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Facile synthesized Cu-SnO2 anode materials with three-dimensional metal cluster conducting architecture for high performance lithium-ion batteries 认领 引用 被引量：3
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作者 Zhijia Zhang Yuxuan Hou +9 位作者 Shaofei Zhang Guoliang Zhang Ming Li Huanming Lu Yong Li Xuerong Zheng Zhijun Qiao Zhenyang Yu Qin Huang Jianli Kang 《Chinese Chemical Letters》 SCIE CAS CSCD 2018年第11期1656-1660,共5页
Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however... Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however, restrict the commercialization of metal oxide anode material. In this work, we design a novel Cu-SnO2 composite derived from Cu6Sn5 alloy with three dimensional （3D） metal cluster conducting architecture. The novel Cu structure penetrates in the composite particles inducing high conductivity and space-confined SnO2, which restrict the pulverization of SnO2 during lithiation/ delithiation process. The optimized Cu-SnO2 composite anode delivers an initial discharge capacity of 933.7 mA h/g and retains a capacity of 536.1 mA h/g after 200 cycles, at 25℃ and a rate of 100 mA/g. Even at the high rate of 300 mA/g, the anode still exhibits a capacity of more than 29% of that tested at 50 mA/g. Combining with the phase and morphology analysis, the novel Cu-SnO2 composite not only has good electrical conductivity, but also possesses high theoretical capacity （995 mAh/g）, which may pave a new way for the design and construction of next-generation metal oxide anode materials with high power and cycling stability. 展开更多
关键词 Cu-SnO2 composite Cu6Sn5 alloy Ball milling Anode materials Lithium-ion batteries
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Microstructure and Mechanical Performance of Cu-SnO_2-rGO based Composites Prepared by Plasma Activated Sintering 认领 引用 被引量：3
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作者 罗国强 HUANG Jing +4 位作者 JIN Zhipeng LI Meijuan JIANG Xiaojuan SHEN Qiang ZHANG Lianmeng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第6期1152-1158,共7页
A novel chemical technique combined with unique plasma activated sintering（PAS） was utilized to prepare consolidated copper matrix composites（CMCs） by adding Cu-SnO2-rGO layered micro powders as reinforced fillers... A novel chemical technique combined with unique plasma activated sintering（PAS） was utilized to prepare consolidated copper matrix composites（CMCs） by adding Cu-SnO2-rGO layered micro powders as reinforced fillers into Cu matrix. The repeating Cu-SnO2-rGO structure was composed of inner dispersed reduced graphene oxide（r GO）, SnO2 as intermedia and outer Cu coating. SnO2 was introduced to the surface of rGO sheets in order to prevent the graphene aggregation with SnO2 serving as spacer and to provide enough active sites for subsequent Cu deposition. This process can guarantee rGO sheets to suffi ciently disperse and Cu nanoparticles to tightly and uniformly anchor on each layer of rGO by means of the SnO2 active sites as well as strictly control the reduction speed of Cu^2＋. The complete cover of Cu nanoparticles on rGO sheets thoroughly avoids direct contact among rGO layers. Hence, the repeating structure can simultaneously solve the wettability problem between rGO and Cu matrix as well as improve the bonding strength between rGO and Cu matrix at the well-bonded Cu-SnO2-rGO interface. The isolated rGO can effectively hinder the glide of dislocation at Cu-rGO interface and support the applied loads. Finally, the compressive strength of CMCs was enhanced when the strengthening effi ciency reached up to 41. 展开更多
关键词 graphene Cu-SnO2-rGO structure copper matrix composites sensitization plasma activated sintering mechanical property
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在Cu-SnO_2/Al_2O_3催化剂上顺酐的选择性加氢 认领 引用 被引量：5
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作者 卢伟京 卢冠忠 毛俊 《华东理工大学学报（自然科学版）》 EI CAS 北大核心 2003年第4期388-391,共4页
在Cu-SnO2/Al2O3催化剂中,研究制备方法对顺酐加氢产物的调控。结果表明,采用共沉淀-浸渍法和共沉淀法制备的Cu-SnO2/Al2O3催化剂有较高的顺酐加氢制γ-丁内酯选择性,如使用共沉淀-浸渍法制备的催化剂,在280°C,顺酐转化率为94.4%,... 在Cu-SnO2/Al2O3催化剂中,研究制备方法对顺酐加氢产物的调控。结果表明,采用共沉淀-浸渍法和共沉淀法制备的Cu-SnO2/Al2O3催化剂有较高的顺酐加氢制γ-丁内酯选择性,如使用共沉淀-浸渍法制备的催化剂,在280°C,顺酐转化率为94.4%,γ-丁内酯选择性为100%;而采用浸渍法制备的催化剂有较高的琥珀酸酐选择性,在220°C,顺酐转化率为98.5%,玻珀酸酐选择性为76.4%。 展开更多
关键词 Cu-SnO2/Al2O3催化剂 产物的调控 选择性加氢 顺酐
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掺杂对Cu/SnO_2电触头材料的性能影响 认领 引用 被引量：5
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作者 赵文杰 王俊勃 +3 位作者 王瑞娟 王彦龙 刘松涛 胡泽涛 《航空材料学报》 CAS CSCD 北大核心 2015年第6期60-64,共5页
通过高能球磨工艺制备了掺杂Cu/Sn O2电触头材料,采用XRD评估了Cu/Sn O2的混粉效果,利用SEM对电触头材料的微观形貌以及电弧烧蚀形貌进行了观察,测试了电触头材料的电导率和硬度,系统研究了混粉时间、烧结温度以及不同掺杂对Cu/Sn O2电... 通过高能球磨工艺制备了掺杂Cu/Sn O2电触头材料,采用XRD评估了Cu/Sn O2的混粉效果,利用SEM对电触头材料的微观形貌以及电弧烧蚀形貌进行了观察,测试了电触头材料的电导率和硬度,系统研究了混粉时间、烧结温度以及不同掺杂对Cu/Sn O2电触头材料的性能影响。结果表明:Cu/Sn O2混粉时间4h,850℃烧结的Cu/Sn O2电触头材料物理性能最佳,其电导率达到49.0%IACS,硬度达到122.0HV;添加La2O3的Cu/Sn O2电触头材料的电弧烧蚀轻微,具有良好的耐电弧烧蚀特性。 展开更多
关键词 高能球磨 Cu/SnO2电触头 物理性能 电弧烧蚀
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Cu基电触头用掺杂SnO_2纳米粉体的制备 认领 引用 被引量：7
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作者 王清周 陆东梅 +1 位作者 崔春翔 徐萌 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2014年第8期1979-1982,共4页
利用溶胶-凝胶工艺制备了Cu基电触头用TiO2掺杂SnO2纳米粉。实验时,首先采用TG-DSC方法对掺杂SnO2前驱体在升温过程中的转变过程进行了分析,然后采用XRD对不同温度焙烧所得掺杂SnO2粉体进行了物相分析、颗粒粒径计算,采用TEM对掺杂SnO2... 利用溶胶-凝胶工艺制备了Cu基电触头用TiO2掺杂SnO2纳米粉。实验时,首先采用TG-DSC方法对掺杂SnO2前驱体在升温过程中的转变过程进行了分析,然后采用XRD对不同温度焙烧所得掺杂SnO2粉体进行了物相分析、颗粒粒径计算,采用TEM对掺杂SnO2粉体的微观形貌进行了观察,最后通过分析掺杂SnO2粉体晶格参数d值的变化对粉体的掺杂效果进行了评估。结果表明:通过所述工艺成功实现了TiO2对纳米SnO2的掺杂,500℃焙烧所得掺杂SnO2为圆球形,粒径约为10 nm,较好地满足Cu基电触头材料使用的需求。 展开更多
关键词 Cu基电触头 SnO2 掺杂 溶胶-凝胶
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纳米Pd-Cu/SnO_2复合催化还原硝酸盐氮 认领 引用 被引量：2
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作者 程建华 胡勇有 吴以保 《华南理工大学学报（自然科学版）》 EI CAS 北大核心 2010年第8期137-141,146,共5页
采用热分解法制备纳米SnO2，并运用浸渍法制备Pd—Cu负载在SnO2上的双金属纳米负载型催化剂．对纳米SnO2进行x射线衍射、透射电镜、比表面积分析；以甲酸为还原剂，在常压下考察了纳米Pd．Cu／SnO2催化还原硝酸盐氮的活性和选择性．结... 采用热分解法制备纳米SnO2，并运用浸渍法制备Pd—Cu负载在SnO2上的双金属纳米负载型催化剂．对纳米SnO2进行x射线衍射、透射电镜、比表面积分析；以甲酸为还原剂，在常压下考察了纳米Pd．Cu／SnO2催化还原硝酸盐氮的活性和选择性．结果表明：制备的纳米SnO2的晶粒粒径为8．9～10．4nm或9．3～10．7nm，颗粒粒径在10．0nm左右。BET比表面积最大为144．9892m2／g；催化还原硝酸盐氮的Pd—Cu配比为6：1，甲酸的投加量为16．0mmol／L时，硝酸盐氮的去除率为100．00％，催化活性达到0．119mmol／（min·g），总氮的去除率为76．23％，反应的最佳pH值为4．0． 展开更多
关键词 SnO2 Pd—Cu/SnO2 甲酸 硝酸盐氮 催化还原
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Zn,Cu共掺杂的TiO_2:SnO_2薄膜的制备及性能研究 认领 引用 被引量：2
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作者 伞靖 魏长平 +1 位作者 何瑞英 彭春佳 《发光学报》 EI CAS CSCD 北大核心 2016年第9期1109-1113,共5页
用溶胶-凝胶法制得Zn,Cu共掺杂的TiO_2∶SnO_2凝胶,旋转法于玻璃基底镀膜,制备出Zn,Cu共掺杂的TiO_2∶SnO_2薄膜,探讨了掺杂比例、煅烧温度对其结构、形貌和性能的影响。采用XRD、FTIR、FESEM、PL等测试技术对薄膜进行表征,并考察了其... 用溶胶-凝胶法制得Zn,Cu共掺杂的TiO_2∶SnO_2凝胶,旋转法于玻璃基底镀膜,制备出Zn,Cu共掺杂的TiO_2∶SnO_2薄膜,探讨了掺杂比例、煅烧温度对其结构、形貌和性能的影响。采用XRD、FTIR、FESEM、PL等测试技术对薄膜进行表征,并考察了其对甲基橙的光催化降解性能。结果表明:600℃时,薄膜粒子的结晶度较高,粒径小,分布均匀,表面平整且无明显裂痕;紫外-可见光谱(UV-Vis)表明:该薄膜在可见光区和紫外区都有很强的吸收;光催化性能测试表明:与纯相TiO_2对比,该样品对甲基橙的光催化降解率有较大提高,在最佳掺杂量比为n(Ti)∶n(Sn)∶n(Zn)∶n(Cu)=10∶3∶1∶1时,光催化降解率最高。 展开更多
关键词 溶胶-凝胶 TiO2:SnO2 Zn,Cu共掺杂 光催化 薄膜
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Cu^2+/SnO2复合纳米光催化剂的制备及其对海洋柴油污染物的降解 认领 引用
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作者 廖佳琪 于晓彩 +3 位作者 朱婉婷 田思瑶 薛碧凝 于润强 《应用海洋学学报》 CAS CSCD 北大核心 2020年第3期419-426,共8页
采用化学沉淀法成功制备了Cu^2+/SnO2复合纳米光催化剂,采用XRD、SEM等测试手段对复合纳米光催化剂的粒径、形态等进行表征。在紫外光条件下,分别改变催化剂掺杂比、催化剂煅烧温度、催化剂投加量、柴油初始含量和光照时间等单因素,探... 采用化学沉淀法成功制备了Cu^2+/SnO2复合纳米光催化剂,采用XRD、SEM等测试手段对复合纳米光催化剂的粒径、形态等进行表征。在紫外光条件下,分别改变催化剂掺杂比、催化剂煅烧温度、催化剂投加量、柴油初始含量和光照时间等单因素,探究不同条件对Cu^2+/SnO2复合纳米光催化剂降解海洋柴油污染物的影响。结果表明,自制复合纳米光催化剂可以有效降解海水中的柴油污染物,在紫外光作用下,于400℃下煅烧Cu/Sn掺杂比为0.03的Cu^2+/SnO2复合纳米光催化剂、投加量为0.2 g/dm^3、柴油初始含量为0.15 g/dm^3、H2O2溶液含量为0.2 g/dm^3、溶液的pH为7、光照时间3 h时效果最好,海水中柴油的去除率最高,达到86.98%。Cu^2+/SnO2复合纳米光催化剂用聚丙烯纳米球负载后可以实际应用于海洋中,便于回收。 展开更多
关键词 海洋环境科学 Cu^2+/SnO2复合纳米光催化剂 海洋柴油污染物 光催化降解 掺杂
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Zn-Cu-codoped SnO_2 nanoparticles: Structural, optical, and ferromagnetic behaviors 认领 引用
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作者 Syed Zulfiqar Zainab Iqbal 吕建国 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第12期397-401,共5页
Zn-Cu-codoped SnO2 nanoparticles have been synthesized by chemical precipitation method. All nanoparticles are crystalline, with the average size increases from 2.55 nm to 4.13 nm as the calcination temperature increa... Zn-Cu-codoped SnO2 nanoparticles have been synthesized by chemical precipitation method. All nanoparticles are crystalline, with the average size increases from 2.55 nm to 4.13 nm as the calcination temperature increases from 400℃ to 600℃. The high calcination temperature can enhance the crystalline quality and grain growth. The oxygen content decreases with decreasing calcination temperature; at a low temperature of 400℃, Zn-Cu-codoped SnO2 nanoparticles are in a rather oxygen-poor state having many oxygen vacancies. The optical band gap energies of Zn-Cu-codoped SnO2 nanoparticles calcined at 400℃ and 600℃ are decreased from 3.93 eV to 3.62 eV due to quantum confinement effects. Both samples exhibit room-temperature ferromagnetism, with a larger saturation magnetization at 400℃ due to the presence of large density of defects such as oxygen vacancies. Zn-Cu-codoped SnO2 nanoparticles exhibit large optical band gap energies and room temperature ferromagnetism, which make them potential candidates for applications in optoelectronics and spintronics. 展开更多
关键词 SnO2 nanoparticles Zn-Cu codoping optical band gap energy ferromagnetism
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耐负荷的Ag-Cu-C-SnO_2触头材料的制备 认领 引用 被引量：1
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作者 骆瑞雪 《稀有金属快报》 2006年第4期38-40,共3页
将一定比例的Cu、石墨、SnO2粉末混合装入7根纯铜管内,封口后再以密排方式装入一银管中。采用多次挤压-拉拔连续纤维复合工艺制备出了Ag-Cu-C-SnO2复合触头材料。用金相显微镜观察了材料组织结构,测试了材料的机械性能、电性能等,并进... 将一定比例的Cu、石墨、SnO2粉末混合装入7根纯铜管内,封口后再以密排方式装入一银管中。采用多次挤压-拉拔连续纤维复合工艺制备出了Ag-Cu-C-SnO2复合触头材料。用金相显微镜观察了材料组织结构,测试了材料的机械性能、电性能等,并进行了寿命试验。结果表明,多次挤压-拉拔工艺可以制备连续纤维化的Ag-Cu-C-SnO2复合材料,其接触电阻稳定,有较好的抗熔焊性和抗电弧烧损性。材料经直流28V,40A电负荷下,工作寿命之在3000次以上,可在大、中负荷下的多种继电器、接触器上得到应用。 展开更多
关键词 触头材料 Ag-Cu-C-SnO2复合丝 连续纤维复合工艺 材料性能
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Investigation of lattice capacity effect on Cu2+-doped SnO2 solid solution catalysts to promote reaction performance toward NOx-SCR with NH3 认领 引用 被引量：1
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作者 Xianglan Xu Yunyan Tong +7 位作者 Jingyan Zhang Xiuzhong Fang Junwei Xu Fuyan Liu Jianjun Liu Wei Zhong Olga ELebedeva Xiang Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第5期877-888,共12页
To understand the effect of the doping amount of Cu^2+ on the structure and reactivity of SnO2 in NOx-SCR with NH3, a series of Sn-Cu-O binary oxide catalysts with different Sn/Cu ratios have been prepared and thoroug... To understand the effect of the doping amount of Cu^2+ on the structure and reactivity of SnO2 in NOx-SCR with NH3, a series of Sn-Cu-O binary oxide catalysts with different Sn/Cu ratios have been prepared and thoroughly characterized. Using the XRD extrapolation method, the SnO2 lattice capacity for Cu^2+ cations is determined at 0.10 g Cu O per g of SnO2, equaling a Sn/Cu molar ratio of 84/16. Therefore, in a tetragonal rutile SnO2 lattice, only a maximum of 16% of the Sn4+ cations can be replaced by Cu^2+ to form a stable solid solution structure. If the Cu content is higher, Cu O will form on the catalyst surface, which has a negative effect on the reaction performance. For samples in a pure solid solution phase, the number of surface defects increase with increasing Cu content until it reaches the lattice capacity, as confirmed by Raman spectroscopy. As a result, the amounts of both active oxygen species and acidic sites on the surface, which critically determine the reaction performance, also increase and reach the maximum level for the catalyst with a Cu content close to the lattice capacity. A distinct lattice capacity threshold effect on the structure and reactivity of Sn-Cu binary oxide catalysts has been observed. A Sn-Cu catalyst with the best reaction performance can be obtained by doping the SnO2 matrix with the lattice capacity amount of Cu^2+. 展开更多
关键词 SnO2-based solid solution Lattice capacity of Cu^2+ XRD extrapolation method NOx-SCR with NH3 Threshold effect
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High Sensitivity of Porous Cu-Doped SnO2 Thin Films to Methanol 认领 引用
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作者 Sara Benzitouni Mourad Zaabat +6 位作者 Aicha Khial Djamil Rechem Ahlem Benaboud Dhikra Bouras Abdelhakim Mahdjoub Mahdia Toubane Raphael Coste 《Advances in Nanoparticles》 CAS 2016年第2期140-148,共9页
Porous Cu-doped SnO2 thin films were synthesized by the sol-gel dip-coating method for enhancing methanol sensing performance. The effect of Cu doping concentration on the SnO2 sensibility was investigated. XRD data c... Porous Cu-doped SnO2 thin films were synthesized by the sol-gel dip-coating method for enhancing methanol sensing performance. The effect of Cu doping concentration on the SnO2 sensibility was investigated. XRD data confirm that the fabricated SnO2 films are polycrystalline with tetragonal rutile crystal structure. AFM and SEM micrographs confirmed the roughness and the porosity of SnO2 surface, respectively. UV-Vis spectrum shows that SnO2 thin films exhibit high transmittance in the visible region &#126;95%. The band gap (3.80 - 3.92 eV) and the optical thickness (893 - 131 nm) of prepared films were calculated from transmittance data. The sensing results demonstrate that SnO2 films have a high sensitivity and a fast response to methanol. In particular, 3% Cu-SnO2 films have a higher sensitivity (98%), faster response (10-2 s) and shorter recovery time (18 s) than other films. 展开更多
关键词 SnO2 Cu-Doped Sensitivity Porosity Response Time Band Gap Thin Films
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