Welcome to JOURNAL OF SYNTHETIC CRYSTALS! Today is Share:

JOURNAL OF SYNTHETIC CRYSTALS ›› 2022, Vol. 51 ›› Issue (1): 139-147.

• Research Articles • Previous Articles     Next Articles

Hydrothermal Synthesis and Visible Light Photocatalytic Properties of Self-Doped SnO2 Microspheres

LIU Quan1, ZHAN Hongquan1, YUAN Menglei1, LI Fu1, XIE Zhipeng2, WANG Chang'an2   

  1. 1. School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, China;
    2. School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2021-08-26 Online:2022-01-15 Published:2022-02-09

Abstract: In this study, the microspheres assembled from SnO2 nanocrystals with abundant oxygen vacancies were synthesized by hydrothermal method using citric acid as a chelating agent and controlling the molar ratio of Sn4+/Sn2+. The SnO2 nano-microspheres were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectroscopy. The results show that under the acidic hydrothermal conditions and the chelating effect of citric acid, the tin dioxide nanocrystals aggregate to form microspheres; at a Sn4+/Sn2+ molar ratio of 3:7, the size of the microspheres is the smallest and the overall dispersion is good. The presence of the oxygen vacancies will extend the light absorption range to visible light; thus, the sample shows a strong visible light catalytic efficiency and complete degradation of methyl orange within 8 min.

Key words: SnO2, oxygen vacancy, photocatalysis, hydrothermal method, self doping, visible light

CLC Number: