Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dye
Photocatalytic treatment of wastewater utilizing oxides of metals as photocatalysts has merged a subject of major concern. The photocatalytic efficiency can be increased by the separation of electrons and holes formed by the absorption of photons. The development of heterojunction between two semico...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016822006433 |
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| author | Muhammad Saeed Karma Albalawi Iltaf Khan Nadia Akram Ibrahim H.A. Abd El-Rahim Sadeq K. Alhag Ahmed Ezzat Ahmed Faiza |
| author_facet | Muhammad Saeed Karma Albalawi Iltaf Khan Nadia Akram Ibrahim H.A. Abd El-Rahim Sadeq K. Alhag Ahmed Ezzat Ahmed Faiza |
| author_sort | Muhammad Saeed |
| collection | DOAJ |
| description | Photocatalytic treatment of wastewater utilizing oxides of metals as photocatalysts has merged a subject of major concern. The photocatalytic efficiency can be increased by the separation of electrons and holes formed by the absorption of photons. The development of heterojunction between two semiconductors is one of the methods used for the separation of photo-induced electrons and holes. Herein, we report a p-n NiO-ZnO heterojunction photocatalyst for efficient photodegradation of crystal violet dye. The homogeneous precipitation method was used for the synthesis of p-n NiO-ZnO in this study. The synthesized heterojunction was characterized by XRD, SEM, EDX, and TGA techniques. The aqueous solution of crystal violet dye was used as model wastewater for the evaluation of the photocatalytic efficiency of as-synthesized material. The photocatalytic performance of p-n NiO-ZnO for photodegradation of crystal violet dye was significantly higher than pristine NiO and ZnO. The photocatalytic activities of NiO, ZnO and NiO-ZnO were found in the ratio of 1: 3.8: 7.8, respectively. Similarly, the ratio of photocatalytic activities of 5% NiO-ZnO, 10% NiO-ZnO, and 15% NiO-ZnO was 1: 1.2: 0.8, respectively. The degradation data was analyzed for kinetics analyses using the Langmuir-Hinshelwood mechanism. |
| first_indexed | 2024-04-10T15:06:30Z |
| format | Article |
| id | doaj.art-854ced49f62b4d279b07e24f1c830b60 |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-04-10T15:06:30Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-854ced49f62b4d279b07e24f1c830b602023-02-15T04:26:59ZengElsevierAlexandria Engineering Journal1110-01682023-02-0165561574Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dyeMuhammad Saeed0Karma Albalawi1Iltaf Khan2Nadia Akram3Ibrahim H.A. Abd El-Rahim4Sadeq K. Alhag5Ahmed Ezzat Ahmed6 Faiza7Department of Chemistry, Government College University Faisalabad Pakistan; Corresponding author.Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk, 71491, Saudi ArabiaSchool of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, PR ChinaDepartment of Chemistry, Government College University Faisalabad PakistanDepartment of Environmental and Health Research, Umm Al-Qura University, P.O. Box 6287, 21955 Makkah Al-Mukaramah, Saudi ArabiaBiology Department, College of Science and Arts, King Khalid University, Muhayil, Saudi ArabiaDepartment of Biology, College of Science, King Khalid University, 61413 Abha, Saudi Arabia; Department of Theriogenology, Faculty of Veterinary Medicine, South Valley University, 83523 Qena, EgyptDepartment of Chemistry, Government College University Faisalabad PakistanPhotocatalytic treatment of wastewater utilizing oxides of metals as photocatalysts has merged a subject of major concern. The photocatalytic efficiency can be increased by the separation of electrons and holes formed by the absorption of photons. The development of heterojunction between two semiconductors is one of the methods used for the separation of photo-induced electrons and holes. Herein, we report a p-n NiO-ZnO heterojunction photocatalyst for efficient photodegradation of crystal violet dye. The homogeneous precipitation method was used for the synthesis of p-n NiO-ZnO in this study. The synthesized heterojunction was characterized by XRD, SEM, EDX, and TGA techniques. The aqueous solution of crystal violet dye was used as model wastewater for the evaluation of the photocatalytic efficiency of as-synthesized material. The photocatalytic performance of p-n NiO-ZnO for photodegradation of crystal violet dye was significantly higher than pristine NiO and ZnO. The photocatalytic activities of NiO, ZnO and NiO-ZnO were found in the ratio of 1: 3.8: 7.8, respectively. Similarly, the ratio of photocatalytic activities of 5% NiO-ZnO, 10% NiO-ZnO, and 15% NiO-ZnO was 1: 1.2: 0.8, respectively. The degradation data was analyzed for kinetics analyses using the Langmuir-Hinshelwood mechanism.http://www.sciencedirect.com/science/article/pii/S1110016822006433p-n NiO-ZnOHeterojunctionElectron-hole pairCrystal violet dyeLangmuir-Hinshelwood mechanism |
| spellingShingle | Muhammad Saeed Karma Albalawi Iltaf Khan Nadia Akram Ibrahim H.A. Abd El-Rahim Sadeq K. Alhag Ahmed Ezzat Ahmed Faiza Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dye Alexandria Engineering Journal p-n NiO-ZnO Heterojunction Electron-hole pair Crystal violet dye Langmuir-Hinshelwood mechanism |
| title | Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dye |
| title_full | Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dye |
| title_fullStr | Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dye |
| title_full_unstemmed | Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dye |
| title_short | Synthesis of p-n NiO-ZnO heterojunction for photodegradation of crystal violet dye |
| title_sort | synthesis of p n nio zno heterojunction for photodegradation of crystal violet dye |
| topic | p-n NiO-ZnO Heterojunction Electron-hole pair Crystal violet dye Langmuir-Hinshelwood mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S1110016822006433 |
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