O,O-二丁基二硫代磷酸锌在羧基化多壁碳纳米管粉末微电极上的电氧化行为

Electrooxidation behavior of zinc O,O,O',O'-tetrabutyl bis (phosphorodithioate ) on powder microelectrode of carboxyl modified multi-walled carbon nanotube

以羧基化的多壁碳纳米管(C-MWNT)为电催化材料制成了羧基化多壁碳纳米管粉末微电极(C-MWNT-PME)。采用循环伏安等测试方法研究了O,O-二丁基二硫代磷酸锌(ZBPD)在C-MWNT-PME上的电氧化行为,讨论了扫描速率和底物浓度对其电氧化行为的影响,并进一步研究了C-MWNT-PME在ZBPD电氧化过程中的稳定性。结果表明,多壁碳纳米管经羧基化处理后,其对ZBPD电氧化反应的催化活性得到了明显的提高;ZBPD在C-MWNT-PME上的电氧化反应是一个受扩散控制的不可逆过程;C-MWNT-PME在ZBPD的电氧化过程中具有良好的稳定性。

Powder microelectrode （ C-MWNT-PME ） was made by multi-walled carbon nanotube functionalized by car- boxyl （C-MWNT） as catalytic materials. Electrooxidation be- havior of zinc O, O, O＇, O＇-tetrabutyl bis（phosphorodithioate） （ZBPD） in DMF solution on the C-MWNT-PME was investi- gated by cyclic voltammetry. The influences of scan rate and ZBPD concentration on the electrochemical characteristics of ZBPD were discussed. Results showed that C-MWNT exhibi- ted better catalytic activity for the electrooxidation of ZBPD than the multi-walled carbon nanotube after functionalized by carboxyl; The electrochemical oxidation of ZBPD on C- MWNT-PME was an irreversible process,which was controlled by diffusion. The stability of C-MWNT-PME during the elec- trooxidation process of ZBPD was also investigated, C-MWNT- PME has good stability during the electrooxidation process of ZBPD in DMF solution.