Details

Autor(en) / Beteiligte

• Hong, Sangki
• Cheng, Ye
• Hariyani, Shruti
• Li, Jingzhe
• Doughty, Rachel M
• Mantravadi, Aishwarya
• Adeyemi, Adedoyin N
• Smith, Emily A
• Brgoch, Jakoah
• Osterloh, Frank E
• Zaikina, Julia V

Titel

The Deep Eutectic Solvent Precipitation Synthesis of Metastable Zn 4 V 2 O 9

Ist Teil von

• Inorganic chemistry, 2022-01, Vol.61 (1), p.154-169

Ort / Verlag

United States

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A precipitation method involving a deep eutectic solvent (DES)─a mixture of hydrogen bond donor and acceptor─is used to synthesize a ternary metal oxide. Without toxic reagents, precipitates consisting of Zn (OH) V O · H O and Zn (OH) (CO ) are obtained by simply introducing deionized H O to the DES solution containing dissolved ZnO and V O . Manipulation of the synthetic conditions demonstrates high tunability in the size/morphology of the two-dimensional nanosheets precipitated during the dynamic equilibrium process. According to differential scanning calorimetry and high-temperature powder X-ray diffraction, Zn V O and ZnO obtained by the annealing of the precipitate are intermediates in the reaction pathway toward metastable Zn V O . Intimate mixing of the metal precursors achieved by the precipitation method allows access to the metastable zinc-rich vanadate with unusually rapid heat treatment. The UV-vis and surface photovoltage spectra reveal the presence of sub-band gap states, stemming from the reduced vanadium (V ) center. Photoelectrochemical measurements confirm weak photoanodic currents for water and methanol oxidation. For the first time, this work shows the synthesis of a metastable oxide with the DES-precipitation route and provides insight into the structure-property relationship of the zinc-rich vanadate.