Photocatalytic Degradation of Isoproturon Pesticide on C, N and S Doped TiO2

Reddy, Police Anil Kumar; Reddy, Pulagurla Venkata Laxma; Sharma, Vutukuri Maitrey; Srinivas, B.; Kumari, V. Durga; Subrahmanyam, M.

doi:10.4236/jwarp.2010.23027

Cited by 81 publications

(26 citation statements)

References 30 publications

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“…Increase of the synthesis temperature from 25 ºC to 80 ºC (RTO-1 and RTO-2) did not affect the particle morphology, but the presence of water in the reaction medium (RTO-3) resulted in the formation of larger particles (Figure 1). The particles obtained under the other synthesis conditions presented morphology similar to that shown in Figure 2, consistent with the literature 32,33 and showing that doping with nitrogen did not alter the morphology of the TiO 2 .…”

Section: Scanning Electron Microscopysupporting

confidence: 78%

Photocatalytic Activity and RNO Dye Degradation of Nitrogen-doped TiO2 Prepared by Ionothermal Synthesis

2017

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This work concerns the preparation a nitrogen-doped TiO 2 by ionothermal synthesis methods and the photocatalytic studies. In this procedure, alkoxide was used as a titanium source, and a deep eutectic mixture of choline chloride and urea (molar ratio 1:2) served as a solvent and source of nitrogen. Different samples were synthesized varying the percentages of the eutectic mixture, titanium butoxide, and water, as well as temperature and reaction time. The catalysts were characterized by X-ray diffraction, Raman spectrometry, scanning electron microscopy, and diffuse reflectance spectroscopy. N-doping was confirmed by X-ray photoelectron spectroscopy. The photocatalytic activity of the N-TiO 2 nanoparticles was evaluated in the oxidation of N,N-dimethyl-4-nitrosoaniline (RNO) dye. The best photocatalytic activity under illumination by UV and visible light was found for the catalysts prepared under reflux in the presence of water, and for the catalysts prepared hydrothermally using intermediate percentages of the nitrogen source (the eutectic mixture).

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Section: Scanning Electron Microscopysupporting

confidence: 78%

Photocatalytic Activity and RNO Dye Degradation of Nitrogen-doped TiO2 Prepared by Ionothermal Synthesis

2017

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“…According to Fig. 3 and the reported energy band gap in the Table 3, the red shift in the DRS spectrum increases and band gap energy shows a decrease with an increase in the content of doped elements in TiO 2 network, which improves light adsorption and optical activity of TiO 2 catalysts 45 . The morphology and size distribution of Mn, Mo, La/TiO 2 /AC nanocomposite were investigated by FE-SEM (Fig.…”

Section: Selection Of Photocatalystmentioning

confidence: 86%

“…2 . The absorption bands of 3100-3700 cm -1 and 1600-1640 cm -1 were assigned to the stretching vibration and bending vibration, respectively, of the hydroxyl groups present on the surface of TiO 2 catalyst 45 . Peaks in the regions of 3434.43 cm -1 and 1608.48 cm -1 were respectively related to the bond stretching and bending -OH groups caused by the adsorbed water molecules and hydroxyl groups.…”

Section: Selection Of Photocatalystmentioning

confidence: 99%

“…It is obvious that pure TiO 2 showed absorption band in the UV area, while the other samples had shifted to the visible light spectra (400 -510 nm) 44 . This shift in the adsorption edge reduced the direct band gap of doped activated carbon catalysts, compared to pure TiO 2 , due to incorporating Mn, Mo, and La into the TiO 2 network and stabilizing doped TiO 2 on activated carbon 45 . The band gap energy can be approximately calculated using Eq.…”

Section: Selection Of Photocatalystmentioning

confidence: 99%

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Visible Light Photocatalytic Degradation of Azo Dye and a Real Textile Wastewater Using Mn, Mo, La/TiO2 /AC Nanocomposite

Jorfi¹

2018

Chem.Biochem.Eng.Q.

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Mn, Mo, La/TiO 2 /activated carbon (AC) photocatalysts were synthesized by sol-gel method. The prepared samples were characterized by XRD, FT-IR, BET, DRS, and FE-SEM techniques. The findings revealed that the synthesized catalysts were anatase type and nano-sized particles. The catalysts exhibited high adsorption ability in the visible light region with a red shift in the adsorption edge. The formation of Mn, Mo, La/TiO 2 / AC crystallites in the activated carbon was confirmed by FE-SEM. The effects of initial dye concentration, catalyst dosage, reaction time, and solution pH were investigated for removal of Reactive Red 198. According to the obtained results, the maximum removal efficiency of 91 % was obtained at initial dye concentration of 20 mg L -1 , pH of 3, and catalyst concentration of 2 g L -1 . Synthesized nano-photocatalyst showed reasonable photo degradation efficiency of 84 % for initial COD concentration of 4700 mg L -1 in treatment of a real textile wastewater sample. GC/MS analysis of raw and treated wastewater confirmed degradation and producing of simple intermediates during the photocatalytic process.

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“…Furthermore, DTA analysis studies reported on TiO 2 using thiourea as a precursor illustrates the role of dopant on the calcination temperature [11][12][13][14]. In the present investigation, the main focus is on shifting the absorption edge of TiO 2 to the visible light region by introducing C, N, and S into the TiO 2 lattice structure.…”

Section: Introductionmentioning

confidence: 97%

Selective solar photocatalytic oxidation of ethylbenzene on C, N, and S doped TiO2

et al. 2011

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The liquid-phase photo-oxidation of ethylbenzene (EB) is investigated in solar light with air/O 2 /N 2 at atmospheric pressure, in a batch reactor using acetonitrile medium. It is carried out over TiO 2 doped with C, N, and S (TCNS) photocatalyst samples. The photocatalytic oxidation yielded acetophenone (33%) and 1-phenylethanol (21%) at 56% conversion of EB during a 6-h irradiation time. This product distribution indicates that C-H bond activation has occurred only at the alkyl chain. The effects of the EB to water content ratio, amount of photocatalyst and its sustainability, pH, have been studied. It is illustrated that the reaction carried out by this environmentally friendly photocatalysis is truly heterogeneous under mild conditions using solar light and no waste generation. An optimum loading of TCNS5 was observed for the photo-oxidation of EB.

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Photocatalytic Degradation of Isoproturon Pesticide on C, N and S Doped TiO2

Cited by 81 publications

References 30 publications

Photocatalytic Activity and RNO Dye Degradation of Nitrogen-doped TiO2 Prepared by Ionothermal Synthesis

Photocatalytic Activity and RNO Dye Degradation of Nitrogen-doped TiO2 Prepared by Ionothermal Synthesis

Visible Light Photocatalytic Degradation of Azo Dye and a Real Textile Wastewater Using Mn, Mo, La/TiO2 /AC Nanocomposite

Selective solar photocatalytic oxidation of ethylbenzene on C, N, and S doped TiO2

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