Thermogravimetric study of the sulfurization of TiO2 using CS2

Jhon Cuya, Nobuaki Sato, Katsutoshi Yamamoto, Atsushi Muramatsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Titanium dioxide is the well-known catalyst for the photodecomposition of water in UV region and its nanoparticles show better performance than its bulk materials. Furthermore, partially sulfurized TiO2 is expected to be chemically stable and have an enhanced photocatalytic activity compared with TiO2. For this purpose, the sulfurization behavior of TiO2 nanoparticles was thermogravimetrically (TG) studied by a thermo-balance with a quartz spring using CS2. From the TG curve of TiO2 nanoparticles, first, the weight decrease appeared down to around 8 wt% and then sulfurization reaction started at around 500°C at a heating rate of 1°C/min. The weight increase curve showed a maximum of ca 30 wt% at around 750°C and then gradually decreased to ca 12 wt% at 1000°C. This would be caused by the formation of TiS2 followed by the decomposition of TiS2 to lower sulfides, such as Ti1.08S2 and Ti3S4. From the comparison of the sulfurization of TiO2 nanoparticles with that of anatase, rutile and Ti(OH)4, it was found that TiO2 nanoparticles showed a similar behavior to that of Ti(OH)4.

Original languageEnglish
Title of host publicationYazawa International Symposium
Subtitle of host publicationMetallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies
EditorsF. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn, F. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn
Pages595-601
Number of pages7
Publication statusPublished - 2003 Oct 16
EventYazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies - San Diego, CA, United States
Duration: 2003 Mar 22003 Mar 6

Publication series

NameYazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Materials Processing Fundamentals and New Technologies
Volume1

Other

OtherYazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Materials Processing Fundamentals and New Technologies
CountryUnited States
CitySan Diego, CA
Period03/3/203/3/6

ASJC Scopus subject areas

  • Engineering(all)

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