Alkali-free synthesis of a novel heterostructured CeO2-TiO2 nanocomposite with high performance to reduce Cr(VI) under visible light

作者：Jiang, Hualin^*; Li, Menglin; Liu, Jun; Li, Xueqin; Tian, Lei; Chen, Pinghua

来源：Ceramics International, 2018, 44(3): 2709-2717.

DOI：10.1016/j.ceramint.2017.10.225

• Cr(VI) treatment
• CeO2
• TiO2
• Photocatalysis
• Nanocomposite

In this study, a novel CeO2-TiO2 nanocomposite denoted as CeO2-3TiO(2) was successfully synthesized via a facile one pot hydro-thermal method without alkali. It exhibits high photocatalytic reduction reactivity toward Cr(VI) under visible light. The photocatalytic reactivity of CeO2-3TiO(2) is 18 times higher than that of pure CeO2, 28 times higher than pure TiO2, 15 times higher than the sample of simply mixed CeO2 and TiO2. The solution with Cr(VI) initial concentration of 2780 ppb can be fast photoreduced by CeO2-3TiO(2) in 60 min under visible light to meet the criterion of U.S. Environmental protection Agency. Characterization results indicate CeO2-3TiO(2) has the good crystal form of heterojunction structure, narrow pore size distribution, narrow energy gap and high photogenerated electron-hole separation efficiency. Based on the experimental results, a speculated photo catalytic mechanism was proposed.

• 出版日期2018-2-15
• 单位南昌航空大学