检索结果-南通市图书馆

Formation of Iodinated Trihalomethane Disinfection By-products by Co-oxidation of Natural Organic Matter with Sodium Hypochlorite and lead dioxide

引用

Chemical Research in Chinese Universities 2023年第3期39卷 449-454页

作者： WANG Junyao HU Xialin LIU Meichuan YIN Daqiang Key Labatory of Yangtze River Water Environment Ministry of EducationCollege of Environmental Science and EngineeringTongji UniversityShanghai200092P.R.China Shanghai Institute of Pollution Control and Ecological Security Tongji UniversityShanghai200092P.R.China School of Chemical Science and Engineering Shanghai Key Lab of Chemical Assessment and SustainabilityTongji UniversityShanghai200092P.R.China

Iodinated trihalomethanes(I-THMs)in drinking water pipelines have attracted wide attention due to their high toxicity.The coexistence of widely present lead dioxide(PbO_(2))with commonly used disinfectant sodium hypochlorite(NaClO)in drinking water might change the formation characteristics of I-THMs due to the strongly oxidizing properties of PbO_(2).This study investigated the formation of I-THMs during the co-oxidation of natural organic matter including humic acid(HA),extracellular organic matter(EOM),and intracellular organic matter(IOM)of algogenic organic matter by PbO_(2) and NaClO.Triiodomethane(CHI_(3))is the dominant product in the single oxidation system of PbO_(2),whereas trichloromethane(CHCl_(3)),chlorodiiodomethane(CHClI_(2)),and dichloroiodomethane(CHCl2I)are the major products in the single NaClO system.In the co-oxidation system,the dominant I-THMs are similar to those in the single NaClO system.However,the CHCl_(3) content decreased to 56.4%whereas I-THMs concentrations remained unchanged with the increase of PbO_(2) concentration.The main reason is attributed to the reduced residual chlorine content due to the reaction of PbO_(2) with NaClO.IOM is more prone to forming I-THMs than HA and EOM due to the specified structures.This study suggested that PbO_(2) in the drinking water supply pipelines might change the risk of THMs.

关键词： lead dioxide Iodinated trihalomethane Humic acid Algogenic organic matter

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrochemical Deposition and Properties of Nanometerstructure Ce-doped lead dioxide Film Electrode

引用

Chinese Journal of Chemistry 2005年第1期23卷 71-75页

作者：艾仁云李嘉庆李洛平彭惠琦杨娅金利通 DepartmentofChemistry EastChinaNormalUniversityShanghai200062China DepartmentofChemistry EastChinaNormalUniversityShanghai200062China//CollegeofChemistryandMaterialScienceShandongAgriculturalUniversityTai'anShandong271018China

The effect of Ce(III) on the morphology and structure of deposited film of lead dioxide was studied by cyclic voltammetry (CV), X‐ray diffractometry (XRD) and scanning tunneling microscopy (STM). The results indicated that the Ce‐doped PbO 2 film consisted of a mixture of α ‐ and β ‐phase of PbO 2 . Ce doping changed the size of PbO 2 crystal grains and made the crystallite size on the electrode surface in the nanometer range. Owing to the formation of nanometer‐structured grains, the specific surface areas and activity sites of the electrode surface were increased, hence the catalytic activity of Ce‐doped PbO 2 electrode was evidently higher than that of undoped PbO 2 electrode.

关键词： lead dioxide cerium oxide modified electrode nanometer‐structure grain anodic electrocatalytic response

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrocatalytic oxidation of gaseous toluene in an all-solid cell using a foam Ti/Sb-SnO2/β-PbO_(2) anode

引用

Journal of Environmental Sciences 2023年第12期134卷 77-85页

作者： Zhikun Liu Weiming Qian Min Chen Wenshuo Zhou Boying Song Bo Zhang Xiaolei Bao Qiong Tang Yongchun Liu Changbin Zhang Aerosol and Haze Laboratory Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Hebei Technological Innovation Center for Volatile Organic Compounds Detection and Treatment in Chemical Industry Department of quality inspection and managementHebei Chemical and Pharmaceutical CollegeShijiazhuang 050026China College of Energy materials and Chemicals Leshan Normal UniversityLeshan 614000China

Mineralization of benzene,toluene,and xylene (BTX) with high efficiency at room temperature is still a challenge for the purification of indoor air.In this work,a foam Ti/Sb-Sn O2/β-Pb O_(2)anode catalyst was prepared for electrocatalytically oxidizing gaseous toluene in an all-solid cell at ambient temperature.The complex Ti/Sb-Sn O_(2)/β-Pb O_(2)anode,which was prepared by sequentially deposing Sb-Sn O_(2)and β-Pb O_(2)on a foam Ti substrate,shows high electrocatalytic oxidation efficiency of toluene (80%) at 7 hr of reaction and high CO_(2)selectivity (94.9%) under an optimized condition,i.e.,a cell voltage of 2.0 V,relative humidity of60%and a flow rate of 100 m L/min.The better catalytic performance can be ascribed to the high production rate of·OH radicals from discharging adsorbed water and the inhibition of oxygen evolution on the surface of foam Ti/Sb-Sn O_(2)/β-Pb O_(2)anode when compared with the foam Ti/Sb-Sn O_(2)anode.Our results demonstrate that prepared complex electrodes can be potentially used for electrocatalytic removal of gaseous toluene at room temperature with a good performance.

关键词： Gaseous toluene Electrocatalytic oxidation lead dioxide Indoor air purification Solid cell

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Embedding wasted hairs in Ti/PbO_(2) anode for efficient and sustainable electrochemical oxidation of organic wastewater

引用

Chinese Chemical Letters 2022年第3期33卷 1288-1292页

作者： Dan Shao Zekang Wang Cuiping Zhang Weijia Li Hao Xu Guoqiang Tan Wei Yan School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science&TechnologyXi'an 710021China Department of Environmental Engineering Xi'an Jiaotong University Xi'an710049China

Despite of the hazardous risk of Pb^(2+) leakage, lead dioxide has been attributed as a quasi-ideal anode material with high oxygen evolution potential, excellent conductivity, good stability and low cost in electrochemical oxidation wastewater treatment technique. In this study, a novel Ti/PbO_(2) anode was fabricated by embedding raw materials that are readily and cheaply available, i.e., hairs. The structure-activity relationship of the new electrode was firstly revealed by material and electrochemical characterizations. Then different levels of pollutants (azo dye, phenol and maleic acid) were used to investigate the electrochemical oxidation performance of the new electrode. Finally, the accelerated electrode lifetime and Pb^(2+) leakage tests were carried out. Results showed that the embedded hairs changed the preferential crystallographic orientation of PbO_(2) and decreased the grain size. Hairs introduced additional roughness and active sites, and decreased the electrode impedance, especially under 5 mg/cm^(2) of embedding amount. The removal efficiencies of different target pollutants were enhanced more or less by embedding appropriate amount of hairs, depending on the current density, but loading excessive hairs had a negative effect. The accumulation of intermediate products during phenol degradation was also changed by the hairs. The new electrode could undergo ~550 h of harsh electrolysis. It is also relieved that the Pb^(2+) leakage was found to be suppressed during this long-term electrolysis process.

关键词： Wastewater treatment lead dioxide Fiber Composite Intermediate product

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quick fabrication of evenly porous PbO_(2) through potential linear increase electrodeposition

引用

Chinese Chemical Letters 2023年第7期34卷 240-243页

作者： Hua Guo Wenyu Hu Zekun Zhang Duowen Yang Siyuan Guo Xiaosheng Jing Hao Xu Wei Yan Department of Environmental Science and Engineering Xi'an Jiaotong UniversityXian 710049China Research Institute of Xi'an Jiaotong University Hangzhou 311200China

Anodic oxidation electrodeposition is the primary way to prepare lead dioxide anode. The regulation of the external circuit for the reaction is a unique advantage of electrocatalytic reaction, which can regulate crystallization and accelerate the reaction process. In this study, lead dioxide coatings with uniform pore size distribution were quickly prepared on three different substrates by potential linear increase electrodeposition(PLIED). Morphology and structure analysis shows that the prepared electrodes have uniform porous morphology, and Ti/SnO_(2)/PLIED has the smallest grain size. Three electrodes all display well degradation performance to azophloxine and diclofenac sodium. Ti/PLIED, and Ti/SnO_(2)/PLIED are appreciated for degrading organics with a simple structure in low concentrations. At the same time,Ti/SnO_(2)/PLIED is more suitable for complex organics in high concentrations. Electrochemical activity tests indicate the different mechanisms of the PLIED electrodes that build the other degradation performance.Three PLIED electrodes show excellent electrical and electrochemical stability during the cycle degradation process. The results provide a reference for the subsequent anodic oxidation electrodeposition research and the regulating effect of the external circuit on coating properties.

关键词： lead dioxide Bubble template Porous electrode Adsorption electrochemical porosity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Performance of PbO_2/activated carbon hybrid supercapacitor with carbon foam substrate

引用

Chinese Chemical Letters 2012年第5期23卷 623-626页

作者： Wu Zhang Yao Hui Qu Li Jun Gao Department of Chemistry Nanchang UniversityNanchang 330031China School of Energy Soochow UniversitySuzhou 215006China

PbO_2/activated carbon（AC） hybrid supercapacitor in H_2SO_4 with a carbon foam current collector is studied.The PbO_2/AC hybrid is designed with electrodeposited PbO_2 thin film as positive electrode to match with AC negative electrode.The discharge curve shows capacitive characteristics between 1.88 V and 0.65 V.The hybrid system exhibits excellent energy and power performance,with specific energy of 43.6 Wh/kg at a power density of 654.2 W/kg.The use of carbon foam current collector ensures stability of the PbO_2 electrode in H_2SO_4 environment.After 2600 deep cycles at 15 C high rate of charge/discharge,the capacity remains nearly unchanged from its initial value.

关键词： Hybrid supercapacitor lead dioxide Activated carbon Carbon foam

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

KINETICS OF OXYGEN EVOLUTION REACTION ON PbO_2-Ti/MnO_2 ELECTRODE AND ELEC TRO CATALYSIS

引用

Acta Metallurgica Sinica(English Letters) 1992年第10期5卷 280-286页

作者： CHEN Zhenfang JIANC Hanying SHU Yude CHEN Xinmin Central South University of Technology,Changsha,China

The kinetics of oxygen evolution reaction(OER)on PbO_2-Ti/MnO_2 electrode has been studied using galvanistatic technique.In terms of kinetic parameters,the reaction path of OER is proposed.The electrocataIytic activity of lead dioxide and manganese dioxide has been discussed according to the theory of molecular orbit and quantum chemistry caIculation.It is concluded that the electrocatalytic activity of manganese dioxide is higher than that of lead dioxid,which is in agreement with the experimental result.

关键词： manganese dioxide lead dioxide oxygen evolution reaction electrocatalysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：