(西北工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，西安 710072)
摘 要: 采用混酸法制備羧基化多壁碳納米管以及采用超聲凝聚法制備殼聚糖納米粒子，再通過靜電自組裝的方法制備碳納米管/殼聚糖(相對分子質(zhì)量(Mr)不小于5萬和不小于10萬)、碳納米管/高密度殼聚糖、碳納米管/羧化殼聚糖、多壁碳納米管/殼聚糖鹽酸鹽復(fù)合材料。通過SEM、HRTEM及XRD對產(chǎn)品進(jìn)行微觀結(jié)構(gòu)分析，利用循環(huán)伏安法對H2O2在碳納米管/殼聚糖修飾電極上的電化學(xué)行為進(jìn)行研究。結(jié)果表明：殼聚糖鹽酸鹽對碳納米管具有較好的包覆效果，包覆層厚度約為3.5 nm，靜置12 h后具有良好的溶液分散性；碳納米管/殼聚糖鹽酸鹽修飾玻碳電極改善了H2O2的氧化還原電流，同時還降低了H2O2的氧化還原的過電勢，對其電化學(xué)催化性能具有良好的促進(jìn)作用。
關(guān)鍵字: 多壁碳納米管；殼聚糖；靜電自組裝；電催化性能
multi-walled carbon nanotubes/chitosan composites
（School of Materials and Engineering Science, Northwestern Polytechnical University, Xi’an 710072, China）
Abstract:Functionalized multi-walled carbon nanotubes(f-MWCNTs) were prepared by mixed acids. And chitosan(CS) nanoparticles were prepared by precipitation methods. MWCNTs/CS (Mr≥50 000 and Mr≥100 000), MWCNTs/super high density CS, MWCNTs/CS hydrochloride and MWCNTs/carboxylation CS nanocomposites were synthesized by electrostatic self-assembly. The microstructures of MWCNTs/CS composites were analyzed by means of SEM, HRTEM and XRD. The electrochemical properties of H2O2 decorated with MWCNTs/CS hydrochloride composites glass-carbon electrode were tested by cyclic voltammetry. The results indicate that MWCNTs/CS hydrochloride composite possesses the best coating effects and the dispersion after standing for 12 h. The thickness of CS grafted on the surface of MWCNTs is about 3.5 nm. MWCNTs hydrochloride composite glass-carbon electrode improves the current and decreases the overpotential of H2O2 redox. The modified electrode displays good stability and reproducibility.
Key words: multi-walled carbon nanotubes(MWCNTs); chitosan(CS); electrostatic self-assembly; electrocatalytic property
