Authors:Magdalena Janus, Ewelina Kusiak-Nejman, and Antoni W. Morawski
information about the photocatalyst surface after the degradation process, because it is very important to observe the color of titania material surface to be sure that all the dye was decomposed. The photocatalyticactivity is usually estimated by measuring
Authors:Hyun-Gyu Kang, Hyunho Shin, and Gihong Kim
(TiO 2−x N x ) was reported to be successful as a visible-light-sensitive photocatalyst [ 1 ].
Nitrogen-doped Ta 2 O 5 also demonstrates photocatalyticactivity to decompose organic compounds under visible-light irradiations [ 2 , 3 ]. It is
Authors:Shin-Tae Bae, Hyunho Shin, Sangwook Lee, Dong Wook Kim, Hyun Suk Jung, and Kug Sun Hong
TiO 2 , Ta 2 O 5 shows photocatalyticactivity under UV light irradiation [ 4 , 5 ]; furthermore, nitrogen-doped Ta 2 O 5 decomposes gaseous iso-propanol under Vis light irradiation [ 6 ], as in the case of N-doped TiO 2 . As the degree of nitrogen
Authors:Magdalena Janus, Ewelina Kusiak-Nejman, and Antoni Waldemar Morawski
the crystallinity of TiO 2 and the photocatalyticactivity. Eremia et al. [ 6 ] suggested that the fluorescence method using terephthalic acid to observe the generation of hydroxyl radicals is rapid, efficient, and highly sensitive, and the apparatus
Authors:Nándor Balázs, Attila Gácsi, Attila Pallagi, Károly Mogyorósi, Tünde Alapi, Pál Sipos, and András Dombi
area, crystalline phases and surface quality) of the catalyst nanoparticles, so that achieving the highest possible photocatalyticactivity. For more details of the synthesis procedure, see our previous publication [ 9
To utilize visible light more efficiently in photocatalytic reactions, Bi2O3/CaO photocatalysts were prepared by a mechanical mixing method and characterized by X-ray diffraction (XRD) and UV–vis spectroscopy.
UV–vis spectroscopy results showed that the photocatalysts have a wide absorption band in the range of visible light. The
photocatalytic activities of obtained Bi2O3, CaO, and Bi2O3/CaO samples were evaluated by methylene blue degradation under visible light irradiation. It was found that the Bi2O3/CaO sample exhibited the highest photocatalytic activity.
Authors:Bo-Hyun Kim, Tae-Hee Lim, Jin-Woong Roh, Sang-Geun Lee, Chang Ju, Seong Park, Seong Hong, and Gun Lee
Undoped and Cr-doped Bi12TiO20 (BTO) were prepared and used as photocatalysts for the degradation of formic acid both under visible light and UV irradiation.
The effects of the Cr doping on the visible light response and the photocatalytic activity of BTO were investigated. The prepared
catalysts were characterized by using XRD, XPS, UV–Vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy.
The doping of Bi12TiO20 with low concentration of Cr leads to noticeable increase in visible light absorption and decrease in the recombination rate
of photo-generated electrons and holes. As a result, the Cr-doped BTO showed a higher photocatalytic activity for the degradation
of formic acid both under visible light and UV irradiation, as compared with undoped BTO.
Authors:Changlin Yu, Caifeng Fan, Xiangjie Meng, Kai Yang, Fangfang Cao, and Xin Li
energy conversion [ 1 – 7 ]. Among photocatalysts, TiO 2 has received the most attention as a photocatalytic material because of its superior photocatalyticactivity, chemical stability, low cost, and nontoxicity [ 8 , 9 ]. A major drawback of TiO 2 is
Authors:Behzad Koozegar Kaleji, Rasoul Sarraf-Mamoory, and Sohrab Sanjabi
advantage of not only high photocatalyticactivity, but also good acid resistance, low cost, and no toxicity, which makes titanium dioxide one of the best photocatalytic agents [ 3 , 4 ].
Titania can exist as an amorphous layer and also in three
Authors:Mojtaba Nasr-Esfahani and Abolghasem Nourmohammadi
semiconductor photocatalysts with high photocatalyticactivity, nontoxic nature, stability in aqueous solution, and relatively low cost. The superior photocatalytic property of ZnO is due to its direct band gap and longer lifetime of photogenerated electrons and