Advanced photocatalytic strategies for nitrate nitrogen removal using optimized Ag-TiO2 photocatalysts
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Boonwan, C.; Rojviroon, T.; Ranjith, R.; Muangmora, R.; Phouheuanghong, P.; Sirivithayapakorn, S.; Rojviroon, O.; Sudpraserat, K.; Kasayapanand, N.; Songprakorp, R.
ผู้เผยแพร่: Springer
ปีที่เผยแพร่ (ค.ศ.): 2025
Volume number: 116
Issue number: 3
หน้าแรก: 2188
หน้าสุดท้าย: 2199
จำนวนหน้า: 12
นอก: 0928-0707
eISSN: 1573-4846
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
Nitrate contamination poses a severe environmental threat due to its detrimental impact on aquatic ecosystems and human health, necessitating efficient remediation strategies. This study explores the potential of silver-doped titanium dioxide (Ag-TiO2) nanoparticles as an advanced photocatalyst for nitrate removal from wastewater. Ag doping enhances the photocatalytic activity of TiO2 by narrowing its bandgap energy and improving charge carrier separation, thereby facilitating efficient nitrate reduction under ultraviolet A (UVA) irradiation. The crystalline structure, morphology, oxidation states, and optical properties of the synthesized Ag-TiO2 nanoparticles were characterized using various analytical techniques. A series of controlled batch experiments was conducted to investigate the effects of photocatalyst dosage (0.1, 0.5, 1.0, and 2.0 g) and initial nitrate concentrations (10, 25, 50, 80, and 100 mg-N/L) on the photocatalytic reduction process. The results indicate that 1.0% Ag-TiO2 exhibits superior nitrate removal efficiency (over 97% within 90 min) compared to undoped TiO2, with predominant conversion to environmentally benign nitrogen gas (N2) and minimal accumulation of undesired byproducts such as nitrite (NO3−) and ammonium ions (NH4+). The enhanced performance is attributed to the plasmonic effect of silver, which extends the light absorption range into the UVA spectrum and suppresses electron-hole recombination. This study highlights the environmental sustainability of Ag-TiO2 as an efficient, photocatalytically active material for nitrate remediation, presenting a promising solution for wastewater treatment applications. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.
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