Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes
Photocatalytic degradation is an eco-friendly method effective against a wide range of pollutants, including persistent textile dyes. In this study, cobalt-doped nickel oxide (NiO) nanoparticles were synthesized via a simple chemical precipitation method with varying Co concentrations (1–10 wt%). Th...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
|
| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379725002840 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849243013178458112 |
|---|---|
| author | Govindhasamy Murugadoss Nachimuthu Venkatesh D. Ramachandran Sakthivel Pandurengan Lalitha Gnanasekaran Thiruppathi Kannappan Selvaraj Muruganandam |
| author_facet | Govindhasamy Murugadoss Nachimuthu Venkatesh D. Ramachandran Sakthivel Pandurengan Lalitha Gnanasekaran Thiruppathi Kannappan Selvaraj Muruganandam |
| author_sort | Govindhasamy Murugadoss |
| collection | DOAJ |
| description | Photocatalytic degradation is an eco-friendly method effective against a wide range of pollutants, including persistent textile dyes. In this study, cobalt-doped nickel oxide (NiO) nanoparticles were synthesized via a simple chemical precipitation method with varying Co concentrations (1–10 wt%). These nano catalysts were evaluated for the sunlight-assisted degradation of Methylene Blue (MB) and Rose Bengal (RB) dyes. Structural and morphological analyses were performed using SEM, TEM, XRD, FT-IR, and UV–Vis spectroscopy. Band gap values estimated from Tauc plots showed a significant reduction with Co doping, reaching a minimum of 2.76 eV at 3 % Co concentration. The incorporation of Co2+ ions into the NiO lattice induces asymmetric morphological evolution, enhancing both surface characteristics and photocatalytic degradation efficiency. The 3 % Co-doped NiO exhibits enhanced photocatalytic activity, achieving optimal degradation efficiencies of 77.8 % for methylene blue (MB) and 90 % for rho attributed to improved charge separation. EDX confirmed the successful incorporation of Co ions, which likely acted as electron acceptors or hole donors. Scavenger and cycling analyses confirmed the photocatalyst’s efficiency and stability for environmental remediation. |
| format | Article |
| id | doaj-art-564cd22cf2304e87b79d32afde3d0f66 |
| institution | Kabale University |
| issn | 2211-3797 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj-art-564cd22cf2304e87b79d32afde3d0f662025-08-20T03:59:37ZengElsevierResults in Physics2211-37972025-09-017610839010.1016/j.rinp.2025.108390Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyesGovindhasamy Murugadoss0Nachimuthu Venkatesh1D. Ramachandran2Sakthivel Pandurengan3Lalitha Gnanasekaran4Thiruppathi Kannappan5Selvaraj Muruganandam6Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai 600119 Tamil Nadu, India; Corresponding authors.Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai 600119 Tamil Nadu, IndiaCentre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai 600119 Tamil Nadu, IndiaDepartment of Physics, Manipal University Jaipur, Jaipur 303 007 Rajasthan, India; Corresponding authors.Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileDepartment of Physics, SRM Valliammai Engineering College, SRM Nagar, Kattankulathur 603203 Tamil Nadu, IndiaDepartment of Physics, Meenakshi College of Engineering, West K.K. Nagar, Chennai 600078 Tamil Nadu, IndiaPhotocatalytic degradation is an eco-friendly method effective against a wide range of pollutants, including persistent textile dyes. In this study, cobalt-doped nickel oxide (NiO) nanoparticles were synthesized via a simple chemical precipitation method with varying Co concentrations (1–10 wt%). These nano catalysts were evaluated for the sunlight-assisted degradation of Methylene Blue (MB) and Rose Bengal (RB) dyes. Structural and morphological analyses were performed using SEM, TEM, XRD, FT-IR, and UV–Vis spectroscopy. Band gap values estimated from Tauc plots showed a significant reduction with Co doping, reaching a minimum of 2.76 eV at 3 % Co concentration. The incorporation of Co2+ ions into the NiO lattice induces asymmetric morphological evolution, enhancing both surface characteristics and photocatalytic degradation efficiency. The 3 % Co-doped NiO exhibits enhanced photocatalytic activity, achieving optimal degradation efficiencies of 77.8 % for methylene blue (MB) and 90 % for rho attributed to improved charge separation. EDX confirmed the successful incorporation of Co ions, which likely acted as electron acceptors or hole donors. Scavenger and cycling analyses confirmed the photocatalyst’s efficiency and stability for environmental remediation.http://www.sciencedirect.com/science/article/pii/S2211379725002840NanoparticlesCobalt ion dopingBand gapPhotocatalyticScavenger studyFirst order kinetics |
| spellingShingle | Govindhasamy Murugadoss Nachimuthu Venkatesh D. Ramachandran Sakthivel Pandurengan Lalitha Gnanasekaran Thiruppathi Kannappan Selvaraj Muruganandam Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes Results in Physics Nanoparticles Cobalt ion doping Band gap Photocatalytic Scavenger study First order kinetics |
| title | Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes |
| title_full | Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes |
| title_fullStr | Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes |
| title_full_unstemmed | Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes |
| title_short | Tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes |
| title_sort | tuning cobalt concentration in nickel oxide nanoparticles for enhanced photocatalytic degradation of selective textile dyes |
| topic | Nanoparticles Cobalt ion doping Band gap Photocatalytic Scavenger study First order kinetics |
| url | http://www.sciencedirect.com/science/article/pii/S2211379725002840 |
| work_keys_str_mv | AT govindhasamymurugadoss tuningcobaltconcentrationinnickeloxidenanoparticlesforenhancedphotocatalyticdegradationofselectivetextiledyes AT nachimuthuvenkatesh tuningcobaltconcentrationinnickeloxidenanoparticlesforenhancedphotocatalyticdegradationofselectivetextiledyes AT dramachandran tuningcobaltconcentrationinnickeloxidenanoparticlesforenhancedphotocatalyticdegradationofselectivetextiledyes AT sakthivelpandurengan tuningcobaltconcentrationinnickeloxidenanoparticlesforenhancedphotocatalyticdegradationofselectivetextiledyes AT lalithagnanasekaran tuningcobaltconcentrationinnickeloxidenanoparticlesforenhancedphotocatalyticdegradationofselectivetextiledyes AT thiruppathikannappan tuningcobaltconcentrationinnickeloxidenanoparticlesforenhancedphotocatalyticdegradationofselectivetextiledyes AT selvarajmuruganandam tuningcobaltconcentrationinnickeloxidenanoparticlesforenhancedphotocatalyticdegradationofselectivetextiledyes |