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Fe3C-N-doped carbon modified separator for high performance lithium-sulfur batteries 被引量:7
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作者 Hongyu Pan Zhong Tan +6 位作者 Haihui Zhou Lanlan Jiang Zhongyuan Huang Qjaoxia Feng Qiang Zhou Shuai Ma Yafei Kuang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第12期101-108,共8页
A new Fe3C-N-doped reduced graphene oxide(Fe3C-N-rGO)prepared by a facile method is used as a separator for high performance lithium-sulfur(Li-S)batteries.The Fe3C-N-rGO is coated on the surface of commercial polyprop... A new Fe3C-N-doped reduced graphene oxide(Fe3C-N-rGO)prepared by a facile method is used as a separator for high performance lithium-sulfur(Li-S)batteries.The Fe3C-N-rGO is coated on the surface of commercial polypropylene separator(Celgard 2400)close to the sulfur cathode.The special nanotubes are in-situ catalyzed by Fe3C nanoparticles.They could entrap lithium polysulfides(Li PSs)to restrain the shuttle effect and reduce the loss of active material.The battery with the modified separator and sulfur cathode shows an excellent cycle performance.It has a high rate performance,580.5 mAh/g at the high current rate of 4 C relative to 1075 mAh/g at 0.1 C.It also has an initial discharge capacity of 774.8 m Ah/g measured at 0.5 C and remains 721.8 mAh/g after 100 cycles with a high capacity retention of 93.2%.The outstanding performances are notable in recently reports with modified separator. 展开更多
关键词 fe3C-N-doped reduced graphene oxide modified separator Sulfur cathode Cyclic and rate performance
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Vacancies and Antisites in B2 FeAl and DO_3 Fe_3Al with a Modified Analytic EAM Model 被引量:4
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作者 Xiaolin SHU, Wan gyu HU, Hanning XIAO and Huiqiu DENG College of Materials Science and Engineering, Hunan University, Changsha 410082, China Ban gwei ZHANG International Centre of Materials Physics, Chinese Academy of Sciences, S 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第6期601-604,共4页
A simple modified analytic EAM model for bcc Fe and fcc Al was used to calculate the lattice constant and elastic constants of B2 FeAl and DO3 Fe3Al alloys. The formation energies of ... A simple modified analytic EAM model for bcc Fe and fcc Al was used to calculate the lattice constant and elastic constants of B2 FeAl and DO3 Fe3Al alloys. The formation energies of vacancy and antisite were also calculated. The present calculations are in agreement with the experimental data and the theoretical results obtained by other authors. 展开更多
关键词 Al DO fe Vacancies and Antisites in B2 feAl and DO3 fe3Al with a modified Analytic EAM Model EAM
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Fe_3O_4 Magnetic Nanoparticles Modified Electrode as a Sensor for Determination of Nimesulide 被引量:1
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作者 ZHANG Jin-lei TAN Xue-cai +4 位作者 ZHAO Dan-dan TAN Sheng-wei LIU Li WANG Lin HUANG Zeng-wei 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2011年第4期566-569,共4页
A novel type of Fe3O4 nanoparticles modified glass carbon electrode(Fe3O4/GCE) was constructed and the electrochemical properties of N-(4-nitro-2-phenoxyphenyl)methanesulfonamide(nimesulide) were studied on the ... A novel type of Fe3O4 nanoparticles modified glass carbon electrode(Fe3O4/GCE) was constructed and the electrochemical properties of N-(4-nitro-2-phenoxyphenyl)methanesulfonamide(nimesulide) were studied on the Fe3O4/GCE.In 0.4mol/L HAc-NaAc buffer solution(pH=5.0),the electrode process of nimesulide was irreversible at bare GCE and Fe3O4/GCE.The Fe3O4/GCE exhibited a remarkable catalytic and enhancement effect on the reduction of nimesulide.The reduction peak potential of nimesulide shifted positively from-0.683 V at bare GCE to-0.625 V at Fe3O4/GCE,and the sensitivity was increased by ca.3 times.Some experimental conditions were optimized.The linear range between the peak current and the concentration of nimesulide was 2.6×10-6 "1.0×10-4mol/L(R=0.993) with a detection limit of 1.3×10-7mol/L.This method has been used to determine the content of nimesulide in medical tablets.The recovery was determined to be 96.9% "101.9% by means of standard addition method.The method is comparable to UV-Vis spectrometry. 展开更多
关键词 fe3O4 nanoparticle modified electrode NIMESULIDE DETERMINATION Electrochemical behavior
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Fe^(3+)改性羧甲基纤维素对腹腔粘连预防作用的研究 被引量:2
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作者 李有柱 刘国辉 +1 位作者 陈东 赵军 《临床外科杂志》 2004年第2期79-80,F003,共3页
目的 探讨Fe3 + 改性羧甲基纤维素对术后腹腔粘连的预防作用。方法 将 2 4只大鼠随机分为A、B、C 3组 ,先行均制作肠粘连模型 ,取A组为对照组 ,B组、C组于腹腔内损伤部位分别注入羧甲基纤维素钠及Fe3 + 改性羧甲基纤维素 ,术后 10d处... 目的 探讨Fe3 + 改性羧甲基纤维素对术后腹腔粘连的预防作用。方法 将 2 4只大鼠随机分为A、B、C 3组 ,先行均制作肠粘连模型 ,取A组为对照组 ,B组、C组于腹腔内损伤部位分别注入羧甲基纤维素钠及Fe3 + 改性羧甲基纤维素 ,术后 10d处死动物 ,观察各组腹腔粘连情况。结果 C组轻微粘连 ,A组广泛粘连 ,致密。 3组粘连分级差异有显著性意义 (P <0 .0 1) ,结论 Fe3 + 改性羧甲基纤维素明显减轻术后腹腔粘连程度 。 展开更多
关键词 fe^3+改性羧甲基纤维素 腹腔粘连 预防
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改进溶液燃烧法制备Fe3+掺杂Bi24O31Cl10及其光催化性能的研究
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作者 余萍 刘施羽 +1 位作者 王敏 付蕊 《材料工程》 EI CAS CSCD 北大核心 2020年第2期38-45,共8页
采用改进溶液燃烧法,以硝酸铋、柠檬酸、氯化铵和硝酸铁为原材料制备Fe-Bi24O31Cl10光催化物质,并通过在可见光下降解RhB评价Fe^3+掺杂对其光催化性能的影响。采用XRD,XPS,UV-vis,SEM,HTEM,FT-IR等表征手段研究了不同Fe^3+掺杂量对Bi24O... 采用改进溶液燃烧法,以硝酸铋、柠檬酸、氯化铵和硝酸铁为原材料制备Fe-Bi24O31Cl10光催化物质,并通过在可见光下降解RhB评价Fe^3+掺杂对其光催化性能的影响。采用XRD,XPS,UV-vis,SEM,HTEM,FT-IR等表征手段研究了不同Fe^3+掺杂量对Bi24O31Cl10的物相、元素价态、光吸收性能、微观形貌以及颗粒分布、晶面间距、化学结构组成等的影响。结果表明:掺杂Fe^3+未改变Bi24O31Cl10的物相,片状形貌,但其片状大小明显变小且厚度变薄,光吸收性能增强,光生电子-空穴复合率下降,与纯Bi24O31Cl10相比,Fe^3+掺杂能显著提高Bi24O31Cl10的光催化活性,当Fe^3+掺杂量为0.5%(摩尔分数)时,对Bi24O31Cl10的光催化性能促进最高,在可见光下光照50 min,对RhB的脱色率可达75%,较纯Bi24O31Cl10提高了44%。 展开更多
关键词 氯氧化铋 改进溶液燃烧法 fe^3+掺杂 RHB 光催化
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Electrocatalytic oxidation of hydrazine on magnetic bar carbon paste electrode modified with benzothiazole and iron oxide nanoparticles: Simultaneous determination of hydrazine and phenol 被引量:1
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作者 Ali Benvidi Shahriar Jahanbani +1 位作者 Bibi-Fatemeh Mirjalili Reza Zare 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第4期549-560,共12页
A magnetic bar carbon paste electrode (MBCPE) modified with Fe3O4 magnetic nanoparticles (Fe3O4NPs) and 2‐(3,4‐dihydroxyphenyl) benzothiazole (DPB) for the electrochemical determina‐tion of hydrazine was de... A magnetic bar carbon paste electrode (MBCPE) modified with Fe3O4 magnetic nanoparticles (Fe3O4NPs) and 2‐(3,4‐dihydroxyphenyl) benzothiazole (DPB) for the electrochemical determina‐tion of hydrazine was developed. The DPB was firstly self‐assembled on the Fe3O4NPs, and the re‐sulting Fe3O4NPs/DPB composite was then absorbed on the designed MBCPE. The MBCPE was used to attract the magnetic nanoparticles to the electrode surface. Owing to its high conductivity and large effective surface area, the novel electrode had a very large current response for the electrocat‐alytic oxidation of hydrazine. The modified electrode was characterized by voltammetry, scanning electron microscopy, electrochemical impedance spectroscopy, infrared spectroscopy, and UV‐visible spectroscopy. Voltammetric methods were used to study the electrochemical behaviour of hydrazine on MBCPE/Fe3O4NPs/DPB in phosphate buffer solution (pH = 7.0). The MBCPE/Fe3O4NPs/DPB, acting as an electrochemical sensor, exhibited very high electrocatalytic activity for the oxidation of hydrazine. The presence of DPB was found to reduce the oxidation potential of hydrazine and increase the catalytic current. The dependence of the electrocatalytic current on the hydrazine concentration exhibited two linear ranges, 0.1–0.4 μmol/L and 0.7–12.0 μmol/L, with a detection limit of 18.0 nmol/L. Additionally, the simultaneous determination of hydrazine and phe‐nol was investigated using the MBCPE/Fe3O4NPs/DPB electrode. Voltammetric experiments showed a linear range of 100–470 μmol/L and a detection limit of 24.3 μmol/L for phenol, and the proposed electrode was applied to the determination of hydrazine and phenol in water samples. 展开更多
关键词 modified electrode Electerocatalytic oxidation HYDRAZINE PHENOL Magnetic bar modified carbon paste electrode fe3O4 nanoparticle
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掺Fe3+改性A-TiO2的合成及其对曙红的可见光催化降解性能 被引量:4
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作者 张一兵 熊超鹏 《合成化学》 CAS 北大核心 2019年第5期373-378,共6页
采用水热法合成了系列含不同掺Fe^3+量的改性TiO2 粉末( 1^x , x=0、 2、 4、 5、 6、 8,掺铁量分别为0、 2 mol%、 4 mol%、 5 mol%、 6 mol%和8 mol%),其结构和形貌经XRD和SEM表征。并研究可见光照下 1x 对曙红降解的催化效果,考察了... 采用水热法合成了系列含不同掺Fe^3+量的改性TiO2 粉末( 1^x , x=0、 2、 4、 5、 6、 8,掺铁量分别为0、 2 mol%、 4 mol%、 5 mol%、 6 mol%和8 mol%),其结构和形貌经XRD和SEM表征。并研究可见光照下 1x 对曙红降解的催化效果,考察了不同因素的影响和光催化剂对曙红的暗吸附性能。结果表明: 1 x 的晶体为单一锐钛矿型(A-TiO2 ),由直径2~3 μm的 1x 微米球堆积而成;在15 mg·L^-1 曙红溶液(pH=4)中, 15 投放量为7 g·L^-1 ,于室温(18 ℃)可见光(功率40 W的白炽灯)照射反应3 h,曙红降解率 D 最大(63.1%),在该光催化优化条件下进行暗吸附,1.5 h达到吸附平衡, 1 5 对曙红吸附量为1.01 mg·g^-1 。 展开更多
关键词 曙红 fe^3+改性A-TiO2 制备 光催化 降解 暗吸附
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Nafion修饰微铂电极示差脉冲微分溶出状安法测定Fe^(3+)的研究 被引量:2
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作者 陈铁 崔胜云 +2 位作者 王桂芬 尹起范 朴承允 《延边大学学报(自然科学版)》 CAS 1994年第1期30-33,共4页
本文以20um铂业为基体,制备了Nafion修饰微铂电极,研究了Fe3+在该电极上的溶出伏安特性,并应用于血清中的Fe3+的测定,方法的最低检测限为5×10-9mol/L,在5×10-8~1.2×10-6... 本文以20um铂业为基体,制备了Nafion修饰微铂电极,研究了Fe3+在该电极上的溶出伏安特性,并应用于血清中的Fe3+的测定,方法的最低检测限为5×10-9mol/L,在5×10-8~1.2×10-6mol/L浓度范围内,Fe3+的浓度与峰高呈良好的线性关系,平行七次测定的相对标准偏差为2.92%,方法的回收率为102%. 展开更多
关键词 微电极 电化学分析 铁离子
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Fe3O4 Modified Up-Conversion Luminescent Nanocrystals for Biological Applications 被引量:2
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作者 Hou Yu Yin Zifei +2 位作者 Xin Hailiang Su Yonghua Yang Huagui 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2012年第12期2774-2778,共5页
Magnetic-luminescent nanocomposites have obtained a great deal of attention due to their potential applications in magnetic separation of cells, magnetic resonance imaging and luminescence imaging, and so on. Herein, ... Magnetic-luminescent nanocomposites have obtained a great deal of attention due to their potential applications in magnetic separation of cells, magnetic resonance imaging and luminescence imaging, and so on. Herein, a new and facile two-step synthetic strategy was developed to prepare magnetic Fe304 modified single crystalline up- conversion luminescent NaYF4: Yb3+, Er3+ nanocrystals using Fe304 nanoparticles as the seeds. Acting as the "nu- clei" in the reaction, the presence of Fe304 nanoparticles facilitates the formation of up-conversion NaYF4: Yb3+, Er3+ nanocrystals on their surfaces through heterogeneous nucleation process. The structure and properties of these multifunctional nanocrystals were characterized by transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), photo luminescence (PL) and X-ray diffraction (XRD). The results revealed that the as-prepared multifunctional nanocrystals show dual distinct properties of up-conversion fluorescent and superpara- magnetism, which were cubic in shape and very uniform in size with an average size ranging 30m40 nm. These unique functionalities could be very attractive for biological systems, and some biological applications such as cell- labelling were also demonstrated. 展开更多
关键词 up-conversion luminescent fe3O4 modified heterogeneous nucleation biological application
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Studies on a New Material for Hydrogen Storage and Supply by Modified Fe and Fe2O3 Powder
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作者 王惠 王宪生 +3 位作者 王新智 王小芳 董发昕 史启祯 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2007年第7期883-887,共5页
Modified iron oxide, a new material for hydrogen storage and supply to polymer electrolyte fuel cell (PEFC), was prepared by impregnating Fe or Fe2O3 powder with an aqueous solution containing metal cation additives... Modified iron oxide, a new material for hydrogen storage and supply to polymer electrolyte fuel cell (PEFC), was prepared by impregnating Fe or Fe2O3 powder with an aqueous solution containing metal cation additives (Al, Cr, Ni, Co, Zr and Mo). Hydrogen storage properties of the samples were investigated. The results show that both Fe and Fe2O3 powder with additive Mo presented excellent catalytic activity and cyclic stability, and their hydrogen producing temperature could be surprisingly decreased. The temperature of forming hydrogen for the Fe2O3-Mo at the rate of 250 μmol·min^-1·Fe-g^-1 could be dramatically decreased from 527 ℃ before addition of Mo to 283 ℃ after addition of Mo in the fourth cycle. The cause for it was probably related to preventing the sinter of the sample particles. In addition, hydrogen storage capacity of the Fe2O3-Mo can reach w=4.5% (72 kg H2/m^3), close to International Energy Agency (IEA) criterion. These show the value of practical application of the Fe2O3-Mo as the promising hydrogen storage material. 展开更多
关键词 modified fe and fe2O3 powder material for hydrogen storage metal additive performance of hydrogen storage catalytic activity and cyclic stability
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Fe-Al改性硅藻土与CaO配施改良Cd污染土壤
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作者 慈凯东 朱健 +7 位作者 杨雨中 孙梓菱 王平 刘子璇 麻淳雅 张楠 姚璐 孙雨 《中国环境科学》 EI CAS CSCD 北大核心 2019年第9期3905-3913,共9页
以人工模拟Cd污染土壤为研究对象,以Fe-Al改性硅藻土和CaO为原料制备组配改良剂,通过土壤培养试验研究了Fe-Al改性硅藻土与CaO不同配比对组配改良剂改良Cd污染土壤效果的影响.结果表明,向Cd污染土壤施加Fe-Al改性硅藻土与CaO以不同配比... 以人工模拟Cd污染土壤为研究对象,以Fe-Al改性硅藻土和CaO为原料制备组配改良剂,通过土壤培养试验研究了Fe-Al改性硅藻土与CaO不同配比对组配改良剂改良Cd污染土壤效果的影响.结果表明,向Cd污染土壤施加Fe-Al改性硅藻土与CaO以不同配比所制得组配改良剂对土壤Cd形态、pH值、CEC值、OM值、含水率、有效氮、速效磷、有效钾均产生了积极的影响.当Fe-Al改性硅藻土与CaO的配比为1:6时,土壤可交换态Cd含量较空白对照降低了74.67%,较单一施加Fe-Al改性硅藻土和CaO分别降低了64.63%和7.87%,与对照相比,土壤pH值提升了0.45,土壤CEC提升了69.78%,土壤有效氮、速效磷分别提升了28.57%、70.85%.Fe-Al改性硅藻土与CaO配施能有效控制土壤Cd污染,同时还可有效改善土壤耕作性能. 展开更多
关键词 fe-Al改性硅藻土 CAO 土壤CD污染 固定化 土壤养分
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纳米氧化铁修饰玻碳电极上亚硝酸根的电化学测定
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作者 周莹 黄广君 +1 位作者 卢晓童 张鹏 《山东化工》 CAS 2023年第6期105-107,共3页
在室温下将磁性纳米氧化铁粒子(γ-Fe_(2)O_(3))修饰于玻碳电极表面,制得了测定亚硝酸根(NO_(2)^(-))的电化学传感器(γ-Fe_(2)O_(3)/GCE)。在pH值4.8的0.2 mol·L^(-1)HAc-NaAc缓冲溶液中,修饰电极对NO_(2)^(-)具有催化和增敏明显... 在室温下将磁性纳米氧化铁粒子(γ-Fe_(2)O_(3))修饰于玻碳电极表面,制得了测定亚硝酸根(NO_(2)^(-))的电化学传感器(γ-Fe_(2)O_(3)/GCE)。在pH值4.8的0.2 mol·L^(-1)HAc-NaAc缓冲溶液中,修饰电极对NO_(2)^(-)具有催化和增敏明显增强。峰电位由1.06 V(裸电极)负移到0.96 V(修饰电极),灵敏度增加1.5倍。峰电流I与CNO_(2)^(-)在一定范围内呈现线性关系,浓度范围为6.0×10^(-6)~1.0×10^(-2)mol·L^(-1),对应检测限为4.0×10^(-6)mol·L^(-1)。研究NO_(2)^(-)在该修饰电极上的电化学机理,方法用于样品中亚硝酸根的测定,回收率在101.0%~104.8%。 展开更多
关键词 亚硝酸根 纳米氧化铁 修饰电极 电化学机理
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Removal of methyl orange from aqueous solution by Azolla filicoloides:Synthesis of Fe_3O_4 nano-particles and its surface modification by the extracted pectin of Azolla 被引量:3
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作者 Roohan Rakhshaee Masoud Giahi Afshin Pourahmad 《Chinese Chemical Letters》 SCIE CAS CSCD 2011年第4期501-504,共4页
The modified Fe3O4 nanoparticles with the extracted pectin from the cell wall of Azolla filicoloides(FNEP) can remove methyl orange as a watersoluble azo dye from waste water better than Azolla and the extracted pec... The modified Fe3O4 nanoparticles with the extracted pectin from the cell wall of Azolla filicoloides(FNEP) can remove methyl orange as a watersoluble azo dye from waste water better than Azolla and the extracted pectin from Azolla(EPA),alone.It could be due to more crowding the main functional groups of uptake after binding pectin with nanoparticles.Thermodynamic studies showed that adsorption equilibrium constant(KL) and maximum adsorption capacities(Q(max)) were increased with decreasing temperature(exothermic).The maximum uptake capacity(Q(max)) of dye by FNEP in a batch reactor was 0.533,0.498 and 0.446 mmol/g at 5,25 and 50℃,respectively.The enthalpy change(△H) and entropy change(△S) were 15.31 kJ/mol and 0.02434 kJ/mol K,respectively. 展开更多
关键词 Methyl orange uptake modified fe3O4 nano-particles Extracted pectin AZOLLA
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Towards High-performance Lithium-Sulfur Batteries: the Modification of Polypropylene Separator by 3D Porous Carbon Structure Embedded with Fe3C/Fe Nanoparticles 被引量:1
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作者 LIU Yusi ZHAO Xinghe +3 位作者 LI Sesi ZHANG Qiang WANG Kaixue CHEN Jiesheng 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2022年第1期147-154,共8页
Lithium-sulfur(Li-S)batteries with high energy densities have received increasing attention.However,the electrochemical performance of Li-S batteries is still far from the satisfactory of the practical application,whi... Lithium-sulfur(Li-S)batteries with high energy densities have received increasing attention.However,the electrochemical performance of Li-S batteries is still far from the satisfactory of the practical application,which can be mainly attributed to the shuttling of polysulfides and the slow reaction kinetics of polysulfide conversion.To address this issue,a 3D porous carbon structure constructed by 2D N-doped graphene and 1D carbon nanotubes with embedded Fe3C/Fe nanoparticles(NG@Fe3C/Fe)was designed and prepared by a simple programmed calcination method for the modification of polypropylene(PP)separator.The Fe3C/Fe nanoparticles demonstrate an excellent catalytic conversion and strong chemisorption towards polysulfides,while the unique architecture of N-doped graphene promotes the Li+/electron transfer and the physical adsorption of polysulfides.The electrochemical performance of the Li-S batteries with the NG@Fe3C/Fe-modified separator is significantly improved.A large discharge capacity of 1481 mA∙h∙g-1 is achieved at 0.2 C(1 C=1675 mA/g),and a high capacity of 601 mA∙h∙g-1 is maintained after discharged/charged for 500 cycles at a current rate of 1 C.This work provides a new approach for the development of high-performance Li-S batteries through the modification of the PP separator by rationally designed composites with large adsorption capability to polysulfides,good wettability to the electrolyte and high catalytic property. 展开更多
关键词 fe/fe3C nanoparticle modified separator Electro-catalytic effect Shuttle effect Lithium-sulfur battery
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A review of Fe_3O_4 thin films:Synthesis,modification and applications 被引量:1
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作者 Xiaoyi Wang Yulong Liao +2 位作者 Dainan Zhang Tianlong Wen Zhiyong Zhong 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第8期1259-1272,共14页
Magnetite (Fe3O4) has been used for thousands of years as one of the important magnetic materials. The rapid developments of thin film technology in the past few decades attract the attention of material scientists ... Magnetite (Fe3O4) has been used for thousands of years as one of the important magnetic materials. The rapid developments of thin film technology in the past few decades attract the attention of material scientists on the fabrication of magnetite thin films. In this article, we present an overview of recent progress on Fe3O4 thin films. The widely used preparation methods are surveyed, and the effect of sub- strates is discussed. Specifically the modified Fe3O4 thin films exhibit excellent electrical and magnetic properties compared with the pure films. It is noteworthy that modified Fe3O4 thin films can be put into two categories: (1) doped films, where foreign metal ions substitute iron ions at A or B sites: and (2) hybrid films, where magnetite phases are mixed with other materials. Notably, Fe3O4 thin films show great potentials in many applications such as sensors and batteries. It is expected that the investigations of Fe3O4 thin films will give us some breakthroughs in materials science and technology. 展开更多
关键词 fe3O4 Thin film Preparation method modified film Material science
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二氧化钛和三氧化二铁复合纳米晶电极的光电化学性质 被引量:43
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作者 王艳芹 程虎民 马季铭 《物理化学学报》 SCIE CAS CSCD 北大核心 1999年第3期222-227,共6页
研究了以不同方式相互修饰的Fe2 O3和TiO2 纳米晶电极的光电化学行为 (包括离子的相互掺杂 ) .在不同的入射光波长下 ,瞬态光电流谱显示Ti4+掺杂的Fe2 O3电极呈现n型半导体的特性(阳极光电流 ) ;以不同方式经Fe2 O3包覆的TiO2 电极由于... 研究了以不同方式相互修饰的Fe2 O3和TiO2 纳米晶电极的光电化学行为 (包括离子的相互掺杂 ) .在不同的入射光波长下 ,瞬态光电流谱显示Ti4+掺杂的Fe2 O3电极呈现n型半导体的特性(阳极光电流 ) ;以不同方式经Fe2 O3包覆的TiO2 电极由于能级的不匹配 ,在整个的波长测量范围内没有光响应 ;而对Fe3+离子掺杂的TiO2 电极和经TiO2 修饰 (包覆或偶联 )的Fe2 O3纳米晶电极则呈现出p n共存特性 ,甚至个别的电极表现出纯粹的p型半导体的特性 .这些现象可以从p型微区的形成得到解释 . 展开更多
关键词 纳米晶 太阳能电池 电极 二氧化钛 三氧化二铁
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超声波辅助NaCl-MnO_2改性沸石及其吸附性能 被引量:4
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作者 栗印环 张秀兰 +2 位作者 胡红艳 张至杰 常雪萍 《矿产综合利用》 CAS 2013年第4期44-47,共4页
在超声波辅助下,利用NaCl-MnO2对天然沸石进行改性,通过扫描电镜(SEM)表征沸石的微观特征,研究改性沸石对水中Fe3+的吸附性能及影响因素,结果表明:改性沸石表面负载了一层均匀的二氧化锰涂层,其吸附能力增强;在溶液pH=5及常温下,吸附时... 在超声波辅助下,利用NaCl-MnO2对天然沸石进行改性,通过扫描电镜(SEM)表征沸石的微观特征,研究改性沸石对水中Fe3+的吸附性能及影响因素,结果表明:改性沸石表面负载了一层均匀的二氧化锰涂层,其吸附能力增强;在溶液pH=5及常温下,吸附时间80min,改性沸石用量为4g/L时,对质量浓度为100mg/L的Fe3+的去除率为98.1%。 展开更多
关键词 超声波辅助 NaCl-MnO2 改性沸石 吸附 fe3+
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甘氨酸修饰玻碳电极的离子通道行为
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作者 刘焕新 邵会波 李玉红 《首都师范大学学报(自然科学版)》 2006年第4期44-47,共4页
用电化学氧化技术将甘氨酸修饰在玻碳电极表面形成稳定的单分子膜.改变含离子探针Fe(CN)63-的电解质溶液的pH,或向溶液中加入不同浓度的Ca2+,通过膜电极上Fe(CN)63-的电子传递,对膜的离子通道行为进行了研究.实验表明,在pH较低或有Ca2+... 用电化学氧化技术将甘氨酸修饰在玻碳电极表面形成稳定的单分子膜.改变含离子探针Fe(CN)63-的电解质溶液的pH,或向溶液中加入不同浓度的Ca2+,通过膜电极上Fe(CN)63-的电子传递,对膜的离子通道行为进行了研究.实验表明,在pH较低或有Ca2+存在的条件下,离子通道开启;pH较高或无Ca2+存在的条件下,离子通道关闭.推测了膜电极离子通道的形成机理. 展开更多
关键词 甘氨酸修饰电极 循环伏安 离子通道 fe(CN)6^3-
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聚L-苯丙氨酸/铁氰根修饰电极的制备及其对Vc的测定
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作者 贾晶晶 贾艳辉 《化学传感器》 CAS 2009年第1期62-65,共4页
制备了聚L-苯丙氨酸/铁氰根修饰电极,研究了Vc在该修饰电极上的电化学行为,建立了一种测定Vc的新方法。该方法简便准确,检测下限可达2.4×10-7mol/L,在4.0×10-7~2.0×10-2mol/L的浓度范围内,峰电流与Vc的浓度呈良好的线... 制备了聚L-苯丙氨酸/铁氰根修饰电极,研究了Vc在该修饰电极上的电化学行为,建立了一种测定Vc的新方法。该方法简便准确,检测下限可达2.4×10-7mol/L,在4.0×10-7~2.0×10-2mol/L的浓度范围内,峰电流与Vc的浓度呈良好的线性关系。该电极用于测定Vc片中Vc的含量,结果令人满意。 展开更多
关键词 L-苯丙氨酸 fe(CN)6^3- 修饰电极 VC
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谷氨酸修饰玻碳电极的制备及性质研究 被引量:1
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作者 陈静 黄燕生 邵会波 《邯郸学院学报》 2006年第3期54-57,共4页
研究了谷氨酸在玻碳电极表面上电化学聚合的条件及修饰电极的电化学特性,发现在0.0V-1.9V范围内,以10mV的扫描速度循环扫描10圈制备Glu/GCE电极效果最好,并且Glu/GCE电极在强酸性环境中对Fe(CN)63-探针离子的阻滞行为较弱.
关键词 谷氨酸修饰电极 循环伏安 fe(CN)6^2 阻滞行为
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