期刊文献+
共找到13篇文章
< 1 >
每页显示 20 50 100
电化学检测方法在环境分析中的应用 被引量:1
1
作者 王珺 郭玉凤 +2 位作者 郭茹辉 姚子俭 胡素琨 《河北化工》 2006年第7期47-49,共3页
介绍了电化学和环境电化学的基础知识,着重论述了环境电化学的检测方法。
关键词 电化学 环境电化学 检测方法
下载PDF
研究型教学方式在双语教学中的实践探索——以《环境生物电化学》课程为例
2
作者 陈姗姗 《广东化工》 CAS 2018年第7期250-251,共2页
针对目前双语课程存在学生英语水平参差、主动性难以调动、重理论轻实践等问题,提出以研究型教学带动双语课堂的教学方法。以《环境生物电化学》双语课程为对象进行实践探索,通过构建合理的教学框架、进行课程中英文教材及教学资源建设... 针对目前双语课程存在学生英语水平参差、主动性难以调动、重理论轻实践等问题,提出以研究型教学带动双语课堂的教学方法。以《环境生物电化学》双语课程为对象进行实践探索,通过构建合理的教学框架、进行课程中英文教材及教学资源建设、理论传授与分组研究相结合,建立了一套较为完善的教学模式,根据学生评价对课程进行总结和改进,旨在提升授课质量,培养国际化及创新型的环境领域人才。 展开更多
关键词 研究型教学 双语教学 教学改革 环境生物电化学
下载PDF
多孔火山岩制备新型复合阳极材耦合微生物燃料电池电化学强化废水脱氮除磷
3
作者 张元浩 高常飞 +1 位作者 刘珂萌 王红波 《广东化工》 CAS 2022年第20期118-120,132,共4页
本研究在污泥生物炭中掺杂氮,经高温灼烧后利用PVDF附着在粗糙多孔的火山岩表面,实现对微生物燃料电池(MFC)中阳极材料的改性,并使用普通未有氮掺杂的活性炭作为对照组的阳极材料。制备的氮掺杂的阳极材料具有良好的生物附着性、较大的... 本研究在污泥生物炭中掺杂氮,经高温灼烧后利用PVDF附着在粗糙多孔的火山岩表面,实现对微生物燃料电池(MFC)中阳极材料的改性,并使用普通未有氮掺杂的活性炭作为对照组的阳极材料。制备的氮掺杂的阳极材料具有良好的生物附着性、较大的电化学反应活性面积。改性后的MFC在稳定运行一段时间后,其周期内最高输出电压达到0.666 V,最大输出功率密度达到0.13 W/m^(2)。氮掺杂污泥生物炭改性后的阳极材料辅助MFC开展模拟有机废水的处理,化学需氧量(COD)、氨氮(NH_(4)^(+)-N)、总磷(TP)的去除效率分别为87.1%、77.7%和93.5%。研究结果表明采用氮掺杂污泥生物炭的火山岩辅助MFC,不仅具有良好的产电性能,对有机废水中处理中也表现出优异的处理效果,该研究利用污泥和火山岩大大降低了阳极材料的制备成本,增加了微生物的附着面积,提高了MFC的产电性能,应用前景广阔。 展开更多
关键词 环境电化学 微生物燃料电池 火山岩 污泥 阳极材料改性 有机废水处理
下载PDF
环境电分析化学 被引量:10
4
作者 王胜天 许宏鼎 李景虹 《分析化学》 SCIE EI CAS CSCD 北大核心 2002年第8期1005-1011,共7页
介绍了环境电分析化学的基础、应用和发展 。
关键词 环境电分析化学 环境电化学 环境监测 环境污染物 电位法 电流法 溶出分析法
下载PDF
硫化矿浮选粗精矿再磨工艺对矿物表面性质的影响 被引量:9
5
作者 杨波 童雄 +2 位作者 谢贤 黄凌云 王晓 《矿物学报》 CAS CSCD 北大核心 2021年第3期294-300,共7页
随着矿产资源开发利用程度的逐年加剧,目前大部分有色金属选厂处理的都是品位低、嵌布粒度细的复杂多金属矿,为提高有价金属的选矿回收率、降低磨矿成本,大部分选厂都采用"阶段磨矿、阶段选别"工艺,其中以浮选粗精矿的再磨最... 随着矿产资源开发利用程度的逐年加剧,目前大部分有色金属选厂处理的都是品位低、嵌布粒度细的复杂多金属矿,为提高有价金属的选矿回收率、降低磨矿成本,大部分选厂都采用"阶段磨矿、阶段选别"工艺,其中以浮选粗精矿的再磨最为常见。硫化矿浮选粗精矿的再磨可显著提高磨矿效率及目的矿物解离度,但生产实践中大部分选厂仅关注目的矿物的解离度,而忽视了硫化矿浮选粗精矿再磨过程中磨矿介质、磨矿方式、矿浆电化学环境等多种因素对矿物表面性质及浮选行为的影响。文章系统总结了硫化矿浮选粗精矿矿物组成特点及矿浆化学性质的基础上,综述了硫化矿浮选粗精矿再磨过程中磨机类型及磨矿方式、磨矿介质材质及形状、矿浆电化学环境、药剂浓度等多种因素对再磨后矿物表面性质及浮选行为的影响规律,指出通过精矿再磨工艺参数及矿浆电化学环境的合理优化调整,增强矿物表面间的亲水/疏水性差异,提高精选分离效果应是未来硫化矿浮选粗精矿再磨研究关注的重要方向。 展开更多
关键词 混浮精矿 精矿再磨 磨矿介质 矿浆电化学环境
下载PDF
锂-硫二次电池界面反应的特殊性与对策分析 被引量:8
6
作者 艾新平 曹余良 杨汉西 《电化学》 CAS CSCD 北大核心 2012年第3期224-228,共5页
锂-硫电池是在现有锂离子电池基础上最可能实现储能密度大幅提升的实用二次电池体系.然而,这一电池体系的电化学利用率与循环稳定性仍然难以满足应用要求.造成锂-硫电池性能不稳定的原因在于硫正极和锂负极的材料结构和反应环境始终处... 锂-硫电池是在现有锂离子电池基础上最可能实现储能密度大幅提升的实用二次电池体系.然而,这一电池体系的电化学利用率与循环稳定性仍然难以满足应用要求.造成锂-硫电池性能不稳定的原因在于硫正极和锂负极的材料结构和反应环境始终处于变化之中,如在充放电过程中,硫/碳反应界面的电化学阻塞、中间产物的溶解流失、正负极之间的物质穿梭效应等副反应导致正极与负极均难以形成稳定的电化学反应界面.针对这些特殊问题,本文简要分析了影响能量利用率和循环稳定性的化学与电化学机制,并提出了构建稳定锂负极与高效硫正极的若干可行性技术. 展开更多
关键词 锂-硫二次电池 界面反应 电化学环境
下载PDF
Electrocatalytic H_(2)O_(2)generation for disinfection 被引量:5
7
作者 Yachao Zeng Gang Wu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第12期2149-2163,共15页
Epidemics are threatening public health and social development.Emerging as a green disinfectant,H_(2)O_(2)can prevent the breakout of epidemics in migration.Electrochemical H_(2)O_(2)production powered by renewable el... Epidemics are threatening public health and social development.Emerging as a green disinfectant,H_(2)O_(2)can prevent the breakout of epidemics in migration.Electrochemical H_(2)O_(2)production powered by renewable electricity provides a clean and decentralized solution for on-site disinfection.This review firstly discussed the efficacy of H_(2)O_(2)in disinfection.Then necessary fundamental principles are summarized to gain insight into electrochemical H_(2)O_(2)production.The focus is on exploring pathways to realize a highly efficient H_(2)O_(2)production.Progress in advanced electrocatalysts,typically single-atom catalysts for the two-electron oxygen reduction reaction(2e−ORR),are highlighted to provide high H_(2)O_(2)selectivity design strategies.Finally,a rational design of electrode and electrolytic cells is outlined to realize the on-site disinfection.Overall,this critical review contributes to exploiting the potentials and constraints of electrochemical H_(2)O_(2)generation in disinfection and pinpoints future research directions required for implementation. 展开更多
关键词 Hydrogen peroxide Oxygen reduction DISINFECTION ELECTROSYNTHESIS Single metal atom catalysts
下载PDF
Effect of galvanic contact on the flotability of galena in the presence and absence of a collector 被引量:2
8
作者 M.B.Eslami Andargoli S.Jannesar Malakooti +1 位作者 F.Doulati Ardejani H.Abdollahi 《International Journal of Mining Science and Technology》 SCIE EI 2012年第5期629-632,共4页
In this paper,the effect of various electrochemical environments in the galena flotation is investigated.The electrochemical environments consisted of a ball mill for grinding of galena ore and a Denver flotation cell... In this paper,the effect of various electrochemical environments in the galena flotation is investigated.The electrochemical environments consisted of a ball mill for grinding of galena ore and a Denver flotation cell for flotation of galena in the laboratory scale.In order to achieve the maximum recovery with sodium hyposulfite,the concentrations of 0.06 and 0.12 M of air and nitrogen gases have been used to control the pulp potential in the Denver flotation cell.The galena sample was from the ''Era mine'' which is located in the Kiyasar area,north of Iran.This mine contains:Galena(PbS) at least 22%,Fluorite(CaF 2) 73.37%,Quartz(SiO 2) 2.54% and other minerals such as Cerussite(PbCO 3) and Kaolinite(Al 2 Si 2 O 5(OH) 4).Flotation of Galena was conducted in a 0.12 M of sodium hyposulfite solution.It was found that the amount of recovery by this process was 85% and 63% in the presence and absence of potassium amyl xanthate(KAX) and at an estimated potential of 280 to 350 mV respectively while the recovery was 70% and 52% at an approximate potential of 175 to 210 mV in water in the presence and absence of collector(KAX). 展开更多
关键词 Flotation Collector Galena Electrochemical Galvanic interactions
下载PDF
矿用电子仪器的正确使用及维护 被引量:2
9
作者 李明 《煤炭经济研究》 2011年第6期98-99,共2页
文章介绍了矿用电子仪器的基本使用要求和注意事项,分析了几种影响仪器使用的因素。
关键词 仪器 腐蚀 电化学环境
原文传递
Off-design performance of a chemical looping combustion (CLC) combined cycle:effects of ambient temperature 被引量:2
10
作者 Jinling Chi Bo Wang +1 位作者 Shijie Zhang Yunhan Xiao 《Journal of Thermal Science》 SCIE EI CAS CSCD 2010年第1期87-96,共10页
The present work investigates the influence of ambient temperature on the steady-state off-design thermodynamic performance of a chemical looping combustion(CLC) combined cycle.A sensitivity analysis of the CLC reacto... The present work investigates the influence of ambient temperature on the steady-state off-design thermodynamic performance of a chemical looping combustion(CLC) combined cycle.A sensitivity analysis of the CLC reactor system was conducted,which shows that the parameters that influence the temperatures of the CLC reactors most are the flow rate and temperature of air entering the air reactor.For the ambient temperature variation,three off-design control strategies have been assumed and compared:1) without any Inlet Guide Vane(IGV) control,2) IGV control to maintain air reactor temperature and 3) IGV control to maintain constant fuel reactor temperature,aside from fuel flow rate adjusting.Results indicate that,compared with the conventional combined cycle,due to the requirement of pressure balance at outlet of the two CLC reactors,CLC combined cycle shows completely different off-design thermodynamic characteristics regardless of the control strategy adopted.For the first control strategy,temperatures of the two CLC reactors both rise obviously as ambient temperature increases.IGV control adopted by the second and the third strategy has the effect to maintain one of the two reactors' temperatures at design condition when ambient temperature is above design point.Compare with the second strategy,the third would induce more severe decrease of efficiency and output power of the CLC combined cycle. 展开更多
关键词 Chemical looping combustion Combined cycle Off-design performance Thermodynamic analysis Ambient temperature
原文传递
A novel low-cost and environment-friendly cathode with large channels and high structure stability for potassium-ion storage 被引量:3
11
作者 Weike Wang Bifa Ji +6 位作者 Wenjiao Yao Xinyuan Zhang Yongping Zheng Xiaolong Zhou Pinit Kidkhunthod Haiyan He Yongbing Tang 《Science China Materials》 SCIE EI CAS CSCD 2021年第5期1047-1057,共11页
Potassium-ion batteries (KIBs) are promising candidates for large-scale energy storage due to the abundance of potassium and its chemical similarity to lithium.Nevertheless,the performances of KIBs are still unsatisfa... Potassium-ion batteries (KIBs) are promising candidates for large-scale energy storage due to the abundance of potassium and its chemical similarity to lithium.Nevertheless,the performances of KIBs are still unsatisfactory for practical applications,mainly hindered by the lack of suitable cathode materials.Herein,combining the strong inductive effect of sulphate and the feasible preparation of Fe^(2+)-containing compounds in oxalate system,a compound with novel architecture,K_(4)Fe_(3)(C_(2)O_(4))_(3)(SO_(4))_(2),has been identified as a lowcost and environmentally friendly cathode for stable potassium-ion storage.Its unique crystal structure possesses an unprecedented two-dimensional framework of triple layers,with 3.379Åinterlayer distance and large intralayer rings in the size of 4.576×6.846Å.According to first-principles simulations,such a configuration is favorable for reversible K-ion migration with a very low volume change of 6.4%.Synchrotron X-ray absorption spectra and X-ray diffraction characterizations at different charging/discharging states and electrochemical performances based on its half and full cells further verify its excellent reversibility and structural stability.Although its performance needs to be improved via further composition tuning with multi-valent transition metals,doping,structural optimization,etc.,this study clearly presents a stable structural model for K-ion cathodes with merits of low cost and environmental friendliness. 展开更多
关键词 potassium-ion cathode Fe-based polyanionic compound low cost environment friendly
原文传递
Special Topic on Ionic Liquids: Energy, Materials & Environment 被引量:2
12
作者 Suojiang Zhang Buxing Han Jianji Wang 《Science China Chemistry》 SCIE EI CAS CSCD 2016年第5期505-506,共2页
Ionic liquids (ILs) are organic salts with low melting points, which have many unusual properties like negligible vapor pressure, good thermal stability, non-flammability, wide liquid range and electrochemical windo... Ionic liquids (ILs) are organic salts with low melting points, which have many unusual properties like negligible vapor pressure, good thermal stability, non-flammability, wide liquid range and electrochemical window, and excellent solvation power for both organic and inorganic substances. The unique characteristics of ILs endow them with great potential for applications in different fields including chem- ical reactions, extraction and separation, material science, renewable energy, environment, and photoelectric trans- formations. Their properties can be tuned to suit various applications by changing the structures of the cations and/or anions. 展开更多
关键词 CHEMISTRY Synthesis (chemical)
原文传递
Steric paper based ratio-type electrochemical biosensor with hollow-channel for sensitive detection of Zn2+
13
作者 Li Li Yan Zhang +3 位作者 Lina Zhang Shenguang Ge Mei Yan Jinghua Yu 《Science Bulletin》 SCIE EI CAS CSCD 2017年第16期1114-1121,共8页
The construction of flexible platform possessing the functions of immobilizing, separating, rinsing, and high-throughput analysis plays a significant role in biological and clinical research. Herein, hollow- channel t... The construction of flexible platform possessing the functions of immobilizing, separating, rinsing, and high-throughput analysis plays a significant role in biological and clinical research. Herein, hollow- channel technique was integrated with lab-on-paper for the simultaneous determination of two different concentrations of Zn2+ based on the origami principle, in which microfiuidic channels were first patterned on a cellulose paper using commercial solid-state wax printer. Hollow-channels were created by laser cutting method as the role of both injecting ending and reaction tank. After screen printing three elec- trodes system, the resulting planar paper sheets were then folded into steric structures and functional- ized by in-situ synthesized reduced graphene oxide. As a proof-of-concept, such lab-on-paper device was employed in the ratiometric electrochemical monitoring of zinc ion from the environment and HepG2 cells extract, by combining with co-catalysis of porous metal-organic frameworks and hemin/ G-quadruplex toward H202 in the linear range of 0.1-7,000 nmol/L. The results indicated that integrating hollow-channel with steric lab-on-paper offered a new methodological approach for the development of metal ions monitoring research. It is believed that it could be useful for various point-of-care related research fields, such as, on-site environmental monitoring, food safety, and disease diagnosis. 展开更多
关键词 Flexible platform Lab-on-paper device Ratiometric electrochemical monitoring Zinc ion
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部