Details

Autor(en) / Beteiligte

• Alam, Mir Waqas
• Khalid, N. R
• Naeem, Sumaira
• Niaz, N. A
• Ahmad Mir, Tanveer
• Nahvi, Insha
• Souayeh, Basma
• Zaidi, Noushi

Titel

Novel Nd-N/TiO[sub.2] Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach

Ist Teil von

• Materials, 2022-09, Vol.15 (19)

Ort / Verlag

MDPI AG

Erscheinungsjahr

2022

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• In this study, photocatalysis was employed to degrade a wastewater pollutant (AB-29 dye) under visible light irradiation. For this purpose, nitrogen (N)- and neodymium (Nd)-doped TiO[sub.2] nanoparticles were prepared using the simple hydrothermal method. X-ray diffraction (XRD) revealed an anatase phase structure of the Nd-N/TiO[sub.2] photocatalyst, whereas properties including the surface morphology, chemical states/electronics structure and optical structure were determined using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible (UV-vis.) and photoluminescence (PL) spectroscopies. Photocatalytic testing of the prepared nanomaterials was performed to remove acid blue-29 (AB-29) dye under visible-light exposure. The prepared Nd-N/TiO[sub.2] nanoparticles demonstrated a superior photocatalytic activity and the decolorization efficiency was about 92% after visible-light illumination for 1 h and 20 min, while N/TiO[sub.2], Nd/TiO[sub.2] and TiO[sub.2] only showed a 67%, 43% and 31% decolorization efficiency, respectively. The enhanced photocatalytic activity of the Nd-N/TiO[sub.2] photocatalyst was due to a decrease in the electron/hole's recombination and the increased absorption of TiO[sub.2] in the visible range. The reusability results showed that the average photocatalytic activity decrease for all the samples was only about 16% after five consecutive cycles, indicating a good stability of the prepared nanomaterials. Moreover, the radical scavenging activity of the prepared nanomaterials was evaluated using the DPPH method. The novel Nd-N/TiO[sub.2] exhibited a higher antioxidant activity compared to all the other samples.