Work

Ternary Ni−Sb−Te Nanoparticles by Co‐Reduction in a One‐Pot Microwave‐Assisted Polyol Process

Year: 2024

Type: article

Abstract: Utilizing the polyol process to produce ternary or multinary phases is a challenge due to the different redox potentials of the components. We succeeded in synthesizing compounds in the composition range Ni4−δ(SbxTe1−x)6 (−0.20≤δ≤0.36, 0.13≤x≤0.3) by heating a basic ethylene glycol solution containing nickel(II) acetate, antimony(III) acetate, and ammonium tellurate(VI) in a microwave at 280 °C for 25 min without adding auxiliary reducing agents. The products consist of thin nano‐platelets, which can be transformed into larger crystals by annealing. Single crystal X‐ray diffraction revealed a new structure type for the composition Ni4−δ(Sb0.25Te0.75)6 (x=0.25) in the space group P m1 with a=3.897(1) Å and c=15.701(1) Å. The triple superstructure of the NiAs type is due to a complex concentration profile of the Ni atoms in the octahedral voids. The trigonal TlCdS2 type is found for lower Sb contents (0≤x≤0.20), while for higher Sb contents (x≥0.28) the hexagonal Ni2SbTe2 type is adopted, which both are ordering variants of the NiAs type. Ni4−δ(Sb0.25Te0.75)6 is paramagnetic and exhibits poor metallic conductivity in the temperature range 6 K≤T≤300 K.

Source: European Journal of Inorganic Chemistry

DOI: 10.1002/ejic.202400525

Authors: Yiran Wang, Eduardo Carrillo‐Aravena, Maria Roslova, Thomas Doert, Michael Ruck

Institutions: Technische Universität Dresden, Complexity, Topology and Dynamics in Quantum Matter, Leibniz Institute for Solid State and Materials Research, Max Planck Institute for Chemical Physics of Solids

Language: English

Topic: Crystal Structures and Properties

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,860

Funder: Deutsche Forschungsgemeinschaft