TY - JOUR
T1 - Experimental and theoretical DFT+D investigations regarding to various morphology of cuprous oxide nanoparticles
T2 - Growth mechanism of ionic liquid-assisted synthesis and photocatalytic activities
AU - Qi, Kezhen
AU - Qi, Hanshu
AU - Yang, Jiaqin
AU - Wang, Gui Chang
AU - Selvaraj, Rengaraj
AU - Zheng, Wenjun
PY - 2017/9/15
Y1 - 2017/9/15
N2 - Under assistance of ionic liquid, the Cu2O crystal was successfully synthesized by a simple solution-phase method with several morphologies, including octahedrals, truncated octahedrals, facet-etched octahedrals, particle-coated octahedrals and aggregated spheres. The morphology of Cu2O crystals can easily be modified by tuning the adding amounts of ionic liquid 1-ethyl-3-methylimidazolium bromide. A possible growth mechanism for the crystal products can be suggested based on the DFT+D calculation and experiments. Under visible-light irradiation (λ > 420 nm), the obtained Cu2O samples show an outstanding performance during photodegrading methylene blue (MB) dye. The higher photocatalytic activity for MB photodegradation by the Cu2O facet-etched octahedrals comparing to octahedrals can be attributed to the formation of surface heterojunction between (1 0 0) and (1 1 1) facets. Therefore, the ionic liquid-assisted solution-phase syntheses would be potentially useful in the fields of catalyst production for photodegrading hazardous pollutants.
AB - Under assistance of ionic liquid, the Cu2O crystal was successfully synthesized by a simple solution-phase method with several morphologies, including octahedrals, truncated octahedrals, facet-etched octahedrals, particle-coated octahedrals and aggregated spheres. The morphology of Cu2O crystals can easily be modified by tuning the adding amounts of ionic liquid 1-ethyl-3-methylimidazolium bromide. A possible growth mechanism for the crystal products can be suggested based on the DFT+D calculation and experiments. Under visible-light irradiation (λ > 420 nm), the obtained Cu2O samples show an outstanding performance during photodegrading methylene blue (MB) dye. The higher photocatalytic activity for MB photodegradation by the Cu2O facet-etched octahedrals comparing to octahedrals can be attributed to the formation of surface heterojunction between (1 0 0) and (1 1 1) facets. Therefore, the ionic liquid-assisted solution-phase syntheses would be potentially useful in the fields of catalyst production for photodegrading hazardous pollutants.
KW - Cuprous oxide
KW - DFT calculation
KW - Ionic liquid
KW - Morphology control
KW - Photocatalytic activity
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U2 - 10.1016/j.cej.2017.04.113
DO - 10.1016/j.cej.2017.04.113
M3 - Article
AN - SCOPUS:85019205167
SN - 1385-8947
VL - 324
SP - 347
EP - 357
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -