TY  - JOUR
T1  - Growth ZnO Nanorod Arrays and its Photocatalytic Activity
Under Visible Light Irradiation
AU - Giang Bach, Long AU - Thi Thanh Tam, Dinh AU - Thi Ngoc Quyen, Tran AU - Hanh Thu Vu, Thi 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 20
SP  - 7437
EP  - 7441
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.7437.7441
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.7437.7441
KW  - ZnO nanorod arrays
KW  -photocatalysis
KW  -methylene blue
KW  -formation
KW  -hexagonal morphology
KW  -highest
percentage
AB  - In this study, visible light active Zinc Oxide Nanorod arrays (ZnO NRs) were successfully prepared
by an electrochemical process using Al-doped ZnO film (AZO) as an electrode, followed by annealed in ambient
at difference temperature (100-500°C). The as-prepared ZnO NRs were characterized by SEM, XRD and PL
technique. From the XRD and SEM results, ZnO NRs possess hexagonal morphology with an average diameter
of 50-60 nm and the average length of 1.2-1.3 μm was obtained. From PL spectrum, the annealed temperature
significant effects on the surface defects in ZnO NRs which can be enhanced visible light absorption.
Moreover, ZnO NRs sample annealed at 300°C exhibited the highest PL peak, having the highest formation rate
of COH radicals and the highest percentage of Methylene Blue (MB) removal (76.05%) under visible light
irradiation. This result indicates that the formation rate of •OH radicals shows a good correlation with the
photocatalytic activity.
ER  -