Photocatalytic degradation of flumequine with B/N codoped TiO2 catalyst: Kinetics, main active species, intermediates and pathways

A magnetic γ-Fe2O3@PANI@TiO2 core–shell nanocomposite for arsenic removal via a coupled visible-light-induced photocatalytic oxidation–adsorption process

“…2b, the absorption of E g , B 1g and A 1g Raman activity characteristics of TiO 2 at 142, 199, 394, 516, and 638 cm À1 is observed. 40 Aer introducing TiO 2 onto the g-Fe 2 O 3 @PANI, the g-Fe 2 O 3 @-PANI@TiO 2 mainly displays the characteristic peak of TiO 2 with a weak peak of PANI, indicating the relatively high loading of TiO 2 . The X-ray diffraction (XRD) pattern of g-Fe 2 O 3 @PANI exhibits the (220), (311), (400), (422), (511), and (440) planes of g-Fe 2 O 3 , 41 and a weak broad peak in the range of 15-25 deriving from the characteristic of PANI, which indicates the successful synthesis of g-Fe 2 O 3 @PANI (Fig.…”

Photocatalytic degradation of flumequine by N-doped TiO2 catalysts under simulated sunlight

“…2(a). The XRD spectra results of these samples indicated that the main diffraction peaks at 25 [36,40,41], demonstrating that the main phase structure of the prepared samples was anatase. No peak attributed to nitrogen-containing phases was detected in the doped TiO 2 catalysts, indicating that nitrogen was highly dispersed on the TiO 2 surface.…”

“…The photocatalytic activity of the samples was assessed by degrading FLU in aqueous solution under 500 W xenon light irradiation, and its light intensity at the sample position was about 48.0 mW cm −2 . The photochemical reactor is equipped with water circulation cooling device to control the reaction temperature at 25 ± 1ºC and further details of XPA-7 can be found in our previous work [36]. In a typical experiment, a 10 mg of sample was added into a quartz photo-reactor containing 50 mL FLU solution (10 mg L −1 ).…”

“…The detailed step was as follows: 10 mg of as-prepared catalyst sample was dispersed in the 50 mL of FLU aqueous solution (10 mg L −1 ), and then 38.3 mM TBA, 0.38 mM p-BQ, 4.0 mM AgNO 3 or 1.0 g L −1 FA was added into reaction system, respectively. The choice of the concentrations of TBA, p-BQ, AgNO 3 and FA was referred to a previous report [36]. The analytical method was the same as that used in the evaluation of photocatalyst activity mentioned above.…”

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

“…Non-metal co-doped TiO 2 have been studied extensively [173][174][175]. Zeng et al [176] prepared B/N co-doped TiO 2 photocatalysts and compared their photocatalytic performance with pure TiO 2 under simulated sunlight by using flumequine (FLU) as the target compound. The results showed that the degradation rate of FLU by B/N co-doped TiO 2 was nearly 100%, whereas that of pure TiO 2 was only about 10%.…”