Facile synthesis of SrTiO3 hollow microspheres built as assembly of nanocubes and their associated photocatalytic activity

KTaO3-based nanocomposites for air treatment

“…Preparation method of single semiconductor based on previously reported procedures [13,[15][16][17][18]. Cubic KTaO 3 structure was synthesized based on modified synthesis reported by Zou et al [14].…”

Template-Free Fabrication of Bi2WO6 Hierarchical Hollow Microspheres with Visible-Light-Driven Photocatalytic Activity

“…We can see that our prepared hierarchical hollow Bi 2 WO 6 microspheres assembled by thin nanoplates (V EG :V EA = 1:2) showed higher visible-light-driven photocatalytic performance than that of Bi 2 WO 6 flower-like microspheres (V EG :V EA = 1:5), and of irregular plate-like aggregates (V EG :V EA = 0:1) on RhB degradation, realizing 95% degradation of RhB under visible-light illumination only within 40 min, and the hierarchical hollow Bi 2 WO 6 microspheres also indicate much higher photocatalytic performance than commercial nano TiO 2 (anatase, 5-10 nm) under visible-light irradiation, while the blank test showed the photodegradation efficiency was only 5% within 40 min, demonstrating RhB degradation is extraordinarily slow without Bi 2 WO 6 photocatalyst only under visible-light illumination. The empty structure of as prepared hollow spheres may promote both the outer and inner surfaces of the photocatalyst to contact with the objective organic contamination more easily [29], and light harvesting efficiency can be effectively enhanced in view of special microstructures of the hollow sphere [30], thus the visible-light-driven photocatalytic performance of highly hierarchical hollow Bi 2 WO 6 microspheres on degradation of RhB contaminants in aqueous solution was raised. However, we investigated the photocatalytic performance of Bi 2 WO 6 hollow microspheres under UV-light (λ = 254 nm) and the photodegradation efficiency was 26% within 40 min (see Figure S4), it tells us that Bi 2 WO 6 hollow microspheres show much weaker photocatalytic activity under UV-light irradiation.…”

“…Therefore, from the above analysis, we may conclude that the photocatalytic activity from Bi 2 WO 6 hollow microspheres will display best under visible-light illumination with wavelength of λ > 420 nm. inner surfaces of the photocatalyst to contact with the objective organic contamination more easily [29], and light harvesting efficiency can be effectively enhanced in view of special microstructures of the hollow sphere [30], thus the visible-light-driven photocatalytic performance of highly hierarchical hollow Bi2WO6 microspheres on degradation of RhB contaminants in aqueous solution was raised. However, we investigated the photocatalytic performance of Bi2WO6 hollow microspheres under UV-light (λ = 254 nm) and the photodegradation efficiency was 26% within 40 min (see Figure S4), it tells us that Bi2WO6 hollow microspheres show much weaker photocatalytic activity under UV-light irradiation.…”

Low temperature hydrothermal synthesis of SrTiO3 nanoparticles without alkali and their effective photocatalytic activity

“…Hydrothermal method and derived solvothermal method have been used to effectively synthesize SrTiO 3 NPs due to the advantages such as relatively simple setup, low temperature, controllable morphology and size of the product, etc. [18][19][20].…”

“…Dong et al [23] synthesized porous SrTiO 3 spheres by a hydrothermal method in 10 M NaOH solution at 150 ℃. Zheng et al [18] synthesized SrTiO 3 hollow microspheres by an alkali hydrothermal method at 180 ℃ in 1 M NaOH solution. Wu et al [24] employed KOH as mineralizer to fabricate SrTiO 3 and Mn-doped SrTiO 3 nanocubes through a hydrothermal method at 150 ℃ at pH = 13.0.…”