Sargassum horneri‐based carbon‐doped TiO2 and its aquatic naphthalene photodegradation under sunlight irradiation. Issue 5 (26th January 2022)

• Record Type: Journal Article
• Authors: Zeng, Ganning; Hong, Chunxian; Ma, Yuan; Du, Mingming; Zhang, Yan; Luo, Hongwei; Chen, Bing; Pan, Xiangliang
• Is Part Of: Journal of chemical technology & biotechnology. Volume 97:Issue 5(2022)
• Page Start: 1267
• Page End: 1274
• Publication Date: 2022-01-26
• Subjects: Sargassum horneri -- carbon -- TiO2 -- photodegradation -- naphthalene; Biotechnology -- Periodicals; Chemistry, Technical -- Periodicals; Chemical engineering -- Periodicals; Industries -- Environmental aspects -- Periodicals; 660
• DOI: 10.1002/jctb.7021
• Languages: English
• ISSNs: 0268-2575

Abstract

Abstract: BACKGROUND: During the past two decades, aquatic polycyclic aromatic hydrocarbon (PAH) contamination has gained more and more attention, because of carcinogenicity or mutagenicity, toxicity, persistence and bioaccumulation, and a huge threat posed to entire ecosystems. RESULTS: Sargassum horneri ( SH )‐based carbon was pretreated with ethanol and formaldehyde, and obtained after pre‐carbonization using H2 SO4 . The SH carbon powder was used to immobilize nano‐TiO2 in aquatic environment by a facile sol–gel method. The resulting C/TiO2 catalyst was applied to photocatalytic aquatic naphthalene degradation under sunlight and showed the best naphthalene degradation performance of 83.77% under simulated sunlight, which could be attributed to the shape and structure contribution originating from SH . C/TiO2 served as both adsorbent and catalyst in the degradation process of naphthalene, and the photodegradation process conformed to a double‐exponential kinetic model, indicating that there are physical and chemical processes involved in the degradation. The mechanism for enhanced photocatalytic activity was verified as a synergistic mechanism resulting from SH ‐based carbon and TiO2, and showed industrial potential for removal aquatic PAH pollutants. CONCLUSIONS: This study verifies that the synergistic effect resulting from SH ‐based carbon and TiO2 enhanced the photocatalytic performance. © 2021 Society of Chemical Industry (SCI).