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OALib Journal期刊
ISSN: 2333-9721
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改性tio2粉体的亲/疏水性及其对甲基橙的吸附
DOI: 10.3969/j.issn.1671-7627.2014.03.005, PP. 22-25
Keywords: tio2,亲/疏水性,化学非均一表面,吸附
Abstract:
以十八烷基三氯硅烷(ots)自组装改性tio2,获得具有化学非均一的表面。采用傅里叶红外光谱仪(ft-ir)、热分析仪(tga)和静态接触角(ca)测量仪对样品进行表征;采用分光光度计分析样品吸附甲基橙溶液的浓度变化。结果表明:随着ots覆盖率的增加,tio2粉体的疏水性增加;在8%ots覆盖率下,tio2粉体从完全亲水性转为疏水性。这种具有化学非均一表面的tio2粉体对低浓度(<30mg/l)甲基橙溶液具有高的吸附量和吸附速率;而未改性tio2粉体在低浓度下几乎不能吸附。
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