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- Title
Synthesis of Hollow B-SiO2@CaTiO3 Nanocomposites and Their Photocatalytic Performance in Ammonia Nitrogen Degradation.
- Authors
Lu, Xiaoqing; Zhou, Qin; Yin, Hengbo; Wang, Aili; Meng, Fanwen
- Abstract
Hollow B-SiO2@CaTiO3 nanocomposites were hydrothermally synthesized at a mild reaction temperature of 120 °C using calcium chloride and titanium (IV) isopropoxide as the starting materials and hollow B-SiO2 microspheres as the supports. CaTiO3 nanoparticles are anchored at the surfaces of hollow B-SiO2 microspheres through the formation of Ti–O–B and Ti–O–Si bonds. The interaction between the CaTiO3 nanoparticles and hollow B-SiO2 microspheres enlarged the band gap of CaTiO3 nanoparticles, giving a higher photocatalytic activity in ammonia nitrogen degradation at a lower catalyst loading and a wider range of ammonia nitrogen concentration. When the hollow B-SiO2@CaTiO3 (5wt%CaTiO3) photocatalyst was hydrothermally synthesized at 120 °C for 12 h, and the photocatalytic degradation reaction of ammonia nitrogen (50 mg L−1) in an aqueous solution was carried out under the simulated solar light irradiation at 25 °C for 4 h; the degradation extent of ammonium nitrogen reached 91%.
- Subjects
AMMONIA; CALCIUM chloride; TITANIUM chlorides; NITROGEN; AQUEOUS solutions; MICROSPHERES
- Publication
Water, Air & Soil Pollution, 2020, Vol 231, Issue 3, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-020-04471-8