期刊
RSC ADVANCES
卷 5, 期 114, 页码 93969-93978出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra16163k
关键词
-
资金
- startup foundation for introducing talent of Nanjing University of Information Science & Technology (NUIST) [2241131301102]
Titanium species were immobilized on alpha-ZrP nanosheets (ZrP-Ti) using a modified post-grafting method. The obtained ZrP-Ti composites were characterized via Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), ultraviolet-visible (UV-vis) absorption spectroscopy, photoluminescence spectroscopy (PL), and scanning electron microscopy (SEM). Titanium species in the form of TiO2-x clusters with an average particle size of 2-5 nm were grafted on alpha-ZrP nanosheets via chemical bonding with P element. These ZrP-Ti composites could be well dispersed in polar solvents to ensure that the TiO2-x clusters bonded on both faces of the nanosheets were accessible. The ZrP-Ti composites presented enhanced visible-light absorption properties compared with that of pure TiO2. These features allowed them to exhibit better photocatalytic activities for the photodegradation of methylene blue (MB) under solar irradiation. The TiO2-x clusters tended to aggregate into anatase phase TiO2 when the molar ratio of P/Ti exceeded 1 : 1, and this reversed the advantage in their photocatalytic activities. The best MB degradation efficiency of 100% with the apparent rate constant of 0.054 min(-1) was achieved over the ZrP-Ti composite with the P/Ti molar ratio of 1 : 1.
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