High-efficient Synthesis and Photocatalytic Properties of Ag/AgBr/TiO2 Monolithic Photocatalysts Using Sodium Alginate as Substrate

doi:10.15541/jim20160481

Abstract

Abstract:

SA-Ag/AgBr/TiO₂ monolithic photocatalysts with uniform particle size distribution was synthesized by using sodium alginate as a substrate. Its structure and morphology were characterized by XRD, XPS, SEM, TEM, and HRTEM. The optical properties and the surface area of the SA-Ag/AgBr/TiO₂ monolithic photocatalysts were characterized by FT-IR and BET. The as-prepared photocatalyst with good stability exhibited enhanced photocatalytic performance for degradation of RhB solution under both UV and visible light. The SA-Ag/AgBr/TiO₂ monolithic photocatalyst with 12wt% Ag/AgBr/TiO₂ display optimum properties i.e. about 100% degradation rate for the RhB solution for 60 min under UV irradiation and 54.1% degradation rate for the RhB solution under visible light irradiation for 120 min. Besides, after 5 cycles, the RhB degradation rate still keeps higher than 96%, showing an excellent reusability of the photocatalysts. The as-prepared SA-Ag/ AgBr/TiO₂ monolithic photocatalysts may effectively solve the problems including photocatalytic activity, secondary pollution and photocatalyst recycling.

Key words: sodium alginate, Ag/AgBr/TiO₂ photocatlyst, monolithic photocatalysts, visible light

CLC Number:

O643

TONG Qin, DONG Ya-Mei, YAN Liang, HE Dan-Nong. High-efficient Synthesis and Photocatalytic Properties of Ag/AgBr/TiO₂ Monolithic Photocatalysts Using Sodium Alginate as Substrate[J]. Journal of Inorganic Materials, 2017, 32(6): 637-642.

Figures/Tables 6

Fig. 1 TEM (a) and HRTEM (b) images of Ag/AgBr/TiO2 NCs

Fig. 2 Different magnification SEM images of the SA-Ag/AgBr/TiO2 monolithic photocatalysts

Fig. 3 XRD pattern of Ag/AgBr/TiO2 NCs

Fig. 4 XPS spectra of Ag/AgBr/TiO2 NCs (a) and Ag3d (b)

Fig. 5 FT-IR spectra of the SA-Ag/AgBr/TiO2 monolithic photocatalysts with different contents of Ag/AgBr/TiO2

Fig. 6 RhB photocatalytic degradation by the SA-Ag/AgBr/TiO2 monolithic photocatalysts with different contents of Ag/AgBr/TiO2 under UV irradiation (a) and visiblelight irradiation (b)

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High-efficient Synthesis and Photocatalytic Properties of Ag/AgBr/TiO₂ Monolithic Photocatalysts Using Sodium Alginate as Substrate

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