Preparation, Characterization and Photocatalytic Activity of La-Doped Zinc Oxide Nanoparticles

Materials

卷:12

BuiDuc Nguyen¹  AnhT. T. Duong¹  LoanT. T. Nguyen¹  LanT. H. Nguyen¹  Nguyen Quang Hai²  VietHa Chu²  LongGiang Bach³  TrinhDuy Nguyen³ 

[1] Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen City 24000, Vietnam;

[2] Faculty of Physics, Thai Nguyen University of Education, Thai Nguyen City 24000, Vietnam;

[3] NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 70000, Vietnam;

关键词: La-doped zinc oxide;    nanoparticles;    gel combustion;    optical property;    photocatalytic activity;   

DOI  :  10.3390/ma12081195

来源: DOAJ

【 摘 要 】

Lanthanum (La)-doped zinc oxide nanoparticles were synthesized with different La concentrations by employing a gel combustion method using poly(vinyl alcohol) (PVA). The as-synthesized photocatalysts were characterized using various techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), photoluminescence (PL) spectroscopy, and UV–visible absorption spectroscopy. The average size of ZnO nanoparticles decreased from 34.3 to 10.3 nm with increasing concentrations of La, and the band gap, as evaluated by linear fitting, decreased from 3.10 to 2.78 eV. Additionally, it was found that the photocatalytic activity of doped samples, as investigated by using methyl orange dye under visible lights, improved in response to the increase in La concentration. The decomposition of methyl orange reached 85.86% after 150 min in visible light using La0.1Zn0.9O as the photocatalyst.

【 授权许可】

Unknown