Effect of chalcogens (S, Se, and Te) on the anatase phase stability and photocatalytic antimicrobial activity of TiO2

Snehamol Mathew, Priyanka Ganguly, Vignesh Kumaravel, John Harrison, Steven J. Hinder, John Bartlett, Suresh C. Pillai*

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةConference articleمراجعة النظراء

23 اقتباسات (Scopus)


The effect of chalcogens such as sulphur (S), selenium (Se), and tellurium (Te) on the anatase to rutile phase transition (ART) of titanium dioxide (TiO2) was investigated. 2※mol % of chalcogen doped TiO2was synthesised via a sol-gel technique. The as-synthesised samples were calcined at different temperatures from 500※°C to 800※°C for 2※h. X-ray diffraction (XRD) and Raman spectroscopy were used to study the ART of TiO2. Te-TiO2showed the highest anatase phase (44%) at 750※°C as compared to other samples. X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectroscopy (UV-DRS) was further utilised to investigate the oxidation state and optical properties. UV-DRS results showed that the substitutional doping of chalcogens in the TiO2lattice enhanced visible light absorption. The photocatalytic efficiency was tested for the disinfection of Escherichia coli (E.coli) under visible light irradiation. It is noted that while the chalcogen modified TiO2improved the anatase stability the antimicrobial activity is not significantly enhanced compared to pure anatase TiO2under visible light illumination. Te-TiO2attained 100% disinfection within 70※min of visible light irradiation and maintained equal antibacterial efficiency as pure TiO2at 750※°C.

اللغة الأصليةEnglish
الصفحات (من إلى)2458-2464
عدد الصفحات7
دوريةMaterials Today: Proceedings
مستوى الصوت33
المعرِّفات الرقمية للأشياء
حالة النشرPublished - 2019
الحدث2019 Fall Meeting Metal Oxide- and Oxyhydride-based Nanomaterials for Energy and Environment-related Applications, EMRS 2019 - Warsaw, Poland
المدة: سبتمبر ١٦ ٢٠١٩سبتمبر ١٩ ٢٠١٩

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