Preparation and characterization of Mn-S co-doped TiO2 nanocomposite photocatalyst for the photodegradation of phenol and reactive textile dyes.
Saved in:
| Title: | Preparation and characterization of Mn-S co-doped TiO |
|---|---|
| Authors: | Siddiqa, Asima1 (AUTHOR) a.sam.malik@gmail.com, Haider, Sabtain2 (AUTHOR) hsibtain04@gmail.com, Mushtaq, Marium3 (AUTHOR), Farooq, Saima4 (AUTHOR), Shahida, Shabnam3 (AUTHOR) |
| Source: | Journal of Dispersion Science & Technology. 2026, Vol. 47 Issue 8, p1573-1590. 18p. |
| Subject Terms: | *Photodegradation, *Phenol, *Sol-gel processes, *Photocatalysts, *Materials analysis, *Wastewater treatment, *Textile dyeing |
| Abstract: | Titania-based photocatalytic degradation is extensively used for treating industrial wastewater containing textile dyes and phenol. In this study, manganese (Mn) (x = 1, 3, and 5 wt.%) and sulfur (S) (y = 1 wt.%) co-doped TiO2 (MnxSyT) were synthesized via sol–gel technique and characterized by X-ray diffraction (XRD), UV–visible DRS, PL, Brunauer–Emmett–Teller (BET), Fourier Transform Infrared (FT-IR), and SEM. The XRD showed that co-doping reduced the crystallite size to 13.77 nm while retaining the anatase phase. UV–visible DRS and PL showed that the co-dopant's synergetic effect reduced the TiO2 bandgap to 2.04 eV and improved electron-hole pair separation, enhancing the photodegradation efficiency. The BET showed the co-doping enhanced surface area (53–110 m2g−1) and pore volume (0.34–1.10 cm3g−1). FT-IR confirmed the photocatalysts' purity and stability, while SEM displayed better morphology and bulk superficial properties of the samples. Notably, Mn5S1T possesses low crystallite size and bandgap, high surface area, porosity and purity, better texture, and reusability, and achieving 59%, 86%, and 99% degradation of phenol, Yellow 2 G, and Blue KBR dyes, respectively, under optimized conditions (catalyst dose: 0.2 g/L, pollutant concentration: 20 ppm, pH: 3 (phenol) and 7 (dyes), irradiation time: 120 min) under sunlight. The pseudo-order (zero, first, and second) and BMG kinetics models are used to study the photodegradation of phenol and dyes. The analysis shows that the process follows first-order kinetics, with rate constants of 0.0066, 0.0087, and 0.0167 min−¹ for phenol, Yellow 2 G, and Blue KBR. Mn5S1T photocatalyst offers a cost-effective, efficient, and eco-friendly solution to degrade textile dyes and phenol on an industrial scale. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | Titania-based photocatalytic degradation is extensively used for treating industrial wastewater containing textile dyes and phenol. In this study, manganese (Mn) (x = 1, 3, and 5 wt.%) and sulfur (S) (y = 1 wt.%) co-doped TiO2 (MnxSyT) were synthesized via sol–gel technique and characterized by X-ray diffraction (XRD), UV–visible DRS, PL, Brunauer–Emmett–Teller (BET), Fourier Transform Infrared (FT-IR), and SEM. The XRD showed that co-doping reduced the crystallite size to 13.77 nm while retaining the anatase phase. UV–visible DRS and PL showed that the co-dopant's synergetic effect reduced the TiO2 bandgap to 2.04 eV and improved electron-hole pair separation, enhancing the photodegradation efficiency. The BET showed the co-doping enhanced surface area (53–110 m2g−1) and pore volume (0.34–1.10 cm3g−1). FT-IR confirmed the photocatalysts' purity and stability, while SEM displayed better morphology and bulk superficial properties of the samples. Notably, Mn5S1T possesses low crystallite size and bandgap, high surface area, porosity and purity, better texture, and reusability, and achieving 59%, 86%, and 99% degradation of phenol, Yellow 2 G, and Blue KBR dyes, respectively, under optimized conditions (catalyst dose: 0.2 g/L, pollutant concentration: 20 ppm, pH: 3 (phenol) and 7 (dyes), irradiation time: 120 min) under sunlight. The pseudo-order (zero, first, and second) and BMG kinetics models are used to study the photodegradation of phenol and dyes. The analysis shows that the process follows first-order kinetics, with rate constants of 0.0066, 0.0087, and 0.0167 min−¹ for phenol, Yellow 2 G, and Blue KBR. Mn5S1T photocatalyst offers a cost-effective, efficient, and eco-friendly solution to degrade textile dyes and phenol on an industrial scale. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 01932691 |
| DOI: | 10.1080/01932691.2024.2448751 |
