Synthesis of the aqueous soluble mesoporous silica functionalized luminescent La(OH)3:Pr core-shell nanospheres

被引:1
作者
Ansari, Anees A. A. [1 ]
Khan, M. A. Majeed [1 ]
机构
[1] King Saud Univ, Coll Sci, Riyadh 11451, Saudi Arabia
关键词
La2O3; Pr3+; Mesoporous silica; Raman; Band gap; Luminescence spectra; UP-CONVERSION LUMINESCENT; PHOTOLUMINESCENCE PROPERTIES; PHYSICOCHEMICAL PROPERTIES; HYDROTHERMAL SYNTHESIS; ENHANCED LUMINESCENCE; SURFACE MODIFICATION; NANOPARTICLES; PHOSPHOR; PR; MICROSPHERES;
D O I
10.1007/s11696-023-02862-9
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
La2O3:Pr3+ nanospheres (core-NSs) were successfully prepared by a urea-supported low-temperature thermal decomposition process. X-ray diffraction pattern (XRD), Fourier transform infrared (FTIR), Raman, UV-visible, and photoluminescence methods were applied for the characterization of the as-prepared silica surface functionalized luminescent core and La(OH)(3):Pr@SiO2@mSiO(2) (core/shell) NSs. XRD profile shows the reduction in diffraction peak intensities after silica layer growth over the core-NSs. TEM micrographs display the obvious difference in core and core-shell structure with an estimated grain size of about 56, and 180 nm of the core, and core-shell NSs, respectively. FTIR spectra exhibited the well-resolved IR peaks of the silica layer at a lower frequency range. Raman spectra show the prominent active vibrational modes at lower frequency regions. UV-visible spectrums exhibited that the band edge was significantly shifted to a higher wavelength after silica layer deposition over the luminescent core-NSs in both H2O and ethanol solvents. Absorption spectra revealed good aqueous dispersibility and colloidal performance in aqueous solvents. The optical band gap was calculated from the absorption spectra in both solvents. Pr3+-ion-doped La2O3 and silica functionalized core/shell NSs can be efficiently irradiated from the 443 nm (H-3(4) -> P-3(2)) excitation wavelength to emit multi-color sharp luminescence transitions in the visible region. The emission efficiency and colloidal dispersibility of the core-shell NSs may be useful tools in the photonic-based biomedical window.
引用
收藏
页码:5293 / 5303
页数:11
相关论文
共 69 条
[1]  
Ansari AA, 2010, J SEMICOND, V31, DOI [10.1088/1674-4926/31/5/053001, 10.1088/1674-4926/31/3/033001]
[2]   Coordination chemistry of the host matrices with dopant luminescent Ln3+ ion and their impact on luminescent properties [J].
Ansari, Anees A. ;
Muthumareeswaran, M. R. ;
Lv, Ruichan .
COORDINATION CHEMISTRY REVIEWS, 2022, 466
[3]   Functionalized upconversion nanoparticles: New strategy towards FRET-based luminescence bio-sensing [J].
Ansari, Anees A. ;
Thakur, Vijay K. ;
Chen, Guanying .
COORDINATION CHEMISTRY REVIEWS, 2021, 436
[4]   Synthesis, optical properties and toxic potentiality of photoluminescent lanthanum oxide nanospheres [J].
Ansari, Anees A. ;
Siddiqui, Maqsood A. ;
Khan, Aslam ;
Ahmad, N. ;
Al-Khedhairy, Abdulaziz A. .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2020, 607
[5]   Optically active neodymium hydroxide surface-functionalized mesoporous silica micro-cocoons for biomedical applications [J].
Ansari, Anees A. ;
Khan, Aslam ;
Alam, Manawwer ;
Siddiqui, Maqsood A. ;
Ahmad, Naushad ;
Alkhedhairy, Abdulaziz A. .
COLLOIDS AND SURFACES B-BIOINTERFACES, 2020, 189
[6]   Toxicity response of highly colloidal, bioactive, monodisperse SiO2@Pr (OH)3 hollow microspheres [J].
Ansari, Anees A. ;
Khan, Aslam ;
Siddiqui, Maqsood A. ;
Ahmad, Naushad ;
Al-Khedhairy, Abdulaziz A. .
COLLOIDS AND SURFACES B-BIOINTERFACES, 2019, 182
[7]   Aqueous dispersible green luminescent yttrium oxide:terbium microspheres with nanosilica shell coating [J].
Ansari, Anees A. ;
Ahmad, Naushad ;
Labis, Joselito P. ;
El-Toni, Ahmed Mohamed ;
Khan, Aslam .
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2019, 211 :348-355
[8]   Impact of LaF3 and silica shell formation on the crystal, optical and photo-luminescence properties of LaF3:Ce/Tb nanoparticles [J].
Ansari, Anees A. ;
Rai, Monika ;
Rai, S. B. .
MATERIALS CHEMISTRY FRONTIERS, 2017, 1 (04) :727-734
[9]   Role of surface modification on physicochemical properties of luminescent YPO4:Tb nanorods [J].
Ansari, Anees A. .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2017, 529 :286-291
[10]   Photochemical studies of monodispersed YPO4:Eu microspheres: The role of surface modification on structural and luminescence properties [J].
Ansari, Anees A. .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2017, 343 :126-132