Preparation of One-dimensional CNFs Supported AgX/TiO2(X=Br, I) Ternary Composite and Their Visible Light Photocatalytic Activity

doi:10.7503/cjcu20160858

Abstract

Abstract:

The aim of this study was to prepare a novel visible-light-driven photocatalysts AgX/TiO₂/CNFs(X=Br, I) composites. Carbon nanofibers(CNFs) which acted as a supporter were prepared via electrospinning technology and high-temperature calcination process. AgX-TiO₂/CNFs(X=Br, I) composites were prepared by combining solvothermal with chemical reaction process. The as-prepared composites were characterized by means of X-ray diffraction(XRD), scanning electron microscopy(SEM) and fourier transform infrared spectroscopy(FTIR). The photocatalytic activity of AgX-TiO₂/CNFs(X=Br, I) were researched for decomposition of methyl orange(MO) under visible light irradiation. The excellent performance were attributed to the synergistic effects between the high adsorption capacity, good conductivity of carbon nanofibers, and the extraordinary plasma effect of AgX(X=Br, I) nanoparticles. In addition, the as-prepared composites could be easily separated from the solution phase due to the large length-diameter ratio of CNFs.

Key words: Silver halides, CNFs, Electrospinning, Photocatalytic, Visible light

CLC Number:

O643

TrendMD:

LIANG Haiou, BAI Jie, YU Dandan, ZHANG Qingyu, LI Chunping. Preparation of One-dimensional CNFs Supported AgX/TiO₂(X=Br, I) Ternary Composite and Their Visible Light Photocatalytic Activity[J]. Chem. J. Chinese Universities, 2017, 38(6): 947.

Figures/Tables 6

Scheme 1 Schematic diagram of the experimental

Fig.1 SEM images of TiO2/CNFs(A) and yAgBr-TiO2/CNFs(B)—(F) y: (B) 10%; (C) 20%; (D) 30%; (E) 40%; (F) 50%.

Fig.2 SEM images of TiO2/CNFs(A) and yAgI-TiO2/CNFs(B)—(F) y: (B) 10%; (C) 20%; (D) 30%; (E) 40%; (F) 50%.

Fig.3 XRD patterns of TiO2/CNFs(a), 10%AgBr-TiO2/CNFs(b), the first recycling 10%AgBr-TiO2/CNFs(c), 10%AgI-TiO2/CNFs(d), and the first recycling 10%AgI-TiO2/CNFs(e)

Fig.4 FTIR spectra of PAN NFs(a), CNFs(b), TiO2/CNFs(c), 10%AgBr-TiO2/CNFs(d), and 10%AgI-TiO2/CNFs(e)

Fig.5 Photo degradation curves of MO over different catalysts under visible light irradiation a. CNFs; b. TiO2/CNFs; c. 10%AgBr-TiO2/CNFs; d. 20%AgBr-TiO2/CNFs; e. 30%AgBr-TiO2/CNFs;f. 40%AgBr-TiO2/CNFs; g. 50%AgBr-TiO2/CNFs.

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Preparation of One-dimensional CNFs Supported AgX/TiO₂(X=Br, I) Ternary Composite and Their Visible Light Photocatalytic Activity

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