n95928SE Academic Article uri icon

abstract

  • This paper presents the synthesis of visible-light-harvesting photocatalyst, Ag@AgBr/carbon nanotubes (CNT) nanocomposites, by the photoreduction of AgBr/CNT, which was independently prepared by the deposition-precipitation method. Nanocomposites with different carbon tubes lengths were characterized by X-ray diffraction, Brunauer-Emmett-Teller (BET) surface area, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy (EIS) techniques. Ag@AgBr nanopaparticles were found to be anchored onto the surface of CNT. EIS measurements suggested that the longer CNT in Ag@AgBr/CNT were more efficient in transporting charges than that of the shorter length CNT, which agreed with the observed trend of photocatalytic reduction of CO 2 under visible light ( > 420 nm) (Ag@AgBr/CNT-L > Ag@AgBr/CNT-M > Ag@AgBr/CNT-S). The study on the photocatalytic reduction of CO2 to methane, CO, methanol, and ethanol suggested that the reduction process favored under neutral and weak alkaline conditions. Ag@AgBr/CNT can maintain the high stability in five repeated uses. 2013 Elsevier B.V.

published proceedings

  • Catalysis Today

author list (cited authors)

  • Abou Asi, M., Zhu, L., He, C., Sharma, V. K., Shu, D., Li, S., Yang, J., & Xiong, Y. a.

publication date

  • January 1, 2013 11:11 AM