Novel eco-friendly synthesis of neodymium doped zinc silicate phosphor based waste glass ceramic: structural, thermal and luminescence properties

Abstract

Novel eco-friendly synthesis of neodymium doped zinc silicate phosphor based waste glass ceramic: structural, thermal and luminescence properties ABSTRACT A novel Nd 3+ doped Zn 2 SiO 4 (at Nd 2 wt%) phosphor have been synthesized at different sintering temperature (600-1000 °C) by low cost solid state route. For the first time, the ecofriendly based glass ceramic phosphor were produced by utilizing waste soda lime silica glass (SLS) and ZnO as precursor. The obtained samples were investigated in terms of thermal properties by DSC technique and the results showed a possible crystallization peak around 620 °C. The crystalline phase formation by XRD revealed α-willemite at lower temperature of 800 °C. The analysis by FTIR exhibit the existence of ZnO 4 and SiO 4 structural bonding. The microstructure analysis by FESEM revealed the evolvement from irregular blocks to crystalline structure. EDX analysis confirmed the presence of main element contained in the samples. UV-Vis spectroscopy shows absorption peaks from the ground 4 I 9/2 state to various excited energy level of Nd 3+ ion in 4f 3 configuration. Under diode laser excitation of 800 nm photoluminescence, the samples shows possible upconversion emissions in the blue, green, orange and red region. Possible mechanism of upconversion were also studied proposing the suitability of Nd 3+ :Zn 2 SiO 4 based waste glass ceramic for solid state laser.

Valorization of Rice Husk and Straw Agriculture Wastes of Eastern Saudi Arabia: Production of Bio-Based Silica, Lignocellulose, and Activated Carbon

“…The spectrum is dominated by three ideal distinct peaks of silica environment at 443.5, 801.4, 1080 cm −1 that indicated the symmetric vibrations of bending motion of Si–O–Si and O–Si–O groups; the symmetric stretching vibrations mode of Si–O–Si or vibrational of ring structures and the bridging oxygen atom between tetrahedral units; and the stretching vibration mode of Si–O–H asymmetric surface group, respectively. In addition, a slight small shoulder at 1200 cm −1 indicated the amorphous skeleton of silica [ 39 ].…”

Synthesis, characterization, and photoluminescence property of Nd–TUD‐1

“…In addition, a slight small shoulder at 1240 cm −1 indicated the amorphous skeleton of silica, as noted in aprevious report. [ 34,35 ] After doping of Nd in Nd‐5, a clear shoulder appeared at 580 cm −1 that indicated the presence of Si–Nd–O. [ 36 ] The intensity of the Si–O–H peak at 1100 cm –1 decreased, whichindicated the creation of a Nd–O–H surface group.…”

“…Interestingly, the presence of extra peaks with high loading of Nd +3 at 430, 474, 513, 526, 626, and 682 nm could be related a high absorption coefficient, which increased with increasing levels of Nd +3 as Nd 2 O 3 nanoparticles. [ 35,39 ]…”