Abstract
This work demonstrated that mesoporous TiO2 (meso-TiO2) with controllable mesoporous and crystalline structures can be facilely prepared by using poly (ethylene glycol) (PEG) as structure-directing (SD) agent and peroxotitanic acid (PTA) as precursor. Meso-TiO2 with high specific surface area (157 m2∙g-1), pore volume (0.45 cm3∙g-1) and large mesopore size of 13.9 nm can be obtained after calcination at 450°C. Such meso-TiO2 also shows relatively high thermal stability. BET surface area still reaches 114 m2∙g-1 after calcination at 550°C. In the synthesis and calcination process, PEG that plays multiple and important roles in delivering thermally stable and tunable mesoporous and crystalline structures shows to be a suitable low-cost SD agent for the controllable preparation of nanocrystalline meso-TiO2. The photocatalytic activity tests show that both high surface area and bi-crystallinity of obtained meso-TiO2 are important in enhancing the performance in photo-decomposing Rhodamine B in water.
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Nguyen, D., Wang, W., Long, H. et al. Facile and controllable preparation of mesoporous TiO2 using poly(ethylene glycol) as structure-directing agent and peroxotitanic acid as precursor. Front. Mater. Sci. 10, 405–412 (2016). https://doi.org/10.1007/s11706-016-0352-x
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DOI: https://doi.org/10.1007/s11706-016-0352-x