Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from Wastewater
This study attempted to harness the dual benefit of adsorption and photocatalytic degradation for efficiently removing a model anionic azo dye, Orange G, from an aqueous solution. For this purpose, a series of bifunctional nanohybrids containing different proportions of naturally occurring biopolyme...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/6/10/304 |
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| author | Mohammad Rahat Hossain Taslim Ur Rashid Nadira Parvin Lata Shaikat Chandra Dey Mithun Sarker Sayed Md. Shamsuddin |
| author_facet | Mohammad Rahat Hossain Taslim Ur Rashid Nadira Parvin Lata Shaikat Chandra Dey Mithun Sarker Sayed Md. Shamsuddin |
| author_sort | Mohammad Rahat Hossain |
| collection | DOAJ |
| description | This study attempted to harness the dual benefit of adsorption and photocatalytic degradation for efficiently removing a model anionic azo dye, Orange G, from an aqueous solution. For this purpose, a series of bifunctional nanohybrids containing different proportions of naturally occurring biopolymer chitosan and ternary photocatalyst made of kaolinite, TiO<sub>2</sub>, and ZnO were prepared through the dissolution of chitosan in acid and subsequent deposition on ternary photocatalyst. The characterization through Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectrum (EDS) have confirmed the successful fabrication of nanohybrids from TiO<sub>2</sub> and chitosan. The adsorptive separation of Orange G from the aqueous solution and subsequent degradation under solar irradiation was thoroughly studied by recording the λ<sub>max</sub> value of dye in the ultraviolet–visible (UV-Vis) spectrophotometer at various operating conditions of pH, dye concentration, contact time, and compositional variation. The nanohybrid (TP<sub>0.75</sub>CS<sub>0.25</sub>) fabricated from 75% ternary photocatalyst (<i>w</i>/<i>w</i>) and 25% chitosan (<i>w</i>/<i>w</i>) removed 97.4% Orange G within 110 min at pH 2.5 and 10 mg/L dye concentration. The relative contribution of chitosan and ternary composite on dye removal was understood by comparing the experimental results in the dark and sunlight. Recyclability experiments showed the suitability of the nanohybrid for long-term repeated applications. Equilibrium experimental data showed a better correlation with the Langmuir isotherm and pseudo-second-order kinetic model. The rapid and nearly complete removal capacity, long-term reusability, and simple fabrication technique make this novel nanohybrid a promising advanced material for removing hazardous azo dyes from industrial effluents. |
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| format | Article |
| id | doaj.art-15e98d43d5ae498fa6f6b35db8ca62e0 |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-09T20:02:33Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Composites Science |
| spelling | doaj.art-15e98d43d5ae498fa6f6b35db8ca62e02023-11-24T00:41:09ZengMDPI AGJournal of Composites Science2504-477X2022-10-0161030410.3390/jcs6100304Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from WastewaterMohammad Rahat Hossain0Taslim Ur Rashid1Nadira Parvin Lata2Shaikat Chandra Dey3Mithun Sarker4Sayed Md. Shamsuddin5Department of Chemistry, University of Illinois Chicago, Chicago, IL 60607, USADepartment of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka 1000, BangladeshDepartment of Chemistry, University of Illinois Chicago, Chicago, IL 60607, USADepartment of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka 1000, BangladeshDepartment of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka 1000, BangladeshDepartment of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka 1000, BangladeshThis study attempted to harness the dual benefit of adsorption and photocatalytic degradation for efficiently removing a model anionic azo dye, Orange G, from an aqueous solution. For this purpose, a series of bifunctional nanohybrids containing different proportions of naturally occurring biopolymer chitosan and ternary photocatalyst made of kaolinite, TiO<sub>2</sub>, and ZnO were prepared through the dissolution of chitosan in acid and subsequent deposition on ternary photocatalyst. The characterization through Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectrum (EDS) have confirmed the successful fabrication of nanohybrids from TiO<sub>2</sub> and chitosan. The adsorptive separation of Orange G from the aqueous solution and subsequent degradation under solar irradiation was thoroughly studied by recording the λ<sub>max</sub> value of dye in the ultraviolet–visible (UV-Vis) spectrophotometer at various operating conditions of pH, dye concentration, contact time, and compositional variation. The nanohybrid (TP<sub>0.75</sub>CS<sub>0.25</sub>) fabricated from 75% ternary photocatalyst (<i>w</i>/<i>w</i>) and 25% chitosan (<i>w</i>/<i>w</i>) removed 97.4% Orange G within 110 min at pH 2.5 and 10 mg/L dye concentration. The relative contribution of chitosan and ternary composite on dye removal was understood by comparing the experimental results in the dark and sunlight. Recyclability experiments showed the suitability of the nanohybrid for long-term repeated applications. Equilibrium experimental data showed a better correlation with the Langmuir isotherm and pseudo-second-order kinetic model. The rapid and nearly complete removal capacity, long-term reusability, and simple fabrication technique make this novel nanohybrid a promising advanced material for removing hazardous azo dyes from industrial effluents.https://www.mdpi.com/2504-477X/6/10/304chitosanadsorbentphotocatalystdye removalwastewater treatment |
| spellingShingle | Mohammad Rahat Hossain Taslim Ur Rashid Nadira Parvin Lata Shaikat Chandra Dey Mithun Sarker Sayed Md. Shamsuddin Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from Wastewater Journal of Composites Science chitosan adsorbent photocatalyst dye removal wastewater treatment |
| title | Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from Wastewater |
| title_full | Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from Wastewater |
| title_fullStr | Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from Wastewater |
| title_full_unstemmed | Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from Wastewater |
| title_short | Fabrication of Novel Nanohybrid Material for the Removal of Azo Dyes from Wastewater |
| title_sort | fabrication of novel nanohybrid material for the removal of azo dyes from wastewater |
| topic | chitosan adsorbent photocatalyst dye removal wastewater treatment |
| url | https://www.mdpi.com/2504-477X/6/10/304 |
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