Efficient Photodegradation of Thiocyanate Ions in Mining Wastewater Using a ZnO-BiOI Heterojunction
Abstract
:1. Introduction
2. Experiment
2.1. Materials
2.2. Synthesis of ZnO
2.3. Synthesis of ZnO-[10%]BiOI
2.4. Characterization
2.5. Photocatalytic Protocol
3. Results and Discussion
3.1. Characterization of ZnO-[10%]BiOI Heterojunction
3.2. Photocatalytic Degradation Evaluation
3.3. Effect of Initial Photocatalyst Loading
3.4. Effect of Initial SCN− Concentration
3.5. pH Effect
3.6. Kinetic Study
3.7. Photoluminescence Study
3.8. Proposed Photodestruction Mechanism
3.9. Chemical State Analysis
4. Comparison with Similar Studies
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Catalyst | Synthesis Method | Contaminant | Contaminant Concentration (ppm) | Efficiency (%) | Time (mins) | Reference |
---|---|---|---|---|---|---|
S2O82− + Fe3+ | Purchased | SCN− | 100 | 100 | 90 | [1] |
TiO2 | Purchased | SCN− | 100 | 100 | 300 | [3] |
UVC/PS/Fe3+ | Purchased | SCN− | 50 | 99.9 | 40 | [24] |
TiO2 | Purchased | SCN− | 40 | 96.5 | [27] | |
Fe(III)/Cr(III) hydroxide | Purchased | SCN− | 40 | 33 | 30 | [32] |
ZnO-[10%]BiOI | Direct and facile | SCN− | 40 | 100 | 27 | This study |
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Ashiegbu, D.C.; Nkhoesa, D.; Erasmus, R.; Potgieter, H.J. Efficient Photodegradation of Thiocyanate Ions in Mining Wastewater Using a ZnO-BiOI Heterojunction. Materials 2024, 17, 3832. https://doi.org/10.3390/ma17153832
Ashiegbu DC, Nkhoesa D, Erasmus R, Potgieter HJ. Efficient Photodegradation of Thiocyanate Ions in Mining Wastewater Using a ZnO-BiOI Heterojunction. Materials. 2024; 17(15):3832. https://doi.org/10.3390/ma17153832
Chicago/Turabian StyleAshiegbu, Darlington C., David Nkhoesa, Rudolph Erasmus, and Herman Johanes Potgieter. 2024. "Efficient Photodegradation of Thiocyanate Ions in Mining Wastewater Using a ZnO-BiOI Heterojunction" Materials 17, no. 15: 3832. https://doi.org/10.3390/ma17153832