Recyclable Fe3O4/hydroxyapatite composite nanoparticles for photocatalytic applications

Controlling lateral nanomixing and velocity profile of dilute ferrofluid capillary flows in uniform stationary, oscillating and rotating magnetic fields

“…Control of the dispersion phenomenon in a microfluidic context may be considered as a prime example. The fact that suspended functionalized MNPs find extensive applications in a variety of disciplines [59][60][61] will broaden the scope of potential application of this technique. Moreover, this approach opens up a new trend in experimental methods to shed light on the interaction between magnetically excited MNPs and flow field at the nanoscale as shown in our recent applications of this technique [62][63][64][65].…”

A comparative study of hydroxyapatite nanoparticles synthesized by different routes

“…The characteristic bands of internal phosphate (PO 4 3-) mode were assignments in both spectra: the band at 472 cm -1 was assigned to ν 2 (OPO) bending mode; the presence of two characteristic bands around 568 and 601 cm -1 correspond to ν 4 (OPO) bending mode; the 960 cm -1 band in the spectra was assigned to ν 1 (PO) symmetric stretching and the doublet in the range 1100-1000 cm -1 was assigned to ν 3 (PO) antisymmetric stretching mode. These bands indicate the characteristic molecular structures of the polyhedrons of PO 4 3-in the apatite lattice. 17 Further, at 3572 cm -1 the main hydroxyl vibration ν (OH -) was observed in both spectra; in HAn1 spectrum a band at 635 cm -1 was observed, which is attributed to OH -groups (δ), 17 yet is not observed in the HAn2 spectrum.…”

“…[1][2][3] In addition, HAn has been developed to improve adsorption and photocatalytic decomposition activity against toxic metals, bacteria, viruses and other biohazardous substances. 4,5 In recent years, several chemistry-based processing routes have been reported for preparing HAn powders. Nanoparticles with several morphologies have been synthesized by means of solid-state reaction, the emulsion technique, sol-gel and the hydrothermal method.…”

Biocomposites and hybrid biomaterials based on calcium orthophosphates

“…1089,1090 Interestingly, though, Fe 3 O 4 /HA composites possess photocatalytic properties. 1003,1004 Various biocomposites of calcium orthophosphates with metals and alloys have been fabricated as well. 540,928,967,997,[1028][1029][1030][1031][1032][1033][1034][1035][1036][1037][1038][1039][1040][1041][1042][1043][1044][1045] For example, an HA-based biocomposite reinforced with 20 vol.% of Ti particles was fabricated by hot pressing.…”