Hierarchically ordered macroporous TiO2 architecture via self-assembled strategy for environmental remediation. (February 2022)

• Record Type: Journal Article
• Authors: Athithya, S.; Harish, S.; IKeda, H.; Shimomura, M.; Hayakawa, Y.; Archana, J.; Navaneethan, M.
• Is Part Of: Chemosphere. Volume 288:Part 1(2022)
• Publication Date: 2022-02
• Subjects: Macroporous -- Hierarchical -- Solar cell -- Photocatalysis; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.132236
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Hierarchical orderd macroporous TiO2 architecture (HOMTA) was prepared with aid of ethylenediamine (EDA) and investigated the impact of amine molecules on the properties of TiO2 architecture. The different variation of amine molecules (EDA) leads to tunning the morphology under hydrothermal approach which is confirmed by FESEM and TEM analysis. The XRD and Raman studies confirms the crystal structure of anatase and brookite phase of TiO2 . The surface of the architecture strongly depended on the concentration of EDA which plays a vital role in surface area which is revealed by Brunauer Emmett-Teller (BET) analysis. The obtained HOMTA was employed as photocatalyst and active photoanode in the dye sensitized solar cells (DSSC). The DSSC device exhibits excellent efficiency (η) of 5.27% for the EDA capped TiO2 (S5) which had high surface area (167.11 m 2 /g) for better dye loading, whereas the lower concentration of EDA capped TiO2 (S1, S2, S3 and S4) resulted the efficiency of 2.14, 3.90, 3.25 and 4.37%, respectively. The efficiency of photocatlysis degradation of the prepared samples (S1, S2, S3, S4 and S5) was 94.8, 90.47, 91.41, 91.32 and 93.75% under light source. The excellent photocatalysis property was achieved by S5 within 6 min due to high surface area which inducing more active site. Graphical abstract: Image 1 Highlights: Hierarchical TiO2 macroporous with mesoporous architecture was synthesized by hydrothermal method. The effect of ethylenediamine (EDA) on the formation and functional properties of the TiO2 architecture was investigated. The surface of the network strongly depended on the concentration of EDA.