Strategy to Enhance the Luminescence of Lanthanide Ions Doped MgWO4 Nanosheets through Incorporation of Carbon Dots

Jingbin Huang; Wei Lu; Jia Wang; Qingfeng Li; Boshi Tian; Chunyang Li; Zhenling Wang; Lin Jin; Jianhua Hao

doi:10.1021/acs.inorgchem.8b01592

Strategy to Enhance the Luminescence of Lanthanide Ions Doped MgWO₄ Nanosheets through Incorporation of Carbon Dots

Inorg Chem. 2018 Jul 16;57(14):8662-8672. doi: 10.1021/acs.inorgchem.8b01592. Epub 2018 Jun 25.

Authors

Jingbin Huang^{1

2}, Wei Lu, Jia Wang², Qingfeng Li², Boshi Tian², Chunyang Li², Zhenling Wang^{1

2}, Lin Jin², Jianhua Hao

Affiliations

¹ The College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , PR China.
² The Key Laboratory of Rare Earth Functional Materials and Applications; Henan Key Laboratory of Rare Earth Functional Materials , Zhoukou Normal University , Zhoukou 466001 , PR China.

PMID: 29939723
DOI: 10.1021/acs.inorgchem.8b01592

Abstract

Highly fluorescent nanomaterials have shown great potential application in optics area. However, further improving their fluorescence properties especially for nanomaterials still remains a challenge. Specifically, luminescence of lanthanide (Ln) ions doped two-dimensional (2D) nanosheets is seldom studied. Herein, MgWO₄:Ln³⁺ (Ln = Eu, Tb) nanosheets were successfully synthesized via a simple hydrothermal method, and the luminescence properties of these nanosheets are obviously improved through incorporation of fluorescent carbon dots (CDs) onto the surface of MgWO₄:Ln³⁺ (CDs@MgWO₄:Ln³⁺) nanosheets. The obtained MgWO₄:Ln³⁺ samples have a 2D nanosheet morphology with triclinic phase, and the morphology and phase structure can be maintained after incorporating CDs onto the nanosheets' surface. Under the excitation of UV light, the obtained MgWO₄:Ln³⁺ nanosheets exhibit the characteristic emission of the doping ions, and the emission intensity of CDs@MgWO₄:Eu³⁺ and CDs@MgWO₄:Tb³⁺ nanosheets increases 2- and 7-fold compared to the corresponding samples without incorporation of CDs, respectively. This luminescent enhancement mechanism might be due to the capturing electrons by CDs and energy transfer from CDs to luminescent Ln³⁺. The fluorescence enhancement through incorporation of CDs provides a simple and environment-friendly strategy for further improving luminescence property of other lanthanide ions doped nanomaterials.