Citation: WU Guang-Li, ZHAO Xiao-Hua, LI Meng, LI Zhen-Zhen, LI Cai-Zhu, LOU Xiang-Dong. Controllable Synthesis of Hierarchical Structure ZnO Photocatalysts with Different Morphologies via Sol-Gel Assisted Hydrothermal Method[J]. Chinese Journal of Inorganic Chemistry, ;2015, (1): 61-68. doi: 10.11862/CJIC.2015.004 shu

Controllable Synthesis of Hierarchical Structure ZnO Photocatalysts with Different Morphologies via Sol-Gel Assisted Hydrothermal Method

1.
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China

Corresponding author: LOU Xiang-Dong,
Received Date: 17 June 2014
Available Online: 26 September 2014
Fund Project: 国家自然科学基金(No.21073055)资助项目 (No.21073055)

Hierarchical structure ZnO samples with different morphologies were synthesized by sol-gel assisted hydrothermal method, using Zn(NO₃)₂·6H₂O, citric acid and NaOH as raw materials. Nanosheets flower-like ZnO, nanorods flower-like ZnO and spind-like ZnO microstructures could be synthesized only by controlling the time of hydrothermal reaction. The as-prepared samples were characterized by XRD, SEM, UV-Vis, DRS, photoluminescence (PL) and low temperature nitrogen adsorption-desorption. The formation mechanism of different morphologies of ZnO hierarchical structures was proposed. The photocatalytic activities of the samples were evaluated by the degradation of Reactive Blue 14 (KGL) under UV irradiation. The results demonstrated that different morphologies of ZnO samples all showed good photocatalytic performance, with the degradation degree of KGL exceeding 78% after 120 min. But the sample prepared at 120 ℃ for 4 h exhibited superior photocatalytic activity to other ZnO samples, and the degradation rate of KGL can reach 99%. It might be attributed to the morphology, larger specific surface area, more oxygen surface defect and surface polarity.
- sol-gel assisted hydrothermal;ZnO;morphology;hierarchical structure;photocatalytic
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沈阳化工大学材料科学与工程学院沈阳 110142