Preparation of carbon-modified NTiO2/ montmorillonite composite with high photocatalytic activity under visible light radiation

Jiannan Hsing, Yoshikazu Kameshima, Shunsuke Nishimoto, Michihiro Miyake

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    In this paper, the photocatalytic activity of nitrogen-doped TiO2/montmorillonite composite (NTM) was successfully enhanced by modification with carbon. NTM was made by mixing a swelling clay solution with an N-doped TiO2 solution prepared by hydrolysis of titanium tetraisopropoxide with urea. Carbon-modified Ndoped TiO2/montmorillonite composite (CNTM) was obtained by grinding the dried NTM with EtOH for 1 h, followed by calcination at 250°C in the air for 2 h. Both NTM and CNTM exhibited visible light absorption in the UVvis spectrum in the same way as commercial NTiO2 powder. Additionally, CNTM greatly extended the absorption edges to the visible light region. The photocatalytic performance of NTM and CNTM was evaluated using a degradation of bisphenol-A under visible light (>420 nm) radiation. Although the commercial TiO2 powder showed less photocatalytic activity under visible light radiation, NTM, CNTM and commercial NTiO2 powder showed high photocatalytic activity. The order of degradation performance was as follows: CNTM > commercial NTiO2 powder > NTM. Since the TiO2 content of CNTM is ca. 30 mass% by energy dispersive spectrum analysis, it was suggested that CNTM has extremely high visible light activity.

    Original languageEnglish
    Pages (from-to)230-235
    Number of pages6
    JournalJournal of the Ceramic Society of Japan
    Volume126
    Issue number4
    DOIs
    Publication statusPublished - Apr 2018

    Keywords

    • Bisphenol-A
    • Carbon modifying
    • Photocatalytic activity
    • TiO pillared clay
    • Visible light response

    ASJC Scopus subject areas

    • Ceramics and Composites
    • General Chemistry
    • Condensed Matter Physics
    • Materials Chemistry

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