Session: 14-01 Conference Poster Presentation

Paper Number: 115231

115231 - Kinetic Study for Photodynamic Effect of Single-Walled Carbon Nanotubes in Aprotic Media 

It has been confirmed that single-walled carbon nanotubes (SWCNTs) could generate reactive oxygen species (ROS) in aprotic media by utilizing photon energy. However, the impact of photon irradiation on SWCNTs and the kinetics of the generation process in aprotic media are still unclear, which significantly limits the yield performance. In this work, the kinetics for photodynamic effects has been investigated by performing characterizations on ultraviolet (UV)-treated SWCNTs using Raman spectroscopy, conductive atomic force microscope (in-situ), kelvin probe force microscope, and X-ray photoelectron spectroscopy. It is found that UV-treated SWCNTs are observed to have more defects, lower conductivity, and less surface charge after energy conversion. Starting from the fundamental intrinsic properties of SWCNTs, the kinetics and formation of these changes are thoroughly discussed. It turns out that the dispersion, chirality, and structural integrity of SWCNTs are important to achieve high-performance photodynamic effects, which are validated using several different SWCNTs as well as other carbon nanomaterials. A type of (6,5) s-SWCNTs exhibited the highest energy efficiency among a variety of other carbon nanomaterials. The yield rate is 2.15 mM/h and the energy consumption is determined to be 2.79 W▪h/mM. This work is expected to help dramatically boost the energy efficiency of the photodynamic effect in aprotic media and pave the way for designing high-performance carbon nanomaterial-based photoinduced devices.

Presenting Author: Xiaozhou Huang George Mason University

Presenting Author Biography: Xiaozhou Huang received his Ph.D. degree in George Mason University, and his Master's degree in Rice University. He is currently as a visiting researcher at Argonne National Laboratory conducting research on Lithium ion and Lithium-oxygen batteries. He also has strong experience in photocatalyst of carbon nanomaterial for generation of reactive oxygen species, chemical detection for VOC substances and micro-tensile test for advance functional materials.