Synthesis, characterization, theoretical investigation, and properties of monoclinic-phase InWO4 hollow nanospheres
- 106 Downloads
As a newly discovered member of the tungstate family, InWO4 hollow nanospheres with a monoclinic wolframite structure were synthesized successfully. The crystal phase of InWO4 was investigated via a combination of CASTEP geometric optimization and experimental simulation. InWO4 has a space group of P2/c with two InWO4 formula units per unit cell. The optimized cell dimensions are a = 5.16 Å, b = 5.97 Å, and c = 5.23 Å, with α = 90°, β = 92.11°, γ = 90°, giving a unit cell volume of 161.10 Å3, which is consistent with the experimental measurements. More importantly, InWO4 was a promising host material for different Ln3+ (Ln = Eu and Yb/Er) ions. For InWO4:Yb3+/Er3+ excited at 980 nm, transitions from the 4G11/2 (384 nm), 2H9/2 (411 nm), and 4F7/2 (487 nm) levels to the ground state (4I15/2) of Er3+ were observed. In addition to the aforementioned properties, the InWO4 hollow nanospheres can be used to improve the performance of dye-sensitized solar cells, which is chiefly attributed to theirlight scattering.
KeywordsInWO4 rare earth hollow nanospheres luminescence
Unable to display preview. Download preview PDF.
This work was supported by the National Natural Science Foundation of China (No. 21471050) and the Innovative Project of Postgraduate of Heilongjiang University (No. YJSCX2017-52HLJU).
- Li, F.; Wang, X. D.; Xia, Z. G.; Pan, C. F.; Liu, Q. L. Photoluminescence tuning in stretchable PDMS film grafted doped core/multishell quantum dots for anticounterfeiting. Adv. Mater. 2017, 27, 1700051.Google Scholar
- Zhang, Y.; Zhang, B.; Peng, X.; Liu, L.; Dong, S.; Lin, L. P.; Chen, S.; Meng, S. X.; Feng, Y. Q. Preparation of dye-sensitized solar cells with high photocurrent and photovoltage by using mesoporous titanium dioxide particles as photoanode material. Nano Res. 2015, 8, 3830–3841.CrossRefGoogle Scholar
- Nazeerudin, M. K.; Kay, A.; Rodicioet, I.; Humphry-Baker, R.; Müller, E.; Liska, P.; Vlachopoulos, N.; Grätzel, M. Conversion of light to electricity by cis-X 2bis(2, 2′-bipyridyl-4, 4′-dicarboxylate)ruthenium (II) charge-transfer sensitizers (X=Cl–, Br–, I–, CN–, and SCN–) on nanocrystalline titanium dioxide electrodes. J. Am. Chem. Soc. 1993, 115, 6382–6390.CrossRefGoogle Scholar