Journal
RSC ADVANCES
Volume 8, Issue 22, Pages 12420-12427Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra01363b
Keywords
-
Categories
Funding
- BK21 Plus Program
- Priority Research Centers Program [2009-0093818]
- Basic Science Research Programs [2017R1E1A1A01075350]
- Basic Research Lab Program through the National Research Foundation of Korea (NRF) - Korean government [2014R1A4A1071686]
Ask authors/readers for more resources
Here, we synthesized copper(I) oxide and titanium dioxide nanotubes (TNTs) heterojunctions (HJs) by a photoreduction method using a low-power UV lamp without involving any additional steps, such as chemical reduction, surfactant, or protection agents. Transmission electron microscopy, X-ray diffraction, Raman scattering, X-ray photoelectron spectroscopy, diffuse reflectance spectra, and photoluminescence spectroscopy were carried out to verify the formation of a HJ between the Cu2O nanoparticles (Cu2O NPs) and TNTs. The efficiency and the rate of methylene blue photo-degradation over the Cu2O/TNTs HJ were found to be nearly double and triple compared to the isolated TNTs. The enhanced efficiency is attributed to the narrow band gap and defect states caused by the oxygen vacancies in the vicinity of HJs. Moreover, the type II band alignment of Cu2O NPs and TNTs naturally separates the photo-generated carriers and constrains the recombination process owing to the internal electric field across the Cu2O/TNTs interface.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available