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Growth of Carbon Nanocoils by Porous α-Fe2O3/SnO2 Catalyst and Its Buckypaper for High Efficient Adsorption 认领 引用 被引量：4
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作者 Yongpeng Zhao Jianzhen Wang +7 位作者 Hui Huang Tianze Cong Shuaitao Yang Huan Chen Jiaqi Qin Muhammad Usman Zeng Fan Lujun Pan 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第2期137-153,共17页
High-purity(99%)carbon nanocoils(CNCs)have been synthesized by using porousα-Fe2O3/SnO2 catalyst.The yield of CNCs reaches 9,098%after a 6 h growth.This value is much higher than the previously reported data,indicati... High-purity(99%)carbon nanocoils(CNCs)have been synthesized by using porousα-Fe2O3/SnO2 catalyst.The yield of CNCs reaches 9,098%after a 6 h growth.This value is much higher than the previously reported data,indicating that this method is promising to synthesize high-purity CNCs on a large scale.It is considered that an appropriate proportion of Fe and Sn,proper particle size distribution,and a loose-porous aggregate structure of the catalyst are the key points to the high-purity growth of CNCs.Benefiting from the high-purity preparation,a CNC Buckypaper was successfully prepared and the electrical,mechanical,and electrochemical properties were investigated comprehensively.Furthermore,as one of the practical applications,the CNC Buckypaper was successfully utilized as an efficient adsorbent for the removal of methylene blue dye from wastewater with an adsorption efficiency of 90.9%.This study provides a facile and economical route for preparing high-purity CNCs,which is suitable for large-quantity production.Furthermore,the fabrication of macroscopic CNC Buckypaper provides promising alternative of adsorbent or other practical applications. 展开更多
关键词 Carbon nanocoils Porousα-Fe2O3/SnO2 Catalyst Buckypaper Methylene blue adsorption
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rGO量对SnO_2-Fe_2O_3/rGO锂离子电池负极材料性能的影响 认领 引用 被引量：3
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作者 何声太 高海 吴垚震 《天津工业大学学报》 CAS 北大核心 2018年第2期67-71,共5页
为改善SnO_2-Fe_2O_3的电化学性能,通过一步水热法合成SnO_2-Fe_2O_3GO纳米复合材料,采用XRD、SEM、电化学工作站和蓝电电池测试系统,研究rGO加入量对SnO_2-Fe_2O_3GO复合材料的结构和电化学性能的影响.结果表明:rGO的掺入能很好地提高S... 为改善SnO_2-Fe_2O_3的电化学性能,通过一步水热法合成SnO_2-Fe_2O_3GO纳米复合材料,采用XRD、SEM、电化学工作站和蓝电电池测试系统,研究rGO加入量对SnO_2-Fe_2O_3GO复合材料的结构和电化学性能的影响.结果表明:rGO的掺入能很好地提高SnO_2-Fe_2O_3循环稳定性和倍率性能;对于SnO_2-Fe_2O_3GO50复合材料,在160 m A/g的电流密度下,100次循环后,放电比容量仍然保持596.9 m Ah/g,库仑效率为98%;即使在1 A/g的电流密度下,依然有366.6 m Ah/g的平均放电比容量. 展开更多
关键词 锂离子电池 SnO2 Fe2O3 rGO 负极材料
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γ-Fe2O3纳米粒表面油酸的测定及对T1造影的影响 认领 引用
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作者 杨政 邓朗 +2 位作者 张彦 熊迎新 陈华黎 《医学诊断》 2025年第1期67-76,共10页
目的:检测γ-Fe2O3纳米粒表面油酸的残留量,考察油酸残留量对纳米粒磁共振T1造影效果的影响。方法:采用热分解法制备γ-Fe2O3纳米粒,使用mPEG-P取代γ-Fe2O3纳米粒表面的油酸,得到水溶性的γ-Fe2O3-PEG纳米粒,采用高效液相色谱法测定纳... 目的:检测γ-Fe2O3纳米粒表面油酸的残留量,考察油酸残留量对纳米粒磁共振T1造影效果的影响。方法:采用热分解法制备γ-Fe2O3纳米粒,使用mPEG-P取代γ-Fe2O3纳米粒表面的油酸,得到水溶性的γ-Fe2O3-PEG纳米粒,采用高效液相色谱法测定纳米粒表面残留的油酸,并在7T磁共振成像仪下考察油酸残留量与纳米粒T1造影效果的关联。最后,对体外造影效果最优的样品进行了体内磁共振成像测试。结果:建立了油酸的高效液相色谱检测方法,油酸在10~400 μg/mL浓度范围内具有良好的线性关系(r2 = 1),平均回收率为99.86%。通过改变γ-Fe2O3与mPEG-P的投料比,得到γ-Fe2O3-PEG纳米粒表面油酸残留个数分别为100、83、56、33的样品。体外磁共振成像结果表明,油酸残留量较少的纳米粒拥有更好的T1加权成像性能。小鼠体内血管造影显示,本研究制备的γ-Fe2O3-PEG纳米粒与临床使用的钆类造影剂相比,拥有更好的血管成像效果。结论:本研究成果为热分解法制备的氧化铁纳米粒表面油酸的定量分析提供了一种有效的检测方法,以促进该类纳米粒在生物医学领域的应用。Objective: Detection of residual oleic acid on the surface of γ-Fe2O3 nanoparticles and investigation of its impact on magnetic resonance T1 imaging. Method: We prepared γ-Fe2O3 nanoparticles via thermal decomposition, with mPEG-P replacing the oleic acid on the surface of the nanoparticles to yield water-soluble γ-Fe2O3-PEG nanoparticles. The residual oleic acid on the surface of the nanoparticles was quantified using High-Performance Liquid Chromatography, and the relationship between the amount of residual oleic acid and the T1 contrast effect of the nanoparticles was investigated using a 7T magnetic resonance imaging system. Finally, the vivo magnetic resonance imaging of the sample exhibiting the optimal in vitro contrast effect was conducted. Results: We developed a High-Performance Liquid Chromatography method for the detection of oleic acid, demonstrating a strong linear correlation in the concentration range of 10~400 μg/mL (r² = 1) with an average recovery rate of 99.86%. By varying the ratio of γ-Fe2O3 to mPEG-P, samples with oleic acid on the surface of γ-Fe2O3-PEG nanoparticles were obtained, with respective counts of 100, 83, 56, and 33. In vitro magnetic resonance imaging demonstrated that nanoparticles with lower residual oleic acid exhibited enhanced T1-weighted imaging performance. In vivo vascular imaging in mice demonstrated that the γ-Fe2O3-PEG nanoparticles prepared in this study provided better imaging results compared to commercially available gadolinium-based contrast agents. Conclusions: This study presents an effective detection method for the quantitative analysis of oleic acid on the surface of iron oxide nanoparticles synthesized via a thermolytic approach, thereby facilitating the application of such nanoparticles in the biomedical field. 展开更多
关键词 γ-Fe2O3 油酸 高效液相色谱法 磁共振成像
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水热法制备SnO_2/α-Fe_2O_3纳米复合材料 认领 引用 被引量：3
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作者 王卫伟 《化学研究与应用》 CAS 北大核心 2007年第9期975-978,共4页
用α-Fe2O3纳米粒子作为前驱物,以SnC l4和NaOH作为反应试剂,通过简单的水热法制备了SnO2/α-Fe2O3纳米复合材料。SnO2/α-Fe2O3纳米复合材料具有有趣的形貌:直径约为20nm的SnO2纳米棒以α-Fe2O3纳米粒子为中心向四周辐射生长。利用X-ra... 用α-Fe2O3纳米粒子作为前驱物,以SnC l4和NaOH作为反应试剂,通过简单的水热法制备了SnO2/α-Fe2O3纳米复合材料。SnO2/α-Fe2O3纳米复合材料具有有趣的形貌:直径约为20nm的SnO2纳米棒以α-Fe2O3纳米粒子为中心向四周辐射生长。利用X-ray粉末衍射(XRD),透射电镜(TEM)和扫描电镜(SEM)等测试手段对样品的成份、结构、形貌和尺寸进行了表征,初步探讨了SnO2/α-Fe2O3纳米复合材料的形成机理。 展开更多
关键词 纳米复合材料 氧化锡(SnO2) 三氧化二铁(Fe2O3) 水热反应
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Preparation,characterization and catalytic behavior of hierachically porous CuO/α-Fe_2O3/SiO2composite material for CO and o-DCB oxidation 认领 引用
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作者 Xiaodong Ma Xi Feng +2 位作者 Xuan He Hongwen Guo Lu Lu 《Journal of Natural Gas Chemistry》 CSCD 2011年第6期618-622,共5页
Hierachically porous(HP)CuO/α-Fe2O3/SiO2 composite material was fabricated by sol-gel method and multi-hydrothermal processes using HP-SiO2 as support.The resulting material was characterized by N2 adsorption-desorpt... Hierachically porous(HP)CuO/α-Fe2O3/SiO2 composite material was fabricated by sol-gel method and multi-hydrothermal processes using HP-SiO2 as support.The resulting material was characterized by N2 adsorption-desorption,X-ray diffraction and scanning electron microscopy.The as-prepared CuO/Fe2O3/HP-SiO2 sample,withα-Fe2O3 and CuO nanocrystals,possessed a co-continuous skeleton,through-macroporous and mesoporous structure.Its catalytic behavior for CO and o-DCB oxidation was investigated.The result showed that CuO/Fe2O3/HP-SiO2 catalyst exhibited high catalytic activity for both CO and o-DCB oxidation,indicating its potential application in combined abatement of CO and chlorinated volatile organic compounds. 展开更多
关键词 CO and o-DCB oxidation hierachically porous CuO/α-Fe2O3/HP-SiO2 monolith
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稀土Sm促进的S_2O_82-/SnO_2-Fe_2O_3固体酸的制备及表征 认领 引用
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作者 陈少峰 侯兰凤 +1 位作者 张红印 董利 《硅酸盐通报》 CAS CSCD 北大核心 2016年第10期3442-3447,共6页
以(NH4)2S2O8溶液为浸渍溶液,采用溶胶-凝胶法制备了添加稀土Sm元素的固体酸催化剂S_2O_2-8/SnO_2-Fe_2O_3-Sm_2O_3,采用FT-IR、XRD、TG-DTA等分析方法对催化剂进行表征。将催化剂应用于乙酸正丁酯的合成反应,考察了铁锡元素摩尔比、浸... 以(NH4)2S2O8溶液为浸渍溶液,采用溶胶-凝胶法制备了添加稀土Sm元素的固体酸催化剂S_2O_2-8/SnO_2-Fe_2O_3-Sm_2O_3,采用FT-IR、XRD、TG-DTA等分析方法对催化剂进行表征。将催化剂应用于乙酸正丁酯的合成反应,考察了铁锡元素摩尔比、浸渍液浓度、焙烧温度、焙烧时间和稀土含量等条件对固体酸催化性能的影响,得到催化剂的最佳制备条件为:铁锡元素摩尔比为1∶4,(NH4)2S2O8浸渍液浓度为2.0 mol/L,焙烧温度为500℃,焙烧时间为2.5 h,添加稀土氧化钐含量为3%,乙酸正丁酯的酯化率最高达98%以上。添加稀土Sm元素的催化剂稳定性能良好,再生实验表明催化剂结焦及S_2O_2-8基团的流失是催化剂失活的主要原因。 展开更多
关键词 固体酸 S2O8^2-/Sn02-Fe2O3 醋化反应 表征
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纳米SnO_2与α-Fe_2O_3复合氧化物光电特性研究 认领 引用
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作者 张忠锁 刘向阳 +2 位作者 邢前 赵伟 李蕴才 《河南大学学报（自然科学版）》 CAS 2004年第3期22-25,共4页
用Sol gel法制备了SnO2与α Fe2O3复合氧化物纳米粒子,并用XRD、紫外可见吸收光谱(UV)、表面光电压谱(SPS)以及场诱导表面光电压谱(FISPS)进行了分析和表征.XRD结果证实所制备为两种材料的复合氧化物的纳米粒子;紫外可见吸收表明吸收随... 用Sol gel法制备了SnO2与α Fe2O3复合氧化物纳米粒子,并用XRD、紫外可见吸收光谱(UV)、表面光电压谱(SPS)以及场诱导表面光电压谱(FISPS)进行了分析和表征.XRD结果证实所制备为两种材料的复合氧化物的纳米粒子;紫外可见吸收表明吸收随两种氧化物复合比例的改变有较大的变化;FISPS发现复合材料的光伏响应强度随所加正电场的增加而增加,最大强度可增加50～60倍,随所加负电场的增加而大大减弱. 展开更多
关键词 SnO2 α-Fe2O3 SPS FISPS 光电性质
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溅射SnO_2/α-Fe-2O_3薄膜的敏感特性研究 认领 引用
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作者 娄向东 沈荷生 沈瑜生 《传感技术学报》 CAS 1993年第4期51-54,共4页
薄膜元件应用前景广阔,为进一步探索多层薄膜元件的性能,我们对SnO_2及ZnO体系作了分析研究,得到了双层膜在灵敏度与选择性方面都明显优于单层膜的结论.本文介绍SnO_2/α-Fe_2O_3体系的实验结果.1 实验1.1
关键词 溅射 二氧化锡 α-Fe2O3 薄膜
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Ti/SnO_2-Sb_2O_3和Ti/SnO_2-Sb_2O_3/PbO_2-Fe阳极电催化氧化染料废水的试验研究 认领 引用
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作者 李静 刘占孟 +1 位作者 王晓淼 鲍东杰 《科技信息》 2010年第6期23-23,25,共1页
本文采用Ti/SnO2-Sb2O3和Ti/SnO2-Sb2O3/PbO2-Fe电极,以酸性橙II、茜素红、亚甲基蓝作为研究对象,考察电催化氧化法对不同染料的模拟废水的处理效果。结果表明:经60min电解后,初始浓度同为100mg/L的模拟废水,酸性橙II的去除率在80%左右... 本文采用Ti/SnO2-Sb2O3和Ti/SnO2-Sb2O3/PbO2-Fe电极,以酸性橙II、茜素红、亚甲基蓝作为研究对象,考察电催化氧化法对不同染料的模拟废水的处理效果。结果表明:经60min电解后,初始浓度同为100mg/L的模拟废水,酸性橙II的去除率在80%左右,茜素红的去除率均在65%以上,亚甲基蓝的去除率仅为45%左右。结合染料的化学结构,对电催化氧化法降解酸性橙II的效果要比茜素红和亚甲基蓝好的原因进行了分析。 展开更多
关键词 电催化氧化 Ti/SnO2-Sb2O3电极 Ti/SnO2-Sb2O3/PbO2-Fe电极
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A ternary phased SnO_2-Fe_2O_3/SWCNTs nanocomposite as a high performance anode material for lithium ion batteries 认领 引用 被引量：5
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作者 Wangliang Wu Yi Zhao +2 位作者 Jiaxin Li Chuxin Wu Lunhui Guan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第3期376-382,共7页
A new SnO2-Fe2O3/SWCNTs（single-walled carbon nanotubes） ternary nanocomposite was first synthesized by a facile hydrothermal approach.SnO2 and Fe2O3 nanoparticles（NPs） were homogeneously located on the surface of ... A new SnO2-Fe2O3/SWCNTs（single-walled carbon nanotubes） ternary nanocomposite was first synthesized by a facile hydrothermal approach.SnO2 and Fe2O3 nanoparticles（NPs） were homogeneously located on the surface of SWCNTs,as confirmed by X-ray diffraction（XRD）,transmission electron microscope（TEM） and energy dispersive X-ray spectroscopy（EDX）.Due to the synergistic effect of different components,the as synthesized SnO2-Fe2O3/SWCNTs composite as an anode material for lithium-ion batteries exhibited excellent electrochemical performance with a high capacity of 692 mAh·g-1 which could be maintained after 50 cycles at 200 mA·g-1.Even at a high rate of2000 mA·g-1,the capacity was still remained at 656 mAh·g-1. 展开更多
关键词 SWCNTs SnO2 Fe2O3 lithium ion batteries anode materials
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Synthesis of Porous MgAl2O4Fibers by Solid-state Reaction 认领 引用
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作者 WANG Xinyue XU Qing +4 位作者 ZHU Xinxin ZHOU Ruiqi DUAN Hongjuan ZHANG Haijun LI Shaoping 《China's Refractories》 CAS 2025年第4期26-30,共5页
Chemical vapor deposition is the predominant method to prepare MgAl2O4fibers.However,it faces several challenges,including exorbitantly high reaction temperatures,substantial production costs,and relatively low ... Chemical vapor deposition is the predominant method to prepare MgAl2O4fibers.However,it faces several challenges,including exorbitantly high reaction temperatures,substantial production costs,and relatively low yields.In this study,porous MgAl2O4fibers were fabricated through a solid-state reaction method,utilizing MgSO4·5Mg(OH)2·3H2O whiskers as templates,mixed with either aluminum sol orα-Al2O3micropowder.The impact of various parameters on the synthesis of porous MgAl2O4fibres was systematically investigated,including the heat treatment temperature(1000,1100 and 1300℃),the holding time(3 and 10 h)and the aluminum source(aluminum sol orα-Al2O3micropowder).The results reveal that:(1)in comparison with fibers synthesized usingα-Al2O3as the aluminum source,those prepared with aluminum sol exhibit a significantly higher generation amount of MgAl2O4;(2)as the heat treatment temperature increases,Al2O3gradually reacts with MgO,continuously increasing the formation amount of porous MgAl2O4with small and uniformly distributed nanopores,and the synthesized porous MgAl2O4fibres have small and uniform nanopores;(3)the optimal synthesis process involves using aluminum sol as the aluminum source and firing at 1300℃ for 3 h. 展开更多
关键词 MgSO4·5Mg(OH)2·3H2O whiskers aluminum sol MgAl2O4 porous fibers solid-state reaction method
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SnO2-Fe2O3复合材料应用于碳纳米管集流体对锂离子电池性能的影响 认领 引用 被引量：2
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作者 梁国东 潘鹤政 +6 位作者 孙晓刚 赖家美 邱治文 陈珑 魏成成 黄雅盼 胡浩 《复合材料学报》 EI CAS CSCD 北大核心 2019年第7期1753-1760,共8页
水热合成法制备纳米SnO2-Fe2O3复合材料,以SnO2-Fe2O3为活性物质,多壁碳纳米管(MWCNTs)导电纸代替传统铜箔作为负极集流体制作锂离子电池。采用XRD、SEM进行表征,结果显示,SnO2-Fe2O3均匀嵌入到MWCNTs构建的三维导电网络的空隙中。电化... 水热合成法制备纳米SnO2-Fe2O3复合材料,以SnO2-Fe2O3为活性物质,多壁碳纳米管(MWCNTs)导电纸代替传统铜箔作为负极集流体制作锂离子电池。采用XRD、SEM进行表征,结果显示,SnO2-Fe2O3均匀嵌入到MWCNTs构建的三维导电网络的空隙中。电化学测试结果表明,SnO2-Fe2O3/MWCNTs导电纸作为负极电极能够显著提高锂离子电池的循坏和倍率性能。在100mA/g电流密度下循环30次,SnO2-Fe2O3/MWCNTs导电纸电池比容量达到1 088mA·h/g,而在200mA/g电流密度下循环200次后,SnO2-Fe2O3/MWCNTs导电纸比容量能稳定保持在898mA·h/g,表现出良好的循环性能,逐渐增大充放电电流,电池的比容量有所下降但其库伦效率仍然保持在96%以上,而在高倍率(1 600mA/g)下进行充放电时,SnO2-Fe2O3/MWCNTs导电纸比容量仍然能够保持在547mA·h/g,之后再将电流密度降到100mA/g,比容量重新回到1 000 mA·h/g,SnO2-Fe2O3/MWCNTs导电纸表现出十分优异的电化学性能。 展开更多
关键词 SnO2 Fe2O3 碳纳米管 锂离子电池 比容量
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Preparation of porous α-Fe_2O_3-supported Pt and its sensing performance to volatile organic compounds 认领 引用 被引量：1
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作者 Yuhong Cheng Yanfei Kang +5 位作者 Liwei Wang Yao Wang Shurong Wang Yujin Li Wei Zhong Liangqun Peng 《Journal of Natural Gas Chemistry》 CSCD 2012年第1期11-16,共6页
Porous α-Fe2O3 was synthesized by a simple hydrothermal treatment of FeC13 aqueous solution followed by a calcination process. In the synthesis of porous α-Fe2O3, no templates or pore-directing agents were used. The... Porous α-Fe2O3 was synthesized by a simple hydrothermal treatment of FeC13 aqueous solution followed by a calcination process. In the synthesis of porous α-Fe2O3, no templates or pore-directing agents were used. The as-prepared porous α-Fe2O3 was further employed as a support for loading Pt nanoparticles. The gas sensing performance of the obtained porous α-Fe2O3-supported Pt to VOCs was investigated. The sensor presented a high response and fast response-recovery characteristic to several VOCs including acetone, ether, methanol, ethanol, butanol and hexanol. Meanwhile, it exhibited a much higher response than the pure α-Fe2O3 at the operating temperature of 260 ℃. The enhanced sensing properties may be related to the unique porous structure of the α-Fe2O3 support and the promoting effect of active Pt nanoparticles for the sensing reactions. 展开更多
关键词 Pt porous α-Fe2O3 sensing performance volatile organic compounds
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Solvothermal Synthesis of α-Fe2O3 Porous Nanobelts and Their Enhanced Acetone-sensing Properties 认领 引用
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作者 CHEN Hong-Wen DING Hao +2 位作者 MA Jin-Liang YUE Fang JIA Xiao 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第12期2089-2097,共9页
Porous α-Fe2O3 nanobelts have been prepared via a solvothermal route and subsequent calcination. The as-prepared nanostructure was characterized by XRD, FESEM, TEM, N2 adsorption-desorption isotherms, etc. The α-Fe2... Porous α-Fe2O3 nanobelts have been prepared via a solvothermal route and subsequent calcination. The as-prepared nanostructure was characterized by XRD, FESEM, TEM, N2 adsorption-desorption isotherms, etc. The α-Fe2O3 nanobelts presented obvious porous structures with the length of ca. 1~2μm, width of ca. 200~350 nm and thickness of ca. 30~60 nm. It was found that the assistance of inorganic additives played an important role in the shape control of α-Fe2O3 nanostructure. The gas-sensing performance of the fabricated sensor based on α-Fe2O3 nanobelts sample was also investigated, and the response towards 1000 ppm acetone can reach 24.4. In addition, the gas-sensing conductive mechanism of the sensor was also proposed. 展开更多
关键词 α-Fe2O3 nanobelt solvothermal method porous nanostructure gas-sensing performance
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2D/2D step-schemeα-Fe2O3/Bi2WO6 photocatalyst with efficient charge transfer for enhanced photo-Fenton catalytic activity 认领 引用 被引量：18
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作者 Wenliang Wang Wenli Zhao +2 位作者 Haochun Zhang Xincheng Dou Haifeng Shi 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第1期97-106,共10页
Although the traditional Fenton reaction is considered an effective strategy for solving problems caused by environmental pollution,construction of an efficient photocatalytic system by coordinating the Fenton reactio... Although the traditional Fenton reaction is considered an effective strategy for solving problems caused by environmental pollution,construction of an efficient photocatalytic system by coordinating the Fenton reaction is challenging.In this study,2D/2D step-schemeα-Fe2O3/Bi2WO6(FO/BWO)heterostructure photo-Fenton catalysts were successfully fabricated by a facile hydrothermal method.The as-prepared materials were characterized by XRD,FT-IR,TEM,XPS,UV-vis DRS,PL,I-t,EIS,and BET analyses.Under visible light irradiation,FO/BWO exhibited remarkably high and stable photo-Fenton catalytic activity for the degradation of methyl blue(MB)at low concentrations of H2O2.It was noted that FO/BWO(0.5)displayed a significantly enhanced photo-Fenton catalytic activity,which was 11.06 and 3.29 times those of FO nanosheets and BWO nanosheets,respectively.The notably improved photo-Fenton catalytic activity of FO/BWO was mainly due to the combination of H2O2 and FO under light illumination and the presence of the 2D/2D S-scheme heterostructure,with the large contact surface,abundant active sites,and efficient separation rate of photogenerated carriers playing contributory roles.Additionally,a possible catalytic mechanism for the FO/BWO composite was preliminarily proposed via active species trapping experiments.In summary,this study provided new insights into the synthesis of an effectively heterogeneous 2D/2D S-scheme photo-Fenton catalyst for degradation of organic pollutants in wastewater. 展开更多
关键词 Bi2WO6 α-Fe2O3 S-scheme Photo-Fenton 2D photocatalyst
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Hydrogen and syngas production from two-step steam reforming of methane over CeO_2-Fe_2O_3 oxygen carrier 认领 引用 被引量：18
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作者 祝星 王华 +2 位作者 魏永刚 李孔斋 程显名 《Journal of Rare Earths》 SCIE EI CAS 2010年第6期907-913,共7页
Two-step steam reforming of methane (SRM) is a novel chemical looping process towards the production of pure hydrogen and syngas (synthesis gas), consisting of a syngas production step and a water-splitting step. Rene... Two-step steam reforming of methane (SRM) is a novel chemical looping process towards the production of pure hydrogen and syngas (synthesis gas), consisting of a syngas production step and a water-splitting step. Renewable energy can be used to drive this process for hydrogen production, especially solar energy. CeO2-Fe2O3 complex oxide oxygen carrier was prepared by the impregnation method and characterized by means of X-ray diffractometer (XRD), Raman spectroscopy (Raman) and hydrogen programmed reduction (H2-TPR). CH4 temperature programmed and isothermal reactions were adopted to test syngas production reactivity, and water splitting reaction was employed to investigate water-splitting activity. Moreover, two-step SRM performance was evaluated by a successive redox cycle. The results showed that CO-uncontaminated H2 and highly selective syngas (with H2/CO ratio close to 2) could be respectively obtained from two steps, and CeFeO3 formation was found in the first redox cycle and proved to be enhanced by the redox treatment. After 10 successive cycles, obvious CeFeO3 phase was detected, which may be responsible for favorable successive redox cycle performances. 展开更多
关键词 two-step steam reforming of methane CeO2-Fe2O3 oxygen carrier redox cycle hydrogen syngas rare earths
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CaO-SiO_2-Al_2O_3-Fe_2O_3渣系脱磷行为 认领 引用 被引量：11
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作者 王多刚 李杰 +2 位作者 夏云进 张雷 虞大俊 《钢铁研究学报》 CAS CSCD 北大核心 2016年第7期20-25,共6页
利用Factsage软件计算了Al2O3含量对CaO-SiO2-Al2O3-Fe2O3四元渣系熔点和黏度的影响,并通过实验研究了在1 400℃时,CaO-SiO2-Al2O3-Fe2O3四元渣系对高磷铁水脱磷行为的影响。结果表明：渣中Al2O3的质量分数在3%~6%之间时,随着Al2O3含量... 利用Factsage软件计算了Al2O3含量对CaO-SiO2-Al2O3-Fe2O3四元渣系熔点和黏度的影响,并通过实验研究了在1 400℃时,CaO-SiO2-Al2O3-Fe2O3四元渣系对高磷铁水脱磷行为的影响。结果表明：渣中Al2O3的质量分数在3%~6%之间时,随着Al2O3含量的增加,渣系的熔化温度迅速降低,进一步增加渣中的Al2O3含量,渣系的熔化温度逐渐增加;Al2O3对CaO-SiO2-Al2O3-Fe2O3渣系的黏度影响不大;渣中Al2O3的质量分数在3%~6%之间变化时,渣系脱磷能力变化不是很大,脱磷率维持在91%左右,进一步增加渣系中Al2O3的量,脱磷率逐渐下降;Al2O3对脱磷率产生影响可能是其改变了炉渣中液相所占比例,进而影响磷从铁水中向液相渣的传质过程。 展开更多
关键词 CaO-SiO2-Al2O3-Fe2O3渣系 脱磷 熔化温度 液相
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固相法制备α-Fe_2O_3纳米粒子 认领 引用 被引量：43
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作者 邱春喜 姜继森 +1 位作者 赵振杰 杨燮龙 《无机材料学报》 SCIE EI CAS 北大核心 2001年第5期957-960,共4页
用固相反应法合成了纳米α－Fe2O3粒子。采用XRD、TEM、Mossbauer对合成样品进行表征，结果表明此方法合成的粒子为α－Fe2O3．其粒子呈花生型，粒子直径为20～40nm左右．
关键词 固相合成 纳米粒子 α-Fe2O3 α-三氧化二铁 纳米材料
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One-pot hydrothermal fabrication of α-Fe_2O_3@C nanocomposites for electrochemical energy storage 认领 引用 被引量：10
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作者 Maiyong Zhu Jiarui Kan +4 位作者 Jianmei Pan Wenjie Tong Qi Chen Jiacheng Wang Songjun Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第1期1-8,共8页
A facile hydrothermal method was developed for the preparation of Fe_2O_3@C nanocomposites using FeCl_3·6H_2O as iron source and glucose as carbon source under alkaline condition. The morphology and structure of ... A facile hydrothermal method was developed for the preparation of Fe_2O_3@C nanocomposites using FeCl_3·6H_2O as iron source and glucose as carbon source under alkaline condition. The morphology and structure of the as-prepared product were identified by transmission electron microscopy(TEM), high resolution transmission electron microscopy(HRTEM), field-emission scanning electron microscopy(FESEM),X-ray diffraction(XRD), Raman spectroscopy, Fourier Transform infrared spectroscopy(FTIR), and thermogravimetric analysis(TGA). The as-prepare α-Fe_2O_3@C nanocomposites were employed for supercapacitor electrode material. The synergistic combination of carbon electrical double-layer capacitance and α-Fe_2O_3 pseudo-capacitance established such nanocomposites as versatile platform for high performance supercapacitors. The synthesis method developed here is expected to obtain other metal oxide/carbon composite. 展开更多
关键词 α-Fe2O3 Carbon Hydrothermal Pseudocapacitor
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纳米α-Fe_2O_3-TiO_2改性海藻酸钠/壳聚糖双极膜制备与表征 认领 引用 被引量：10
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作者 陈日耀 陈震 +2 位作者 陈晓 郑曦 孙婷 《无机化学学报》 SCIE CAS 北大核心 2010年第10期1790-1795,共6页
在壳聚糖(CS)阴离子交换膜中添加纳米复合半导体材料α-Fe2O3-TiO2,制备了PVA-SA/α-Fe2O3-TiO2-CS双极膜(PVA:聚乙烯醇;SA:海藻酸钠),并用扫描电镜、热重分析、电子万能试验机和接触角测定仪等对其进行了表征。研究结果表明,添加纳米α... 在壳聚糖(CS)阴离子交换膜中添加纳米复合半导体材料α-Fe2O3-TiO2,制备了PVA-SA/α-Fe2O3-TiO2-CS双极膜(PVA:聚乙烯醇;SA:海藻酸钠),并用扫描电镜、热重分析、电子万能试验机和接触角测定仪等对其进行了表征。研究结果表明,添加纳米α-Fe2O3-TiO2可提高双极膜的亲水性、热稳定性和机械性能。纳米α-Fe2O3-TiO2复合半导体材料较纳米α-Fe2O3或纳米TiO2单一半导体材料具有更强的光催化双极膜中间界面层水解离能力,在高压汞灯照射下能大大降低双极膜的膜阻抗和膜电阻压降(IR降)。 展开更多
关键词 双极膜 光催化 水解离 纳米α-Fe2O3 纳米TiO2
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