Effects of templates on the structure, stability and photocatalytic activity of mesostructured TiO2

Q. Dai; L. Y. Shi; Y. G. Luo; J. L. Blin; D. J. Li; C. W. Yuan; B. L. Su

doi:10.1016/S1010-6030(02)00056-4

Effects of templates on the structure, stability and photocatalytic activity of mesostructured TiO₂

Q. Dai, L. Y. Shi, Y. G. Luo, J. L. Blin, D. J. Li, C. W. Yuan, B. L. Su

Unit of nanomaterials chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Using long-chain alkylphosphate and alkylamine surfactants as templates, two kinds of purely mesoporous TiO₂ molecular sieves (Ti-TMS) were prepared by hydrolysis of titanium isopropoxide under completely different conditions. The templates can be successfully removed by refluxing the samples in an EtOH/H₂O/HN0₃ solution. Properties of the samples were characterized by means of SEM, FT-IR, DR-UV, TEM, XRD and TG-DTA techniques. XRD patterns and TEM images confirm that the uniformity and stability of Ti-TMS1 synthesized with dodecylphosphate, hexadecylphosphate, or octadecylphosphate as templates is superior to that of Ti-TMS2 prepared with dodecylamine. Furthermore, after the removal of the templates, the stability and the structure of the mesoporous Ti-TMS1 are better than that of Ti-TMS2. Effects of other factors on the structure and stability of Ti-TMS are discussed. The photocatalytic activities of Ti-TMS were also investigated by using polychlorophenol (TCP) and reactive red dye (X-3B) solutions as model pollutants. It was found that the amount of the templates greatly affects the photoactivity of these kind of mesoporous materials.

Original language	English
Pages (from-to)	295-301
Number of pages	7
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	148
Issue number	1-3
DOIs	https://doi.org/10.1016/S1010-6030(02)00056-4
Publication status	Published - 31 May 2002

Keywords

Mesoporous materials
Photocatalysis
Pollutants
TiO

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title = "Effects of templates on the structure, stability and photocatalytic activity of mesostructured TiO2",

abstract = "Using long-chain alkylphosphate and alkylamine surfactants as templates, two kinds of purely mesoporous TiO2 molecular sieves (Ti-TMS) were prepared by hydrolysis of titanium isopropoxide under completely different conditions. The templates can be successfully removed by refluxing the samples in an EtOH/H2O/HN03 solution. Properties of the samples were characterized by means of SEM, FT-IR, DR-UV, TEM, XRD and TG-DTA techniques. XRD patterns and TEM images confirm that the uniformity and stability of Ti-TMS1 synthesized with dodecylphosphate, hexadecylphosphate, or octadecylphosphate as templates is superior to that of Ti-TMS2 prepared with dodecylamine. Furthermore, after the removal of the templates, the stability and the structure of the mesoporous Ti-TMS1 are better than that of Ti-TMS2. Effects of other factors on the structure and stability of Ti-TMS are discussed. The photocatalytic activities of Ti-TMS were also investigated by using polychlorophenol (TCP) and reactive red dye (X-3B) solutions as model pollutants. It was found that the amount of the templates greatly affects the photoactivity of these kind of mesoporous materials.",

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author = "Q. Dai and Shi, {L. Y.} and Luo, {Y. G.} and Blin, {J. L.} and Li, {D. J.} and Yuan, {C. W.} and Su, {B. L.}",

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AU - Dai, Q.

AU - Shi, L. Y.

AU - Luo, Y. G.

AU - Blin, J. L.

AU - Li, D. J.

AU - Yuan, C. W.

AU - Su, B. L.

PY - 2002/5/31

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N2 - Using long-chain alkylphosphate and alkylamine surfactants as templates, two kinds of purely mesoporous TiO2 molecular sieves (Ti-TMS) were prepared by hydrolysis of titanium isopropoxide under completely different conditions. The templates can be successfully removed by refluxing the samples in an EtOH/H2O/HN03 solution. Properties of the samples were characterized by means of SEM, FT-IR, DR-UV, TEM, XRD and TG-DTA techniques. XRD patterns and TEM images confirm that the uniformity and stability of Ti-TMS1 synthesized with dodecylphosphate, hexadecylphosphate, or octadecylphosphate as templates is superior to that of Ti-TMS2 prepared with dodecylamine. Furthermore, after the removal of the templates, the stability and the structure of the mesoporous Ti-TMS1 are better than that of Ti-TMS2. Effects of other factors on the structure and stability of Ti-TMS are discussed. The photocatalytic activities of Ti-TMS were also investigated by using polychlorophenol (TCP) and reactive red dye (X-3B) solutions as model pollutants. It was found that the amount of the templates greatly affects the photoactivity of these kind of mesoporous materials.

AB - Using long-chain alkylphosphate and alkylamine surfactants as templates, two kinds of purely mesoporous TiO2 molecular sieves (Ti-TMS) were prepared by hydrolysis of titanium isopropoxide under completely different conditions. The templates can be successfully removed by refluxing the samples in an EtOH/H2O/HN03 solution. Properties of the samples were characterized by means of SEM, FT-IR, DR-UV, TEM, XRD and TG-DTA techniques. XRD patterns and TEM images confirm that the uniformity and stability of Ti-TMS1 synthesized with dodecylphosphate, hexadecylphosphate, or octadecylphosphate as templates is superior to that of Ti-TMS2 prepared with dodecylamine. Furthermore, after the removal of the templates, the stability and the structure of the mesoporous Ti-TMS1 are better than that of Ti-TMS2. Effects of other factors on the structure and stability of Ti-TMS are discussed. The photocatalytic activities of Ti-TMS were also investigated by using polychlorophenol (TCP) and reactive red dye (X-3B) solutions as model pollutants. It was found that the amount of the templates greatly affects the photoactivity of these kind of mesoporous materials.

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Effects of templates on the structure, stability and photocatalytic activity of mesostructured TiO₂

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