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  • Synthesis and photocatalytic performances of the TiO2 pillared montmorillonite.

Synthesis and photocatalytic performances of the TiO2 pillared montmorillonite.

Journal of hazardous materials (2012-08-14)
Daimei Chen, Qian Zhu, Fengsan Zhou, Xutao Deng, Fatang Li
ABSTRACT

TiO(2) pillared clay materials were prepared by montmorillonite (Mt) and acidic solutions of hydrolyzed Ti alkoxides in the presence of high-molecular-weight polyoxypropylene (POP)-backboned di-quaternary salts (POP). The as-prepared materials were characterized by means of XRD, FTIR, TG-DTA, XRF, specific surface area and porosity determinations, TEM and SEM, respectively. The experiments showed that the resulting material was a porous delaminated structure containing pillared fragments and nano-scaled TiO(2) particles well dispersed among each other. Introducing polymer surfactant POP as an expanding agent of Mt cannot only promote the formation of the delaminated structure, but significantly improve the porosity and surface area of the composites. The resulting TiO(2) pillared Mt exhibited a good thermal stability as indicated by its surface area after calcination at 800 °C. No phase transformation from anatase to rutile was observed even under calcination at 900 °C. The grain size of anatase in as-prepared sample decreased with the increase of the POP concentration, but increased with the increment of calcination temperature. The photocatalytic performances of these new porous materials were evaluated by using methylene blue degradation. The composite solid exhibited superior photocatalyic property and the maximum removal efficiency was up to 98% within 90 min.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Polypropylene glycol, P 400
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Sigma-Aldrich
Polypropylene glycol, P 2,000
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Sigma-Aldrich
Poly(propylene glycol), average Mn ~425
SKU
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Sigma-Aldrich
Poly(propylene glycol), average Mn ~725
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Sigma-Aldrich
Poly(propylene glycol), average Mn ~1,000
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Sigma-Aldrich
Poly(propylene glycol), average Mn ~4,000
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Sigma-Aldrich
Poly(propylene glycol), average Mn ~2,700
SKU
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Sigma-Aldrich
Poly(propylene glycol), average Mn ~2,000
SKU
Pack Size
Availability
Price
Quantity