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- Title
Highly enhanced photocatalytic degradation of dye rhodamine B on the biogenic hierarchical porous TiO<sub>2</sub>/SiO<sub>2</sub> with 1D/3D-chain.
- Authors
Chen, Hui; Zhao, Lei; He, Xuan; Huang, Zhaohui; Wang, Guanghui; Fang, Wei; Li, Weixin
- Abstract
A hybrid photocatalyst consisting of TiO2 and nonporous SiO2 (TiO2/CS-RH) is prepared by loading TiO2 sol on one-dimensional/three-dimensional chain (1D/3D-chain) which is synthesized from rice husk. The products are characterized by X-ray diffraction, N2-adsorption-desorption analysis and scanning electron microscopy. Meanwhile, the corresponding photocatalytic activity is evaluated by measuring the photocatalytic oxidation of rhodamine B (RhB). The results reveal that TiO2/CS-RH displays a hierarchical porous structure from micrometer to nanometer scale with high BET surface area (574.7-719.4 cm2/g). Meanwhile, the activity of TiO2/CS-RH for the photocatalytic degradation of RhB in aqueous slurry is significantly higher than that of the unsupported TiO2. The optimal TiO2 loaded on the support was two times and then treated at 600 °C for 120 min to complete the conversion of RhB. In contrast, the unsupported TiO2 photocatalyst could convert only 20% of RhB in the same irradiation time and condition.
- Subjects
PHOTOCATALYTIC oxidation; CATALYTIC oxidation; IRRADIATION; SCANNING electron microscopy; X-ray diffraction
- Publication
Clean Technologies & Environmental Policy, 2018, Vol 20, Issue 4, p887
- ISSN
1618-954X
- Publication type
Article
- DOI
10.1007/s10098-018-1508-4