Solvent-Free Synthesis of Quaternary Metal Sulfide Nanoparticles Derived from Thiourea
KAUST DepartmentCatalysis for Energy Conversion (CatEC)
Chemical Science Program
Imaging and Characterization Core Lab
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Online Publication Date2017-08-09
Print Publication Date2018-01
Permanent link to this recordhttp://hdl.handle.net/10754/625730
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AbstractThe synthesis of metal sulfide (MS) materials with sizes in the sub-10 nm regime often requires capping agents with long hydrocarbon chains that affect their structures and properties. Herein, this study presents a molten-state synthesis method for a series of transition-MS nanoparticles using thiourea as a reactive precursor without capping agents. This study also reports the synthesis of MS with single metals (Fe, Co, Ni, Cu, and Zn) and quaternary CuGa2In3S8 using the same synthesis protocol. Thiourea first melts to form a molten-state condition to serve as the reaction medium at a relatively low temperature (<200 °C), followed by its thermal decomposition to induce a reaction with the metal precursor to form different MS. This synthesis protocol, owing to its dynamic characteristics, involves the formation of a variety of organic carbon nitride polymeric complexes around the MS particles. Dynamic nuclear polarization surface-enhanced nuclear magnetic resonance spectroscopy is effective to identify the polymeric compositions and structures as well as their interactions with the MS. These results provided thorough structural descriptions of the MS nanoparticles surrounded by the carbon nitride species derived from thiourea, which may find various applications, including photocatalytic water splitting.
CitationBhunia MK, Abou-Hamad E, Anjum DH, Gurinov A, Takanabe K (2017) Solvent-Free Synthesis of Quaternary Metal Sulfide Nanoparticles Derived from Thiourea. Particle & Particle Systems Characterization: 1700183. Available: http://dx.doi.org/10.1002/ppsc.201700183.
SponsorsThe research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). The authors are grateful to Dr. Ahmed Ziani at KAUST for assistance with the SEM observations.