdiyne surface through molecule functionalization.A p-type molecule–F4 TCNQ(2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodime thane)was introduced and the site-defined functionalization was accomplished.Theoretical calculations showed that the charge transfer ability is improved and graphdiyne becomes positively charged.The oxygen reduction electrocatalysis was conducted as a proof of principle,where the electronic states of sp hybridized C active site was tuned toward favorable reaction intermediates’adsorption.Such work from both theoretical prediction and experimental validation,found that molecule functionalization is effective to promote the electrocatalytic oxygen reduction,which creates new possibilities for graphdiyne’s applications in different electrochemical reactions.

关键词： Graphdiyne F4TCNQ Density functional calculations Electronic structure Oxygen reduction reaction

Multishelled CuO/Cu_(2)O induced fast photo-vapour generation for drinking water

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第5期15卷 4117-4123页

作者： Xuanbo Chen Ping Li Jiao Wang Jiawei Wan nailiang yang Bo Xu Lianming Tong Lin Gu Jiang Du Jianjian Lin(✉) Ranbo Yu Dan Wang Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Key Laboratory of Science and Technology on Particle MaterialsChinese Academy of SciencesBeijing 100190China Key Laboratory of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Henan Province Industrial Technology Research Institute of Resources and Materials Green Catalysis CenterCollege of ChemistryZhengzhou UniversityZhengzhou 450001China University of Chinese Academy of Sciences Beijing 100049China Center for Nano-chemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Solar thermal interfacial water evaporation is proposed as a promising route to address freshwater scarcity,which can reduce energy consumption and have unlimited application scenarios.The large semiconductor family with controllable bandgap and good chemo-physical stability are considered as good candidates for photo-evaporation.However,the evaporation rate is not satisfactory because the rational control of nano/micro structure and composition is still in its infancy stage.Herein,by systemically analyzing the photo-thermal evaporation processes,we applied the hollow multishelled structure(HoMS)into this application.Benefiting from the multishelled and hierarchical porous structure,the light absorption,thermal regulation,and water transport are simultaneously optimized,resulting in a water evaporation rate of 3.2 kg·m^(-2)·h^(-1),which is among the best performance in solar-vapour generation.The collected water from different water resources meets the World Health Organization standard for drinkable water.Interestingly,by using the CuO/Cu_(2)O system,reactive oxygen species were generated for water disinfection,showing a new route for efficient solar-vapour generation and a green way to obtain safe drinking water.

关键词： multishelled structure hollow structure water evaporation nano/micro structure

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

炔键赋予的石墨炔位点选择性修饰

硅酸盐学报 2024年第2期52卷 390-404页

作者：王祖民杨乃亮于然波王丹中国科学院过程工程研究所生化工程国家重点实验室北京100190 北京科技大学冶金与生态工程学院北京100083

石墨炔是由2种不同杂化形式的碳原子拓扑有序构成的二维碳同素异形体。石墨炔中共存的sp和sp^(2)杂化碳原子使得表面电子局域不均匀分布,从而为设计化学反应、位点选择掺杂、可控的原子担载提供了可能。本文从石墨炔独特的富炔结构出发... 详细信息

石墨炔是由2种不同杂化形式的碳原子拓扑有序构成的二维碳同素异形体。石墨炔中共存的sp和sp^(2)杂化碳原子使得表面电子局域不均匀分布,从而为设计化学反应、位点选择掺杂、可控的原子担载提供了可能。本文从石墨炔独特的富炔结构出发,总结了石墨炔的精准修饰技术:1)石墨炔与纳米颗粒复合,利用金属-石墨炔的成键,提升材料间的电荷转移;2)利用炔键所赋予的化学反应位点,实现异质原子定点可控掺杂;3)利用石墨炔炔键电子与金属空轨道作用,调控离子或原子的传输与锚定。石墨炔的炔键结构为发展新合成方法,拓展材料在能源、催化等领域的应用提供了新的思路。

关键词：石墨炔炔键化学二维材料精准制备催化材料

Efficient sequential harvesting of solar light by heterogeneous hollow shells with hierarchical pores

在线全文

学校读者我要写书评

暂无评论

National Science Review 2020年第11期7卷 1638-1646页

作者： Yanze Wei Jiawei Wan nailiang yang Yu yang Yanwen Ma Songcan Wang Jiangyan Wang Ranbo Yu Lin Gu Lianhui Wang Lianzhou Wang Wei Huang Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology Beijing University of Chinese Academy of Sciences Chinese Academy of Sciences School of Materials Science and Engineering Nanjing University of Posts and Telecommunications School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology The University of Queensland Department of Materials Science andEngineering Stanford University Institute of Physics Chinese Academy of Sciences

In nature, sequential harvesting of light widely exists in the old life entity, i.e. cyanobacteria, to maximize the light absorption and enhance the photosynthesis efficiency. Inspired by nature, we propose a brand new concept of temporally-spatially sequential harvesting of light in one single particle, which has purpose-designed heterogeneous hollow multi-shelled structures (HoMSs) with porous shells composed of nanoparticle subunits. Structurally, Ho MSs consist of different band-gap materials outside-in, thus realizing the efficient harvesting of light with different wavelengths. Moreover, introducing oxygen vacancies into each nanoparticle subunit can also enhance the light absorption. With the benefit of sequential harvesting of light in Ho MSs, the quantum efficiency at wavelength of 400 nm is enhanced by six times compared with the corresponding nanoparticles. Impressively, using these aforementioned materials as photocatalysts,highly efficient photocatalytic water splitting is realized, which cannot be achieved by using the nanoparticle counterparts. This new concept of temporally-spatially sequential harvesting of solar light paves the way for solving the ever-growing energy demand.

关键词： light harvesting hollow structures multi-shelled solar energy conversion

Aging amorphous/crystalline heterophase PdCu nanosheets for catalytic reactions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2019年第5期6卷 955-961页

作者： Hongfei Cheng nailiang yang Xiaozhi Liu Qinbai Yun Min Hao Goh Bo Chen Xiaoying Qi Qipeng Lu Xiaoping Chen Wen Liu Lin Gu Hua Zhang Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological University State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Singapore Institute of Manufacturing Technology A*STAR School of Materials Science and Engineering University of Science and Technology Beijing School of Chemical and Biomedical Engineering Nanyang Technological University Songshan Lake Materials Laboratory Department of Chemistry City University of Hong Kong

Phase engineering is arising as an attractive strategy to tune the properties and functionalities of nanomaterials.In particular, amorphous/crystalline heterophase nanostructures have exhibited some intriguing properties.Herein, the one-pot wet-chemical synthesis of two types of amorphous/crystalline heterophase Pd Cu nanosheets is reported, in which one is amorphous phase-dominant and the other one is crystalline phase-dominant.Then the aging process of the synthesized Pd Cu nanosheets is studied, during which their crystallinity increases, accompanied by changes in some physicochemical properties.As a proof-of-concept application, their aging effect on catalytic hydrogenation of 4-nitrostyrene is investigated.As a result, the amorphous phase-dominant nanosheets initially show excellent chemoselectivity.After aging for 14 days, their catalytic activity is higher than that of crystalline phase-dominant nanosheets.This work demonstrates the intriguing properties of heterophase nanostructures, providing a new platform for future studies on the regulation of functionalities and applications of nanomaterials by phase engineering.

关键词： amorphous/crystalline heterophase nanosheets aging selective hydrogenation catalysis

Defect and interface control on graphitic carbon nitrides/upconversion nanocrystals for enhanced solar hydrogen production

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

National Science Open 2023年第2期2卷 76-88页

作者： Xiaochun Gao nailiang yang Jin Feng Jiayan Liao Shaoqi Hou Xiaoguang Ma Dawei Su Xingxing Yu Ziqing yang Javad Safaei Dan Wang Guoxiu Wang Centre for Clean Energy Technology Faculty of ScienceUniversity of Technology SydneyBroadwayNSW 2007Australia School of Physics and Optoelectronic Engineering Ludong UniversityYantai 264000China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Chemistry and Chemical Engineering Qufu Normal UniversityQufu 273165China Institute for Biomedical Materials and Devices(IBMD) Faculty of ScienceUniversity of Technology SydneyUltimoNSW 2007Australia

The effective utilization of solar energy for hydrogen production requires an abundant supply of thermodynamically active photo-electrons;however,the photocatalysts are generally impeded by insufficient light absorption and fast photocarrier recombination.Here,we report a multiple-regulated strategy to capture photons and boost photocarrier dynamics by devel-oping a broadband photocatalyst composed of defect engineered g-C_(3)N_(4)(DCN)and upconversion NaYF4:Yb^(3+),Tm^(3+)(NYF)nanocrystals.Through a precise defect engineering,the S dopants and C vacancies jointly render DCN with defect states to effectively extend the visible light absorption to 590 nm and boost photocarrier separation via a moderate electron-trapping ability,thus facilitating the subsequent re-absorption and utilization of upconverted photons/electrons.Importantly,we found a promoted interfacial charge polarization between DCN and NYF has also been achieved mainly due to Y-N interaction,which further favors the upconverted excited energy transfer from NYF onto DCN as verified both theoretically and experimentally.With a 3D architecture,the NYF@DCN catalyst exhibits a superior solar H2 evolution rate among the reported upconversion-based system,which is 19.3 and 1.5 fold higher than bulk material and DCN,respectively.This work provides an innovative strategy to boost solar utilization by using defect engineering and building up interaction between hetero-materials.

关键词： broadband precise defect engineering atomic interaction solar hydrogen production