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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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甲烷磺酸体系制备PbO2-Ti电极的晶型调控策略 认领 引用
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作者 韦震 康轩齐 +7 位作者 武佳 刘康 许双文 徐尚元 万江凯 任鹏 贾波 冯庆 《化学研究与应用》 CAS 北大核心 2025年第9期2805-2809,共5页
本文研究了不同温度对甲烷磺酸体系电沉积制备PbO2-Ti电极晶型的影响,对于揭示电沉积动力学机制、优化晶体形貌调控、提升镀层功能特性具有重要理论价值。利用SEM、XRD和XPS分析了电极的表面形貌、晶体结构和元素组成,同时与传统硝... 本文研究了不同温度对甲烷磺酸体系电沉积制备PbO2-Ti电极晶型的影响,对于揭示电沉积动力学机制、优化晶体形貌调控、提升镀层功能特性具有重要理论价值。利用SEM、XRD和XPS分析了电极的表面形貌、晶体结构和元素组成,同时与传统硝酸体系电沉积制备PbO2-Ti电极性能进行了对比。结果表明,随着电沉积温度的升高,甲烷磺酸体系制备的PbO2-Ti电极易形成α-PbO2,但是温度高于80℃,更易形成β-PbO2。通过电化学性能测试、强化寿命测试和运行槽电压数据可知,最优甲烷磺酸体系电沉积温度为70℃,电沉积电流密度600 mA·cm-2,甲烷磺酸体系电沉积制备的PbO2-Ti电极性能优于传统硝酸体系,其中析氧电位减少了7.14%,强化寿命延长了53.8%,槽电压降低显著。 展开更多
关键词 甲烷磺酸体系 PbO2-Ti电极 晶型 硝酸体系
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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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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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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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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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Electrochemical treatment of COD in biologically pretreated coking wastewater using Ti/RuO2-IrO2 electrodes combined with modified coke 认领 引用 被引量：3
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作者 HE Xu-wen LIU Li-yuan GONG Jing-wen WANG Jian-bing QIN Qiang WANG Hao 《Journal of Coal Science & Engineering(China)》 2011年第4期426-430,共5页
The electrochemical treatment of COD contained in biologically pretreated coking wastewater treated by a three-dimensional electrode system with modified coke as the particle electrode was investigated. And the electr... The electrochemical treatment of COD contained in biologically pretreated coking wastewater treated by a three-dimensional electrode system with modified coke as the particle electrode was investigated. And the electrochemical perromance of the coke modified with various active components was studied. The results show that the coke modified with Fe（NO3）2 has the lowest energy consumption and higher COD removal rate under the same condition, and the modified coke has better surface characteristics for the purpose of this study. In addition, the kinetic constant was also calculated. The study shows that the three-dimensional electrode system with Fe （NO3）z-modified coke can give a satisfactory solution in biologically pretreated coking wastewater. 展开更多
关键词 three-dimensional electrode Ti/RuO2-IrO2 anode Fe （NO3）2-modified coke coking wastewater
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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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基于Ti/PbO2阳极和多壁碳纳米管的电化学水处理技术研究综述 认领 引用
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作者 韩子轩 陈雷 +3 位作者 王志鹏 许奇峰 赵俊杰 林英姿 《云南化工》 CAS 2025年第5期18-21,共4页
综述了基于Ti/PbO2阳极和多壁碳纳米管(MWCNTs)的电化学水处理技术研究进展。首先,介绍了Ti/PbO2阳极和MWCNTs的协同作用机制,重点分析了其在原位H2O2合成、有机污染物降解及硝酸盐去除中的高效性能;其次,回顾了三维电化学... 综述了基于Ti/PbO2阳极和多壁碳纳米管(MWCNTs)的电化学水处理技术研究进展。首先,介绍了Ti/PbO2阳极和MWCNTs的协同作用机制,重点分析了其在原位H2O2合成、有机污染物降解及硝酸盐去除中的高效性能;其次,回顾了三维电化学系统中MWCNTs-OH电极的结构优势,指出其通过增强羟基自由基(·OH)生成显著提升了抗生素类污染物的降解效率;此外,探讨了Ti/PbO2阳极与碳纸阴极组合对硝酸盐的选择性还原特性,阐明氯离子对总氮去除的协同强化机理。分析表明,电流密度、pH值及催化剂负载量是影响系统效能的核心参数,而电极钝化与稳定性问题仍是实际应用的主要瓶颈。针对现有挑战,提出:一是,通过纳米复合改性提升Ti/PbO2阳极的耐腐蚀性与导电性;二是,开发多孔结构MWCNTs基颗粒电极以优化三维电化学系统的传质效率;三是,耦合智能控制技术实现电解参数动态调控。最后,展望了该技术的未来发展方向,强调需结合绿色催化剂设计、多功能电极集成及规模化工艺优化,推动电化学水处理技术在工业废水、农业面源污染治理等领域的广泛应用。 展开更多
关键词 水污染 电化学水处理技术 电极 Ti/PbO2阳极 MWCNTs
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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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Electro-catalytic degradation properties of Ti/SnO_2–Sb electrodes doped with different rare earths 认领 引用 被引量：6
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作者 Fu-Liang Zhu Yan-Shuang Meng Xiu-Yang Huang 《Rare Metals》 SCIE EI CAS CSCD 2016年第5期412-418,共7页
Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of t... Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of the electrode can be significantly improved by doping rare earth（RE） ions into the oxide coating of Ti/SnO2–Sb electrode. Ti/SnO2–Sb electrodes doped with different RE elements（Ce, Dy, La, and Eu） were prepared by the thermal decomposition method at 550 ℃. Electro-catalytic degradation performances of electrodes doped with different RE elements were evaluated by linear sweep voltammetry（LSV） and Tafel curves. During the electrolysis,the conversion of p-nitrophenol was performed with these electrodes as anodes under galvanostatic control. The structures and morphologies of the surface coating of the electrodes were characterized by scanning electron microscope（SEM）. The results demonstrate that the electro-catalytic degradation performances of Ti/SnO2–Sb electrodes are improved to different levels by doping different RE ions. Improved Ti/SnO2–Sb electrodes by the introduction of different RE have higher oxygen evolution potential, better electro-catalysis ability, better coverage,and longer electrode life. 展开更多
关键词 Ti/SnO_2–Sb electrode Rare earth doped Thermal decomposition method Catalytic degradation
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Photoelectrocatalytic Oxidation of Ethinylestradiol on a Ti/TiO2Electrode: Degradation Efficiency and Search for By-Products 认领 引用
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作者 Karla Moreira Vieira Fabiana Maria Monteiro Paschoal +2 位作者 Maria Valnice Boldrin Zanoni Clésia Cristina Nascentes Rodinei Augusti 《Green and Sustainable Chemistry》 2014年第3期151-161,共11页
The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPL... The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPLC/UV analysis shows that EE (at 0.34 mmol) is totally consumed after 30 minutes of exposure to the photoelectrocatalytic system in the presence of Na2SO4 (0.1 mol·L-1) and with an applied bias potential of +1.0 V versus the Ag/AgCl reference electrode. Moreover, monitoring by direct infusion electrospray ionization mass spectrometry (ESI-MS) and SPME-GC/ MS (solid phase microextraction coupled with gas chromatography-mass spectrometry) reveals that apparently no degradation products are formed under these conditions. Hence, this study demonstrates that the photoelectrocatalytic system can be efficiently used to promote the complete degradation (and likely mineralization) of this hormone under these conditions. 展开更多
关键词 Photoelectrocatalytic Oxidation Ethinylestradiol Ti/TiO2 Thin-Film Electrode Degradation Efficiency Search for By-Products
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聚苯胺中间层改性Ti/PbO2电极的制备及其降解性能 认领 引用 被引量：11
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作者 赵媛媛 刘文静 +3 位作者 董培 张亮 杨政伟 赵朝成 《化工进展》 EI CAS CSCD 北大核心 2019年第12期5478-5486,共9页
引入导电聚合物聚苯胺膜(PANI,polyaniline)对Ti/PbO2电极进行改性,采用两步电沉积法成功制备出Ti/PANI/PbO2电极。通过扫描电镜(SEM)、X射线衍射(XRD)、线性伏安扫描(LSV)和交流阻抗(EIS)对制备的电极进行表征,以甲基橙为目标污染物,... 引入导电聚合物聚苯胺膜(PANI,polyaniline)对Ti/PbO2电极进行改性,采用两步电沉积法成功制备出Ti/PANI/PbO2电极。通过扫描电镜(SEM)、X射线衍射(XRD)、线性伏安扫描(LSV)和交流阻抗(EIS)对制备的电极进行表征,以甲基橙为目标污染物,探讨了PANI的沉积时间对电极性能的影响,并研究了Ti/PANI/PbO2电极对罗丹明B和4-硝基苯酚的降解性能。结果表明,PANI的引入未影响活性层PbO2的晶相结构和形貌特征,但显著提高了电极的析氧电位,Ti/PANI/PbO2的析氧电位可达3.43V。当PANI聚合时间为30min时,电极Ti/PANI-30/PbO2的电化学性能和电催化降解效果最佳。在电流密度为30mA/cm^2、污染物初始浓度为50mg/L、Na2SO4浓度为0.1mol/L的实验条件下,反应120min后,Ti/PANI-30/PbO2对甲基橙、罗丹明B和4-硝基苯酚的去除率分别为99.8%、99.9%和94.0%。 展开更多
关键词 Ti/PANI/PbO2电极 聚苯胺膜 电催化氧化 羟基自由基 甲基橙降解
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稀土Y掺杂Ti/SnO_2+MnO_x/PbO_2电极的电化学性能研究 认领 引用 被引量：10
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作者 褚秋霞 梁镇海 +2 位作者 孙颜发 王荣鹏 樊彩梅 《稀有金属材料与工程》 SCIE EI CAS 北大核心 2009年第5期821-825,共5页
采用热分解和电沉积的方法制备了稀土元素Y掺杂Ti/SnO2+MnOx/PbO2耐酸阳极。用XRD、SEM表征了电极的物相和表面形貌,用CV、EIS测定了电极的电化学性能,并研究了Y掺杂对电极在强酸性溶液中使用寿命的影响。结果表明:Y以Y2O3的形式与SnO2... 采用热分解和电沉积的方法制备了稀土元素Y掺杂Ti/SnO2+MnOx/PbO2耐酸阳极。用XRD、SEM表征了电极的物相和表面形貌,用CV、EIS测定了电极的电化学性能,并研究了Y掺杂对电极在强酸性溶液中使用寿命的影响。结果表明:Y以Y2O3的形式与SnO2形成半导体固溶体,使电极在高电流密度(4A/cm2)下的预期使用寿命达到70h;同时该电极的析氧电位高达2.1V,且电极表面呈蘑菇状,电催化性较好,Ti/SnO2+Y2O3+MnOx/PbO2电极是一种较理想的耐酸阳极材料。 展开更多
关键词 稀土Y Ti/SnO2+MnOx/PbO2电极 耐酸阳极
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硫酸溶液中苯酚在Ti/PbO_2电极上的循环伏安研究 认领 引用 被引量：6
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作者 董艳杰 林海波 +2 位作者 刘小波 任秀彬 姜梅 《化学学报》 SCIE CAS 北大核心 2007年第20期2257-2260,共4页
用循环伏安法研究了Ti/PbO2电极在苯酚硫酸溶液中的电催化作用.结果表明,在硫酸溶液中,Ti/PbO2阳极对苯酚具有电催化氧化作用.如果苯酚浓度较低,产生的吸附态羟基自由基可以将苯酚氧化,直至完全矿化.当苯酚浓度较高或产生的羟基自由基... 用循环伏安法研究了Ti/PbO2电极在苯酚硫酸溶液中的电催化作用.结果表明,在硫酸溶液中,Ti/PbO2阳极对苯酚具有电催化氧化作用.如果苯酚浓度较低,产生的吸附态羟基自由基可以将苯酚氧化,直至完全矿化.当苯酚浓度较高或产生的羟基自由基量相对较小时,苯酚或中间产物可吸附在电极表面,降低电极的真实表面积,减少电极的活性点,阻止反应物接近电极表面,抑制苯酚的进一步氧化.随着电解时间的延长,这些吸附物由于逐渐被氧化,电极活性恢复. 展开更多
关键词 苯酚 循环伏安 Ti/PbO2电极 电化学氧化
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酸性橙7在PbO_2/Ti和IrO_2-Ta_2O_5/Ti电极上的电催化氧化 认领 引用 被引量：4
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作者 乔启成 赵跃民 +3 位作者 王立章 杨春和 谷玲玲 吴秀琴 《环境工程学报》 CAS CSCD 北大核心 2014年第12期5085-5090,共6页
采用PbO2/Ti和IrO2-Ta2O5/Ti电极对酸性橙7(AO7)模拟废水进行了电解处理实验研究。考察了2种电极上不同电流密度条件下AO7的去除率、反应动力学、COD去除效果及瞬时电流效率,结果表明,在相同条件下,PbO2/Ti电极表现出更好的处理效率、... 采用PbO2/Ti和IrO2-Ta2O5/Ti电极对酸性橙7(AO7)模拟废水进行了电解处理实验研究。考察了2种电极上不同电流密度条件下AO7的去除率、反应动力学、COD去除效果及瞬时电流效率,结果表明,在相同条件下,PbO2/Ti电极表现出更好的处理效率、更适合用于AO7的矿化。循环伏安(CV)曲线表明,PbO2/Ti电极具有更高的析氧电位且在AO7电解液中出现了氧化峰,说明PbO2/Ti电极对AO7具有更好的催化活性和直接氧化能力。紫外可见光谱对比分析表明,IrO2-Ta2O5/Ti电极对AO7的结构破坏速度缓慢且伴随苯胺等中间产物产生,对AO7的矿化程度弱。对比结果说明PbO2/Ti电极更适合于偶氮类染料废水的电催化氧化处理。 展开更多
关键词 酸性橙7 PbO2/Ti电极 IrO2-Ta2O5/Ti电极 电催化氧化
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高效Ti/PbO_2电极制备及对酸性红G的降解研究 认领 引用 被引量：10
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作者 李晓良 徐浩 延卫 《中国环境科学》 EI CAS CSSCI CSCD 北大核心 2017年第7期2591-2598,共8页
以十二烷基三甲基氯化铵(DTAC)作为添加剂,采用共沉积方式制备新型Ti/PbO_2电极,分别采用扫描电镜、X射线衍射、循环伏安扫描、交流阻抗、X射线光电子能谱及强化寿命等手段对电极性能进行表征,并以酸性红G(ARG)作为目标有机物,考察了添... 以十二烷基三甲基氯化铵(DTAC)作为添加剂,采用共沉积方式制备新型Ti/PbO_2电极,分别采用扫描电镜、X射线衍射、循环伏安扫描、交流阻抗、X射线光电子能谱及强化寿命等手段对电极性能进行表征,并以酸性红G(ARG)作为目标有机物,考察了添加剂对电极性能的影响.结果表明,经过DTAC改性,电极表层晶相仍为β-PbO_2,但电极表面颗粒细化,比表面积增加,析氧过电位由1.845V提升至1.886V,膜阻抗由102.1?/cm2下降至55.7?/cm2.此外,通过ARG电催化降解及强化寿命测试表明,改性后电极的催化性能及稳定性能均有了很大的提高.其中,对于最优改性电极(PbO_2-DTAC(0.5)),电解60min后ARG的脱色率高达86.8%,强化寿命可达到232.5h,是改性前电极寿命的2倍多(96h). 展开更多
关键词 十二烷基三甲基氯化铵 改性 Ti/PbO2电极 电催化氧化
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