检索结果-南通市图书馆

Bismuth clusters pinned on TiO_(2) porous nanowires boosting Charge transfer for CO_(2) photoreduction to CH_(4)

Nano Research 2024年第3期17卷 1190-1198页

作者： Jiazhi Meng Kaiwen Wang Yang Wang Jiangping Ma Chaogang Ban Yajie Feng Bin Zhang Kai Zhou Liyong Gan Guang Han Danmei Yu Xiaoyuan Zhou College of Physics and Institute of Advanced Interdisciplinary Studies Chongqing UniversityChongqing 401331China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Beijing Key Lab of Microstructure and Properties of Advanced Materials Beijing University of TechnologyBeijing 100124China Analytical and Testing Center Chongqing UniversityChongqing 401331China

Artificial photosynthesis in carbon dioxide(CO_(2))conversion into value-added chemicals attracts considerable attention but suffers from the low activity induced by sluggish separation of photogenerated carriers and the kinetic bottleneck-induced unsatisfied selectivity.Herein,we prepare a new-style Bi/TiO_(2) catalyst formed by pinning bismuth clusters on TiO_(2) nanowires through being confined by pores,which exhibits high activity and selectivity towards photocatalytic production of CH_(4) from CO_(2).Boosted Charge transfer from TiO_(2) through Bi to the reactants is revealed via in situ X-ray photon spectroscopy and time-resolved photoluminescence(PL).Further,in situ Fourier transform infrared results confirm that Bi/TiO_(2) not only overcomes the multi-electron kinetics challenge of CO_(2) to CH_(4) via boosting Charge transfer,but also facilitates proton production and transfer as well as the intermediates*CHO and*CH_(3)O generation,ultimately achieving the tandem catalysis towards methanation.Theoretical calculation also underlies that the more favorable reaction step from*CO to*CHO on Bi/TiO_(2) results in CH_(4) production with higher selectivity.Our work brings new insights into rational design of photocatalysts with high performance and the formation mechanism of CO_(2) to CH_(4) for solar energy storage in future.

关键词： carbon dioxide(CO_(2))photoreduction Charge transfer tandem catalysis methanation

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

Regulated adsorption-diffusion and enhanced Charge transfer in expanded graphite cohered with N,B bridge-doping carbon patches to boost K-ion storage

引用

Journal of Energy Chemistry 2023年第1期76卷 67-74,I0003页

作者： Haiyan Wang Haowen Du Hucheng Zhang Songjie Meng Zhansheng Lu Hao Jiang Chunzhong Li Jianji Wang Centre of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007HenanChina Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Physics Henan Normal UniversityXinxiang 453007HenanChina

The great challenges are remained in constructing graphite-based anode with well built-in structures to accelerate kinetics and enhance stability in the advanced K-ion batteries(KIBs).Here,we firstly report the design of expanded graphite cohered by N,B bridge-doping carbon patches(NBEG)for efficient K-ion adsorption/diffusion and long-term durability.It is the B co-doping that plays a crucial role in maximizing doping-site utilization of N atoms,balancing the adsorption-diffusion kinetics,and promoting the Charge transfer between NBEG and K ions.Especially,the robust lamellar structure,suitable interlayer distance,and rich active sites of the designed NBEG favor the rapid ion/electron transfer pathways and high K-ion storage capacity.Consequently,even at a low N,B doping concentration(4.36 at%,2.07 at%),NBEG anode shows prominent electrochemical performance for KIBs,surpassing most of the advanced carbon-based anodes.Kinetic studies,density functional theory simulations,and in-situ Raman spectroscopy are further performed to reveal the K-ion storage mechanism and confirm the critical actions of co-doping B.This work offers the new methods for graphite-electrode design and the deeper insights into their energy storage mechanisms in KIBs.

关键词： Heteroatom dual-doping Graphite anodes K-ion batteries Adsorption and diffusion energy Charge transfer

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

Investigation of Charge transfer between donor and acceptor for small-molecule organic solar cells by scanning tunneling microscopy and ultrafast transient absorption spectroscopy

引用

Nano Research 2022年第9期15卷 8019-8027页

作者： Yuchuan Xiao Linxiu Cheng Xinyu Sui Qi Wang Jie Chen Dan Deng Jianqi Zhang Xuan Peng Xiaokang Li Xunwen Xiao Ke Deng Xinfeng Liu Zhixiang Wei Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Jiangxi Provincial Key Laboratory of Low-Carbon Solid Waste Recycling School of Geography and Environmental EngineeringGannan Normal UniversityGanzhou 341000China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China College of Chemistry and Chemical Engineering Gannan Normal UniversityGanzhou 341000China School of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211China

Small-molecule organic solar cell is a category of clean energy potential device since Charge transfers between donor and acceptor.The morphologies,co-assembly behavior,interaction sites,and Charge transfer of BTID-nF(n=1,2)/PC71BM donor-acceptor system in the active layer of organic solar cell have been studied employing scanning tunneling microscopy(STM),scanning tunneling spectroscopy(STS),density functional theory(DFT)calculations,and transient absorption(TA)spectroscopy.The results show that BTID-1F and BTID-2F form bright strip structures,whereas BTID-nF(n=1,2)/PC71BM form ridge-like structures with each complex composed of one BTID-nF(n=1,2)molecule and four PC71BM molecules which adsorbed around the BTID-nF(n=1,2)molecule by S···πinteraction.With the assistance of S···πinteraction between BTID-nF(n=1,2)and PC71BM,BTID-nF(n=1,2)/PC71BM co-assembled ridge-like structures are more stable than the BTID-nF(n=1,2)ridge structures.To investigate the Charge transfer of BTID-nF(n=1,2)/PC71BM system,STS measurements,DFT calculation,and TA spectroscopy are further performed.The results show that Charge transfer occurs in BTID-nF(n=1,2)/PC71BM system with the electron transferring from BTID-nF(n=1,2)molecules to PC71BM.

关键词： organic solar cells scanning tunneling microscopy transient absorption spectroscopy Charge transfer donor-acceptor system

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

Molecule configurations modulate packing array and Charge transfer in cocrystal engineering

引用

Science China Chemistry 2024年第2期67卷 512-516页

作者： Shenglong An Mengyuan Qiao Xin Jin Xuanying Chen Jianhua Su Lifang Guo Zhiyun Zhang Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CentreFrontiers Science Center for Materiobiology and Dynamic ChemistryEast China University of Science&TechnologyShanghai200237China

Organic cocrystal as an emerging assembly strategy has received increasing attention in constructing multiple functional materials,through continually screening suitable constituent monomers or changing their stoichiometry ratios.However,the role of molecule configuration in the cocrystal field is rarely explored despite the fascinating potential in regulating the packing mode.In this study,the N,N′-diphenyl-5,10-dihydrophenazine derivatives(DPPs) with the flexible scaffold and different methyl substitutions are selected as the donors bearing various molecular configurations.In a simple collaborative way,a series of cocrystals based on DPPs and OFN(octafluoronaphthalene) are fabricated,exhibiting two self-adaptive molecular stacking arrays.X-ray crystallographic analysis and theoretical calculation unveil their different π···π interactions and Charge transfer characters,leading to the significant emission redshift up to 125 nm compared with individual DPPs.As a result,controllable molecule stacking structure,tunable emission,and Charge transfer properties can be achieved.The study provides a new perspective to reveal the structure-property relationships at the molecular level by controlling the molecule configuration in cocrystal engineering,contributing to the development of cocrystal theoretical physics and organic functional materials.

关键词： cocrystals molecular configuration self-adaptive packing mode Charge transfer

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

Efficient Charge transfer in WS2/WxMo1-xS2 heterostructure empowered by energy level hybridization

引用

Science China(Information Sciences) 2023年第2期66卷 219-226页

作者： Xuhong AN Yehui ZHANG Yuanfang YU Weiwei ZHAO Yutian YANG Xianghong NIU Xuan LUO Junpeng LU Jinlan WANG Zhenhua NI School of Physics and Key Laboratory of MESMS of the Ministry of Education Southeast University New Energy Technology Engineering Laboratory of Jiangsu Province and School of Science Nanjing University of Posts and Telecommunications Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences

Photoinduced Charge transfer(CT) is decisive to the efficiency and speed of photoelectric conversion in two-dimensional(2D) van der Waals(vd Ws) heterostructures. Generally, CT rate enhancement is realized by increasing the band offset(BO). In this study, we propose that a fast and efficient CT can be realized via strong hybridization of energy levels in 2D vd Ws heterostructures with minimal BO. Firstprinciples calculations reveal that the smallest energy difference between conduction-band edges and minimal BO in the WS2/WxMo1-xS2(x = 0.78) heterostructure yields the strong hybridization of energy levels and then results in ultrafast CT(2.7 ps). Experimental results agree with theoretical calculations. The photoluminescence of WS2is quenched in the WS2/WxMo1-xS2(x = 0.78) heterostructure, attributable to the strong hybridization-induced fast and efficient CT. This study provides insights into the mechanism of CT in heterostructures and offers new strategies to create superior optoelectronic devices with fast and efficient photoelectric conversion.

关键词： van der Waals heterostructure band offset hybridization strength Charge transfer photoluminescence quenching

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Boosting the photo-induced Charge transfer in melon by lengthening the melon chains through a facile regrowth approach

引用

Nano Research 2023年第2期16卷 2076-2084页

作者： Tongtong Li Shulan Wang Li Li Xiaohua Yu Huaze Zhu Ningdong Feng Ju Rong Yongqiang Yang Gang Liu Department of Chemistry College of ScienceNortheastern UniversityShenyang 110819China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China School of Metallurgy Northeastern UniversityShenyang 110819China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics Wuhan Center for Magnetic Resonance Key Laboratory of Magnetic Resonance in Biological SystemsWuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071China

Melon-derived carbon nitride photocatalysts are a kind of star layered materials applied in solar energy conversion.With in-planeπorbitals of the heptazine subunits and their overlap along the melon chains being the most distinctive feature,the condition of melon chains is of great importance for the atomic and energy band structures of carbon nitride photocatalysts as well as their photo-activities.In principle,fragmentized melon chains in practical carbon nitride would lead to unfavorable structure disorder both in longitudinal and vertical directions,thus inhibiting the efficient transfer for photo-induced electrons and holes,respectively.Here,with a facile regrowth approach,that is to treat carbon nitride under the atmosphere containing C/N species,the melon chains in carbon nitride were experimentally lengthened,which was reflected by the regularly fraction variation of different nitrogen species derived from X-ray photoelectron spectroscopy(XPS)analysis.The prolonged melon chains led to dramatically improved in-plane structure order and boosted transfer of photo-induced electrons and holes,which were confirmed by the spontaneous photo-deposition of oxidants and reductants.The combination of this regrowth approach with homogenously distributed nitrogen vacancies resulted in much enhanced visible-light-responsive photoactivities.Besides,control experiments using nitrogen-vacancy-free carbon nitride and different C/N-contained precursors showed the compatibility as well as the critical factors for the lengthening effects of the regrowth approach.We hope that the facile but efficient regrowth approach could be widely adopted in melon-derived carbon nitride photocatalysts used for various applications.

关键词： carbon nitride melon chains structure order photocatalytic hydrogen evolution Charge transfer charge separation

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

Advanced Charge transfer technology for highly efficient and long-lived TADF-type organic afterglow with near-infrared light-excitable property

引用

Science China Chemistry 2023年第4期66卷 1120-1131页

作者： Guangming Wang Xuefeng Chen Jiahui Liu Shuhui Ding Kaka Zhang Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China

Heavy atom effects and n-π*transitions have been frequently reported to enhance room-temperature organic phosphorescence efficiency but lead to shortage of phosphorescence lifetimes.Unlike these reported studies,we conceive the incorporation of advanced Charge transfer(CT)technology to boost room-temperature organic afterglow efficiency and simultaneously maintain afterglow lifetimes.Here we design difluoroboronβ-diketonate(BF2bdk)CT compounds with moderate singlet-triplet splitting energy(ΔEST)of around 0.4 e V,and relatively large spin-orbit coupling matrix elements(SOCME(S_(1)-T_(1)),1–10 cm^(-1))to achieve efficient intersystem crossing(ISC)and moderate rates of reverse intersystem crossing(kRISC,1–10 s^(-1)).The advanced CT technology,which includes multiple electron-donating groups and orthogonal donor-acceptor arrangement,have been found to narrowΔESTand enhance both ISC and RISC.Meanwhile,the organic matrices suppress nonradiative decay of BF2bdk’s T1states by their rigid microenvironment.Consequently,thermally activated delayed fluorescence(TADF)-type organic afterglow materials can be achieved with afterglow efficiency up to 83.0%,long lifetimes of 433 ms,excellent processablility,as well as advanced anti-counterfeiting and information encryption.Furthermore,with the aid of up-conversion materials and through radiative energy transfer,TADF-type afterglow materials with aqueous dispersity and near-infrared light-excitable property have been achieved,which paves the way for biomedical applications.

关键词： afterglow Charge transfer phosphorescence TADF triplet excited states

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

Machine learning assisted prediction of Charge transfer properties in organic solar cells by using morphology-related descriptors

引用

Nano Research 2023年第2期16卷 3588-3596页

作者： Lulu Fu Haixia Hu Qiang Zhu Lifeng Zheng Yuming Gu Yaping Wen Haibo Ma Hang Yin Jing Ma Key Laboratory of Mesoscopic Chemistry of Ministry of Education School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Physics Shandong UniversityJinan 250100China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Charge transfer and transport properties are crucial in the photophysical process of exciton dissociation and recombination at the donor/acceptor(D/A)interface.Herein,machine learning(ML)is applied to predict the Charge transfer state energy(ECT)and identify the relationship between ECT and intermolecular packing structures sampled from molecular dynamics(MD)simulations on fullerene-and non-fullerene-based systems with different D/A ratios(RDA),oligomer sizes,and D/A pairs.The gradient boosting regression(GBR)exhibits satisfactory performance(r=0.96)in predicting ECT withπ-packing related features,aggregation extent,backbone of donor,and energy levels of frontier molecular orbitals.The charge transport property affected byπ-packing with different RDA has also been investigated by space-charge-limited current(SCLC)measurement and MD simulations.The SCLC results indicate an improved hole transport of non-fullerene system PM6/Y6 with RDA of 1.2:1 in comparison with the 1:1 counterpart,which is mainly attributed to the bridge role of donor unit in Y6.The reduced energetic disorder is correlated with the improved miscibility of polymer with RDA increased from 1:1 to 1.2:1.The morphology-related features are also applicable to other complicated systems,such as perovskite solar cells,to bridge the gap between device performance and microscopic packing structures.

关键词： Charge transfer charge transport packing modes machine learning organic solar cells

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

Significantly enhanced Charge transfer efficiency and surface reaction on NiP_(2)/g-C_(3)N_(4) heterojunction for photocatalytic hydrogen evolution

引用

Chinese Journal of Chemical Engineering 2022年第3期35卷 31-39页

作者： Xiaoqing Yan Hua An Zihao Chen Guidong Yang XJTU-Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China

In this work,a novel NiP_(2)/g-C_(3)N_(4)heterojunction via homogeneous precipitation method assisted by thermal phosphorization reaction was designed and constructed,and the optimized sample showed the excellent photocatalytic H_(2)evolution activity under visible-light irradiation,which was nearly 112 times higher than that of pristine g-C_(3)N_(4)sample.Experimental characterizations and DFT calculations demonstrated that the NiP_(2)nanoparticles covered on the g-C_(3)N_(4)surface can form a built-in electric field at the interface to accelerate the transfer of photoexcited electrons from g-C_(3)N_(4)to NiP_(2),crucial for hindering the recombination of electron-hole pairs.Moreover,the energy barrier of hydrogen evolution reaction can also vastly reduce when combined NiP_(2)and g-C_(3)N_(4)to construct NiP_(2)/g-C_(3)N_(4)heterojunction.This work represents a method through combing experimental and theoretical tools to thoroughly investigate the mechanism of photocatalytic process.

关键词： Carbon neutrality Charge transfer Internal electric field Photocatalytic H_(2)generation

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

共晶工程:多重刺激下裁剪共晶中电荷转移作用构筑高灵敏度发光开关材料

引用

Science China Materials 2022年第5期65卷 1320-1328页

作者：张伊晗吴红男孙雅静李舒豫刘思郑磊孙玲杰杨方旭张小涛胡文平 Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China School of Chemistry and Chemical Engineering Qinghai Minzu UniversityQinghai 810007China

本论文通过溶液自组装方法制备了吖啶-1,2,4,5-四氰基苯共晶(ATC),这种共晶的发光特性对外部刺激(酸/碱蒸气、研磨和热)表现出敏感的反应.通过光谱测试、理论计算和晶体结构研究表明,交替柱排列的ATC存在明显的分子间电荷转移相互作用,... 详细信息

本论文通过溶液自组装方法制备了吖啶-1,2,4,5-四氰基苯共晶(ATC),这种共晶的发光特性对外部刺激(酸/碱蒸气、研磨和热)表现出敏感的反应.通过光谱测试、理论计算和晶体结构研究表明,交替柱排列的ATC存在明显的分子间电荷转移相互作用,这种相互作用在酸蒸气刺激下减弱,而在机械研磨外力作用下增强,实现了外界刺激下分子间作用力的可逆调控.此外,该共晶的响应时间为秒级,远优于先前报道的大多数刺激响应型共晶.因此, ATC在多种刺激下表现出高灵敏的荧光切换,为开发智能材料提供了一种有效的策略.

关键词： organic cocrystal Charge transfer stimuli-responsive behavior smart materials

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

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

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

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：