检索结果-内蒙古大学图书馆

Exfoliated multi-layered graphene anode with the broadened delithiation voltage plateau below 0.5 V

Journal of Energy Chemistry 2020年第10期29卷 233-242页

作者： Xinlong Ma Xinyu Song Yushu Tang Enzuo Liu Chenggen Xu Chuanlei Qi Yun Li Jinsen Gao Yongfeng Li State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051JiangsuChina School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin UniversityTianjin 300072China

The commercial graphite(CG)is the conventional anode material for lithium ion batteries(LIBs)due to its low delithiation voltage plateau(below 0.5 V)and extraordinary ***,the further promotion of energy density of LIBs is restricted by the limited capacity below 0.5 V of ***,based on the supercritical CO2 exfoliation technique,the production of multi-layered graphene(MLG)is achieved from the pilot scale production *** great merit of the exfoliated MLG anode is that the voltage plateau below 0.5 V is broadened obviously as compared to those of natural graphite and ***,no obvious lithium dendrites are observed for MLG during the lithiation *** large delithiation capacity under the low voltage plateau of MLG is mainly benefited from the combination of Li intercalation and boundary storage mechanism,which is further confirmed by the density functional theory *** LiFePO4/MLG full cell can afford the satisfactory electrochemical property with respect to the capacity,energy density and ultralong cycling stability(90%capacity retention after 500 cycles at 2 C),significantly better than that of LiFePO4/***,this developed technique not only dedicates to producing the high-performance anode for LIBs but also opens a door for the mass production of MLG in the industrial scale.

关键词： Multi-layered graphene Supercritical CO2 exfoliation Anode Broadened delithiation voltage plateau Intercalation and boundary storage

来源：评论

学校读者我要写书评

暂无评论

Rapid construction of highly-dispersed cobalt nanoclusters embedded in hollow cubic carbon walls as an effective polysulfide promoter in high-energy lithium-sulfur batteries

引用

Nano Research 2022年第6期15卷 5105-5113页

作者： Lin Sun Yanxiu Liu Kaiqiang Zhang Feng Cheng Ruiyu Jiang Yangqing Liu Jing Zhu Zhong Jin Huan Pang Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province School of Chemistry and Chemical EngineeringYancheng Institute of TechnologyYancheng 224051China MOE Key Laboratory of Mesoscopic Chemistry MOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China

The ultrahigh specific energy density and low cost of lithium-sulfur batteries are suitable for the next generation of energy ***,the shuttle issue and sluggish conversion kinetics of polysulfides remain *** metal nanoclusters with strong polarity in conductive porous carbon is an effective strategy for tackling such knotty ***,we design and synthesize hollow cubic carbon embedded with highly dispersed cobalt nanoclusters as an effective sulfur reservoir for lithium sulfur *** large cavity structure and well-dispersed cobalt nanoclusters,with uniform sizes near 11 nm,enable the hosting structure to hold the high sulfur loading,70%capacity retention after 500 cycles at 2 C with a high sulfur loading of 6.5 mg·cm^(−2),effective stress release,accelerated polysulfide conversion,superior rate performance,strong physical confinement and chemical absorption *** density functional theoretical calculations demonstrate that the welldispersed cobalt nanoclusters in the hosting structure play a critical electrocatalytic role in boosting the capability of absorbing and converting polysulfides.

关键词： lithium-sulfur battery electrocatalysis Co nanocluster hollow carbon shuttle effect

来源：评论

学校读者我要写书评

暂无评论

An Allochroic Molecular Cage Switch for Sensing and Capturing Organic Pollutants

引用

Chemical Research in Chinese Universities 2023年第2期39卷 310-317页

作者： JIA Yin FENG Fanda SONG Xinyu SHI Zhiqiang SUN Lin JIANG Ruiyu TANG Lanqin ZHANG Lei Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng224051China State Key Laboratory of Coordination Chemistry Nanjing National Laboratory of MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210093China

The adsorption method is considered to be one of the most promising organic pollutants emission reduction *** design and synthesis of high-performance porous adsorbents are one of the most important but challenging *** this work,we constructed a new class of porous molecular cage switches by a simple reaction using phenolphthalein as the raw *** molecular cage switches displayed interesting on-off behavior towards organic guests,which is highly responding to organic pollutants with rapid color change and is also able to adsorb these organic pollutants through an open-to-close *** molecular cage switch also has excellent regenerative cycling properties and water resistance,which is expected to be employed in the handling of organic pollutants in the future.

关键词： Porous organic cage Molecular switch Phenolphthalein Organic pollutant Sensor

来源：评论

学校读者我要写书评

暂无评论

Hierarchically porous carbon foams for electric double layer capacitors

引用

Nano Research 2016年第10期9卷 2875-2888页

作者： Feng Zhan Tianyu Liu Guihua Hou Tianyi Kou Lu Yue Rongfeng Guan Yat Li Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Yancheng 224051 China Department of Chemistry and Biochemistry University of California Santa Cruz 1156 High Street Santa Cruz CA 95064 USA

The growing demand for portable electronic devices means that lightweight power sources are increasingly sought after. Electric double layer capacitors （EDLCs） are promising candidates for use in lightweight power sources due to their high power densities and outstanding charge/discharge cycling stabilities. Three-dimensional （3D） self-supporting carbon-based materials have been extensively studied for use in lightweight EDLCs. Yet, a major challenge for 3D carbon electrodes is the limited ion diffusion rate in their internal spaces. To address this limitation, hierarchically porous 3D structures that provide additional channels for internal ion diffusion have been proposed. Herein, we report a new chemical method for the synthesis of an ultralight （9.92 mg/cm3） 3D porous carbon foam （PCF） involving carbonization of a glutaraldehyde- cross-linked chitosan aerogel in the presence of potassium carbonate. Electron microscopy images reveal that the carbon foam is an interconnected network of carbon sheets containing uniformly dispersed macropores. In addition, Brunauer-Emmett-Teller measurements confirm the hierarchically porous structure. Electrochemical data show that the PCF electrode can achieve an outstanding gravimetric capacitance of 246.5 F/g at a current density of 0.5 A/g, and a remarkable capacity retention of 67.5% was observed when the current density was increased from 0.5 to 100A/g. A quasi-solid-state symmetric supercapacitor was fabricated via assembly of two pieces of the new PCF and was found to deliver an ultra-high power density of 25 kW/kg at an energy density of 2.8 Wh/kg. This study demonstrates the synthesis of an ultralight and hierarchically porous carbon foam with high capacitive performance.

关键词： hierarchically porouss tructure glutaraldehyde-crosslinked chitosan light weight carbon foam electrical double layer capacitors

来源：评论

学校读者我要写书评

暂无评论

Effect of Cu Valence States on Conduction Band Position and Reduction Selectivity of TiO 2 -based Heterojunction Photocatalysts

引用

iScience 2025年

作者： Hong Qian Binxia Yuan Yuhao Liu Li Wang Rui Zhu Pengyu Dong College of Energy and Mechanical Engineering Shanghai University of Electric Power Shanghai 201306 P. R. China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Yancheng 224051 P. R. China

TiO 2 has low photocatalytic activity due to its easy recombination of photogenerated charges and low visible light utilization efficiency. This study utilized the keto-enol tautomerism principle of fructose in an alkaline environment to successfully obtain Cu 2 O/TiO 2 (CT), Cu 2 O/TiO 2 /Cu (CTC), and TiO 2 /Cu (TC) catalysts. As Cu(I) transformed into Cu(0), the bandgap narrowed, significantly enhancing visible light absorption. Photocatalytic tests showed that CT-0.15 exhibited the highest hydrogen production rate (279.53 μmol g -1 h -1 ), which was 25.18 times higher than that of TC-2. However, CTC-1 had the highest CO production rate (10.58 μmol gg -1 h -1 ). Optoelectronic test revealed that CT-0.15 and CTC-1 had higher separation efficiency of photogenerated exciton. DFT calculations indicated that the change in the valence state of Cu influenced the reaction mechanism, with CT being favorable for the adsorption of H + in HER and CTC promoting the adsorption of CO 2 in CO2RR.

关键词： Cu 2 O/TiO 2 Cu 2 O/TiO 2 /Cu TiO 2 /Cu heterostructure photocatalysis

来源：评论

学校读者我要写书评

暂无评论

Effects of hydrothermal temperature on formation and decoloration characteristics of anatase TiO_2 nanoparticles

引用

Science China(Technological Sciences) 2012年第4期55卷 894-902页

作者： LU HongBin ZHOU YouZhen VONGEHR Sascha TANG ShaoChun MENG XiangKang National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringNanjing UniversityNanjing 210093China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Department of Materials EngineeringYancheng Institute of TechnologyYancheng 224003China

This paper describes the effects of temperature on the complex intermediate processes from the precursor to the fully-crystallized anatase TiO2 nanoparticles in hydrothermal synthesis. The anatase TiO2 nanoparticles were synthesized in a wide temperature range below 230°C. The composition, morphology, and methylene blue (MB) decoloration characteristics of the obtained products were investigated by X-ray diffraction, Fourier transform infrared spectroscope, X-ray photoelectron spectroscope, and scanning and transmission electron microscope. The dehydrating polycondensation of Ti(IV)-hydrates and the decomposition of (NH4)2Ti3O7 intermediates with the temperature increase lead to the direct formation of anatase TiO2 nanoparticles under the hydrothermal environments. The strong MB decoloration of the hydrothermal products obtained at the low (≤130°C) and high (≥180°C) temperatures are attributed to the adsorption of Ti(IV)-hydrates and the photocatalysis of anatase TiO2 nanoparticles, respectively.

关键词： anatase TiO2 nanoparticles hydrothermal synthesis decoloration adsorption photocatalysis

来源：评论

学校读者我要写书评

暂无评论

Effects of local matrix environment on the spectroscopic properties of ensemble to single-particle level carbon dots

引用

Chinese Chemical Letters 2022年第2期33卷 751-756页

作者： Zhihong Wei Boyang Wang Mingcai Xie Daocheng Hong Xin Yang Sushu Wan Weiqing Yang Siyu Lu Yuxi Tian Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringJiangsu Key Laboratory of Vehicle Emissions ControlNanjing UniversityNanjing 210023China Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China

Carbon dots(CDs), because of their unique properties, are being rapidly developed as important luminescent materials for imaging, sensing, and use in photonic devices. However, most of the reported fundamental properties of the CDs are results of investigations conducted in the solution state, which may be completely different from those conducted in the solid state. In this work, we study the luminescence properties, photostability, and the dynamics of CDs in different matrix environments, from ensemble to the single-particle level. We observed that the properties associated with the emission centers and photostability of CDs were extremely sensitive to the local chemical environment. A better understanding of the dependence of the spectroscopic properties of CDs on the complex local chemical environment is an important step toward finding new ways of controlling the optical properties of CDs and optimizing their use in various applications.

关键词： Carbon dots Matrix effects Single-particle Photostability Blinking

来源：评论

学校读者我要写书评

暂无评论

Effect of Glutinous Rice Flour on Mechanical Properties and Microstructure of Cement-based Materials

引用

Journal of Wuhan University of technology(Materials Science) 2023年第2期38卷 394-400页

作者： FENG Qi LU Bao WANG Dan Guangxi Key Lab of Road Structure and Materials Guangxi Transportation Science and Technology Group Co.LtdNanning5300007China Key Laboratory for Advanced Technology in Environment Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng224051China Special Glass Key Lab of Hainan Province&State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou570228China

The mechanism of glutinous rice flour,a kind of natural admixture,on the hydration process,setting time,and microstructure of the Portland cement was *** experimental results show that the glutinous rice flour has an obvious setting retarding effect on cement *** optimal dosage of the glutinous rice flour is 3wt%.In this case,the initial and final setting time of the paste are delayed by 140 and185 min,*** flexural and compressive strengths of the hardened paste are increased by 0.35%and 0.07%after 56 d of *** glutinous rice flour hinders the mineral dissolution process and decreases the concentration of calcium ion at the initial stage of hydration due to the complexation effect,thereby hindering the nucleation and growth of CH and C-S-H phases and prolonging the hydration ***,C-S-H phases combine with the glutinous rice flour to contribute the bonding effect together,which compacts the microstructure of hardened cement pastes at the later hydration stage of cement ***,in-depth investigation on the utilization of glutinous rice flour as the admixture for the Portland cement is expected to be meaningful for the control of hydration exothermic rate and setting time.

关键词： glutinous rice flour cement-based materials mechanical properties setting time

来源：评论

学校读者我要写书评

暂无评论

Synthesis, Characterization and Evaluation of Sulfur Transfer Catalysts for FCC Flue Gas

引用

China Petroleum Processing & Petrochemical technology 2014年第2期16卷 59-64页

作者： Jiang Ruiyu Shan Honghong Zhang Jiling Yang Chaohe Li Chunyi Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China) East-China Design Branch China Petroleum Engineering Construction Corporation

In this work, Zr-M(M=Cu, Mn, Ce) type sulfur transfer agent was prepared by impregnation method. Under the condition similar to that in the regenerator of FCC units, the influence of different active metal components and their contents on sulfur transfer agent were investigated. Moreover, the crystalline structure of sulfur transfer agent was characterized by X-ray diffraction(XRD) and Fourier transforms infrared spectroscopy(FT-IR). The result showed that the Zr-Mn sulfur transfer agent could effectively reduce the SO2 content in FCC regenerator flue gas, featuring high SO2 adsorption capacity. The sulfur transfer agent was inactivated in 40—60 min during the test. In the course of reduction reaction, after several reaction cycles, the formation of SO2 ceased and only H2 S was detected as the reduction product.

关键词： fluid catalytic cracking sulfur-transfer catalyst flue gas zirconium

来源：评论

学校读者我要写书评

暂无评论

Rapid Colorimetric Recognition of Tetrafluoroborate in Water Based on a Phenol Red Derivative

引用

Tetrahedron 2025年

作者： Jiabin Lu Qi Liu Meipin Liu Lanqin Tang Lin Sun Xinyu Song Ruiyu Jiang Lei Zhang Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province and Department of Chemistry and Chemical Engineering Yancheng Institute of Technology Yancheng 224051 P. R. China Key Laboratory of Jiangxi University for Function Materials Chemistry College of Chemistry and Chemical Engineering Gannan Normal University Ganzhou 341000 P.R. China

Anion recognition in water by artificial receptors with high binding affinities remains challenging. Herein, we report a water-soluble colorimetric anion receptor synthesized via one-step aldehyde functionalization of phenol red (PS), characterized by NMR, MS, FTIR, and TGA. The modified receptor (MPS) exhibits solvent-, pH-, and anion-responsive chromism, contrasting with unmodified PS. MPS enables rapid BF 4 - recognition in pure water, inducing a distinct red-to-yellow color change. UV-vis titration reveals a 1:1 binding stoichiometry with an ultrahigh affinity of 2.7 × 10 6 M -1 , surpassing most reported receptors. MPS achieves a BF 4 - detection limit of 10 -5 M and maintains selectivity against common anions and cations. This work provides a strategy for designing high-performance aqueous-phase anion sensors.

关键词：

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：