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Uniform monodisperse YbPO4 hollow microspheres have been successfully synthesized via the combination of a facile homogeneous precipitation approach, an ion-exchange process, and a calcination process for the first time.

Lu2O3:RE3+ (RE3+ = Eu3+, Tb3+, Ho3+) nanoparticles have been successfully synthesized by a facile homogeneous precipitation method with subsequent sintering process. The crystal structure, morphology and luminescence properties of the as-prepared samples have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), photoluminescence (PL) and cathodoluminescence (CL) spectra. Upon ultraviolet (UV) and low-voltage electron beam excitation, Lu2O3:RE3+ (RE3+ = Eu3+, Tb3+, Ho3+) nanoparticles show strong red (Eu3+,5D0 → 7F2), green (Tb3+,5D4 → 7F5), and green (Ho3+,5S2 → 5I8) emissions. They exhibit a good advantage of multicolor emissions in the visible region, and endow these kinds of materials with potential application in many fields, such as light display systems, optoelectronic devices and biological imaging.

In(OH) 3 microcubes have been successfully synthesised by a direct precipitation in solution at room temperature without using any surfactant or template. Furthermore, the In 2 O 3 microcubes were obtained through calcining the In(OH) 3 microcubes. The results show that the asprepared In(OH) 3 and In 2 O 3 products have a cube shape with a mean edge length of 190 and 155 nm, respectively. The self-assembly process via orientation attachment is proposed in order to explain the growth mechanism for the microcubes. Upon ultraviolet excitation, a broad blue photoluminescence emission with its maximum intensity centred at 466 nm is shown, which is due to the oxygen deficiencies in the In 2 O 3 microcubes. It endows these microcubes with potential application, such as liquid crystal devices, solar-energy conversion, optical and electric devices.