Controllable synthesis of multi-morphological SrWO4:Ln3+ (Ln = Eu, Tb) hierarchical structures and their luminescence properties. Issue 42 (10th October 2019)

• Record Type: Journal Article
• Authors: Huang, Jingbin; Lu, Wei; Yue, Dan; Wang, Yanyan; Wang, Zhenling; Jin, Lin; Zhang, Lianzhong; Li, Zhongjun
• Is Part Of: CrystEngComm. Volume 21:Issue 42(2019)
• Page Start: 6482
• Page End: 6490
• Publication Date: 2019-10-10
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce01111k
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Multi-morphological SrWO4 :Ln 3+ hierarchical structures including dumbbell-like, nanosheets, rice-like, peanut-like, etc. could be controllably synthesized through readily altering reaction conditions. Abstract : Multi-morphological Ln 3+ (Ln = Eu, Tb) doped SrWO4 hierarchical structures were successfully synthesized via a hydrothermal method. The phase structure, morphology and luminescence properties of the as-prepared samples were characterized by XRD, SEM, TEM, PL spectroscopy and lifetime measurements. The results indicate that the alteration of synthesis conditions has almost no effect on the phase structure, but has a prominent effect on the morphology of the obtained samples, such as the molar ratio of Sr 2+ to WO4 2− from 1 : 3 to 6 : 1 (split spheres, dumbbell-like, rod-like, nanosheets), addition of Na3 C6 H5 O7 ·2H2 O from 0.1 to 0.5 g (microspheres, rice-like), addition of Na2 EDTA·2H2 O from 0.01 to 0.3 g (spheres, split spheres, peanut-like, drum-like, ellipsoidal morphology), and the doping concentration of Eu 3+ ions from 1% to 16% (dumbbell-like, rod-like). The as-synthesized SrWO4 :Ln 3+ (Ln = Eu, Tb) samples with various morphologies have an identical scheelite structure and exhibit the characteristic visible emission of the dopant rare earth ions under the excitation of UV light.