Superior photocatalytic efficiency of visible-light-driven metal oxide–BiVO₄ heterostructure on degradation for nitroaromatic pollutants
Journal of Sol-Gel Science and Technology, cilt.119, sa.2, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 119 Sayı: 2
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s10971-026-07220-1
- Dergi Adı: Journal of Sol-Gel Science and Technology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Compendex, Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: 4-Nitroaniline, 4-Nitrophenol, BiVO4, Degradation, Photocatalysis, Visible light
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet
Özet
BiVO4 was synthesized via the hydrothermal method at different temperatures. Metal oxide (CuO, NiO, Fe2O3) modified BiVO4 nanocomposites were prepared using the impregnation method and then X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), photoluminescence spectroscopy (PL) and other techniques. The photocatalytic degradation mechanism for nitroaromatic pollutants was analyzed by Liquid Chromatography-Mass/Mass Spectrometry (LC-MS/MS) technique. The results show that metal oxides successfully entered the BiVO4 lattice structure; the composites exhibit strong interactions, narrow band gaps, and small particle sizes, which improve visible-light absorption. Due to the synergistic effect between metal oxide and BiVO4, which causes weak recombination of electron-hole pairs and high photon efficiency. The nanocomposites exhibited significantly enhanced photocatalytic properties under light irradiation. The highest degradation efficiency was obtained with the BiVO4(pH 2-100 ℃) at 100 °C. The addition of CuO to the BiVO4 structure improved the photocatalytic degradation performance of nitroaromatic compounds. Complete degradation of 4-nitrophenol (4-NP) was achieved in 30 min, and 4-nitroaniline (4-NA) was completely degraded in 60 min with BiVO4-5CuO. BiVO4-5CuO nanocomposite exhibits the highest photodegradation rate for 4-NP (1.30 min–1) and 4-NA (1.41 min–1). This work presents the synthesis of a novel nanocomposite, which has a spherical-like morphology, that exceptionally enhances the charge-carrying ability and thereby accelerates the photocatalytic degradation of nitrophenols.