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Influence of nano-CeO_2 on coating structure and properties of electrodeposited Al/α-PbO_2/β-PbO_2 认领 引用 被引量：9
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作者 陈阵 余强 +2 位作者 廖登辉 郭忠诚 武剑 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第5期1382-1389,共8页
Al/α-PbO2/β-PbO2 composite electrodes doped with rare earth oxide （CeO2） were prepared by anodic oxidation method investigate the influence of nano-CeO2 dopants on the properties of Al/α-PbO2/β-PbO2-CeO2 electro... Al/α-PbO2/β-PbO2 composite electrodes doped with rare earth oxide （CeO2） were prepared by anodic oxidation method investigate the influence of nano-CeO2 dopants on the properties of Al/α-PbO2/β-PbO2-CeO2 electrodes and the impact of α-PbO2 as the intermediate layer. The results show that using α-PbO2 as the intermediate layer will benefit the crystallization of β-PbO2 and β-PbO2 is more suitable as the surface layer than α-PbO2. CeO2 dopants change the crystallite size and crystal structure, enhance the catalytic activity, and even change the deposition mechanism of PbO2. The doping of CeO2 in the PbO2 electrodes can enhance the electro-catalytic activity, which is helpful for oxygen evolution, and therefore reduce the cell voltage. 展开更多
关键词 rare earth CeO2 composite electrode material α-PbO2 β-PbO2 cell voltage inert anode
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Effects of current density on preparation and performance of Al/conductive coating/α-PbO_2-Ce O_2-TiO_2/β-Pb O_2-MnO_2-WC-ZrO_2 composite electrode materials 认领 引用 被引量：6
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作者 杨海涛 陈步明 +5 位作者 郭忠诚 刘焕荣 张永春 黄惠 徐瑞东 付仁春 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第10期3394-3404,共11页
Al/conductive coating/α-Pb O2-Ce O2-Ti O2/β-PbO 2-MnO 2-WC-Zr O2 composite electrode material was prepared on Al/conductive coating/α-PbO 2-Ce O2-Ti O2 substrate by electrochemical oxidation co-deposition technique... Al/conductive coating/α-Pb O2-Ce O2-Ti O2/β-PbO 2-MnO 2-WC-Zr O2 composite electrode material was prepared on Al/conductive coating/α-PbO 2-Ce O2-Ti O2 substrate by electrochemical oxidation co-deposition technique. The effects of current density on the chemical composition, electrocatalytic activity, and stability of the composite anode material were investigated by energy dispersive X-ray spectroscopy（EDXS）, anode polarization curves, quasi-stationary polarization（Tafel） curves, electrochemical impedance spectroscopy（EIS）, scanning electron microscopy（SEM）, and X-ray diffraction（XRD）. Results reveal that the composite electrode obtained at 1 A/dm2 possesses the lowest overpotential（0.610 V at 500 A/m2） for oxygen evolution, the best electrocatalytic activity, the longest service life（360 h at 40 °C in 150 g/L H2SO4 solution under 2 A/cm2）, and the lowest cell voltage（2.75 V at 500 A/m2）. Furthermore, with increasing current density, the coating exhibits grain growth and the decrease of content of Mn O2. Only a slight effect on crystalline structure is observed. 展开更多
关键词 composite electrode material A1 substrate β-PbO2-MnO2-WC-ZrO2 electrochemical co-deposition current density
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Photoelectrochemical degradation of Methylene Blue with β-PbO_2 electrodes driven by visible light irradiation 认领 引用 被引量：4
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作者 Guoting Li HoYin Yip +3 位作者 Kin Hang Wong Chun Hu Jiuhui Qu Po Keung Wong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2011年第6期998-1003,共6页
β-PbO2 electrodes were prepared by electro-deposition and characterized by scanning electron microscopy,X-ray diffraction,X-ray photoelectron spectroscopy,and linear sweep voltammetry.We confirmed pure β-PbO2 crysta... β-PbO2 electrodes were prepared by electro-deposition and characterized by scanning electron microscopy,X-ray diffraction,X-ray photoelectron spectroscopy,and linear sweep voltammetry.We confirmed pure β-PbO2 crystals were on the electrode and it had a high oxygen evolution potential.The photoactivity and photoelectrochemical（PEC） properties of the β-PbO2 electrode were investigated under visible light irradiation（λ 〉 420 nm） for the decolorization of Methylene Blue.Pseudo first-order kinetics parameter（Kapp） for dye decolorization using the β-PbO2 electrode achieved 6.71×10-4 min-1 under visible light irradiation,which indicated its excellent visible light-induced photoactivity.The Kapp of the PEC process was as much as 1.41×10-3 min-1 and was 1.71 times that of visible light irradiation or electrolysis even in the presence of the β-PbO2 electrode.A significant synergetic effect was observed in the PEC system.We also employed TiO2 modified β-PbO2 electrodes in this test,which revealed that the TiO2 immobilized on the β-PbO2 electrode inhibited the visible light-induced PEC efficiency despite the amount of TiO2 used for electrode preparation.The β-PbO2 electrode was also superior to the dimensionally stable anode（Ti/Ru0.3Ti0.7O2） in visible light-induced photoactivity and PEC efficiency. 展开更多
关键词 photocatalysis photoelectrochemical process visible light β-PbO2 electrode
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Preparation of the Ag_2O_2-PbO_2 Modified Electrode and Its Application towards Escherichia coli Fast Counting in Water 认领 引用 被引量：4
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作者 JingGU WenZHANG +3 位作者 YuFengYANG LeiZHENG ZiRongWU LiTongJIN 《Chinese Chemical Letters》 SCIE CAS 2005年第5期635-638,共4页
A novel nano crystalline Ag2O2-PbO2 film chemically modified electrode (CME) was prepared and the CME was characterized by X-ray diffractometer (XRD) and atomic force microscope (AFM). By chronoamperometry, the nano A... A novel nano crystalline Ag2O2-PbO2 film chemically modified electrode (CME) was prepared and the CME was characterized by X-ray diffractometer (XRD) and atomic force microscope (AFM). By chronoamperometry, the nano Ag2O2-PbO2 CME was used as bioelectro- chemical sensor to determine the population of Escherichia coli (E. coli) in water. Compared with conventional methods, it is found that the technique we used is fast and convenient in counting E. coli. 展开更多
关键词 Ag2O2-PbO2 modified platinum electrode Escherichia coli fast counting.
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Ti/Ag-PbO2/Co电极的制备及其电催化苯酚降解性能研究 认领 引用
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作者 王建彬 卫新来 王磊 《现代化工》 CAS CSCD 北大核心 2025年第9期106-112,共7页
为获得较高的催化效果,通过在钛网上镀银并在PbO2活性层中掺杂Co元素制备出Ti/Ag-PbO2/Co电极。首先对电极进行表征分析和电化学性能测试,随后对比了不同电极在苯酚去除中的效果。结果表明,镀银处理可以增加PbO2晶体的结晶度... 为获得较高的催化效果,通过在钛网上镀银并在PbO2活性层中掺杂Co元素制备出Ti/Ag-PbO2/Co电极。首先对电极进行表征分析和电化学性能测试,随后对比了不同电极在苯酚去除中的效果。结果表明,镀银处理可以增加PbO2晶体的结晶度和含量,Co掺杂处理可以使PbO2晶体尺寸变小,这些均有利于增强电极的催化活性和使用寿命。当两者共同作用时,电极的电子转移阻力明显减小,电化学性能更强。将其应用于电催化苯酚性能研究,确定了Ti/Ag-PbO2/Co电极在氯化钠添加量2 g/L、电流密度10 mA/cm2、搅拌速度120 r/min下对260 mL初始浓度为100 mg/L的苯酚模拟废水进行催化降解,效果最佳,反应30 min时苯酚去除率为99.8%,能耗仅为1.0 kWh/m3。该电极进行10次重复试验后对苯酚去除率没有明显降低,表明电极具有较高的稳定性。 展开更多
关键词 电催化氧化 Ti/PbO2电极 苯酚 废水降解
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退火法制备TiO2/Ti电极及其对有机含铀废水的电化学净化 认领 引用
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作者 彭超 李天宇 +4 位作者 吕慧涛 陈佳琪 颜永得 薛云 田国新 《原子能科学技术》 EI CAS CSCD 北大核心 2026年第1期148-157,共10页
高温气冷堆燃料元件生产过程中会产生相当量的偏碱性含铀废水,其中还含有一定浓度的尿素、聚乙烯醇、四氢糠醇等有机物。为实现有机含铀废水的净化,本研究针对这种废水开展铀去除研究。首先通过对Ti片进行680℃退火处理,制备了TiO2/T... 高温气冷堆燃料元件生产过程中会产生相当量的偏碱性含铀废水,其中还含有一定浓度的尿素、聚乙烯醇、四氢糠醇等有机物。为实现有机含铀废水的净化,本研究针对这种废水开展铀去除研究。首先通过对Ti片进行680℃退火处理,制备了TiO2/Ti电极,然后配制有机含铀模拟溶液,采用电化学法开展模拟溶液中铀的去除研究,探索了碳酸根浓度、pH、铀初始浓度、时间、电压等因素对铀去除率的影响,并推测了过程的反应机理。X射线光电子谱(XPS)、扫描电子显微镜(SEM)、电子能谱(EDS)和X射线衍射(XRD)分析表明,通过退火处理合成的TiO2/Ti电极表面被颗粒状金红石相TiO2覆盖,说明通过退火法能成功制备TiO2/Ti电极。电化学法去除模拟溶液(pH=9)中铀的最优条件为:碳酸钠浓度0.01 mol/L、电压10 V、时间5 h,此条件下铀去除率达95.43%。0.01 mol/L碳酸钠溶液中,铀的还原电位为-0.99 V(vs SCE),其还原过程为一步单电子过程,U(Ⅵ)得到1个电子还原为U(Ⅴ),再歧化为U(Ⅳ)和U(Ⅵ),铀是以UO2和U2O5的形态沉积在电极表面。在4种共存物中,硝酸铵、尿素和聚乙烯醇对铀去除有明显的抑制,而四氢糠醇则没有明显影响。它们共同存在时,在10 V条件下,铀去除率下降至36.75%,但通过提升电压至15 V,铀去除率上升至85.99%。本文所制备TiO2/Ti电极的重复利用性良好,重复使用8次后,铀去除率仍能达到90%以上,每次重复使用,铀的回收率基本能达90%以上。 展开更多
关键词 含铀废水 电化学 TiO2/Ti电极 有机物
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改性Ti/PbO2电极研究进展 认领 引用
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作者 尔古阿沙 高官金 +1 位作者 刘强兵 蒋新宇 《科技导报》 CAS CSCD 北大核心 2026年第5期103-111,共9页
Ti/PbO2电极具有低成本、耐腐蚀性强等优势,广泛用于有机化合物的电催化氧化领域。然而,传统的Ti/PbO2电极在实际应用中存在电流效率低、活性层比表面积小、电催化性能弱、使用寿命短等问题。从Ti/PbO2电极发展的角度,介绍了... Ti/PbO2电极具有低成本、耐腐蚀性强等优势,广泛用于有机化合物的电催化氧化领域。然而,传统的Ti/PbO2电极在实际应用中存在电流效率低、活性层比表面积小、电催化性能弱、使用寿命短等问题。从Ti/PbO2电极发展的角度,介绍了近年来在Ti基体表面刻蚀改性和形状调节、中间层改性、表面PbO2活性层构建及掺杂改性3个方面的重要研究成果,分别聚焦基体改性增强界面结合、引入新型中间层提升导电与稳定性以及活性层掺杂改性优化催化性能。在系统梳理这些成果的基础上,从电极结构稳定性与催化活性协同增强的角度,归纳并提出了提升Ti/PbO2电极综合电化学性能:一是优化基体刻蚀参数与形状设计,构建粗糙且均匀的表面结构,强化基体与中间层的结合强度;二是筛选适配性优良的中间层材料,抑制界面反应与氧化膜生成,提升电荷传输效率;三是精准调控活性层晶型结构,合理掺杂金属或非金属元素,实现催化活性与稳定性的同步提升。最后,对Ti/PbO2电极的发展趋势进行了展望,预计未来将在电极材料改性、结构优化等方面取得关键突破,以进一步提升其电化学性能与稳定性,同时拓展其在复杂体系中的规模化应用范围,加速其工业化进程。 展开更多
关键词 Ti/PbO2电极 电催化氧化 掺杂改性 钛阳极
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水热法制备Nd掺杂Ti/SnO2-Sb电极参数优化研究 认领 引用
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作者 张忱 李阳 《广州化工》 CAS 2026年第15期56-60,共5页
Ti/SnO2-Sb电极具有高催化活性和低成本的优势,其使用寿命偏短的劣势可以通过向活性涂层中掺杂Nd得到解决,但活性涂层中金属盐配比和反应条件的差异均会导致制备电极性能发生明显改变,需要进一步探究。采用水热法制备Ti/SnO2-SbN... Ti/SnO2-Sb电极具有高催化活性和低成本的优势,其使用寿命偏短的劣势可以通过向活性涂层中掺杂Nd得到解决,但活性涂层中金属盐配比和反应条件的差异均会导致制备电极性能发生明显改变,需要进一步探究。采用水热法制备Ti/SnO2-SbNd电极,以电催化降解硝基苯(NB)过程中NB去除率和槽电压增幅(或加速寿命)为参考指标,优化电极制备参数。结果表明,当Sn4+浓度为0.10 mol/L,水热反应温度、时间分别为180℃和16 h,退火时间为2.0 h时,Ti/SnO2-Sb电极综合性能最佳,NB去除率和槽电压增幅分别为94.1%和0.3 V;进一步掺杂2%Nd(相对Sn4+摩尔比),制备出催化活性和稳定性更高的Ti/SnO2-Sb-Nd纳米球状电极,其析氧电位、加速寿命分别为2.24 V和28 min,催化降解NB去除率为96.7%。 展开更多
关键词 Ti/SnO2-Sb电极 Nd掺杂 水热法 催化活性 稳定性
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β-PbO_2电极中加入纳米级TiO_2的性能研究 认领 引用 被引量：19
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作者 蔡天晓 鞠鹤 +2 位作者 武宏让 康新婷 张玉萍 《稀有金属材料与工程》 SCIE EI CAS 北大核心 2003年第7期558-560,共3页
通过对传统电沉积β-PbO2工艺技术的改进(在镀液中加入纳米级TiO2),使镀层β-PbO2的脆性大大降低,从而使其可在温度为90℃的H2SO4介质中使用,镀层不会从基材剥落,而是自然损耗。
关键词 β-PbO2电极 电催化 TiO2 纳米
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Enhancing Capacitance Performance of Ti3C2Tx MXene as Electrode Materials of Supercapacitor: From Controlled Preparation to Composite Structure Construction 认领 引用 被引量：23
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作者 Xiaobei Zang Jiali Wang +5 位作者 Yijiang Qin Teng Wang Chengpeng He Qingguo Shao Hongwei Zhu Ning Cao 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第6期152-175,共24页
Ti3C2Tx,a novel two-dimensional layer material,is widely used as electrode materials of supercapacitor due to its good metal conductivity,redox reaction active surface,and so on.However,there are many challenges to be... Ti3C2Tx,a novel two-dimensional layer material,is widely used as electrode materials of supercapacitor due to its good metal conductivity,redox reaction active surface,and so on.However,there are many challenges to be addressed which impede Ti3C2Tx obtaining the ideal specific capacitance,such as restacking,re-crushing,and oxidation of titanium.Recently,many advances have been proposed to enhance capacitance performance of Ti3C2Tx.In this review,recent strategies for improving specific capacitance are summarized and compared,for example,film formation,surface modification,and composite method.Furthermore,in order to comprehend the mechanism of those efforts,this review analyzes the energy storage performance in different electrolytes and influencing factors.This review is expected to predict redouble research direction of Ti3C2Tx materials in supercapacitors. 展开更多
关键词 Ti3C2Tx MXene Capacitance performance Storage mechanism Electrode materials Supercapacitor
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Ti/α-PbO_2/β-PbO_2电极电催化氧化处理苯酚废水 认领 引用 被引量：13
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作者 王鸿辉 杨卫华 +1 位作者 黄龙 黄婷婷 《华侨大学学报（自然科学版）》 CAS 北大核心 2008年第2期263-266,共4页
采用电催化氧化法,以自制Ti/α-PbO2/β-PbO2电极为阳极,在室温条件下对苯酚模拟废水进行降解研究,探讨电流密度、电极间距、pH值及苯酚初始质量浓度对苯酚降解效率的影响规律.结果表明,在电流密度为600 A.m-2,电极间距为1.0 cm,pH值为3... 采用电催化氧化法,以自制Ti/α-PbO2/β-PbO2电极为阳极,在室温条件下对苯酚模拟废水进行降解研究,探讨电流密度、电极间距、pH值及苯酚初始质量浓度对苯酚降解效率的影响规律.结果表明,在电流密度为600 A.m-2,电极间距为1.0 cm,pH值为3,苯酚初始质量浓度为100 mg.L-1的条件下,苯酚降解效率达92%以上.紫外光谱等实验结果表明,苯酚在氧化降解过程中会产生苯醌等中间产物,苯酚及其中间产物最终被矿化为CO2和H2O. 展开更多
关键词 电催化氧化 Ti/α-PbO2/β-PbO2电极 苯酚 降解
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Ti/SnO_2+Sb_2O_3/β-PbO_2阳极电化学氧化异噻唑啉酮 认领 引用 被引量：8
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作者 韩卫清 周刚 +2 位作者 王连军 孙秀云 李健生 《过程工程学报》 EI CAS 北大核心 2006年第4期566-570,共5页
采用提拉法和电沉积法制作Ti/SnO2+Sb2O3/β-PbO2阳极,通过SEM扫描、XRD分析和极化曲线测定表征具有良好结构和催化性能.利用该电极氧化异噻唑啉酮水溶液,研究运行参数(电化学氧化时间、电流密度和水溶液pH值)的变化对异噻唑啉酮和化学... 采用提拉法和电沉积法制作Ti/SnO2+Sb2O3/β-PbO2阳极,通过SEM扫描、XRD分析和极化曲线测定表征具有良好结构和催化性能.利用该电极氧化异噻唑啉酮水溶液,研究运行参数(电化学氧化时间、电流密度和水溶液pH值)的变化对异噻唑啉酮和化学耗氧量(ChemicalOxygenDemand,CODcr)降解效果的影响,降解过程符合一级动力学方程.在异噻唑啉酮水溶液初始浓度200mg/L、电流密度15mA/cm2、电化学氧化180min时,异噻唑啉酮、CODcr去除率可分别达到98%和43%.通过紫外光谱图分析了异噻唑啉酮氧化过程为先开环,再生成低分子有机酸,最后矿化为CO2和H2O. 展开更多
关键词 异噻唑啉酮 电化学氧化 钛基β-氧化铅阳极(Ti/SnO2+Sb2O3/β-PbO2) 化学耗氧量
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Effect of Sb dopant amount on the structure and electrocatalytic capability of Ti/Sb-SnO_2 electrodes in the oxidation of 4-chlorophenol 认领 引用 被引量：24
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作者 KONG Jiang-tao SHI Shao-yuan +1 位作者 ZHU Xiu-ping NI Jin-ren 《Journal of Environmental Sciences》 SCIE EI CAS 2007年第11期1380-1386,共7页
Ti/Sb-SnO2 anodes were prepared by thermal decomposition to examine the influence of the amount of Sb dopant on the structure and electrocatalytic capability of the electrodes in the oxidation of 4-chlorophenol. The p... Ti/Sb-SnO2 anodes were prepared by thermal decomposition to examine the influence of the amount of Sb dopant on the structure and electrocatalytic capability of the electrodes in the oxidation of 4-chlorophenol. The physicochemical properties of the Sb-SnO2 coating were markedly influenced by different amounts of Sb dopant. The electrodes, which contained 5% Sb dopant in the coating, presented a much more homogenous surface and much smaller mud-cracks, compared with Ti/Sb-SnO2 electrodes containing 10% or 15% Sb dopant, which exibited larger mud cracks and pores on the surface. However, the main microstructure remained unchanged with the addition of the Sb dopant. No new crystal phase was observed by X-ray diffraction （XRD）. The electrochemical oxidation of 4-chlorophenol on the Ti/SnO2 electrode with 5% Sb dopant was inclined to electrochemical combustion; while for those containing more Sb dopant, intermediate species were accumulated. The electrodes with 5% Sb dopant showed the highest efficiency in the bulk electrolysis of 4-chlorophenol at a current density of 20 mA/cm^2 for 180 min; and the removal rates of 4-chlorophenol and COD were 51.0% and 48.9%, respectively. 展开更多
关键词 4-chlorophenol cyclic voltammogram electrochemical oxidation Sb dopant Ti/Sb-SnO2 electrode
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A high activity of Ti/SnO_2-Sb electrode in the electrochemicaldegradation of 2,4-dichlorophenol in aqueous solution 认领 引用 被引量：5
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作者 Junfeng Niu Dusmant Maharana +2 位作者 Jiale Xu Zhen Chai Yueping Bao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2013年第7期1424-1430,共7页
Electrochemicaldegradation of2,4-dichlorophenol （2,4-DCP） in aqueous solutionwas investigated over Ti/SnO2-Sb anode. The factors influencing thedegradation rate, such as applied currentdensity （2-40 mA/cm2 ）, pH ... Electrochemicaldegradation of2,4-dichlorophenol （2,4-DCP） in aqueous solutionwas investigated over Ti/SnO2-Sb anode. The factors influencing thedegradation rate, such as applied currentdensity （2-40 mA/cm2 ）, pH （3-11） and initial concentration （5-200 mg/L）were evaluated. Thedegradation of2,4-DCP followed apparent pseudo first-order kinetics. Thedegradation ratio on Ti/SnO2 -Sb anode attained 〉 99.9% after 20 min of electrolysis at initial 5-200 mg/L concentrations at a constant currentdensity of 30 mA/cm2 with a 10 mmol/L sodium sulphate （Na2SO4 ） supporting electrolyte solution. The results showed that 2,4-DCP （100 mg/L）degradation and total organic carbon （TOC） removal ratio achieved 99.9% and 92.8%, respectively, at the optimal conditions after 30 min electrolysis. Under this condition, thedegradation rate constant （k） and thedegradation half-life （t1/2 ）were 0.21 min1 and （2.8 ± 0.2） min, respectively. Mainly carboxylic acids （propanoic acid, maleic acid, propanedioic acid, acetic acid and oxalic acid） weredetected as intermediates. The energy efficiencies for2,4-DCPdegradation （5-200 mg/L）with Ti/SnO2-Sb anode ranged from 0.672 to 1.602 g/kWh. The Ti/SnO2-Sb anodewith a high activity to rapid organic oxidation could be employed todegrade chlorophenols, particularly2,4-DCP inwastewater. 展开更多
关键词 2 4-dichlorphenol Ti/SnO2 -Sb electrode electrochemicaldegradation total organic carbon
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Preparation and application of pharmaceutical wastewater treatment by praseodymium doped SnO_2/Ti electrocatalytic electrode 认领 引用 被引量：16
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作者 韩国成 刘峥 王永燎 《Journal of Rare Earths》 SCIE EI CAS 2008年第4期532-537,共6页
Praseodymium was selected as a promoter for SnO2/Ti electrode to improve the electrocatalytic performance by electrodeposition in pharmaceutical wastewater treatment; the micrograph and the structure were characterize... Praseodymium was selected as a promoter for SnO2/Ti electrode to improve the electrocatalytic performance by electrodeposition in pharmaceutical wastewater treatment; the micrograph and the structure were characterized by SEM and XRD. Mixture uniform design was used in the optimization of the electrolytic conditions; mathematical model was established according to the rate of wiping COD off, which revealed the relationship between the current intensity, time of electrolysis, the amount of doped Pr, and the ratio of area （SnOJTi：Al）. On the basis of the analysis of the empirical model, the optimized parameters had been obtained; the rate of wiping COD off was up to 94.9%, it decreased from 392 to 20 mg/L. Experimental results showed that the electrocatalytic performance of the electrode doped with Pr was superior for the treatment of pharmaceutical wastewater. 展开更多
关键词 SnO2/Ti electrode electrocatalytic mixture uniform design pharmaceutical wastewater rare earths
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Electrochemical oxidation of aniline by a novel Ti/TiOxHy/Sb-SnO2electrode 认领 引用 被引量：10
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作者 Xiaoliang Li Hao Xu Wei Yan 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第11期1860-1870,共11页
Electrochemical oxidation of aniline in aqueous solution was investigated over a novel Ti/TiOxHy/Sb-SnO2 electrode prepared by the electrodeposition method.Scanning electron microscopy,X-ray diffraction,and electroche... Electrochemical oxidation of aniline in aqueous solution was investigated over a novel Ti/TiOxHy/Sb-SnO2 electrode prepared by the electrodeposition method.Scanning electron microscopy,X-ray diffraction,and electrochemical measurements were used to characterize its morphology,crystal structure,and electrochemical properties.Removal of aniline by the Ti/TiOxHy/Sb-SnO2electrode was investigated by ultraviolet-Visible spectroscopy and chemical oxygen demand(COD)analysis under different conditions,including current densities,initial concentrations of aniline,pH values,concentrations of chloride ions,and types of reactor.It was found that a higher current density,a lower initial concentration of aniline,an acidic solution,the presence of chloride ions(0.2wt%NaCl),and a three-dimensional(3D)reactor promoted the removal efficiency of aniline.Electrochemical degradation of aniline followed pseudo-first-order kinetics.The aniline(200 mL of 100mg·L-(-1))and COD removal efficiencies reached 100%and 73.5%,respectively,at a current density of 20 mA·cm-(-2),pH of 7.0,and supporting electrolyte of 0.5 wt%Na2SO4 after 2 h electrolysis in a 3D reactor.These results show that aniline can be significantly removed on the Ti/TiOxHy/Sb-SnO2electrode,which provides an efficient way for elimination of aniline from aqueous solution. 展开更多
关键词 Aniline Ti/TiOxHy/Sb-SnO2electrode Electrochemical oxidation Chloride ions Three-dimensional reactor
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β-PbO2/Sb-SnO2/Ti电极的苯酚电催化性能研究 认领 引用 被引量：3
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作者 李鹏 赵跃民 +2 位作者 王立章 张延乐 芦兆青 《电化学》 CSCD 北大核心 2014年第5期493-498,共6页
采用刷涂热解-电镀工艺制得了β-PbO2/Sb-SnO2/Ti电极.采用X射线衍射（X-ray Diffraction,XRD）和扫描电镜（Scanning Electron Microscope,SEM）进行物相组成分析与微观形貌观察.Sb-SnO2中间层抑制PbF2的生成,NaF促进二氧化铅晶粒的成... 采用刷涂热解-电镀工艺制得了β-PbO2/Sb-SnO2/Ti电极.采用X射线衍射（X-ray Diffraction,XRD）和扫描电镜（Scanning Electron Microscope,SEM）进行物相组成分析与微观形貌观察.Sb-SnO2中间层抑制PbF2的生成,NaF促进二氧化铅晶粒的成型与分散,消除了β-PbO2聚团.据谢乐公式（Scherrer）计算晶粒尺寸为25.2 nm,电极表面结晶度高达100%.极化测试显示,β-PbO2/Sb-SnO2/Ti电极扩散段电位区、析氧电位和Tafel斜率分别为1.85～2.15 V、2.08 V和0.84,优于β-PbO2/Ti电极的1.40～1.80 V、1.75 V和0.36.使用β-PbO2/Sb-SnO2/Ti、β-PbO2/Ti电极在9 mA·cm-2电流密度对苯酚模拟废水处理240 min,前者COD（Chemical Oxygen Demand）去除率、电流效率（Instant Current Efficiency）高达90.1%和63.28%,优于后者66.9%和44.96%.强化寿命测试表明,β-PbO2/Sb-SnO2/Ti电极与β-PbO2/Ti电极相比延长10倍,工业寿命可达8.6a,有较高的工程应用价值. 展开更多
关键词 Sb-SnO2中间层 β-PbO2/Ti 极化特性 电流效率 加速寿命测试
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α-PbO_2型TiO_2电子结构的第一性原理计算 认领 引用 被引量：2
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作者 刘卫平 吴秀玲 +4 位作者 孟大维 于梅花 陈洪 章正杰 郑建平 《矿物岩石》 EI CAS 北大核心 2008年第3期14-18,共5页
基于密度泛函理论(DFT)的平面波超软赝势方法,从第一性原理计算的角度,应用GGA对Ti O2的高压相α-PbO2型Ti O2的晶格参数和电子结构作了比较系统的计算,得到优化后的晶格参数与实验值十分符合。电子结构计算表明α-PbO2型Ti O2属于间接... 基于密度泛函理论(DFT)的平面波超软赝势方法,从第一性原理计算的角度,应用GGA对Ti O2的高压相α-PbO2型Ti O2的晶格参数和电子结构作了比较系统的计算,得到优化后的晶格参数与实验值十分符合。电子结构计算表明α-PbO2型Ti O2属于间接带隙半导体,其禁带宽度为2.47 eV,大于锐钛矿型Ti O2计算的带隙值Eg=2.12eV,主要原因在于α-PbO2型Ti O2结构具有较低的晶体对称性,并且其Ti—O平均键长更长,Ti与O离子的正负电荷数较少,Ti3d轨道与O2p轨道杂化程度较弱。在理论上确认对称性较低的高压矿物—α-PbO2型Ti O2高压相的光催化效果不及常态相锐钛矿型Ti O2好。 展开更多
关键词 高压相 α-PbO2型TiO2 电子结构 第一性原理
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温度对Ti/β-PbO_2-WC复合电极材料耐蚀性的影响 认领 引用 被引量：2
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作者 杜炳谦 陈阵 +2 位作者 余强 朱薇 李会喜 《材料保护》 CAS CSCD 北大核心 2017年第5期42-44,63,共3页
为解决传统锌电积用阳极材料存在的能耗高、污染大、机械强度低、易弯曲等缺陷,以钛为基体,使用WC颗粒掺杂改性,通过直流电镀法制备了Ti/β-PbO_2-WC复合电极。通过电化学Tafel曲线、阻抗谱和扫描电镜等考察了温度对电极表面形貌及耐腐... 为解决传统锌电积用阳极材料存在的能耗高、污染大、机械强度低、易弯曲等缺陷,以钛为基体,使用WC颗粒掺杂改性,通过直流电镀法制备了Ti/β-PbO_2-WC复合电极。通过电化学Tafel曲线、阻抗谱和扫描电镜等考察了温度对电极表面形貌及耐腐蚀性能的影响。结果表明:改性复合电极主要成分为β-PbO_2及少量的WC,当电镀温度为60℃时,β-PbO_2镀层表面平整、晶粒分布均匀,形状规则,电极具有较小的自腐蚀电流密度和较大的电荷转移电阻,且弥散效应较小,耐蚀性良好。 展开更多
关键词 阳极材料 Ti/β-PbO2-WC复合电极 电化学 耐蚀性 钛基体
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Electrochemical oxidation of Rhodamine B with cerium and sodium dodecyl benzene sulfonate co-modified Ti/Pb02electrodes:Preparation,characterization,optimization,application 认领 引用 被引量：3
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作者 Zhen Wei Xuanqi Kang +3 位作者 Shangyuan Xu Xiaokang Zhou Bo Jia Qing Feng 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第4期191-202,共12页
Regulation of the electronic structure and interface property becomes a major strategy in the preparation of electrocatalyst.This paper reports the synthesis of cerium(Ce)and sodium dodecyl benzene sulfonate(SDBS)como... Regulation of the electronic structure and interface property becomes a major strategy in the preparation of electrocatalyst.This paper reports the synthesis of cerium(Ce)and sodium dodecyl benzene sulfonate(SDBS)comodified Ti/PbO2electrodes(Ti/PbO2CeSDBS).Ce and SDBS could greatly change the electronic structure and interface property of PbO2.Ti/PbO2CeSDBS exhibited excellent electrocatalytic activity and stability in Rhodamine B(RhB)electrocatalytic oxidation reaction.The improved electrocatalytic activity associates with the synergistic effect of electronic and interface factors.In the electrochemical degradation of RhB,the removal efficiencies of RhB and COD are about 0.880 and 0.694 respectively after the electrolysis of 220 min with Ti/PbO2Ce4SDBS40,which are higher than the contrast Ti/PbO2electrodes.In the meantime,the accelerated lifetime of Ti/PbO2Ce4SDBS40 is more than 6.2 times than that of Ti/PbO2. 展开更多
关键词 Ti/PbO2electrodes Electrocatalytic oxidation
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