Preparation of Mesoporous Bi4(GeO4)3 Microspheres from Na4Ge9O20 Template Microspheres for Photodegradation of Reactive Brilliant Red X-3B

doi:10.1007/s40195-015-0307-8

Abstract

Abstract:

Mesoporous materials have attracted increasing attention due to their wide application. In this paper, the Na₄Ge₉O₂₀ microspheres were firstly prepared by solvothermal method. Then, the as-prepared Na₄Ge₉O₂₀ microspheres were dispersed into Bi(NO₃)₃ solution, and the Bi₄(GeO₄)₃ microspheres with mesoporous structure were formed due to the solid-state reaction between bismuth nitrate and Na₄Ge₉O₂₀. The morphology, structure and optical properties were characterized by SEM, EDS, XRD, FITR, BET and UV-Vis diffuse reflectance analysis. The as-prepared products exhibited excellent photocatalytic performance for degradation of reactive brilliant red X-3B under the UV light irradiation. A possible photocatalytic mechanism was discussed as well.

Key words: Mesoporous, Microspheres, Photocatalysis

Hua Chen, Guo-Hua Jiang, Yong-Kun Liu, Lei Li, Qin Huang, Wen-Xing Chen. Preparation of Mesoporous Bi₄(GeO₄)₃ Microspheres from Na₄Ge₉O₂₀ Template Microspheres for Photodegradation of Reactive Brilliant Red X-3B[J]. Acta Metallurgica Sinica (English Letters), 2015, 28(9): 1156-1161.

Figures/Tables 8

Fig. 1 Schematic diagram of the two-step reaction process for Bi4(GeO4)3 preparation.

Fig. 2 SEM image a and the EDS result b of Na4Ge9O20 sample.

Fig. 3 XRD pattern a and FT-IR spectrum b of as-prepared Na4Ge9O20 sample.

Fig. 4 SEM images of Bi4(GeO4)3 sample with different magnifications a-c and EDS result of Bi4(GeO4)3 sample d.

Fig. 5 XRD pattern a and FT-IR spectrum b of Bi4(GeO4)3.

Fig. 6 Nitrogen desorption isotherm and pore size distribution a and UV-Vis diffuse reflectance spectra of Bi4(GeO4)3 b.

Fig. 7 Photocatalytic degradation of RBR-3B a and cycling runs for the photocatalytic degradation of RBRX-3B b.

Fig. 8 Trapping experiment results of active species during the photocatalytic reaction a and schematic illustration of the Bi4(GeO4)3 photocatalytic mechanism of RBRX-3B degradation b.

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Preparation of Mesoporous Bi₄(GeO₄)₃ Microspheres from Na₄Ge₉O₂₀ Template Microspheres for Photodegradation of Reactive Brilliant Red X-3B

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