TY - JOUR
T1 - A facile preparation of ZnO/Au nano-needles
T2 - Optical, morphological and structural properties
AU - Saputra, Iwan Syahjoko
AU - Apriandanu, Dewangga Oky Bagus
AU - Yulizar, Yoki
AU - Maryanti, Evi
AU - Permana, Yogi Nopiandi
AU - Suhartati, Siti
AU - Sudirman,
N1 - Funding Information:
This research was funded by Institut Teknologi Sumatera under Research Grant for Hibah Publikasi GBU-45 .
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11
Y1 - 2021/11
N2 - Gold-doped ZnO (ZnO/Au) nano-needles were successfully synthesized in the shape of nano-needles through an aqueous medium using Pennisetum purpureum leaf extract. The Pennisetum purpureum acts as the natural bioreduction of Au3+ ions to Au0. Zinc nitrate hexahydrate (Zn(NO3)2·6H2O), hexamethylenetetramine (C6H12N4), and tetrachloroauric III acid (HAuCl4) solutions were employed as precursors. ZnO/Au nano-needles was characterized by Scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDX), Particle size analyzer (PSA), UV–Vis diffuse reflectance spectroscopy (DRS), X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). SEM images show that the morphology change of ZnO to ZnO/Au was observed from hexagonal nano-tubes to nano-needles with the composition Zn, O, and Au confirmed by EDS characterization. The average particle size distribution of ZnO and ZnO/Au were 9.23 and 51.30 nm, respectively. The bandgap value of ZnO decreased from 3.3 to 2.5 eV after modification with Au. XRD analysis showed the crystallite size average of ZnO and ZnO/Au nano-needles which were found to be 12.30 and 30.25 nm, respectively. Raman spectra showed the existence of strong Au vibration in ZnO/Au nano-needles at 643 cm−1. FTIR spectra showed the presence of strong vibration of ZnO/Au nano-needles at 321 cm−1. Importantly, this research offers a feasible and low-cost method for the synthesis of ZnO/Au with a specified shape of nano-needles.
AB - Gold-doped ZnO (ZnO/Au) nano-needles were successfully synthesized in the shape of nano-needles through an aqueous medium using Pennisetum purpureum leaf extract. The Pennisetum purpureum acts as the natural bioreduction of Au3+ ions to Au0. Zinc nitrate hexahydrate (Zn(NO3)2·6H2O), hexamethylenetetramine (C6H12N4), and tetrachloroauric III acid (HAuCl4) solutions were employed as precursors. ZnO/Au nano-needles was characterized by Scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDX), Particle size analyzer (PSA), UV–Vis diffuse reflectance spectroscopy (DRS), X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). SEM images show that the morphology change of ZnO to ZnO/Au was observed from hexagonal nano-tubes to nano-needles with the composition Zn, O, and Au confirmed by EDS characterization. The average particle size distribution of ZnO and ZnO/Au were 9.23 and 51.30 nm, respectively. The bandgap value of ZnO decreased from 3.3 to 2.5 eV after modification with Au. XRD analysis showed the crystallite size average of ZnO and ZnO/Au nano-needles which were found to be 12.30 and 30.25 nm, respectively. Raman spectra showed the existence of strong Au vibration in ZnO/Au nano-needles at 643 cm−1. FTIR spectra showed the presence of strong vibration of ZnO/Au nano-needles at 321 cm−1. Importantly, this research offers a feasible and low-cost method for the synthesis of ZnO/Au with a specified shape of nano-needles.
KW - Characterizations
KW - Nano-needles
KW - Nanocomposite
KW - Pennisetum purpureum
KW - ZnO/Au
UR - http://www.scopus.com/inward/record.url?scp=85116351917&partnerID=8YFLogxK
U2 - 10.1016/j.optmat.2021.111628
DO - 10.1016/j.optmat.2021.111628
M3 - Article
AN - SCOPUS:85116351917
SN - 0925-3467
VL - 121
JO - Optical Materials
JF - Optical Materials
M1 - 111628
ER -