检索结果-南通市图书馆

In situ preparation of Nanoparticles/polymer composites

Science china(Technological Sciences) 2008年第11期51卷 1886-1901页

作者： sun haizhu & yang bai state key lab of supramolecular structure and materials, college of chemistry, jilin university, changchun 130012, china college of chemistry, Northeast Normal university, changchun 130024, china state key lab of supramolecular structure and materials College of Chemistry Jilin University college of chemistry Northeast Normal Universit

Nanoparticle (NP) is the matter between molecule and bulk material. It has attracted much attention in catalysis, optoelectronics and biology due to its unique physical and chemical properties. Incorporation of these NPs into the polymer matrix is one of the best methods to display their special functions, which not only stabilize the NPs but also realize the functional assembly of NPs and polymers. However, reali- zation of this idea depends largely on the compatibility of NPs and polymers as well as the interaction between them. Therefore, many methods have been developed to prepare the composites of NPs and polymers in order to obtain the function ex- pected. In this review, we mainly focus on the combination of in situ method with other methods to synthesize different functional one-dimension, two-dimension as well as bulk composites, which has been recently developed by our group. The most striking character of our method is the excellent compatibility between NPs and polymers which ensures a homogeneous distribution of NPs in the polymer matrix. The existence of the polymer network makes the NPs more stable, and is significant for displaying their functions.

关键词： in situ nanoparticle polymer composite function

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An Effective Method to Prepare Polymer/Nanocrystal Composites with Tunable Emission over the Whole Visible Light Range

引用

Nano Research 2010年第7期3卷 496-505页

作者： Haotong Wei haizhu sun Hao Zhang Cong Gao bai yang state key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun 130012China college of chemistry Northeast Normal UniversityChangchun 130024China

materials with emission over the whole visible range(400-800 nm)have been obtained through incorporating single-colored CdTe nanocrystals(NCs)into a poly(p-phenylene vinylene)(PPV)precursor[the sulfonium polyelectrolyte precursor of PPV].Firstly,the quantum yield(QY)of the PPV precursor was improved to~50%via heat treatment of a mixed solution of the PPV precursor and poly(vinyl alcohol)(PVA)at 100°C for 3 ***,single-colored CdTe NCs were incorporated into the mixed *** introduction of the PVA was necessary to reduce the electrostatic interaction between the PPV precursor and CdTe NCs,which improved their *** reduced electrostatic interaction eliminated Förster resonance energy transfer(FRET)processes between NCs,as well as between NCs and the PPV precursor,which allowed the functional integration of the polymer and ***,polymer/NC composites with almost any Commission Internationale de L’Eclairage(CIE)coordinates can be achieved by simply changing the size and amount of the *** particular,when the emission wavelength of the CdTe NCs was 559 nm,a pure white-light emitting material with CIE coordinates(0.337,0.332)was obtained.

关键词： Nanocrystal poly(p-phenylene vinylene) CdTe poly(vinyl alcohol)

来源：

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

Aqueous-processed insulating polymer/nanocrystal solar cells with effective suppression of the leakage current and carrier recombination

引用

Chinese Chemical Letters 2020年第6期31卷 1593-1597页

作者： Henan sun Nannan Chen Yaohua Wang Gan Jin Wei Yuan haizhu sun bai yang college of chemistry National Local United Engineering Laboratory for Power Batteries.Northeast Normal UniversityChangchun 130024China college of Material and Chemical Engineering Chuzhou UniversityChuzhou 239000China state key laboratory of supramolecular structure and materials College of ChemistryJilin UniversityChangchun 130012China

As one of the most environmentally friendly photovoltaic(PV)conversion equipments,aqueousprocessed CdTe nanocrystal solar cells(NC SCs)have attracted great interest in recent years because of their excellent properties such as high charge-carrier mobility and broad ***,two issues including interfacial recombination and leakage current seriously restrict their *** this paper,insulating polymer poly(vinyl pyrrolidone)(PVP)is introduced into CdTe NC SCs to solve the *** experimental results of transmission electron microscopy(TEM),atomic force micro scopy(AFM)and dark current measurements,etc.,demonstrate the leakage current is effectively suppressed by introducing *** further designing device structure,the reduction of interfacial recombination after introducing PVP is *** strategically taking the advantages of PVP properties(e.g.,water solubility and thermostability),the power conversion efficiency of the devices with PVP is enhanced by almost 37%compared to pure CdTe *** work demonstrates an effective and low-cost method to fabricate NC SCs via aqueous ***,it also proves that appropriate content of insulating polymer is of beneficial in promoting the PV performance.

关键词： Aqueous-processed Polymer Nanocrystal Recombination Leakage current

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

碳点的设计合成、结构调控及应用

引用

高等学校化学学报 2021年第2期42卷 349-365页

作者：孙海珠杨国夺杨柏吉林大学化学学院超分子结构与材料国家重点实验室长春130012 东北师范大学化学学院动力电池国家‐地方联合工程实验室长春130024

碳点是一类环境友好且性能独特的纳米粒子,在光电转换、生物医学、催化及储能等领域的研究日益活跃.碳点主要分为碳量子点(CQDs)、石墨烯量子点(GQDs)和碳化聚合物点(CPDs),其中CPDs作为一种新型碳点,具有合成原料广泛、碳化程度及共轭... 详细信息

碳点是一类环境友好且性能独特的纳米粒子,在光电转换、生物医学、催化及储能等领域的研究日益活跃.碳点主要分为碳量子点(CQDs)、石墨烯量子点(GQDs)和碳化聚合物点(CPDs),其中CPDs作为一种新型碳点,具有合成原料广泛、碳化程度及共轭结构可调且材料相容性好等优点.本文综合评述了近年来碳点尤其是CPDs的合成方法;阐述了通过选择前驱体分子、控制反应条件及掺杂原子等手段实现对其碳化和共轭程度、晶格和能级结构的调控,从而建立碳点及其杂化与复合材料微纳结构与性能之间的关系;最后,介绍了碳点在生物标记与成像、光(电)催化、光电转换及储能等领域的应用,并对碳点领域的发展前景进行了展望.

关键词：碳化聚合物点构效关系碳点

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cross-linking enhanced room-temperature phosphorescence of carbon dots

引用

SmartMat 2022年第2期3卷 337-348页

作者： Boyang Wang Zhen sun Jingkun Yu Geoffrey I.N.Waterhouse Siyu Lu bai yang Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhouChina School of Chemical Sciences The University of AucklandAucklandNew Zealand state key lab of supramolecular structure and materials College of ChemistryJilin UniversityChangchunChina

Currently,there is a strong drive to discover alternative materials that exhibit room-temperature phosphorescence(RTP)for displays,bioimaging,and data ***,these materials should be nontoxic,cheap,and possess controllable photoluminescent *** dots(CDs)possess each of these characteristics,but to date,less attention has been paid to their RTP ***,we synthesized a series of CDs by self-crosslinking and carbonization of *** resultant CDs were luminescent and exhibited a bright,micro-second afterglow *** increase the RTP,a second microwave processing step was used to coat the CDs with polyvinyl alcohol(PVA),polyacrylamide(PAM),or tetraethyl orthosilicate(TEOS),producing CDs@PVA,CDs@PAM,and CDs@TEOS *** core-shell structure acted to enhance crosslinking at the surface of the CDs to boost the RTP,creating abundant energy levels for intersystem *** situ X-ray photoelectron spectroscopy verified electron transfer during ***,we present a design rule that can be used to tune the quantum yields and RTP lifetime of CDs,based on the effective stabilization of triplet excited states through the extent and strength of *** simple strategy provides a flexible route for guiding the further development of CDs with tailored RTP properties for various applications.

关键词： carbon dots crosslink-enhanced emission effect phosphorescence mechanism polymers room-temperature phosphorescence

来源：

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

Engineering the synergistic effect of carbon dots-stabilized atomic and subnanometric ruthenium as highly efficient electrocatalysts for robust hydrogen evolution

引用

SmartMat 2022年第2期3卷 249-259页

作者： Yuan Liu Ning Chen Weidong Li Mingzi sun Tong Wu Bolong Huang Xue Yong Qinghua Zhang Lin Gu Haoqiang Song Robert Bauer John S.Tse Shuang-Quan Zang bai yang Siyu Lu Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhouChina Canadian Light Source University of SaskatchewanSaskatoonCanada Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHong KongChina Department of Physics and Engineering Physics University of SaskatchewanSaskatoonCanada Beijing National laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina state key lab of supramolecular structure and materials college of chemistry Jilin UniversityChangchunChina

Currently,the most efficient electrocatalyst for the hydrogen evolution reaction(HER)in water dissociation is Pt-based ***,the high cost and less than perfect efficiency hinder wide-range industrial/technological ***,by controlling the treatment temperature of tris(2,2-bipyridine)ruthenium dichloride hexahydrate,synthesis of compounds with novel ruthenium single/dual atoms(Ru S/DAs)mixed with Ru nanoclusters(Ru S/DAs+Ru NCs)and supported by carbon dots is *** compounds are shown to be highly efficient and competitive catalysts for hydrogen *** S/DAs+Ru NCs exhibit very high activity,with overpotentials of 15 and 40mV at a current density of 10mA/cm2 in 1.0mol/L KOH and 0.5mol/L H2SO4,***,the composites are found to possess outstanding stability and rapid HER kinetics.X ray absorption fine structure analysis,supported by density functional theory calculations,shows charge rearrangement in single-atomic Ru,and the Ru dual sites promote active hydrogen adsorption and *** S/DAs and Ru NCs demonstrate high electroactivity due to the electroactive Ru 4d *** introduction of Ru NCs activates the carbon support,providing a high electronic conductivity to transfer electrons from Ru NCs to Ru S/DAs,and facilitates water dissociation for the HER process.

关键词： carbon dots hydrogen evolution reaction nanoclusters ruthenium single/dual atoms

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：