活性碳纤维ZnO—SACF氧化还原机理的研究  

Study on the Redox Mechanism of Activated Carbon Fiber ZnO-SACF

作　　者：岳中仁[1] 陆耘[1] 符若文[1] 曾汉民[1] 

机构地区：[1]中山大学材料科学研究所

出　　处：《离子交换与吸附》1995年第4期326-333,共8页Ion Exchange and Adsorption

基　　金：国家自然科学基金;国家教委博士点基金;广东省自然科学基金

摘　　要：本文借助于ＩＲ，ＴＧ和ＸＰＳ，研究了ＺｎＯ—ＳＡＣＦ制备过程中及其吸附Ａｇ＋和Ａｕ３＋前后的化学结构变化。实验结果表明：从ＳＡＣＦ到ＺｎＯ－ＳＡＣＦ，纤维表面上的Ｏ／Ｃ原子比和含氧基因如Ｃ＝Ｏ和ＣＯＯ都有所减少；ＺｎＯ—ＳＡＣＦ上还原性功能基团主要是～Ｃ—ＯＨ，当ＺｎＯ—ＳＡＣＦ吸附Ａｇ＋后，～Ｃ—ＯＨ被氧化为～Ｃ＝Ｏ，而当其吸附Ａｕ３＋后，～Ｃ—ＯＨ被氧化为～Ｃ＝Ｏ和～Ｃ－ＯＨ。ＺｎＯ—ＳＡＣＦ吸附Ａｇ＋后在纤维表面上可生成大的银片，这一现象可以认为与ＺｎＯ—ＳＡＣＦ上的ＺｎＯ有关。The changes in chemical structures of the ZnO-SACF, from SACF to ZnO-SACF, before and after the adsorption of Ag+ and Au3+on ZnO-SACF, were studied by means of TG,IR and XPS. The experimental results show that ZnO-SACF has less O/C ratio and oxygen -containing groups such as C=O and COO than SACF. The reduction functional group on ZnO-SACF is mainly C-OH which is oxidized into C=Oand COO by Ag+and Au3+. After the adsorption of Ag+, C-OH can be oxidized into C=O, in the case of Au3+, C-OH can be oxidized into C=O and COO. ZnO in ZnO-SACF can enhance redox adsorption of Ag+and Au3+. The phenomenon that Ag reduced and adsorbed on the surface of ZnO-SACF can grow into larger silver particle, is considered to be associated with ZnO on the surface of ZnO -SACF.

关 键 词：碳纤维 氧化还原吸附 反应机理 氧化锌 SACF 

分 类 号：O647.311[理学—物理化学]