化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (12) : 196-200.

科学研究

低温制备{001}TiO₂及光催化性能研究

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Low temperature preparation of {001}TiO₂ and its photocatalytic performance

Hou Chentao, Zhu Jiaming

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Received		Published
2018-06-25		2019-12-20
Issue Date	Revised Date
2020-01-03	2018-06-25

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摘要

在低温下通过溶胶-凝胶法成功制备出球状{001}TiO₂光催化剂,在300W氙灯模拟太阳光下,以10mg/L的亚甲基蓝为目标污染物来评价该催化剂的活性。通过X射线衍射(XRD)、拉曼(Raman)光谱、紫外-可见吸收光谱(UV-Vis)、扫描电镜(SEM),以及荧光(PL)对其进行了表征分析。结果显示,随着HF含量的增多,{001}TiO₂晶体的结晶程度越高,可见光响应增强,但禁带宽度几乎不变,光生电子与空穴复合率降低。当HF用量为12mL,光照时间为120min时,{001}TiO₂光催化剂对亚甲基蓝的降解率可达到97%。

Abstract

Spherical {001}TiO₂ was successfully prepared by sol-gel method at low temperature.Under the 300W xenon lamp simulated sunlight,10mg/L methylene blue as the target pollutant was used to evaluate the activity of the catalyst.The materials were characterized by X-ray diffraction (XRD),raman spectra(Raman),ultraviolet visible absorption spectroscopy (UV-Vis),scanning electron microscopy (SEM) and fluorescence (PL).The results showed that with the increase of the amount of hydrofluoric acid,the higher the crystallinity of the crystal,the visible light response was enhanced,but the width of the band gap was almost constant,and the recombination of photogenerated electrons and holes was weakened.When the amount of HF was 12mL,the degradation rate of methylene blue can reach 97% within 2.5h.

关键词

低温 / {001}TiO₂ / 光催化 / 亚甲基蓝

Key words

low temperature / {001}TiO₂ / photocatalysis / methylene blue

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低温制备{001}TiO₂及光催化性能研究[J]. 化工新型材料, 2019, 47(12): 196-200 DOI:

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