Xinwei Cui

Pulse Electro-codeposition of Ti / SnO2 – Sb2O4 – CNT Electrode for Phenol Oxidation

Carbon nanotube (CNT) doped SnO 2 Sb 2 O 4 coating was successfully electro-codeposited on a Ti substrate using the pulse electro-codeposition technique. The physicochemical and electrochemical properties as well as the electrocatalytic activity of Ti/SnO 2 Sb 2 O 4 -CNT electrodes were investigated. The service time of the Ti/SnO 2 -Sb 2 O 4 -CNT electrode is 8.8 times longer than that of a Ti/SnO 2 -Sb 2 O 4 electrode prepared by the dip coating method. The chemical oxygen demand removal of the Ti/SnO 2 -Sb 2 O 4 -CNT electrode was 18% higher than that of the Ti/SnO 2 -Sb 2 O 4 electrode prepared by the dip coating method.

Study of Growth Kinetics of Ultra-Long Carbon Nanotube Arrays through Wall Number Statistical Investigation

The unique properties of carbon nanotubes (CNTs) strongly depend on their structures. In this study, the growth kinetics of ultra-long multi-walled CNT (MWCNT) arrays by water-assisted chemical vapor deposition (WACVD) has been investigated based on the statistical studies of CNT wall number. It was found that the kinetics of MWCNT arrays in WACVD demonstrated a lengthening and thickening growth. In the linear lengthening stage, CNT wall number remains constant and catalysts preserve the activity; while in the thickening stage, CNTs thicken substantially through the gas phase-induced thickening process and catalysts start to deactivate. The effects of ethylene and hydrogen flow rates on the MWCNT array growth have also been studied. It was found that by changing ethylene flow rate, different linear lengthening stages corresponding to different CNT wall numbers could be obtained. These findings provide experimental solutions to fabrication MWCNT arrays with both selective heights and controllable wall numbers by WACVD.