화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.97, 326-336, May, 2021
DOI10.1016/j.jiec.2021.02.019  Export Citation
A novel synthesis of hexagonal cylinder-like ZnO with an excellent performance by a surfactant-free microemulsion-hydrothermal method
Xiaoyu Zhang, Ying Han, Wenjiao Liu, Ning Pan, Dejie Li†, and Jinling Chai†
  • College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, PR China
E-mail:,
A W/O surfactant-free microemulsion (SFME) template-hydrothermal method for the preparation of ZnO products was proposed. Using the SFME system containing hexane, propan-2-ol and water, hexagonal cylinder-like (twinning) ZnO microcrystals were synthesized. The XRD, SEM and TEM characterizations showed that the synthesized ZnO microcrystals have a hexagonal wurtzite structure. At hydrothermal temperatures of 120-140 ℃, hexagonal cylinder-like ZnO microcrystals were synthesized, whereas the hexagonal cylinder twinning ZnO microcrystals were obtained at 160 ℃. The growth mechanism of the ZnO microcrystals was also investigated. The EPR and XPS spectra of the synthesized ZnO products showed that there are oxygen vacancies on the ZnO surface. The photodegradation behavior of methylene blue (MB, 10 ppm) with a UV-Hg lamp (250 W) as the light source in ZnO aqueous suspension (0.3 g L-1) was investigated. The ZnO product synthesized at 140 ℃ can significantly photocatalyze the degradation of lower concentration MB solutions. After 35 min of irradiation, the photocatalytic decomposition rate reached 98.3%. It is hoped that this work could serve as an important stepping stone for establishing a novel hydrothermal method based on SFME system, therefore paving the way for other potential ideas on the application of SFME systems.
Keywords:Surfactant-free microemulsion;ZnO microcrystal;Microstructure;Photocatalytic activity;Photodegradation of methylene blue
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