Lanthanide‐Doped Photoluminescence Hollow Structures: Recent Advances and Applications

Abstract

Lanthanide‐doped nanomaterials have attracted significant attention for their preeminent properties and widespread applications. Due to the unique characteristic, the lanthanide‐doped photoluminescence materials with hollow structures may provide advantages including enhanced light harvesting, intensified electric field density, improved luminescent property, and larger drug loading capacity. Herein, the synthesis, properties, and applications of lanthanide‐doped photoluminescence hollow structures (LPHSs) are comprehensively reviewed. First, different strategies for the engineered synthesis of LPHSs are described in detail, which contain hard, soft, self‐templating methods and other techniques. Thereafter, the relationship between their structure features and photoluminescence properties is discussed. Then, niche applications including biomedicines, bioimaging, therapy, and energy storage/conversion are focused on and superiorities of LPHSs for these applications are particularly highlighted. Finally, keen insights into the challenges and personal prospects for the future development of the LPHSs are provided.

Tuning morphology, surface, and nanocrystallinity of rare earth vanadates by one-pot colloidal conversion of hydroxycarbonates

“…37 Hollow nanoparticles show additional advantages of low volumetric mass density, increased defect density, and improved porosity, which is highly attractive for chemical sensing applications depending on the permeability of the particles against the dispersing medium. 38 RE hydroxycarbonates (RECO 3 OH xH 2 O) 39 have been described as efficient sacrificial precursors for REVO 4 particles, 6,31,[40][41][42] but these conversions generally require application of hydrothermal conditions and rather long reaction times. We recently demonstrated 3 Two-step conversions of hydroxycarbonates into vanadates were also performed for comparison.…”

Plant‐Based Structures as an Opportunity to Engineer Optical Functions in Next‐Generation Light Management

“…Lanthanide-doped nanomaterials have attracted considerable interest in various fields due to their exceptional properties, including their ladder-like energy level configurations (4f electronic orbitals) and unpaired electrons, which result in highperformance activators for PL. [178][179][180] Trivalent lanthanide ions (Ln 3+ ) possess outstanding spectroscopic properties, such as sharp emission peaks (pure color emission), high luminescence efficiency, and long lifetimes. [181,182] Xue et al [163] developed a transparent cellulose nanopaper functionalized with lanthanide complexes (Ytterbium "Yb" and neodymium "Nd") and UV filters (β-diketone) for UV blocking applications.…”

Enhanced photoluminescence of hollow CaWO4 microspheres: the fast fabrication, structural manipulation, and exploration of the growth mechanism

“…[9][10][11][12][13][14][15][16][17][18][19] In particular, CaWO 4 with a scheelite structure is identified as a host luminophore, which is noticed due to the following merits: (1) the intrinsic blue-green emission of CaWO 4 materials at room temperature is within the wavelengths of 240-537 nm; 20,21 (2) emission of other lights of various colors: incorporating different types of rare-earth ions (Ln 3+ ) into the host CaWO 4 framework may alter the possibility of luminescence emission; [22][23][24][25][26] (3) CaWO 4 materials possess stable physicochemical properties, high luminous efficiency and economical value. 22,[27][28][29] CaWO 4 has a scheelite-type tetragonal structure with the space-group symmetry I4 1 /a, in which Ca and W cations are surrounded by 8-oxygen anions and 4-oxygen anions to form [ CaO 8 ] and [WO 4 ] clusters, respectively. [30][31][32][33][34] For enhancing the luminescence properties, widespread modifications of the CaWO 4 microstructure involve the distortion of [WO 4 ], the modifications of strong O-W-O bond lengths, and the change of dihedral angles, resulting from the symmetry breakage of the clusters, as mentioned above.…”