18 research outputs found
SOLARIS National Synchrotron Radiation Centre in Krakow, Poland
The SOLARIS synchrotron located in Krakow, Poland, is a third-generation light source operating at medium electron energy. The first synchrotron light was observed in 2015, and the consequent development of infrastructure lead to the first users’ experiments at soft X-ray energies in 2018. Presently, SOLARIS expands its operation towards hard X-rays with continuous developments of the beamlines and concurrent infrastructure. In the following, we will summarize the SOLARIS synchrotron design, and describe the beamlines and research infrastructure together with the main performance parameters, upgrade, and development plans
Impact of Synthesis Parameters upon the Electronic Structure in PVD-Deposited CdxZn1–xO Composite Thin Films: An XPS-XANES Investigation
Unraveling the Role of Sodium Thiosulfate in Copper Sulfide Synthesis
Our study reveals that the green copper sulfide synthesis
from
sodium thiosulfate and copper salts is a two-step process, where an
intermediate product acts as a sacrificial template. The effect of
various synthesis parameters, including the temperature applied in
both reaction steps, solvent composition (water and ethylene glycol
in ratios of 1:0, 3:1, 1:1, and 1:3), and copper precursor (CuSO4, Cu(NO3)2, CuCl2), on the
morphology of the intermediate and final products was investigated
in detail. By adjusting the ethylene glycol content, it was possible
to obtain a hexagonal rod-like intermediate product with varying dimensions,
which decomposed into tubular copper sulfide at room temperature.
In aqueous solvents with a low precursor concentration (<0.10 M),
the solubility limit of the rod-like sacrificial template was not
exceeded, leading to the direct precipitation of CuS from the solution
attaining eventually the spherical shape. Comprehensive structural
analysis unveiled that the intermediate product was composed of sodium,
copper(I), thiosulfate anion, and hydroxyl group, suggesting a Na2[Cu3(S2O3)2(OH)]
formula. Furthermore, X-ray diffraction (XRD) ex situ time-resolved studies indicated that this compound decomposed to
chalcocite (Cu2S) and subsequently to covellite (CuS) in
the course of the reaction