Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river water
Surface water contamination by various dyes and pigments is a global problem caused by rapid industry, particularly textile/dyeing. Bangladesh's export-oriented textile sector has exploded in recent decades, polluting local waterways significantly. In this study, nano-ZnO were prepared using su...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Arabian Journal of Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535222004609 |
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| author | Md. Shahidullah Mahmud Md. Jahir Raihan Md. Nazrul Islam Deepro Sanjid Qais Nilofar Asim Wan Azelee Wan Abu Bakar Md. Emran Quayum Md. Anwarul Islam Iqbal Mohammad Ibrahim Ismail Ahsan Habib |
| author_facet | Md. Shahidullah Mahmud Md. Jahir Raihan Md. Nazrul Islam Deepro Sanjid Qais Nilofar Asim Wan Azelee Wan Abu Bakar Md. Emran Quayum Md. Anwarul Islam Iqbal Mohammad Ibrahim Ismail Ahsan Habib |
| author_sort | Md. Shahidullah Mahmud |
| collection | DOAJ |
| description | Surface water contamination by various dyes and pigments is a global problem caused by rapid industry, particularly textile/dyeing. Bangladesh's export-oriented textile sector has exploded in recent decades, polluting local waterways significantly. In this study, nano-ZnO were prepared using surfactant-assisted sol–gel, hydrothermal and thermal methods. SEM, XRD, reflectance spectrophotometer, EDS and adsorption tests were used to characterize the synthesized nano-ZnO. BET isotherms were used to determine the surface area, pore volume, and pore size of the as-prepared nano-ZnO. The mixed surfactant assisted-sol gel method produced nanorod-ZnO, whereas the hydrothermal and/or thermal methods yielded clusters of needles ZnO, as proven by SEM images. XRD data revealed that the synthesized nanorod-ZnO had a mainly wurtzite crystalline structure and their size was estimated using the Scherrer equation to be about 23.90 nm. EDS spectra confirmed the synthesis of pure nanorod-ZnO. Using a UV–visible reflectance spectrophotometer, the band gap energy of the as-prepared nanorod-ZnO was found to be 3.35 eV. According to BET isotherms, the BET and Langmuir surface areas were 4 and 5.4 m2/g, respectively. Prior to analyzing photodegradation, the RB was adsorbing in the presence of various doses of the nanorod-ZnO in the dark, but no adsorption was observed. The photocatalytic activities of the synthesized nano-ZnO were compared to TiO2 (anatase) for the degradation of RB in an aqueous system under solar light, UV, fluorescence, and tungsten filament light irradiation. Nanorod-ZnO showed exceptional photocatalytic activity in degrading RB in an aqueous solution under solar light irradiation. The results suggest that 0.01 g/50 mL nanorod-ZnO with a solution pH of 7.8 is the best combination for complete degradation of 2.00 × 10-5 M RB under solar light irradiation. When nano-ZnO was exposed to light, the inhibiting effect of ethanol and/or tert-butanol on the degradation of RB confirmed the formation of mostly hydroxyl free radicals. The synthesized nanorod-ZnO shown substantial photocatalytic activity in the removal of pollutants from industrial effluents and contaminated river water under solar light irradiation. A mechanism of excellent photocatalytic activity of the nanorod-ZnO is discussed. |
| first_indexed | 2024-04-14T08:07:22Z |
| format | Article |
| id | doaj.art-952f25c4994e457f882e4952130a2ff7 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-04-14T08:07:22Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
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| series | Arabian Journal of Chemistry |
| spelling | doaj.art-952f25c4994e457f882e4952130a2ff72022-12-22T02:04:41ZengElsevierArabian Journal of Chemistry1878-53522022-10-011510104144Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river waterMd. Shahidullah Mahmud0Md. Jahir Raihan1Md. Nazrul Islam2Deepro Sanjid Qais3Nilofar Asim4Wan Azelee Wan Abu Bakar5Md. Emran Quayum6Md. Anwarul Islam7Iqbal Mohammad Ibrahim Ismail8Ahsan Habib9Department of Chemistry, University of Dhaka, Dhaka 1000, BangladeshDepartment of Chemistry, University of Dhaka, Dhaka 1000, BangladeshDepartment of Chemistry, University of Dhaka, Dhaka 1000, BangladeshDepartment of Chemistry, University of Dhaka, Dhaka 1000, BangladeshSolar Energy Research Institute, National University of Malaysia, 43600 Bangi, Selangor Darul Ehsan, MalaysiaDepartment of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, MalaysiaDepartment of Chemistry, University of Dhaka, Dhaka 1000, BangladeshDepartment of Chemistry, University of Dhaka, Dhaka 1000, BangladeshThe Center of Excellence in Environmental Studies and Department of Chemistry, King Abdulaziz University, Jeddah 21589, Saudi ArabiaDepartment of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh; Corresponding author.Surface water contamination by various dyes and pigments is a global problem caused by rapid industry, particularly textile/dyeing. Bangladesh's export-oriented textile sector has exploded in recent decades, polluting local waterways significantly. In this study, nano-ZnO were prepared using surfactant-assisted sol–gel, hydrothermal and thermal methods. SEM, XRD, reflectance spectrophotometer, EDS and adsorption tests were used to characterize the synthesized nano-ZnO. BET isotherms were used to determine the surface area, pore volume, and pore size of the as-prepared nano-ZnO. The mixed surfactant assisted-sol gel method produced nanorod-ZnO, whereas the hydrothermal and/or thermal methods yielded clusters of needles ZnO, as proven by SEM images. XRD data revealed that the synthesized nanorod-ZnO had a mainly wurtzite crystalline structure and their size was estimated using the Scherrer equation to be about 23.90 nm. EDS spectra confirmed the synthesis of pure nanorod-ZnO. Using a UV–visible reflectance spectrophotometer, the band gap energy of the as-prepared nanorod-ZnO was found to be 3.35 eV. According to BET isotherms, the BET and Langmuir surface areas were 4 and 5.4 m2/g, respectively. Prior to analyzing photodegradation, the RB was adsorbing in the presence of various doses of the nanorod-ZnO in the dark, but no adsorption was observed. The photocatalytic activities of the synthesized nano-ZnO were compared to TiO2 (anatase) for the degradation of RB in an aqueous system under solar light, UV, fluorescence, and tungsten filament light irradiation. Nanorod-ZnO showed exceptional photocatalytic activity in degrading RB in an aqueous solution under solar light irradiation. The results suggest that 0.01 g/50 mL nanorod-ZnO with a solution pH of 7.8 is the best combination for complete degradation of 2.00 × 10-5 M RB under solar light irradiation. When nano-ZnO was exposed to light, the inhibiting effect of ethanol and/or tert-butanol on the degradation of RB confirmed the formation of mostly hydroxyl free radicals. The synthesized nanorod-ZnO shown substantial photocatalytic activity in the removal of pollutants from industrial effluents and contaminated river water under solar light irradiation. A mechanism of excellent photocatalytic activity of the nanorod-ZnO is discussed.http://www.sciencedirect.com/science/article/pii/S1878535222004609Nanorod-ZnOSolar lightPhotocatalysisDefectsIndustrial effluentsContaminated river water |
| spellingShingle | Md. Shahidullah Mahmud Md. Jahir Raihan Md. Nazrul Islam Deepro Sanjid Qais Nilofar Asim Wan Azelee Wan Abu Bakar Md. Emran Quayum Md. Anwarul Islam Iqbal Mohammad Ibrahim Ismail Ahsan Habib Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river water Arabian Journal of Chemistry Nanorod-ZnO Solar light Photocatalysis Defects Industrial effluents Contaminated river water |
| title | Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river water |
| title_full | Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river water |
| title_fullStr | Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river water |
| title_full_unstemmed | Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river water |
| title_short | Synthesis of solar light driven nanorod-zinc oxide for degradation of rhodamine B, industrial effluent and contaminated river water |
| title_sort | synthesis of solar light driven nanorod zinc oxide for degradation of rhodamine b industrial effluent and contaminated river water |
| topic | Nanorod-ZnO Solar light Photocatalysis Defects Industrial effluents Contaminated river water |
| url | http://www.sciencedirect.com/science/article/pii/S1878535222004609 |
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