期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 858, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.157726
关键词
Fe doped TiO2; Sol-gel; Photocatalytic; F-127; K-30
资金
- National Natural Science Foundation of China [51772038]
- Natural Science Foundation of Liaoning Province, China [2019-ZD-0091/096/097/114]
- Project of Department of Education of Liaoning Province, China [JDL2017002/05, JDL2019020]
- High-level personnel innovation support program [2017RQ133]
In this study, 0.3 wt% Fe doped TiO2 nanoparticles were prepared using different types of additives, F-127 and K-30, and their effects on crystal structure and photocatalytic efficiency were investigated. It was found that F-127 inhibited the phase transformation, while K-30 promoted it, leading to differences in photocatalytic degradation under UV and visible light irradiation.
0.3 wt% Fe doped TiO2 nanoparticles were fabricated by the modified sol-gel method using tetra-butyl titanate, HNO3, Fe(NO3)(3)center dot 9H(2)O, absolute ethanol and additives, namely F-127 and polyvinyl pyrrolidone (K-30) as raw materials, respectively. The samples were characterized by TG-DTA, XRD, FTIR, UV-Vis, TEM, HRTEM, SAED, EDS and BET to explore the effects of additive type on the thermal effect, crystal structure, surface composition, energy band gap (E-g), and photocatalytic performance of samples calcined at different temperatures. Fe doped TiO2 nanoparticles prepared using F-127 had the inhibiting effect on the anatase to rutile phase transformation, however, K-30 acted as a promoter to facilitate this transformation. The photocatalytic efficiency of Fe doped TiO2 photocatalyst using F-127 and K-30 as additives exhibited higher photocatalytic degradation mass of methyl orange than the samples prepared using additive-free under irradiation of UV and visible light respectively, which was mainly resulted from the hydroxyl groups (OH-) absorbed on the grain surface, decreased E-g and the mixed crystal structure of anatase and rutile. (C) 2020 Elsevier B.V. All rights reserved.
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