Artículos de revistas
Straightforward High-Pressure Synthesis and Characterization of Indium-Based Thiospinels: Photocatalytic Potential for Hydrogen Production
Fecha
2016-04-04Registro en:
Falcon, Horacio; Tartaj, Pedro; Vaquero, Fernando; Navarro, Rufino M.; García Fierro, José Luis; et al.; Straightforward High-Pressure Synthesis and Characterization of Indium-Based Thiospinels: Photocatalytic Potential for Hydrogen Production; Wiley VCH Verlag; European Journal of Inorganic Chemistry; 2016; 10; 4-4-2016; 1558-1565
1434-1948
1099-0682
CONICET Digital
CONICET
Autor
Falcon, Horacio
Tartaj, Pedro
Vaquero, Fernando
Navarro, Rufino M.
García Fierro, José Luis
Bolletta, Juan Pablo
de Paoli, Juan Martin
Carbonio, Raul Ernesto
Fernández Díaz, María Teresa
Alonso, José Antonio
Resumen
Ternary chalcogenides (AB2X4) based on the spinel structure are gaining a great deal of attention because of the possibility of tuning their magnetic and optoelectronic properties not only by changing chemical composition but also by altering their degree of inversion. Here we report a rapid high-pressure synthetic method for the synthesis of MIn2S4 powders starting from commercially available solid sulfides. We prove the versatility of our method by reporting the synthesis of six members of the MIn2S4 family (M = Mn, Fe, Co, Ni, Zn, and Cd) under high-pressure conditions (3.5 GPa); these compounds show complete to moderate degrees of inversion. Furthermore, this family covers a spectral region that includes visible band gaps. Interestingly, the structural refinement carried out by X-ray and neutron diffraction allows one to establish positive correlations between the gap and different parameters, including the degree of inversion. Finally, as a proof-of-concept, these ternary chalcogenides show moderate photocatalytic hydrogen production from aqueous solutions.