Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    No. 7    July 2012

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Preparation of UV-visible light responsive photocatalyst from titania-bearing blast furnace slag modified with (NH4)2SO4
LEI Xue-fei1, XUE Xiang-xin2, YANG He2

1. School of Resources and Materials, Northeastern University (Qinhuangdao),
Qinhuangdao 066004, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China

Abstract:Sulfate-modified titanium dioxide-bearing blast furnace slag (STBBFS) photocatalysts were prepared by the high energy ball milling method with (NH4)2SO4 and titanium dioxide-bearing blast furnace slag (TBBFS) as raw materials. X-ray photoelectron spectroscopy(XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), UV-visible diffuse reflectance absorption spectra (UV-Vis), adsorption experiment and photocatalytic degradation measurement were conducted to characterize the structure, surface status, light absorption capacity, adsorption capacity and photocatalytic activity of the obtained photocatalysts. The adsorption equilibrium was described by the Langmuir isotherm model with a maximum adsorption capacity of 8.25 mg/g of Cr(VI) ions onto the STBBFS photocatalysts. As a result, sulfation of TBBFS improved the photocatalytic activities of STBBFSx photocatalysts. At a low calcination temperature, the photocatalytic activity of STBBFS300 photocatalyst was markedly higher compared with TBBFSx prepared at high calcination temperature, indicating that the photocatalytic activity of STBBFSx photocatalyst was determined by the balanced result between adsorption capacity and perovskite content.

 

Key words: sulfate modification; titanium dioxide-bearing blast furnace slag; Cr(VI); adsorption capacity; photocatalytic activity

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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