检索结果-南通市图书馆

Science china chemistry 2009年第12期52卷 2148-2155页

作者： wang chenglin1,sun lan1,{2.,2.1 department of chemistry,college of chemistry and Chemical engineering,xiamen university,xiamen 361005,china 2.State Key Laboratory of Physical chemistry of Solid Surfaces,xiamen university,xiamen 361005,china 1. department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China 2. State Key Laboratory of Physical chemistry of Solid Surfaces Xiamen University Xiamen 361005 China

A constant current electrochemical deposition was employed to incorporate CdS nanoparticles into the TiO2.nanotube arrays (TiO2.Ts). The size and amount of CdS nanoparticles in TiO2.Ts (CdS@TiO2.Ts) were controllable via modulating current,deposition time and electrolyte concentration. It was revealed,from the scanning electron microscopy (SEM) images and X-ray photoelectron spectroscopy (XPS) in depth profile,that CdS nanoparticles were filled into TiO2.nanotubes. A shift of the absorption edge toward the visible region under the optimal electrodeposition condition was observed with the diffuse reflectance spectroscopy (DRS). A 5-fold enhancement in the photocurrent spectrum for TiO2.Ts was observed and the photocurrent response range was significantly extended into the visible region because of the CdS incorporation. Compared with pure TiO2.Ts,under a visible light irradiation,CdS@TiO2.Ts exhibited a 3.5-fold improvement of photocatalytic activity,which was demonstrated by the photocatalytic decomposition of Rhodamine B (RhB).

关键词： TiO2 nanotube CdS photocatalysis RhB

Molecular solid solution of lanthanide-titanium-oxo clusters with enhanced photocatalytic hydrogen evolution

在线全文

学校读者我要写书评

暂无评论

Science china chemistry 2024年第2期67卷 529-535页

作者： Rong Chen Chao-Long Chen Hui Zhang Zi-Han wang Fu-Li sun Ming-Hao Du Gui-{2. Zhuang Cheng wang La-Sheng Long lan-sun Zheng Xiang-Jian Kong Collaborative Innovation Centre of chemistry for Energy Materials State Key Laboratory of Physical chemistry of Solid Surfaces and {2. of chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China college of Chemical engineering Zhejiang University of TechnologyHangzhou310032China

Molecular solid solutions of metal clusters containing different metal centers with well-defined structures can accurately regulate the HOMO-LUMO gap,but are rarely ***,a series of colorless lanthanide-titanium-oxo clusters Ln_(2.Ti_4(μ_(2.-O)_(2.(μ_(3)-O)_4(Piv)_(10)(THF)_(2.(Ln_(2.Ti_4,Ln = Eu,Gd,Tb,and Ce,HPiv = pivalic acid) were synthesized by the reaction of pivalic acid with Ln(Ac)_(3) and titanium *** light yellow crystal of cluster solid solutions Eu_(2.Ti_(4-x)Cd_(x),containing a mixture of Eu_(2.Ti_4 and Eu_(2.Ti_(3)Cd,was obtained by in situ doping Cd^(2.) and S^(2.).Eu_(2.Ti_(3.92.Cd_(0.08) displays efficient photocatalytic hydrogen evolution activity without a co-catalyst,which is up to 2.6 times that of Eu_(2.Ti_*** time-resolved transient absorption spectroscopy and spin-polarized density functional calculations showed that the enhanced photocatalytic performance of Eu_(2.Ti_(4-x)Cd_(x) can be attributed to the narrower HOMO-LUMO gap and lower LUMO position than that of Eu_(2.Ti_*** studyprovides an in situ doping method to realize the simple preparation of cluster solid solution.

关键词： molecular solid solution lanthanide-titanium-oxo clusters photocatalytic hydrogen evolution

Al_2._3-TiO_2.composite oxide films on etched aluminum foil fabricated by electrodeposition and anodization

在线全文

学校读者我要写书评

暂无评论

Science china chemistry 2011年第10期54卷 1558-1564页

作者： BU JunFu sun lan WU Qi {2. MengYe lin changjian department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China State Key Laboratory of Physical chemistry of Solid Surfaces Xiamen University Xiamen 361005 China

Ti species have been deposited on low-voltage etched aluminum foils by a simple electrochemical method using a Ti anode as Ti source in a Ti-free I2.dissolved acetone solution. After annealing at 500-600℃ in air, an Al2.3-TiO2.composite oxide film was formed on the surface of the etched aluminum foil by anodizing galvanostatically in an ammonium adipate solution. The effects of I2.concentration in the acetone solution, applied anode voltage, electrolysis time, and annealing temperature on the specific capacitance of the aluminum anode foils were investigated. The TiO2.deposited specimens prepared by applying a po-tential of 50V for 3 min in 2.5m MI2.added acetone solution followed by annealing at 550℃ after anodization exhibited the highest specific capacitance, with an enhancement of 2.% compared with pure etched aluminum foil specimens. The electro-deposition process and the change of the anode voltage during the anodization were analyzed.

关键词： electrodeposition titanium oxide composite film aluminum electrolytic capacitor anodization

Sniffing with mass spectrometry

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2018年第20期63卷 1351-1357页

作者： Miao-Miao Chen Hai-Feng Su Ying xie Li-Fang He Shui-Chao lin Mei-lin Zhang Cheng wang Su-Yuan xie Rong-Bin Huang lan-sun Zheng State Key Laboratory for Physical chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University School of Information Science and engineering Xiamen University

Gaseous compounds are usually on-line detectable on sensors. The limitations of conventional sensors are suffering from incapability for exactly identifying multiple components as well as incompatibility to possible toxicants in every odor sample. Herein, we discuss an inlet modification to the laboratory standard mass spectrometer, inspired by the sensitive olfactory systems of animals, for direct sniffing,established by connecting a mini pump to the nebulizer gas tubing. The modified mass spectrometry method—sniffing-mass spectrometry(sniffing-MS)—can acquire detailed fingerprint spectra of mixed odors and shows high tolerance to toxicants. Furthermore, the method has a low limit of detection in the order of parts per trillion and is a ‘sampling-free' technique for analyzing various gaseous compounds simultaneously, thus offering versatility for smelling daily commodities, tracking diffusion, and locating position of odors. Sniffing-MS can mimic or even surpass the olfaction of animals and is applicable for analyzing gaseous/volatile compounds, especially those polar compounds, in a simple manner depending on the intrinsic molecular mass-to-charge ratio.

关键词： Ambient mass spectrometry Volatile compounds Gas source locating On-line monitoring Olfaction

Cross-linkable fullerene interfacial contacts for enhancing humidity stability of inverted perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第7期40卷 1691-1697页

作者： Ming-Wei An Zhou Xing Bao-Shan Wu Fang-Fang xie Shan-Yu Zheng lin-Long Deng Xu {2. Bin-Wen Chen Da-Qin Yun Su-Yuan xie Rong-Bin Huang lan-sun Zheng State Key Laboratory for Physical chemistry of Solid Surfaces iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China college of Energy Xiamen UniversityXiamen 361005China

In situ cross-linking encapsulation has been demonstrated to be an efficient strategy for enhancing the humidity stability of perovskite solar cells(PSCs).In this study,a novel cross-linkable fullerene derivative,namely1-(p-benzoate-(p-methylvinylbenzene)-indolino[2.3][60]fullerene(FPPS),was readily synthesized from commercially available building blocks in two *** FPPS was employed as an interfacial modifier on perovskite surfaces in inverted planar p-i-n *** to the fast interfacial charge extraction and efficient trap passivation,PSCs based on the cross-linked FPPS(C-FPPS)exhibited excellent *** PSCs had a top-performing power conversion efficiency(PCE)of 17.82.with negligible hysteresis,compared to the control devices without C-PFFS(16.99%).Moreover,the strong water resistance of the C-FPPS interfacial layer distinctly enhances the ambient stability of PSC devices,exhibiting a t80(the time required to reach 80%of the initial PCE)of 300 h under high-humidity *** significantly surpasses the control devices,whose t80 was only 130 *** results demonstrate that cross-linkable fullerene derivatives can be promising interfacial materials for designing high-efficiency,hysteresis-free,air-stable PSCs.

关键词： Perovskite solar cells Cross-linkable fullerene Fullerene interlayer Power conversion efficiency Humidity stability

Stereomeric effects of bisPC_(71)BM on polymer solar cell performance

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2016年第2期61卷 132-138页

作者： lin-Long Deng Xiang Li Shuai wang Wen-Peng Wu Si-Min Dai Cheng-Bo Tian Yi Zhao Su-Yuan {2. Rong-Bin Huang lan-sun Zheng Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University State Key Lab for Physical chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Institute of Environmental and Analytical Sciences College of Chemistry and Chemical Engineering Henan University

Two stereomers of bisadduct analogues of [6, 6]-phenyl-C71-butyric acid methyl ester （bisPC71BM） were synthesized and their geometrical structures with cis- or trans-configuration were identified by X-ray crystallogra- phy. Although both of the bisPC71BM have similar spec- trometric and electrochemical properties, the spatial orientation of the two addition groups on C7o has impact on crystal packing and molecular assembly of bisPC71BM isomers and, in turn, photovoltaic performance in polymer solar cell based on poly（3-hexylthiophene）（P3HT）（with power conversion efficiency of 1.72.% and 1.84 % for the solar cells involving cis- and trans-bisPC71BM, respec- tively）. Although the power conversion efficiency remains to be improved, this work exemplifies that the photovoltaic properties of fullerene-based electron acceptors areinfluenced by aggregation of the stereomeric molecules and thus extends the guidelines for rational design of efficient fullerene acceptor.

关键词： Polymer solar cells Fullerenederivative Electron acceptor Stereomeric effectsX-ray crystallography

Integration of bio-inspired lanthanide-transition metal cluster and P-doped carbon nitride for efficient photocatalytic overall water splitting

在线全文

学校读者我要写书评

暂无评论

National Science Review 2021年第9期8卷 41-49页

作者： Rong Chen Gui-lin Zhuang Zhi-Ye wang Yi-Jing Gao Zhe Li Cheng wang Yang Zhou Ming-Hao Du Suyuan Zeng La-Sheng Long Xiang-Jian Kong lan-sun Zheng Collaborative Innovation Center of chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University college of Chemical engineering Zhejiang University of Technology college of chemistry and Chemical {2. Liaocheng University

Photosynthesis in nature uses the Mn4CaO5cluster as the oxygen-evolving center to catalyze the water oxidation efficiently in photosystem II. Herein, we demonstrate bio-inspired heterometallic Ln Co3(Ln=Nd, Eu and Ce) clusters, which can be viewed as synthetic analogs of the Ca *** Ln Co3on phosphorus-doped graphitic carbon nitrides (PCN) shows efficient overall water splitting without any sacrificial reagents. The Nd Co3/PCN-c photocatalyst exhibits excellent water splitting activity and a quantum efficiency of 2.0%at 350 nm. Ultrafast transient absorption spectroscopy revealed the transfer of a photoexcited electron and hole into the PCN and Ln Co3for hydrogen and oxygen evolution reactions, respectively. A density functional theory (DFT) calculation showed the cooperative water activation on lanthanide and O-O bond formation on transition metal for water oxidation. This work not only prepares a synthetic model of a bio-inspired oxygen-evolving center but also provides an effective strategy to realize light-driven overall water splitting.

关键词： bio-inspired lanthanide-transition metal cluster photocatalytic overall water splitting synergistic effects oxygen-evolving center

Carbonate-Water Supramolecule Trapped in Silver Nanoclusters Encapsulating Unprecedented Ag_(11) Kernel

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

CCS chemistry 2020年第1期2卷 663-672页

作者： Zhi wang Hai-Feng Su Gui-lin Zhuang Mohamedally Kurmoo Chen-Ho Tung Di {2. lan-{2. Zheng Key Laboratory of Colloid and Interface chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringState Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100(China) State Key Laboratory for Physical chemistry of Solid Surfaces and department of chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005(China) college of Chemical engineering and Materials Science Zhejiang University of TechnologyHangzhou 310032(China) Institut de Chimie de Strasbourg Universitéde StrasbourgCNRS-UMR 717767008 Strasbourg Cedex(France)

In the absence of inorganic anion templates and in high pH condition(pH∼14),an unprecedented carbonate-hydrate supramolecule,[(CO_(3))_(2.(H_(2.O)]^(4−),trapped from atmospheric CO_(2.,found to play an anion templating role to support the architecture of two related silver(Ag)nanoclusters(SD/Ag54a and SD/Ag55a),which are coprotected by the same organic ligands but differ by one silver atom of the metallic ***[(CO_(3))_(2.(H_(2.O)]^(4−)supramolecules are trapped into two Ag/tBuPhS/dppm pods,connected by a pair of face-shared silver pentagonal bipyramids(Ag_(11))into peanut-shaped silver ***,the equatorial Ag_(11) kernel represents a new embryonic ultrasmall silver nanocluster that is thought to follow a special facesharing growth fashion from pentagonal bipyramidal Ag7 subunit,which is also structurally elucidated in another new Ag44 nanocluster(SD/Ag44c)obtained in similar assembly system just changing tBuPhS−to iPrPhS−*** isolation of SD/Ag54a and SD/Ag55a were associated with:(1)supramolecule induction and(2.reductive and carbonate-rich assembly ***,this work brings a fresh perspective on the role of carbonate-water anion supramolecule in directing the assembly of silver ***,it realizes the control of reduction kinetics and kernel growth using multiple weak reductants and thiolate ***,it provides a possible face-shared growth route for ultrasmall silver nanoclusters.

关键词： silver nanocluster supramolecule anion-water cluster carbonate

Tuning the electron transport behavior at Li/LATP interface for enhanced cyclability of solid-state Li batteries

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 2023年第1期16卷 1634-1641页

作者： linshan Luo Feng Zheng Haowen Gao Chaofei lan Zhefei {2. Wei Huang Xiang Han Ziqi Zhang Pengfei Su Peng wang Shengshi Guo Guangyang lin Jianfang Xu Jianyuan wang Jun Li Cheng Li Qiaobao Zhang Shunqing Wu Ming-Sheng wang Songyan Chen department of Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient DevicesKey Laboratory of Low Dimensional Condensed Matter Physics(Department of Education of Fujian Province)Jiujiang Research InstituteXiamen UniversityXiamen 361005China State Key Lab of Physical chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005China college of Materials Science and engineering Nanjing Forestry UniversityNanjing 210037China Western Digital Corporation 951 Sandisk DrMilpitasCA 95035USA

An interlayer is usually employed to tackle the interfacial instability issue between solid electrolytes(SEs)and Li metal caused by the side ***,the failure mechanism of the ionic conductor interlayers,especially the influence from electron penetration,remains largely ***,using Li1.3Al0.3Ti1.7(PO4)3(LATP)as the model SE and LiF as the interlayer,we use metal semiconductor contact barrier theory to reveal the failure origin of Li/LiF@LATP interface based on the calculation results of density functional theory(DFT),in which electrons can easily tunnel through the LiF grain boundary with F vacancies due to its narrow barrier width against electron injection,followed by the reduction of ***,an Al-LiF bilayer between Li/LATP is found to dramatically promote the interfacial stability,due to the highly increased barrier width and homogenized electric field at the ***,the Li symmetric cells with Al-LiF bilayer can exhibit excellent cyclability of more than 2.000 h superior to that interlayered by LiF monolayer(~860 h).Moreover,the Li/Al-LiF@LATP/LiFePO4 solid-state batteries deliver a capacity retention of 83.2.after 350 cycles at 0.5 *** findings emphasize the importance of tuning the electron transport behavior by optimizing the potential barrier for the interface design in high-performance solid-state batteries.

关键词： solid-state electrolyte Li metal LiF Al electron transport interfacial barrier

LaCoO3-TiO2.米管阵列的构筑及可见光光催化性能

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

物理化学学报 2019年第6期35卷 616-623页

作者：弓程向思弯张泽阳孙岚叶陈清林昌健厦门大学化学化工学院化学系固体表面物理化学国家重点实验室福建厦门361005 宁德市师范学院特色生物化工材料福建省重点实验室福建宁德352100

TiO2.米管阵列具有较高的光催化活性,但可见光吸收弱,限制了其太阳能利用和环境应用。窄带隙的钙钛矿(ABO3)型氧化物能够吸收大范围波段的可见光,且稳定性高,但光催化活性低。本文首先采用溶胶-凝胶法合成了LaCoO3纳米颗粒,然后利用电... 详细信息

TiO2.米管阵列具有较高的光催化活性,但可见光吸收弱,限制了其太阳能利用和环境应用。窄带隙的钙钛矿(ABO3)型氧化物能够吸收大范围波段的可见光,且稳定性高,但光催化活性低。本文首先采用溶胶-凝胶法合成了LaCoO3纳米颗粒,然后利用电泳沉积技术将LaCoO3纳米颗粒修饰于TiO2.米管阵列表面,构筑了LaCoO3-TiO2.米管阵列。扫描电子显微镜(SEM)、透射电子显微镜(SEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)的表征结果显示溶胶-凝胶法合成的纳米颗粒为LaCoO3,其尺寸均匀,结晶度高,平均粒径约为100nm。LaCoO3纳米颗粒与TiO2.米管阵列之间的结合力好。紫外可见吸收光谱(DRS)显示,随着电泳沉积时间的延长,LaCoO3-TiO2.米管阵列的吸收带边逐渐红移700nm。可见光下光催化降解甲基橙(MO)的结果表明,电泳沉积15 min制得的LaCoO3-TiO2.米管阵列对MO的光催化效率最高,其降解速率是相同条件下TiO2.米管阵列的4倍。光致发光光谱和电化学阻抗谱证实LaCoO3纳米颗粒的负载有效地促进了光生电荷的分离和传输,可见光光催化活性明显增强。

关键词： LaCoO3 TiO2.米管阵列可见光光催化甲基橙