| 氢氧化铝镁钠米颗粒的零电荷点及电荷密度研究 |
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| 引用本文： | 侯万国,夏春友,韩书华,王果庭,张春光.氢氧化铝镁钠米颗粒的零电荷点及电荷密度研究[J].化学学报,1998,56(5):514-520. |
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| 作者姓名： | 侯万国 夏春友 韩书华 王果庭 张春光 |
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| 作者单位： | 山东大学胶体与界面化学国家教委开放实验室,济南,250100 |
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| 基金项目： | 山东大学跨世纪人才基金资助课题 |
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| 摘 要： | 探讨了电位滴定(PT)法测定的零电荷点的物理意义, 认为是零净电荷点(ZPNC)。并对零净电荷点pH(pHZPNC), 零可变电荷点pH(pHZPVC), 永久电荷密度(σP), 可变电荷密度(σV)和净电荷密度(σT)之间的关系进行了理论分析。用PT法测定了氢氧化铝镁纳米颗粒的pHZPNC和σP, 探讨了电解质浓度和pH对各电化学性质的影响规律。另外, 还考察了CO3^2^-对PT法测定结果的影响。
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| 关 键 词： | 电位滴定 电荷密度 纳米相材料 氢氧化铝镁 |
Studies on zero point of charge and charge density of the nanoparticles of aluminum magnesium hydroxide |
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| HOU Wan-Guo,XIA Chun-You,HAN Shu-hua,WANG Guo-Ting,ZHANG Chun-guang.Studies on zero point of charge and charge density of the nanoparticles of aluminum magnesium hydroxide[J].Acta Chimica Sinica,1998,56(5):514-520. |
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| Authors: | HOU Wan-Guo XIA Chun-You HAN Shu-hua WANG Guo-Ting ZHANG Chun-guang |
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| Abstract: | In this paper, the physical meaning of zero point of charge measured by acid-base potentiometric titration (PT) is discussed and it is considered to be zero point of net charge (ZPNC). The interrelations of ZPNC (pHZPNC), zero point of variable charge (PHZPVC), permanent charge density (σp), variable charge density (σy) and total net surface charge density (σT) are theoretically analyzed. The pHZPNC and σp of the nanoparticles of aluminum - magnesium hydroxide are determined by PT method. Effects of electrolyte and pH on various electrochemical parameters are investigated. In addition, effect of CO32- on the results obtained via PT method is also studied. |
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| Keywords: | zero point of charge surface charge density aluminum-magnesium hydroxide nanoparticle potentiometric titration |
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