Straightforward High‐Pressure Synthesis and Characterization of Indium‐Based Thiospinels: Photocatalytic Potential for Hydrogen Production. Issue 10 (4th March 2016)

• Record Type: Journal Article
• Authors: Falcón, Horacio; Tartaj, Pedro; Vaquero, Fernando; Navarro, Rufino M.; Fierro, Jose Luis G.; Bolletta, Juan P.; de Paoli, Juan M.; Carbonio, Raul E.; Fernández‐Díaz, Maria Teresa; Alonso, Jose Antonio
• Is Part Of: European journal of inorganic chemistry. Issue 10(2016)
• Page Start: 1558
• Page End: 1565
• Publication Date: 2016-03-04
• Subjects: Synthetic methods -- High‐pressure chemistry -- Photocatalysis -- Dihydrogen -- Chalcogens; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201501390
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: Ternary chalcogenides (AB2 X4 ) 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 MIn2 S4 powders starting from commercially available solid sulfides. We prove the versatility of our method by reporting the synthesis of six members of the MIn2 S4 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. Abstract : We describe a high‐pressure synthetic method for MIn2 S4 powders starting from commercially available solid sulfides (M = Mn, Fe, Co, Ni, Zn, and Cd) that show variable inversion degrees. This family covers a spectral region that includes visible band gaps. As a proof‐of‐concept, these ternary chalcogenides show moderate photocatalytic hydrogen production from aqueous solutions.