Photocatalytic Degradation of COD and NH₄⁺-N Using TiO₂/Sn⁴⁺ Nanomaterials: Optimization of Physicochemical Parameters and Kinetics Studies

Abstract:

The photoactive nanocomposites TiO₂/Sn⁴⁺ with various ratios of Sn⁴⁺ were prepared by a sol-gel method. Their morphology and crystal structure were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The effect of various parameters such as amount of doped Sn⁴⁺ ions, catalyst loading, initial pollutant concentration, pH value, H₂O₂ concentration on photocatalytic degradation performance were analyzed and optimized. The optimal experimental conditions obtained through orthogonal experiments that highest value was obtained at 3%-Sn⁴⁺ doping amount, catalyst dosage 1.5 g/L, initial chemical oxygen demand(COD) concentration 600 mg/L, initial ammonia nitrogen(NH₄⁺-N) concentration 50 mg/L, H₂O₂ 3%, and pH = 8. The photocatalytic degradation rates of NH₄⁺-N and COD reached 87.54% and 75.32%, respectively.

• Periodical: Journal of Nano Research (Volume 84)
• Pages: 55-66
• DOI: https://doi.org/10.4028/p-hzA3VR
• Online since: September 2024
• Authors: Yun Qing Liu*, Wen Yi Zhu, Nian Wei Yang, Tian Xing Wang, Zhi Zhen Yin
• Keywords: COD, Degradation, NH⁴⁺- N, Photocatalysis, Sn⁴⁺- Doped, TiO₂/Sn⁴⁺

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