Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous Solution
Herein, we report a micro-plasma assisted solvothermal synthesis and characterization of zinc oxide nanosheets (ZnO-NSs) and their application for the removal of Cr<sup>6+</sup> ion from aqueous solution. The morphological investigations by scanning electron microscopy (SEM) and transmis...
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MDPI AG
2020-12-01
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| author | Pawan Kumar Meenu Saini Maninder Singh Nidhi Chhillar Brijnandan S. Dehiya Kamal Kishor Fahad A. Alharthi Nabil Al-Zaqri Abdulaziz Ali Alghamdi |
| author_facet | Pawan Kumar Meenu Saini Maninder Singh Nidhi Chhillar Brijnandan S. Dehiya Kamal Kishor Fahad A. Alharthi Nabil Al-Zaqri Abdulaziz Ali Alghamdi |
| author_sort | Pawan Kumar |
| collection | DOAJ |
| description | Herein, we report a micro-plasma assisted solvothermal synthesis and characterization of zinc oxide nanosheets (ZnO-NSs) and their application for the removal of Cr<sup>6+</sup> ion from aqueous solution. The morphological investigations by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) confirmed the high-density growth of nanosheets with the typical sizes in the range of 145.8–320.25 nm. The typical surface area of the synthesized ZnO-NSs, observed by Brunauer-Emmett-Teller (BET), was found to be 948 m<sup>2</sup>/g. The synthesized ZnO-NSs were used as efficient absorbent for the removal of Cr<sup>6+</sup> ion from aqueous solution. Various parameters such as pH, contact time, amount of adsorbate and adsorbent on the removal efficiency of Cr<sup>6+</sup> ion was optimized and presented in this paper. At optimized conditions, the highest value for removal was 87.1% at pH = 2 while the calculated maximum adsorption capacity was ~87.37 mg/g. The adsorption isotherm data were found to be best fitted to Temkin adsorption isotherm and the adsorption process followed the pseudo-first-order kinetics. Furthermore, the toxicity of ZnO-NSs were also examined against fibroblast cells, which show favorable results and proved that it can be used for wastewater treatment. |
| first_indexed | 2024-03-10T13:51:50Z |
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| issn | 2073-4352 |
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| last_indexed | 2024-03-10T13:51:50Z |
| publishDate | 2020-12-01 |
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| series | Crystals |
| spelling | doaj.art-e990dfad7d3243f0afe353dee91b42cc2023-11-21T02:05:17ZengMDPI AGCrystals2073-43522020-12-01111210.3390/cryst11010002Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous SolutionPawan Kumar0Meenu Saini1Maninder Singh2Nidhi Chhillar3Brijnandan S. Dehiya4Kamal Kishor5Fahad A. Alharthi6Nabil Al-Zaqri7Abdulaziz Ali Alghamdi8Department of Materials Science and Nanotechnology, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, IndiaDepartment of Materials Science and Nanotechnology, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, IndiaDepartment of Chemical Engineering, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, IndiaUniversity School of Environment Management, Guru Gobind Singh Indraprastha University, Sec 16 C Dwarka, Delhi 110078, IndiaDepartment of Materials Science and Nanotechnology, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, IndiaDepartment of Applied Physics, Delhi Technical University, Main Bawana Road, New Delhi 110042, IndiaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaHerein, we report a micro-plasma assisted solvothermal synthesis and characterization of zinc oxide nanosheets (ZnO-NSs) and their application for the removal of Cr<sup>6+</sup> ion from aqueous solution. The morphological investigations by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) confirmed the high-density growth of nanosheets with the typical sizes in the range of 145.8–320.25 nm. The typical surface area of the synthesized ZnO-NSs, observed by Brunauer-Emmett-Teller (BET), was found to be 948 m<sup>2</sup>/g. The synthesized ZnO-NSs were used as efficient absorbent for the removal of Cr<sup>6+</sup> ion from aqueous solution. Various parameters such as pH, contact time, amount of adsorbate and adsorbent on the removal efficiency of Cr<sup>6+</sup> ion was optimized and presented in this paper. At optimized conditions, the highest value for removal was 87.1% at pH = 2 while the calculated maximum adsorption capacity was ~87.37 mg/g. The adsorption isotherm data were found to be best fitted to Temkin adsorption isotherm and the adsorption process followed the pseudo-first-order kinetics. Furthermore, the toxicity of ZnO-NSs were also examined against fibroblast cells, which show favorable results and proved that it can be used for wastewater treatment.https://www.mdpi.com/2073-4352/11/1/2ZnO nanosheetsCr(VI) ionadsorption isothermsfibroblast cells |
| spellingShingle | Pawan Kumar Meenu Saini Maninder Singh Nidhi Chhillar Brijnandan S. Dehiya Kamal Kishor Fahad A. Alharthi Nabil Al-Zaqri Abdulaziz Ali Alghamdi Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous Solution Crystals ZnO nanosheets Cr(VI) ion adsorption isotherms fibroblast cells |
| title | Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous Solution |
| title_full | Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous Solution |
| title_fullStr | Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous Solution |
| title_full_unstemmed | Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous Solution |
| title_short | Micro-Plasma Assisted Synthesis of ZnO Nanosheets for the Efficient Removal of Cr<sup>6+</sup> from the Aqueous Solution |
| title_sort | micro plasma assisted synthesis of zno nanosheets for the efficient removal of cr sup 6 sup from the aqueous solution |
| topic | ZnO nanosheets Cr(VI) ion adsorption isotherms fibroblast cells |
| url | https://www.mdpi.com/2073-4352/11/1/2 |
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