Determination of the amorphous phase in titania and its influence on photocatalytic properties

DOI

10.2991/icmcm-16.2016.100How to use a DOI?

Keywords

Amorphous; Mesoporous; Photocatalytic

Abstract

In the present work, we compare the photocatalytic activity of titania samples normalized to the sample weight and specific surface area (SSA), and show a correlation between the PCA of titania catalysts with similar phase compositions and amorphous phase contents. Catalysts with a significant amorphous content were annealed and processed by partial dissolution in acid and included in the analysis. PCA was measured by methyl orange (MO) photodegradation in an aqueous catalyst suspension under high-pressure Hg bulb illumination and the pH was controlled using phosphate buffer (pH 6.9). The weight percentage of the amorphous phase was determined using reference intensity ratios (RIR) for X-ray diffraction patterns of the titania samples measured with crystalline silicon additives. The reproducibility of the proposed method was demonstrated by measuring the amorphous content in mixtures of the sample and XRD-amorphous titania. The obtained results show that the PCA of the titania samples decreases with the weight percentage of the amorphous phase.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Guang Hu
AU  - Sainan Chen
AU  - Qinfang Shi
AU  - Xiang He
AU  - Pengcheng Chen
PY  - 2016/12
DA  - 2016/12
TI  - Determination of the amorphous phase in titania and its influence on photocatalytic properties
BT  - Proceedings of the 2016 7th International Conference on Mechatronics, Control and Materials (ICMCM 2016)
PB  - Atlantis Press
SP  - 519
EP  - 524
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmcm-16.2016.100
DO  - 10.2991/icmcm-16.2016.100
ID  - Hu2016/12
ER  -