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Enabling High-Performance Sodium Battery Anodes by Complete Reduction of Graphene Oxide and Cooperative In-Situ Crystallization of Ultrafine SnO_(2)Nanocrystals 被引量:2
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作者 Junwu Sang Kangli Liu +4 位作者 Xiangdan Zhang Shijie Zhang Guoqin Cao Yonglong Shen Guosheng Shao 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第3期356-365,共10页
The main bottleneck against industrial utilization of sodium ion batteries(SIBs)is the lack of high-capacity electrodes to rival those of the benchmark lithium ion batteries(LIBs).Here in this work,we have developed a... The main bottleneck against industrial utilization of sodium ion batteries(SIBs)is the lack of high-capacity electrodes to rival those of the benchmark lithium ion batteries(LIBs).Here in this work,we have developed an economical method for in situ fabrication of nanocomposites made of crystalline few-layer graphene sheets loaded with ultrafine SnO_(2)nanocrystals,using short exposure of microwave to xerogel of graphene oxide(GO)and tin tetrachloride containing minute catalyzing dispersoids of chemically reduced GO(RGO).The resultant nanocomposites(SnO_(2)@MWG)enabled significantly quickened redox processes as SIB anode,which led to remarkable full anode-specific capacity reaching 538 mAh g^(−1)at 0.05 A g^(−1)(about 1.45 times of the theoretical capacity of graphite for the LIB),in addition to outstanding rate performance over prolonged charge–discharge cycling.Anodes based on the optimized SnO_(2)@MWG delivered stable performance over 2000 cycles even at a high current density of 5 A g^(−1),and capacity retention of over 70.4%was maintained at a high areal loading of 3.4 mg cm^(−2),highly desirable for high energy density SIBs to rival the current benchmark LIBs. 展开更多
关键词 in situ compositing microwave reduced graphene oxide sodium ion battery sodium ion battery anode ultrafine SnO_(2)nanocrystals
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Ti/SnO_(2)-Sb-Ni电极电化学氧化去除水中BIT
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作者 杨洁 耿聰 +4 位作者 高维春 关银燕 梁吉艳 张立宝 刘振兴 《环境保护科学》 CAS 2024年第4期112-117,共6页
1,2-苯并异噻唑啉-3-酮(BIT)是一种新型广谱工业杀菌剂,因其强杀菌能力而难以直接通过传统生化法处理,电化学氧化是一种有效的预处理方法。通过实验对比不同典型阳极对BIT去除率的影响;以锑镍共掺杂钛基二氧化锡电极(Ti/SnO_(2)-Sb-Ni)... 1,2-苯并异噻唑啉-3-酮(BIT)是一种新型广谱工业杀菌剂,因其强杀菌能力而难以直接通过传统生化法处理,电化学氧化是一种有效的预处理方法。通过实验对比不同典型阳极对BIT去除率的影响;以锑镍共掺杂钛基二氧化锡电极(Ti/SnO_(2)-Sb-Ni)为阳极电化学氧化BIT,考察BIT电化学氧化过程中不同初始BIT浓度、初始pH、电流密度和硫酸钠浓度等操作参数对BIT去除率的影响,结合紫外-可见吸收光谱和荧光光谱分析,探究BIT降解过程中的结构变化。结果表明:相较于商业电极,Ti/SnO_(2)-Sb-Ni电极可高效电化学氧化BIT及其产物,消除其生物毒性;Ti/SnO_(2)-Sb-Ni电极电化学氧化BIT过程中,最佳电流密度为15 mA/cm^(2),pH和初始硫酸钠浓度对BIT降解影响较小,最佳BIT初始浓度15 mg/L,BIT降解过程中杂环先被破坏,苯环再被破坏。 展开更多
关键词 BIT Ti/SnO_(2)-Sb-Ni电极 电化学氧化 预处理
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TNTs结构强化TNTs/SnO_(2)-Sb电极电催化活性的影响机制
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作者 杨莉莎 郭颜铭 《燃料化学学报(中英文)》 EI CAS CSCD 北大核心 2024年第5期687-697,共11页
采用溶剂热法制备了TNTs/SnO_(2)-Sb电极,通过调整氧化电压和氧化时间构建出不同结构的二氧化钛纳米管(TNTs)阵列,以探究其对电极结构和电化学性能的影响。SEM和接触角测试表明,相较于阳极氧化时间,阳极氧化电压是影响TNTs阵列形貌和表... 采用溶剂热法制备了TNTs/SnO_(2)-Sb电极,通过调整氧化电压和氧化时间构建出不同结构的二氧化钛纳米管(TNTs)阵列,以探究其对电极结构和电化学性能的影响。SEM和接触角测试表明,相较于阳极氧化时间,阳极氧化电压是影响TNTs阵列形貌和表面亲水性的主要因素。SEM、XRD、LSV和EIS结果表明,TNTs阵列孔径的大小影响了催化涂层的形貌、晶粒尺寸以及电极的析氧电位。XPS、EPR和羟基自由基(·OH)生成测试表明,涂层表面致密且粒径较小有利于电极表面获得更多的氧空位,且氧空位浓度越高,吸附氧物种越多,从而增强了活性自由基的形成以及对有机物的降解。以长度950 nm,孔径100 nm的TNTs阵列层为基底时,所制备的电极TNTs(25 V)/SnO_(2)-Sb展现出了最佳的苯酚处理效果(92%±4.6%,2 h)。 展开更多
关键词 TNTs结构 SnO_(2)-Sb电极 溶剂热 氧空位 电催化氧化
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Preparation and characterization of Ce_(1-x)Fe_xO_2 complex oxides and its catalytic activity for methane selective oxidation 被引量:7
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作者 李孔斋 王华 +1 位作者 魏永刚 刘明春 《Journal of Rare Earths》 SCIE EI CAS CSCD 2008年第2期245-249,共5页
A series of Ce1-xFexO2 (x=0, 0.2, 0.4, 0.6, 0.8, 1) complex oxide catalysts were prepared using the coprecipitation method. The catalysts were characterized by means of XRD and H2-TPR. The reactions between methane ... A series of Ce1-xFexO2 (x=0, 0.2, 0.4, 0.6, 0.8, 1) complex oxide catalysts were prepared using the coprecipitation method. The catalysts were characterized by means of XRD and H2-TPR. The reactions between methane and lattice oxygen from the complex oxides were investigated. The characteristic results revealed that the combination of Ce and Fe oxide in the catalysts could lower the temperature necessary to reduce the cerium oxide. The catalytic activity for selective CH4 oxidation was strongly influenced by dropped Fe species. Adding the appropriate amount of Fe2O3 to CeO2 could promote the action between CH4 and CeO2. Dispersed Fe2O3 first returned to the original state and would then virtually form the Fe species on the catalyst, which could be considered as the active site for selective CH4 oxidation. The appearance of carbon formation was significant and the oxidation of carbon appeared to be the rate-determining step; the amounts of surface reducible oxygen species in CeO2 were also relevant to the activity. Among all the catalysts, Ce0.6Fe0.402 exhibited the best activity, which converted 94.52% of CH4 at 900 ℃. 展开更多
关键词 Ce1-xFexO2 complex oxides H2-TPR lattice oxygen methane selective oxidation rare earths
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Synthesis and Magnetic Properties of Copper (Ⅱ) Complexes with Pyridine N-Oxide-2-ylmethy-lidenedithiocarbazate as Ligands
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作者 Gou Shaohua , You Xiaozeng and Xu Zheng (Coordination Chemistry Institute, Nanjing University, Nanjing)Zhu Duolin and Yu Yunpen (Department of Chemistry, Zhenjiang Teacher’ s College, Zhenjiang) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1990年第4期255-261,共7页
A series of copper (Ⅱ) complexes with pyridine N- oxide- 2- ylmethylidened-ithiocarbazates as ligands were synthesized and characterized by IR spectra, electronic spectra and magnetic moments measurement at room temp... A series of copper (Ⅱ) complexes with pyridine N- oxide- 2- ylmethylidened-ithiocarbazates as ligands were synthesized and characterized by IR spectra, electronic spectra and magnetic moments measurement at room temperature. Variable temperature magnetic susceptibilites (3-300K) of four complexs were measured and fitted with the Bleaney-Bowers dimer equation by considering the magnetic interaction between molecules. The fitting results show the existence of intramolecular ferromagnetic interactions and intermolecu-lar anti-ferromagnetic interactions in these copper( Ⅱ) complexes. 展开更多
关键词 Pyridine N-oxide-2-ylmethylidenedithiocarbazate Copper(Ⅱ) complex Magnetic susceptibility
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Cu-Zr复合氧化物催化耦合甘油和CO_(2)合成碳酸甘油酯 被引量:1
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作者 徐换换 柯义虎 《燃料化学学报(中英文)》 EI CAS CSCD 北大核心 2024年第2期171-183,共13页
采用水热法合成了一系列不同Cu-Zr物质的量比的Cu1-xZrxO_(2)双金属氧化物,以此为催化剂,将生物柴油生产过程副产物甘油与温室气体CO_(2)耦合反应制备精细化工产品碳酸甘油酯。结果表明,Zr掺杂量不同,催化剂对甘油羰基化反应效果呈现明... 采用水热法合成了一系列不同Cu-Zr物质的量比的Cu1-xZrxO_(2)双金属氧化物,以此为催化剂,将生物柴油生产过程副产物甘油与温室气体CO_(2)耦合反应制备精细化工产品碳酸甘油酯。结果表明,Zr掺杂量不同,催化剂对甘油羰基化反应效果呈现明显差距,最佳反应条件下,Cu0.99Zr0.01O_(2)催化剂具有最佳催化性能,甘油转化率和碳酸甘油酯选择性分别达到64.1%和85.9%。并且发现与纯CuO和纯ZrO_(2)相比,Cu1-xZrxO_(2)复合氧化物在甘油与CO_(2)耦合反应体系中表现出更强的催化活性,结合X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、N2吸附-脱附、程序升温还原(H2-TPR)、程序升温脱附(TPD)、傅里叶变换红外光谱(FT-IR)等表征手段,推测高活性与Zr在CuO表面的分散程度、催化剂表面氧物种含量及酸碱性位点数量有关。此外,为了研究催化剂的稳定性,以Cu0.99Zr0.01O_(2)催化剂作为基准进行了循环性能测试,结果表明,经过六次循环后,甘油的转化率和碳酸甘油酯的选择性未发生明显变化,说明该催化剂稳定性良好。 展开更多
关键词 甘油 碳酸甘油酯 二氧化碳 复合氧化物 2-氰基吡啶
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Crystal and Molecular Structure of Copper (Ⅱ) Dimeric Complex of S-Methyl-β-N-(Pyridine N-Oxide-2-ylmethylidene) Dithiocarbazate with Acetonitrile
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作者 Yu Kaibei and Zhou Zhongyuan (Chengdu Center of Analysis and Determination, Academia Sinica, Chengdu)Gou Shaohua, You Xiaozeng and Xu Zheng (Coordination Chemistry Institute, Nanjing University, Nanjing) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1990年第4期262-265,共4页
The crystal and molecular structure of copper(Ⅱ) dimeric complex of S-methyl-B-N-(pyridine N-oxide-2-ylmethylidene) dithiocarbazate with acetonitrile, [CuL (CH3CN)]2 (ClO4)2, was determined by X-ray diffraction. The ... The crystal and molecular structure of copper(Ⅱ) dimeric complex of S-methyl-B-N-(pyridine N-oxide-2-ylmethylidene) dithiocarbazate with acetonitrile, [CuL (CH3CN)]2 (ClO4)2, was determined by X-ray diffraction. The complex crystalizes in monoclinic system with space group P21/n, a= 7. 685(2), 6=20.160(6), c= 10. 847(5) A ,B = 107.89(3), Z=2,Dc=1.788 g/cm3, F(000) = 835. 8, u= 18. 17 cm-1(Moka,R= 0. 057.Each Cu(Ⅱ) ion in the complex is surrounded by a distorted square pyramidal. The basal plane is comprised of S, N and O atoms of one ligand together with a N atom of the solvent--acetonitrile, while the axial position is occupied by the S atom of the other ligand. The bond length of Cu-S(bridging) is 3. 038A . and Cu-Cu distance is 3. 700A. 展开更多
关键词 Complex of Cu (Ⅱ) Crystal and molecular structure Dimeric complex S-methyl-β-N-(pyridine N-oxide-2-ylmethyndene)dithiocarbazate
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Ti/SnO_(2)-Sb-Ni-F电极的制备及其电催化降解罗丹明B性能研究
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作者 郭乃华 褚佳 +2 位作者 杨凡 贾伟航 熊善新 《当代化工》 CAS 2023年第12期2773-2778,共6页
采用溶胶凝胶法和热分解法制备不同煅烧温度和涂刷次数条件下的Ti/SnO_(2)-Sb-Ni-F电极,并探究其对罗丹明B染料模拟废水的降解效果。通过X射线衍射仪(XRD)和扫描电子显微镜(SEM)对其物相组成及表面形貌进行表征;运用循环伏安法(CV)、计... 采用溶胶凝胶法和热分解法制备不同煅烧温度和涂刷次数条件下的Ti/SnO_(2)-Sb-Ni-F电极,并探究其对罗丹明B染料模拟废水的降解效果。通过X射线衍射仪(XRD)和扫描电子显微镜(SEM)对其物相组成及表面形貌进行表征;运用循环伏安法(CV)、计时电流法和线性扫描伏安法(LSV)测试其电化学性能。结果表明:同一煅烧温度下,60次涂刷比30次表现出更加优异的电化学性能。其中60次涂刷,450℃煅烧温度下Ti/SnO_(2)-Sb-Ni-F电极具有更高的析氧电位(2.1 V),更优的电催化活性以及更高的稳定性。在降解实验中,其在20 min内对罗丹明B的降解率为98.8%。因此,该电极在废水处理领域具有较好的应用前景。 展开更多
关键词 电催化氧化 涂刷 Ti/SnO_(2)-Sb电极 掺杂
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Catalytic combustion of diesel soot over K_2NiF_4-type oxides La_(2-x)K_xCuO_4 被引量:6
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作者 朱玲 王学中 梁存珍 《Journal of Rare Earths》 SCIE EI CAS CSCD 2008年第2期254-257,共4页
Nanostructure K2NiF4 type oxides La2-xKxCuO4 complex oxides were prepared using the Sol-Gel method, characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), and Scanning Electron Microscopy (... Nanostructure K2NiF4 type oxides La2-xKxCuO4 complex oxides were prepared using the Sol-Gel method, characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), and Scanning Electron Microscopy (SEM). The catalytic activity for soot combustion was evaluated by the Temperature-Programmed Reaction (TPO) technique. The results demonstrated that the substitution quality of K^+ for La^3+ at the A-site would increase the catalytic activities of La2-xKxCuO4 for soot combustion greatly; the substitution quality affected the structure and catalytic activity obviously. The La1.8K0.2CuO4 complex oxides with tetrahedral structures had the best catalytic activity for soot combustion, and the ignition temperature of soot combustion was lowered from 490 to 320 ℃. 展开更多
关键词 K2NiF4-type complex oxides SOOT catalytic combustion rare earths
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Catalytic Combustion of Diesel Soot over K_2NiF_4-type Oxides La_(2-x)K_xCuO_4 被引量:2
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作者 Zhu Ling Wang Xuezhong Liang Cunzhen 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第5期528-528,共1页
The K2NiF4 type oxides, La2-x KxCuO4 complex oxides with nanometric size were prepared by sol-gel method. The characters of these samples were analyzed by H2-TPR, XRD, FT-IR and SEM. The catalytic activity for soot co... The K2NiF4 type oxides, La2-x KxCuO4 complex oxides with nanometric size were prepared by sol-gel method. The characters of these samples were analyzed by H2-TPR, XRD, FT-IR and SEM. The catalytic activity for soot combustion was evaluated by temperature-programmed reaction (TPO) technique. The results demonstrate that the substitution of K^+ for La^3+ at A-site will increase the catalytic activities of La2-xKxCuO4 to soot combustion greatly, and the substitution quantity affects the structure and catalytic activity obviously. The La1.8 K0.2 CuO4 complex oxides with tetrahedral structure has the best catalytic activity for soot removal reaction, the ignition temperature of soot combustion is decreased from 490 to 320℃. 展开更多
关键词 K2NiF4-type complex oxides SOOT catalytic combustion rare earths
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OXIDATION OF ALKYLBENZENES CATALYZED BY IRON( Ⅱ,Ⅲ)-1,10-PHENANTHROLINE AND 2, 2'-BIPYRIDINE COMPLEXES 被引量:1
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作者 Zi Qiang LEI Yun Pu WANG 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第1期21-22,共2页
Oxidation of alkybenzenes PhCH_2R(R=H, CH_3, C_2H_5 and n-C_3H_7) under 1 atm. of O_2 or air catalyzed by iron(Ⅱ, Ⅲ)-2,2'-bipyridine and 1,10-phenanthroline complexes, affords the aryl-substituted ketones and al... Oxidation of alkybenzenes PhCH_2R(R=H, CH_3, C_2H_5 and n-C_3H_7) under 1 atm. of O_2 or air catalyzed by iron(Ⅱ, Ⅲ)-2,2'-bipyridine and 1,10-phenanthroline complexes, affords the aryl-substituted ketones and alcohols with the conversion of 15.00%~34.58% containing of 97.60%~99.80% ketones and alcohols. The turnover numbers of these catalysts are over 3500 mol-cat. ^(-1)for 3.5 h. 展开更多
关键词 PHENANTHROLINE AND 2 BIPYRIDINE COMPLEXES OXIDATION OF ALKYLBENZENES CATALYZED BY IRON
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内氧化粉体制备的Ag-SnO_(2)接点材料的显微结构 被引量:5
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作者 邓忠民 吕贤勇 +3 位作者 郑福前 谢明 刘建良 施安 《贵金属》 CAS CSCD 北大核心 2000年第4期12-15,共4页
Ag -Sn -M(M =Bi、Cu)合金粉末内氧化后经压制、烧结、挤压、加工制备成Ag-SnO2 接点材料。用光学显微镜 ,X射线衍射和SEM研究其显微结构。结果表明 :在Ag-SnO2 材料中存在Ag、SnO2 、Bi2 SnO7和CuO ,氧化物以极细小的颗粒分布在银基体中。
关键词 内氧化 Ag-SnO_(2) 显微结构
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Ti/SnO_(2)涂层电极的制备研究进展
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作者 赵瑞玉 王艺谋 +5 位作者 赵会吉 李忠涛 高志一 张倩 兰学芳 刘晨光 《应用化工》 CAS CSCD 北大核心 2022年第8期2348-2354,共7页
综述了Ti/SnO_(2)涂层电极的制备研究进展。介绍了电化学氧化水处理的优点与具有应用前景的Ti/SnO_(2)涂层电极的研究进展。简述了钛基金属氧化物涂层电极降解有机物的原理;综述了近年来国内外对于Ti/SnO_(2)电极的制备研究进展,主要从... 综述了Ti/SnO_(2)涂层电极的制备研究进展。介绍了电化学氧化水处理的优点与具有应用前景的Ti/SnO_(2)涂层电极的研究进展。简述了钛基金属氧化物涂层电极降解有机物的原理;综述了近年来国内外对于Ti/SnO_(2)电极的制备研究进展,主要从元素掺杂、固体颗粒掺杂、中间层与基底改性、制备方法创新等方面进行了详细介绍;给出了今后Ti/SnO_(2)电极的研究方向。 展开更多
关键词 电化学氧化 Ti/SnO_(2)电极 形稳电极制备 原理 改性
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改性SnO_(2)电极电催化降解煤化工废水 被引量:2
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作者 段东洋 伏吉帅 +2 位作者 杨蕊蕊 杜海燕 王忠德 《水处理技术》 CAS CSCD 北大核心 2021年第10期94-98,共5页
针对煤化工废水生化处理后无法达到污水排放和回用标准等问题,研究采用电催化氧化法降解废水中氨氮和COD来实现废水的零排放。比较了改性SnO_(2)电极(ESIX-SnO_(2))与Ti/SnO_(2)电极电化学性能,并考察电流密度、初始pH、初始Cl-质量浓... 针对煤化工废水生化处理后无法达到污水排放和回用标准等问题,研究采用电催化氧化法降解废水中氨氮和COD来实现废水的零排放。比较了改性SnO_(2)电极(ESIX-SnO_(2))与Ti/SnO_(2)电极电化学性能,并考察电流密度、初始pH、初始Cl-质量浓度对电催化降解废水中氨氮和COD的影响。结果表明,与传统的Ti/SnO_(2)电极相比,ESIXSnO_(2)电极晶粒尺寸变小、析氧电位(1.67 V)和加速寿命(112 h)显著提高。在优化工艺条件下,电解30 min后,ESIXSnO_(2)电极对NH_(4)^(+)-N和COD的去除率分别为100%和90%。在实际催化氧化过程中,ESIX-SnO_(2)电极表面产生更多具有强氧化性的羟基自由基,能够快速氧化氨氮和有机物,实现了污染物的快速无害化去除。 展开更多
关键词 SnO_(2)电极 煤化工废水 氨氮 COD 电氧化
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4-硝基氮氧化吡啶-2-甲酸构筑的镧、镨配合物的合成、晶体结构及荧光性质 被引量:2
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作者 黄妙龄 陈亮莹 +2 位作者 赵俞秉 谭欣宇 叶梦月 《人工晶体学报》 CAS 北大核心 2023年第1期125-131,共7页
选择刚性有机化合物4-硝基氮氧化吡啶-2-甲酸(POA)作为配体,与稀土金属La(III)、Pr(III)反应,合成了2个一维配位聚合物。X射线单晶衍射结果表明:配合物1的分子式为{[La(POA)_(3)H_(2)O]·CH_(3)OH}n,属于单斜晶系,空间群是P2_(1)/c... 选择刚性有机化合物4-硝基氮氧化吡啶-2-甲酸(POA)作为配体,与稀土金属La(III)、Pr(III)反应,合成了2个一维配位聚合物。X射线单晶衍射结果表明:配合物1的分子式为{[La(POA)_(3)H_(2)O]·CH_(3)OH}n,属于单斜晶系,空间群是P2_(1)/c。该晶胞参数分别为a=1.7568 nm,b=0.6636 nm,c=2.0486 nm,α=90°,β=96.96°,γ=90°,V=2.3707 nm^(3),M_(r)=738.28。配合物2的分子式为{[Pr(POA)_(3)H_(2)O]·H_(2)O}n,属于单斜晶系,空间群是P2_(1)/c。该晶胞参数分别为a=1.7578 nm,b=0.6569 nm,c=2.0467 nm,α=90°,β=97.20°,γ=90°,V=2.3448 nm^(3),M_(r)=726.25。两个配合物的配位单元组成和结构相似,中心离子都处于稍变形的三帽三棱柱的配位环境中。通过红外光谱、紫外光谱、热重分析仪和荧光光谱仪对两个配合物的性质进行表征。荧光分析表明,配体和配合物均有较强的荧光性能。 展开更多
关键词 稀土配合物 镧系配合物 镨系配合物 4-硝基氮氧化吡啶-2-甲酸 晶体结构 荧光性质
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EFFECT OF SnO_2 ADDITION ON THE SERVICE LIFE AND ELECTROCHEMICAL PROPERTIES OF Ti/IrO_2,+Ta_2O_5 ANODES IN PHENOLSULFONIC ACID SOLUTION 被引量:3
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作者 J.M. Hu H.M. Meng +2 位作者 D.B. Sun S.J. Zhang J.X. Wu and D.J. Yang Beijing Corrosion and Protection Center, Open Laboratory of Corrosion, Erosion and Surface Technology, University of Science and Technology Beijing, Beijing 100083, China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第4期937-943,共7页
Service life of two different oxide anodes in phenolsulfonic acid (PSA) solution was investigated by accelerated electrolysis. The durability of Ti/IrO_2+Ta_2 O_5 anode increased by the addition of SnO_2 in the mixed... Service life of two different oxide anodes in phenolsulfonic acid (PSA) solution was investigated by accelerated electrolysis. The durability of Ti/IrO_2+Ta_2 O_5 anode increased by the addition of SnO_2 in the mixed oxides. The degradation mechanisms of Ti/IrO_2+ Ta_2 O_5 and Ti/IrO_2 +Ta_2 O_5 +SnO+2 anodes were different. It was shown from the observation of scanning electron microscopy (SEM) and the electrochcmical measurement that, the deactivation of Ti/IrO_2 + Ta_2 O_5 anode was due to the build-up of an organic film on surface. The growth of the covered film on surface was restricted by addition of SnO_2, which resulted in increasing of the service life of anodes. The over-potential for oxygen evolution on Ti/IrO_2 +Ta_2 O_5 electrode increased after doping SnO_2, and the intermediate products of PSA building-up on the surface was much more rapidly oxidized. Meanwhile, a certain part of the surface oxide deposit entered into the solution leading to loss of oxides, which resulted in degradation of Ti/IroO_2 + Ta_2 O_5 anode containing SnO_2 component. 展开更多
关键词 metal oxide anode IrO_2 + Ta_2 O_5 IrO_2 + Ta_2 O_5 +SnO_2 phenolsulfonic acid degradation
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紫杉醇-比伐卢定球囊涂层复合物调控NF-κB与Nrf2/ARE通路抗HCASMC增殖迁移的机制研究
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作者 李红梅 李海燕 《中国循证心血管医学杂志》 2023年第8期936-940,945,共6页
目的 基于人冠状动脉平滑肌细胞(HCASMC)核因子κB(NF-κB)与重组合成蛋白2/抗氧化反应元件(Nrf2/ARE)双通路活化模型探索紫杉醇-比伐卢定球囊涂层复合物(LFN)抑制HCASMC增殖迁移抗介入术后再狭窄的微观机理。方法 选用4~6代的HCASMC,... 目的 基于人冠状动脉平滑肌细胞(HCASMC)核因子κB(NF-κB)与重组合成蛋白2/抗氧化反应元件(Nrf2/ARE)双通路活化模型探索紫杉醇-比伐卢定球囊涂层复合物(LFN)抑制HCASMC增殖迁移抗介入术后再狭窄的微观机理。方法 选用4~6代的HCASMC,利用脂多糖(LPS)作为诱导剂,最大化激活NF-κB与Nrf2/ARE双通路,构建LPS诱导HCASMC炎性和氧化应激双通路活化细胞模型。在此基础上,将体外培养的HCASMC分为空白对照组、LPS造模组及LPS造模+LFN复合物干预组,用CCK-8法检测LFN对HCASMC增殖率的影响,同时用免疫荧光法检测增殖细胞核抗原(PCNA)表达量确证细胞增殖状态。进而用Transwell法检测LFN对HCASMC迁移、侵袭能力的影响,并用免疫荧光单染法检测α平滑肌肌动蛋白(α-SMA)、骨桥蛋白(OPN)、NF-κB p65和Nrf2的表达变化,探索LFN对HCASMC表型转化的影响,并探究其对HCASMC中活化的NF-κB与Nrf2/ARE通路关键蛋白的调控作用,继而结合Q-PCR和Western blotting明确LFN干预后双通路关键位点基因和蛋白表达的变化,深入挖掘LFN调控炎性和氧化应激活化的HCASMC增殖迁移的潜在机制。结果 1μmol/L的紫杉醇配比0.2 mg/ml比伐卢定对造模活化后的HCASMC增殖状态具有明显抑制作用,减弱了HCASMC迁移和侵袭能力,并将活化后分泌型的HCASMC转换为收缩型。此外,与LPS造模组相比,LFN通过激活人核因子κB抑制蛋白α(IκBα)表达、阻碍NF-κB活化入核,截断了炎症过程,同时抑制胞质接头蛋白1(Keap-1)表达、促进Nrf2核转位、激活下游醌氧化还原酶1(NQO-1)和人血红素加氧酶1(HO-1)基因和蛋白表达(P<0.05),大幅减缓了胞内氧化应激状态。结论 LFN对NF-κB与Nrf2/ARE双通路活化的HCASMC胞内炎症和氧化应激状态具有显著抑制作用,此抑制作用通过调控NF-κB与Nrf2/ARE通路中核转录因子及其配体表达、影响通路下游效应分子活化而实现,为LFN涂层球囊抗经皮冠状动脉介入治疗(PCI)术后再狭窄的分子机理提供了细胞学依据。 展开更多
关键词 紫杉醇-比伐卢定球囊涂层复合物 人冠状动脉平滑肌细胞 炎症与氧化应激 NF-κB与Nrf2/ARE信号通路 调控机理
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Higher open-circuit voltage set by cobalt redox shuttle in SnO_2 nanofibers-sensitized CdTe quantum dot solar cells 被引量:1
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作者 Gautam E.Unni Soorya Sasi A.Sreekumaran Nair 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第3期481-488,共8页
In this study, we report an efficient CdTe-SnOquantum dot(QD) solar cell fabricated by heat-assisted drop-casting of hydrothermally synthesized CdTe QDs on electrospun SnOnanofibers. The as-prepared QDs and SnOnanof... In this study, we report an efficient CdTe-SnOquantum dot(QD) solar cell fabricated by heat-assisted drop-casting of hydrothermally synthesized CdTe QDs on electrospun SnOnanofibers. The as-prepared QDs and SnOnanofibers were characterized by dynamic light scattering(DLS), UV–Vis spectroscopy,photoluminescence(PL) spectra, X-ray diffraction(XRD) and transmission electron microscopy(TEM). The SnOnanofibers deposited on fluorine-doped tin oxide(SnO) and sensitized with the CdTe QDs were assembled into a solar cell by sandwiching against a platinum(Pt) counter electrode in presence of cobalt electrolyte. The efficiency of cells was investigated by anchoring QDs of varying sizes on SnO. The best photovoltaic performance of an overall power conversion efficiency of 1.10%, an open-circuit voltage(Voc)of 0.80 V, and a photocurrent density(JSC) of 3.70 m A/cmwere obtained for cells with SnOthickness of5–6 μm and cell area of 0.25 cmunder standard 1 Sun illumination(100 m W/cm). The efficiency was investigated for the same systems under polysulfide electrolyte as well for a comparison. 展开更多
关键词 Quantum dot solar cells(QDSCs) Electrospinning Cadmium telluride(CdTe) Tin oxide(SnO_2) NANOFIBERS Cobalt complex redox electrolyte
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Catalytic effects of [Ag(H_2O)(H_3PW_(11)O_(39))]^(3-)on a TiO_2 anode for water oxidation 被引量:1
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作者 Jiansheng Li Lei Wang +3 位作者 Wansheng You Meiying Liu Lancui Zhang Xiaojing Sang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第3期534-541,共8页
A[H3AgI(H2O)PW11O39]3?‐TiO2/ITO electrode was fabricated by immobilizing a molecular polyoxometalate‐based water oxidation catalyst,[H3AgI(H2O)PW11O39]3?(AgPW11),on a TiO2electrode.The resulting electrode was charac... A[H3AgI(H2O)PW11O39]3?‐TiO2/ITO electrode was fabricated by immobilizing a molecular polyoxometalate‐based water oxidation catalyst,[H3AgI(H2O)PW11O39]3?(AgPW11),on a TiO2electrode.The resulting electrode was characterized by X‐ray powder diffraction,scanning electron microscopy,and energy dispersive X‐ray spectroscopy.Linear sweep voltammetry,chronoamperometry,and electrochemical impedance measurements were performed in aqueous Na2SO4solution(0.1molL?1).We found that a higher applied voltage led to better catalytic performance by AgPW11.The AgPW11‐TiO2/ITO electrode gave currents respectively10and2.5times as high as those of the TiO2/ITO and AgNO3‐TiO2/ITO electrodes at an applied voltage of1.5V vs Ag/AgCl.This result was attributed to the lower charge transfer resistance at the electrode‐electrolyte interface for the AgPW11‐TiO2/ITO electrode.Under illumination,the photocurrent was not obviously enhanced although the total anode current increased.The AgPW11‐TiO2/ITO electrode was relatively stable.Cyclic voltammetry of AgPW11was performed in phosphate buffer solution(0.1mol L?1).We found that oxidation of AgPW11was a quasi‐reversible process related to one‐electron and one‐proton transfer.We deduced that disproportionation of the oxidized[H2AgII(H2O)PW11O39]3?might have occurred and the resulting[H3AgIIIOPW11O39]3?oxidized water to O2. 展开更多
关键词 Water oxidation ELECTROCATALYSIS PHOTOELECTROCHEMISTRY TIO2 POLYOXOMETALATE Ag+ complex
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Hydrothermal Synthesis, Crystal Structure and Fluorescent Property of a Cd(Ⅱ) Complex Based on Biimidazole and Isonicotinate-N-oxide 被引量:4
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作者 毛稳玲 胡宗球 丁瑜 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第4期587-591,共5页
A new complex [Cd(H2biim)2(H2O)2]·(ino)2·4H2O (H2biim = 2,2'-biimidazole, ino = isonicotinate-N-oxide) has been prepared and characterized by single-crystal X-ray diffraction analysis, IR and fluore... A new complex [Cd(H2biim)2(H2O)2]·(ino)2·4H2O (H2biim = 2,2'-biimidazole, ino = isonicotinate-N-oxide) has been prepared and characterized by single-crystal X-ray diffraction analysis, IR and fluorescence spectra analysis. The crystal is of triclinic system, space group P1 with a = 7.5380(6), b = 8.0402(7), c = 13.5094(11) , α = 104.269(1), β = 93.604(1), γ = 98.349(1)°, V = 780.93(11) 3, Mr = 765.00, Dc = 1.627 g/cm3, F(000) = 390, μ = 0.776 mm-1 and Z = 1. The final R = 0.0322 and wR = 0.0825 for 7038 observed reflections with I 2σ(I) and R = 0.0341 and wR = 0.0832 for all data. The title complex exhibits an infinite chain-like structure through bridging isonicotinate-N-oxide. Strong interchain hydrogen bonds between isonicotinate-N-oxide and H2biim result in the robust 3-D supramolecular architecture. Moreover, the complex shows strong photoluminescence with emission maximum at λ = 401 nm upon λex = 330 nm. 展开更多
关键词 cadmium(Ⅱ) complex crystal structure 2 2-biimidazole isonicotinc acid N-oxide hydrothermal synthesis fluorescent property
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