(中南大學 冶金科學與工程學院， 長沙 410083)
摘 要: 選擇3種有機物作為穩(wěn)定劑， 采用雙氧水回流氧化法制備膠體五氧化二銻，探討了影響膠體粒子大小及分布的主要因素， 并從Zeta電位的觀點研究了膠體的穩(wěn)定性。結果表明: 穩(wěn)定劑的種類及用量、 反應溫度、雙氧水的用量及加入方式、 反應物的固液比是影響膠體粒子大小及分布的主要因素。 2號穩(wěn)定劑的吸附作用、 靜電斥力作用及空間位阻效應導致膠體能穩(wěn)定存放1a以上， 等電點從pH=1.85向更酸性區(qū)移動， Zeta電位從-30mV變?yōu)?60mV。
關鍵字: 膠體五氧化二銻; 穩(wěn)定劑; 粒子大小及分布; 等電點; Zeta電位
prepared by refluxing oxidation with hydrogen perovide as oxidant
（ College of Metallurgical Science and Engineering,
Central South University, Changsha 410083, China）
Abstract: The colloid antimony pentoxide was prepared by refluxing oxidation with hydrogen peroxide as oxidant and three organic agents as stabilizer. The effects on colloidal particles diameters and distributions were discussed. The colloidal stability was studied in the view of Zeta potential. The results show that the size and distribution of colloidal particles are strongly influenced by the addition of stabilizers, reaction temperature, amount of hydrogen peroxide and its adding methods and ratio of reactive solid to liquid. The strong adsorption of stabilizer No.2 on surface of Sb2O5, the electric repulsive force and the steric stabilization energy make colloid Sb2O5 stable at least one year, the colloidal isoelectric point switchs from pH=1.85 to the more acidic field and Zeta potential from -30mV to -60mV.
Key words: colloid Sb2O5; stabilizer; particle diameter and distribution; isoelectric point; Zeta potential
