Submit Manuscript  

Article Details


Synthesis of ZnO Microstructure Decorated with Ag Nanoparticles at Different Annealing Temperature and their Photocatalytic Activity

Author(s):

Hartini Ahmad Rafaie*, Nor Atikah Embong, Nurul Infaza Talalah Ramli, Ruziana Mohamed and Muhd Firdaus Kasim   Pages 1 - 9 ( 9 )

Abstract:


Background: ZnO microstructures decorated with Ag nanoparticles (AgZnO) were synthesized by sol-gel method. Methodology: The samples were annealed at different annealing temperature ranging from 500 to 700oC, respectively. The effect of different annealing temperature on the crystal structure and morphologies of prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and energy dispersive X-ray spectrum (EDS). The photocatalytic degradation reaction is tested by the decomposition of methylene blue (MB) dye under ultra violet (UV) irradiation for 60 minutes. Conclusion: The EDS result demonstrated that the particle-like AgZnO samples consist of element Zn, O and Ag. XRD analysis shows that the AgZnO exhibited a hexagonal wurtzite crystal structure of ZnO and face-centered cubic (FCC) of Ag. The crystallite size was increased as annealing temperature was increased in the range of 84.14 nm – 103.89 nm. In particular, AgZnO annealed at 700oC exhibits the highest photocatalytic activity by degrading methylene blue (MB) solution by almost 92.99 % in 60 minutes compared to pure ZnO samples.

Keywords:

ZnO microstructure; Ag nanoparticles; photocatalytic; annealing temperature; methylene blue

Affiliation:

Faculty of Applied Science, Universiti Teknologi MARA Pahang, 26400 Bandar Tun Abdul Razak Jengka, Pahang, Faculty of Applied Science, Universiti Teknologi MARA Pahang, 26400 Bandar Tun Abdul Razak Jengka, Pahang, Faculty of Applied Science, Universiti Teknologi MARA Pahang, 26400 Bandar Tun Abdul Razak Jengka, Pahang, Faculty of Applied Science, Universiti Teknologi MARA Pahang, 26400 Bandar Tun Abdul Razak Jengka, Pahang, Center for Nanomaterials Research, Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam Selangor



Read Full-Text article