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標題:Electronic and atomic structure of TiO2 anatase spines on sea-urchin-like microspheres by x-ray absorption spectroscopy
學年108
學期2
出版(發表)日期2020/02/01
作品名稱Electronic and atomic structure of TiO2 anatase spines on sea-urchin-like microspheres by x-ray absorption spectroscopy
作品名稱(其他語言)
著者Hung-Wei Kuo; Chin-Jung Lin; He-Yi Do;Rui-YangWu; Chuan-Ming Tseng;Krishna Kumard; Chung-Li Dong; Chi-Liang Chena
單位
出版者
著錄名稱、卷期、頁數Applied Surface Science 502, 144297
摘要Titania mesoporous sea-urchin-like microspheres were successfully synthesized by two-step template-free hydrothermal method. The sea-urchin-like microspheres have TiO2 anatase phase spines. The size and shape remain unchanged with amorphous TiO2 in all the microsphere samples. Controlling the spines quantity of sea-urchin-like microspheres with different concentrations of NaBH4 precursor are expected to improve the photocatalytic ability. The 0.8 wt% NaBH4 precursor showed the highest photocatalytic activity in the degradation of acetaminophen. X-ray absorption spectroscopy results indicated that the surface spines have an anatase phase structure, slight lattice distortion as well as a variation in Ti 3d orbital orientation. The microspheres with different NaBH4 precursor concentration have a significant effect in the electronic structure and showed a strong correlation to the oxygen defect in the spines and local structural symmetry of TiO6 octahedra (Oh). More detailed spectral analysis in the unoccupied states above the Fermi level strongly points to a photon degradation. Since Ti3+ strongly influences the surface chemistry of anatase phase, the structure along with the oxygen defect and the Ti3+ ions in the spines are considered to have an essential role in the photocatalytic process of TiO2 for the photogenerated electrons and an indication of an increase in the photocatalytic activity.
關鍵字XAS Titania; Mesoporous; Photocatalyst
語言英文(美國)
ISSN1873-5584
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版
相關連結
SDGs
  • 氣候行動,可負擔的潔淨能源
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