检索结果-南通市图书馆

Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution

science china(Technological sciences) 2009年第1期52卷 204-209页

作者： du gaoxiang1,3, zheng shuilin2.& ding hao1 1 school of materials science and technology, china university of geosciences (beijing), beijing, 100083, china 2 school of Chemical and Environment Engineering, china university of Mining and technology (beijing), beijing 100083, china 3 Hebei Qinghe Refractory Group Co. Ltd., Xingtai 054804, china 1. school of materials science and technology China University of Geosciences (Beijing) Beijing 100083 China 3. Hebei Qinghe Refractory Group Co. Ltd. Xingtai 054804 China 2. school of Chemical and Environment Engineering China University of Mining and Technology (Beijing) Beijing 100083 China

Silica is the major component of the acid leaching residue of asbestos tailing. The waterglass solution can be prepared by the reaction of the residue with sodium hydroxide aqueous solution. Compared to the high temperature reaction method, this process is environmental friendly and low cost. In this paper, the reaction process of the residue and the sodium hydroxide aqueous solution is optimized. The optimum reaction process parameters are as follows: the usage of sodium hydroxide is 26.4 g/100 g acid leaching residue, the reaction temperature is 90℃, the reaction time is 1 h, and the ratio of the liquid/solid is 2.0. The significance sequence of the process parameters to the alkali leaching reaction effect is the usage of sodium hydroxide > the ratio of the liquid/solid > the reaction time > the reaction temperature. The significance sequence to the leaching ratio of SiO2 is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. The significance sequence to the modulus of the sodium silicate is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. Under the optimum conditions, the leaching ratio of the SiO2 is 77.5%, and the modulus of the sodium silicate is 3.15. The XRD analysis result indicates that the major components of the alkali leaching residue are serpentine, talc, quartz and some albite.

关键词： asbestos tailing acid leaching residue sodium hydroxide process optimization

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

Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution

引用

中国科学:技术科学 2010年第4期 462-462页

Silica is the major component of the acid leaching residue of asbestos *** waterglass solution can be prepared by the reaction of the residue with sodium hydroxide aqueous *** to the high temperature reaction method,this process is environmental friendly and low *** this paper,the reaction process of the residue and the sodium hydroxide aqueous solution is *** optimum reaction process parameters are as follows:the usage of sodium hydroxide is 26.4 g/100 g acid leaching residue,the reaction temperature is 90℃,the reaction time is 1 h,and the ratio of the liquid/solid is *** significance sequence of the process parameters to the alkali leaching reaction effect is the usage of sodium hydroxide>the ratio of the liquid/solid>the reaction time>the reaction *** significance sequence to the leaching ratio of SiO2 is the ratio of the liquid/solid>the usage of sodium hydroxide>the reaction time>the reaction *** significance sequence to the modulus of the sodium silicate is the ratio of the liquid/solid>the usage of sodium hydroxide>the reaction time>the reaction *** the optimum conditions,the leaching ratio of the SiO2 is 77.5%,and the modulus of the sodium silicate is *** XRD analysis result indicates that the major components of the alkali leaching residue are serpentine,talc,quartz and some albite.

关键词： asbestos tailing acid leaching residue sodium hydroxide process optimization

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

Harnessing eco-friendly additives to manipulate zinc-ion solvation structures towards stable zinc metal batteries

引用

Journal of Energy Chemistry 2024年第11期 114-122页

作者： Lingmei Wang hao Shen Wuzhu Sun Tianle zheng Hongwei Li Jicheng Yan Lemeng ding Zhongti Sun Jingyu Sun Chao Li school of materials science and Engineering Shandong University of Technology school of materials science and Engineering Jiangsu University Department of Chemistry College of Sciences Shanghai University College of Energy Soochow University

Considerable research efforts have been dedicated to investigating the side reactions and the growth of Zn dendritic in aqueous zinc-ion batteries（AZIBs）.The incorporation of organic solvents as additives in electrolytes has yielded highly promising ***,their pervasive use has been hindered by concerns regarding their toxicity,flammability,and economic ***,we propose the utilization of γ-valerolactone（γ-V）,a novel eco-friendly solvent,as an alternative for conventional organic additives to improve the performance of Zn *** investigations and theoretical analyses have verified that γ-V additives can diminish the Zn2+-desolvation energy and enhance Zn2+transport *** adsorbed γ-V molecules modulate the nucleation and diffusion of Zn2+,facilitating Zn growth along the（002） crystal plane,thus inhibiting dendrite formation and side ***,the modified electrolyte with 3% γ-V exhibit highly reversible cycling for 2800 h at1 mA cm-2and 1 mA h cm-2in Zn//Zn symmetric *** Zn//KVOH coin cells deliver a capacity retention of 74.7% after 1000 cycles at 5 A *** Zn//KVOH pouch cells maintain a capacity retention of78.7% over 90 cycles at 3 A ***,the γ-V additives also effectively alleviate the self-discharge *** work provides valuable insights on the development of aqueous zinc-ion batteries with superior safety through the modulation of electrolytes using eco-friendly additives.

关键词：

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

Zeolitic imidazolate framework-8 modified poly(vinylidene fluoride-cohexafluoropropylene)/polyacrylonitrile composite separators for Li-ion batteries

引用

Chinese Journal of Chemical Engineering 2023年第10期62卷 291-296页

作者： Yanhuai ding Cong Zhang hao zheng Yi Han Institute of Rheological Mechanics Xiangtan UniversityXiangtan 411105China school of Mechanical Engineering and Mechanics Xiangtan UniversityHunan 411105China

As one of the most stable metal-organtic framework(MOF),zeolitic imidazolate framework-8(ZIF-8)has been widely studied for applications in the field of energy storage,catalysis,and environment *** this paper,ZIF-8 was employed to enhance the electrochemical properties and thermal stability of the electrospun poly(vinylidene fluoride-co-hexafluoropropylene)/polyacrylonitrile(PVDF-HFP/PAN)composite *** results indicate that the test cells assembled with the composite separators show improved rate capability,high discharge capacity,and stable cycling *** addition of ZIF-8 can improve the affinity of PVDF-HFP/PAN toward liquid electrolytes,and further enhance the ionic conductivity of the composite *** addition,the thermal stability of the PVDF-HFP/PAN separator has been improved by ZIF-8 *** work can provide insight into the application of MOF materials in Li-ion batteries.

关键词： Nanotechnology ZIF-8 PVDF-HFP/PAN Composites Electrolytes

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

Wafer-scale 30°twisted bilayer graphene epitaxially grown on Cu_(0.75)Ni_(0.25)(111)

引用

Chinese Physics B 2024年第6期33卷 467-471页

作者：马鹏程张翱甄洪润江志诚杨逸尘丁建阳刘正太刘吉山沈大伟于庆凯刘丰张学富刘中灏 school of Physical science and technology Ningbo UniversityNingbo 315211China Institute of High-Pressure Physics Ningbo UniversityNingbo 315211China National Key Laboratory of materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of materials science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

Twisted bilayer graphene(TBG) has been extensively studied because of its novel physical properties and potential application in electronic *** we report the synthesis and characterization of 300 TBG naturally grown on Cu_(0.75)Ni_(0.25)(111) film and investigate the electronic structure by angle-resolved photoemission *** with other substrates,our TBG with a wafer scale is acquired with a shorter growth *** Fermi velocity and energy gap of Dirac cones of TBG are comparable with those of a monolayer on Cu_(0.85)Ni_(0.15)(111).The signature of moré lattices has not been observed in either the low-energy electron diffraction patterns or the Fermi surface map within experimental resolution,possibly due to different Cu and Ni contents in the substrates enhancing the different couplings between the substrate and the first/second layers and hindering the formation of a quasiperiodic structure.

关键词： twisted bilayer graphene electronic structure Cu/Ni(111)

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

Solution combustion synthesis of high-entropy metal spinel oxide as oxygen evolution reaction catalyst

引用

china Foundry 2022年第6期19卷 551-558页

作者： Tao Lu Yue Zhang Li ding hao-yue zheng Ye Pan school of materials science and Engineering Southeast UniversityJiangsu Key Laboratory of Advanced Metallic MaterialsNanjing 211189China

High-entropy metal spinel oxide(HEO)is proved to be a promising oxygen evolution reaction(OER)catalyst with high catalytic performance and stability.A short routine synthesis process based on solution combustion synthesis was proposed to prepare(Co_(0.25)Ni_(0.25)Mn_(0.25)Zn_(0.25))Fe_(2)O_(4)spinel HEO in this *** the process,the products were rapidly synthesized and melted due to the high-temperature reaction,and then quickly crystallized on the surface of nickel foam to form a nano-structure *** the aid of nano-scale spinel structure,the overpotential of non-activation HEO electrode reaches 276 mV at the current density of 10 mA·cm^(-2),and after 100 h i-t test,it can be further reduced to 230 mV,which proves the high activity of OER *** promotion of OER catalytic performance can be attributed to the surface reconstruction caused by the selective element leaching and the boost of oxygen vacancy,leading to the formation of nano-scale flocculation around spinel core after the long-term OER *** work indicates a special casting process for functional materials and explores the application of rapid crystallization.

关键词： high-entropy oxide spinel OER catalysis microstructure

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

Preparation of BiPO4/graphene photoelectrode and its photoelectrocatalyitic performance

引用

Chinese Journal of Catalysis 2020年第2期41卷 302-311页

作者： Zetian He Sen Liu Yi Zhong Daimei Chen hao ding Jiao Wang gaoxiang du Guang Yang Qiang hao beijing Key Laboratory of materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China beijing Polytechnic College Beijing 100042China Centre for technology in Water and Wastewater School of Civil and Environmental EngineeringUniversity of Technology SydneySydney 2007Australia

In this work, a two-step electrodeposition method was employed to prepare BiPO4 nanorod/reduced graphene oxide/FTO composite electrodes(BiPO4/r GO/FTO). The BiPO4/r GO/FTO composite electrode showed the higher photoelectrocatalytic(PEC) activity for the removal of methyl orange than pure BiPO4, which was 2.8 times higher than that of BiPO4/FTO electrode. The effects of working voltage and BiPO4 deposition time on the degradation efficiency of methyl orange were investigated. The optimum BiPO4 deposition time was 45 min and the optimum working voltage was 1.2 V. The trapping experiments showed that hydroxyl radicals(·OH) and superoxide radicals(·O2-) were the major reactive species in PEC degradation process. The BiPO4/r GO/FTO composite electrode showed the high stability and its methyl orange removal efficiency remained unchanged after four testing cycles. The reasons for the enhanced PEC efficiency of the BiPO4/r GO/FTO composite electrode was ascribed to the broad visible-light absorption range, the rapid transmission of photogenerated charges, and the mixed BiPO4 phase by the introduction of r GO in the composite electrode films.

关键词： Reduced graphene oxide BiPO4 Fluorine-doped tin oxide Electrodeposition Photoelectrocatalysis Methyl orange

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

Formability of TRIP/TWIP Steel Containing Manganese of 18.8%

引用

Journal of Iron and Steel Research International 2011年第1期18卷 36-40页

作者： ding hao ding Hua QIU Chun-lin TANG zheng you ZENG Jian min YANG Ping school of materials and Metallurgy Northeastern University Shenyang 110819 I.iaoning China State Key l.aboratory of Rolling and Automation of Northeastern university Shenyang 110819 I.iaoning China school of materials science and Engineering University of Science and Technology Beijing Beijing 100083 China

The mechanical property and forming limit experiments were carried out on a higli manganese TRIP/TWIP steels with manganese of 18.8%. And the forming /imit diagram was obtained. This hig：h manganese steel shows outstanding mechanical properties comhining high strength with good formability. Its limit plane strain corresponding to the lowest point in the plain strain condition is about 38%. The effects of conventional mechanical property on the limit plane strain were analyzed. With increasing the content of Mn, the limit plane strain increases, indicating that TWlP effect is advantageous to the increase of formability. Combining with three classical models and volume invaria ble principle, a FLD model was buih, which is suitable for high manganese steels very well.

关键词： high manganese TRIP/TWIP steel mechanical property formability forming limit diagram

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

Synergistic coupling of 0D-2D heterostructure from ZnO and Ti_(3)C_(2)T_(x)MXene-derived TiO_(2)for boosted NO_(2)detection at room temperature

引用

Nano materials science 2023年第4期5卷 421-428页

作者： Hong-Peng Li Jie Wen Shu-Mei ding Jia-Bao ding Zi-hao Song Chao Zhang Zhen Ge Xue Liu Rui-zheng Zhao Feng-Chao Li College of Mechanical Engineering Yangzhou UniversityYangzhou225127China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou313001China school of materials science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin300350China Laboratory of Advanced materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materialsand School of Chemistry and MaterialsFudan UniversityShanghai200433China Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes School of Mechanical and Electronic EngineeringSuzhou UniversitySuzhou234000China

2D MXenes are highly attractive for fabricating high-precision gas sensors operated at room temperature(RT)due to their high surface-to-volume ***,the limited selectivity and low sensitivity are still long-standing challenges for their further ***,the self-assembly of 0D-2D heterostructure for highly sensitive NO_(2) detection was achieved by integrating ZnO nanoparticles on Ti_(3)C_(2)Tx MXene-derived TiO_(2) nanosheets(designated as ZnO@MTiO_(2)).ZnO nanoparticles can not only act as spacers to prevent the restacking of MTiO_(2) nanosheets and ensure effective transfer for gas molecules,but also enhance the sensitivity of the sensor the through trapping effect on ***,MTiO_(2) nanosheets facilitate gas diffusion for rapid sensor *** from the synergistic effect of individual components,the ZnO@MTiO_(2)0D-2D heterostructure-based sensors revealed remarkable sensitivity and excellent selectivity to low concentration NO_(2) at *** work may facilitate the sensing application of MXene derivative and provide a new avenue for the development of high-performance gas sensors in safety assurance and environmental monitoring.

关键词： MXene derivative Heterostructure Gas sensors TiO_(2)ZnO

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

Hierarchical NiMoP_(2)-Ni_(2)P with amorphous interface as superior bifunctional electrocatalysts for overall water splitting

引用

Journal of materials science & technology 2021年第18期77卷 108-116页

作者： Gaoqi Tian Songrui Wei Zhangtao Guo Shiwei Wu Zhongli Chen Fuming Xu Yang Cao zheng Liu Jieqiong Wang Lei ding Jinchun Tu hao Zeng State Key Laboratory of Marine Resource Utilization in South china Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China College of Physics and Optoelectronic Engineering.Shenzhen university Shenzhen 518080China Qiongtai Normal university Haikou 571127China Department of Physics SUNY-BuffaloBuffaloNY14260USA

Producing highly efficient bifunctional catalyst for the generation of hydrogen and oxygen through overall water splitting is an emerging direction in ***,a dandelion-like hierarchical NiMoP_(2)-Ni_(2)P(nanowire/nanoparticle)heterostructure was synthesized for efficient electrochemical water *** NiMoP_(2)-Ni_(2)P heterostructures grown on carbon cloth as a freestanding integrated electrode exhibited excellent oxygen evolution reaction(OER)activity and hydrogen evolution reaction(HER)activities with low overpotentials(258 mV and 53 mV to reach 10 mA cm~(-2)for the OER and HER,respectively),and small Tafel slope(45 mV dec^(-1)and 58 mV dec^(-1)for the OER and HER,respectively).Moreover,the NiMoP_(2)-Ni_(2)P heterostructure can act as both anode and cathode catalysts for overall water splitting with low overall potential of 1.48 V at 10 mA cm~(-2).Density functional theory(DFT)combined with structural probes suggests that the amorphous heterogeneous interfaces play an essential role in enhanced catalytic performance.

关键词： Bimetallic phosphide Amorphous interface Adsorption energy Hydrogen evolution reaction Oxygen evolution reaction Water splitting

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：