Photocatalytic properties of CaTi2O5 via a facile additive-free aqueous strategy with different pH values

• 作者: Wei-Xia Dong Qi-Fu Bao X.-Y.Gu Hui-Juan Shen Peng-Yan Liu
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1746-1752
• 页数: 7页
• 语种: 英文

摘要

CaTi2O5 was selectively prepared by a solvothermal process without template and surfactant.The phase of the as-prepared samples was determined by X-ray diffraction(XRD).The microstructure was characterized by scanning electron microscopy(SEM)and transmission electron microscopy(TEM).Results found that pH values had a crucial effect on the crystal phase and shape evolu-tion of the samples.CaTi2O5 sample prepared at pH of 5.2 shows high efficient light harvesting,large surface area and crystallinity.Moreover,CaTi2O5 shuttle-like sample shows good photocatalytic activity against methyl orange due to its longer and thinner shuttle-like morphology and high crystallinity,enhanced light harvesting and large surface area.The photocatalytic rate of CaTi2O5 shuttle-like structure reaches 0.1988 min-1 for 25-min methyl orange degradation under the ultraviolet light irradiation and dis-plays an excellent photostability with a degradation effi-ciency of 0.1952 min-1 after four cycles.