<abstract xmlns="http://www.w3.org/1999/xhtml">β-Ni(OH)2/ZnO composite powders were successfully synthesized by hydrothermal method at 180 °C for 15 h whereas NiO/ZnO composite powders formed after the as-prepared powders were calcined at 800 °C for 1 h in air. The X-ray diffractometer (XRD), scanning electron microscope (SEM), UV-Vis spectrophotometer were used to characterize the phase, particle shape as well as size and optical properties, respectively. In this system, it was found that ZnO is a major phase while β-Ni(OH)2 and NiO are a minor phases. The altered particle shape of ZnO was influenced by addition of Ni(CH3COO)2·6H2O whereas the particle shape of the minor phase was changed due to the calcination process. The optical band gap decreased when the amount of minor phase increased. For photocatalytic study, it was found that 6 mol% <italic>β</italic>-Ni(OH)2/ZnO composite powders exhibited the best decolorization of methylene blue aqueous solution.</abstract>

β-Ni(OH)2/ZnO composite powders were successfully synthesized by hydrothermal method at 180 °C for 15 h whereas NiO/ZnO composite powders formed after the as-prepared powders were calcined at 800 °C for 1 h in air. The X-ray diffractometer (XRD), scanning electron microscope (SEM), UV-Vis spectrophotometer were used to characterize the phase, particle shape as well as size and optical properties, respectively. In this system, it was found that ZnO is a major phase while β-Ni(OH)2 and NiO are a minor phases. The altered particle shape of ZnO was influenced by addition of Ni(CH3COO)2·6H2O whereas the particle shape of the minor phase was changed due to the calcination process. The optical band gap decreased when the amount of minor phase increased. For photocatalytic study, it was found that 6 mol% β-Ni(OH)2/ZnO composite powders exhibited the best decolorization of methylene blue aqueous solution.

Dependence of defect concentration, optical and photocatalytic properties of <italic>β</italic>-Ni(OH)2/ZnO and NiO/ZnO composite powders on phase transformation

Department of Materials Science and Technology, Faculty of Science

Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science

Center of Excellence in Nanotechnology for Energy (CENE)

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Dependence of defect concentration, optical and photocatalytic properties of -Ni(OH)/ZnO and NiO/ZnO composite powders on phase transformation

β-Ni(OH)2/ZnO composite powders were successfully synthesized by hydrothermal method at 180 °C for 15 h whereas NiO/ZnO composite powders formed after the...

Dependence of defect concentration, optical and photocatalytic properties of β-Ni(OH)₂/ZnO and NiO/ZnO composite powders on phase transformation

Published Online: Oct 06, 2020

Page range: 219 - 227

Received: Mar 08, 2017

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0031

Keywords
ZnO, composites, chemical synthesis, defects, optical properties

© 2020 Sumetha Suwanboon et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Dependence of defect concentration, optical and photocatalytic properties of β-Ni(OH)2/ZnO and NiO/ZnO composite powders on phase transformation

Published Online: Oct 06, 2020

Page range: 219 - 227

Received: Mar 08, 2017

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0031

KeywordsZnO, composites, chemical synthesis, defects, optical properties

© 2020 Sumetha Suwanboon et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Dependence of defect concentration, optical and photocatalytic properties of β-Ni(OH)₂/ZnO and NiO/ZnO composite powders on phase transformation

Keywords
ZnO, composites, chemical synthesis, defects, optical properties