Visible light-responded C, N and S co-doped anatase TiO2 for photocatalytic reduction of Cr(VI)

Lei, Xuefei; Xue, Xiangxin; Yang, He; Chen, C.; Li, X.; Pei, Jingyuan; Niu, Mang; Yang, Yang; Gao, Xin

doi:10.1016/j.jallcom.2015.04.233

Cited by 47 publications

(18 citation statements)

References 49 publications

(47 reference statements)

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“…0.4 eV in comparison with that of pure TiO 2 samples (464.80 eV and 458.98 eV) [52]. The shifting of Ti2p binding energy could be ascribed to the fact that the C element was doped into TiO 2 nanostructure [55]. Therefore, the above results confirmed that TiO 2 nanoparticles were composited on the Nano-G.…”

Section: Structure and Morphology Characterizations Of The Tio 2 /Nanmentioning

confidence: 55%

Preparation and electrochemical property of TiO2/Nano-graphite composite anode for electro-catalytic degradation of ceftriaxone sodium

Guo

Wan

et al. 2015

Electrochimica Acta

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Section: Structure and Morphology Characterizations Of The Tio 2 /Nanmentioning

confidence: 55%

Preparation and electrochemical property of TiO2/Nano-graphite composite anode for electro-catalytic degradation of ceftriaxone sodium

Guo

Wan

et al. 2015

Electrochimica Acta

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“…Photocatalyst (0.01; 0.03; and 0.05 g) was added into 60 mL solution containing Cr(VI) with concentration at 5 mg/L, solution pH was adjusted to 2 using H 2 SO 4 6 N [1]. Prior to reach absorption-desorption equilibrium, mixture solution was stirred for 30 min in the dark then 10 mL aliquot was taken.…”

Section: Photocatalytic Activity Testmentioning

confidence: 99%

“…Nowadays, the presence of Cr(VI) in environment turned into environmental problem. Industrial processing such as electroplating, metallurgy, paint, pigment manufacturing, photography, chrome plating, leather tanning industry and wood processing discharge Cr(VI) in effluent streams and increase day by day [1][2][3]. Various materials and methods including physico-chemical [4], electrocoagulation [5], permeable reactivity walls [6],adsorption [7], biosorption [8], bioreduction [9] have been developed to perform effective remediation of Cr(VI) in aquatic environment but end up with high cost and not an effective procedural treatment.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, some methods have been developed to extend the band gap absorption to visible light region including doping or codoping with transition metal such as Cr, Fe, Mn, V, and non-metal atoms such as N, S, C. In the previous research C-Ncodoped TiO 2 photocatalytic activity was found more effective compared to TiO 2 . C-N- codoped has synergistic effect from dopant carbon and nitrogen in light absorption under visible light irradiation to enhance photocatalytic activity [1,[12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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C-N-Codoped TiO2 Synthesis by using Peroxo Sol Gel Method for Photocatalytic Reduction of Cr(VI)

Wellia

Dytta

Safni

2018

J. Pure App. Chem. Res.

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C-N-codoped TiO 2 (CNTO) photocatalysts were successfully synthesized by using "green" method peroxo sol-gel. XRD results revealed the presence of anatase phase only for all samples. The result of Scanning Electron Microscope-Electron Dispersive X-Ray (SEM-EDX) showed surface morphology of CNTO10 was spherical (44 nm) and homogeneous. Diffuse Reflectance Spectra UV-Vis (DRS UV-Vis) result showed red shift in absorbance indicating successful modification of TiO 2 by C and N. The result of photocatalytic activity in reducing Cr(VI) showed that the Cr(VI) reduction increase with the increase of irradiation time and photocatalyst's mass. The highest Cr(VI) reduction was 90.07% for CNTO10 sample. This is due to the synergistic effects of C and N dopants that improves TiO 2 photocatalytic activity under visible light irradiation.

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“…Non-metals anions have impurity states located near valence band edge. A great interest was attracted to doping titanium dioxide with C [1,4,5,[7][8][9][10] and S [11][12][13] using different methods.…”

Section: Introductionmentioning

confidence: 99%

The influence of titanium dioxide modification by sulfur and carbon on physico-chemical and photocatalytic properties

Shapovalova¹,

Khalyavka²,

Khyzhun³

et al. 2019

Him. Fiz. Tehnol. Poverhni

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The nanocomposites based on TiO 2 doped with sulfur (S/TiO 2), carbon (C/TiO 2), carbon and sulfur (S/C/TiO 2) have been obtained. The powders were characterized by XRD, XPS, BET, SEM, EDX, TEM and UV-VIS spectroscopy. EDX and XPS spectroscopies prove that titanium dioxide powder includes only Ti and O elements, composites C/TiO 2 include the elements Ti, O, C, composites S/TiO 2-Ti, O, S and composites C/S/TiO 2-Ti, O, C, and S. XRD analysis revealed the phase of anatase in all composites, rutile phase appeared with increasing of sulfur amount in sulfur-containing powders. It has been found that the composites consist of roundish agglomerates in the range of 5-30 m. Sulfur additives decrease grain growth of titanium dioxide particles from 14 to 9-10 nm in S/TiO 2 composites, carbon leads to increase in particle size from 14 to 19 nm, simultaneous modification of titanium dioxide by carbon and sulfur leads to the formation of particles with sizes of 7-8 nm. Analysis of nitrogen sorption-desorption isotherms for all synthesized samples has shown the presence of a hysteresis loop which is the evidence for mesoporous structure of the powders. The isotherms correspond to type IV of IUPAC classification for mesoporous materials with H1 type for C/TiO 2 and H 2 type for S/TiO 2 , and C/S/TiO 2 of hysteresis loop. The modification of TiO 2 by carbon and sulfur leads to increase of the specific surface area (of about 1.8 times in the case of C/TiO 2 , about 3.3 times for S/TiO 2 and about 4.7 times for C/S/TiO 2), pore volume and decrease of pore radius compared with TiO 2. Absorption spectra of the nanocomposites showed a bathochromic shift as compared with the absorption band of pure TiO 2. It has been found that modification leads to band gap narrowing. Nanocomposite samples showed higher photocatalytic activity in the destruction of safranine T under UV and visible irradiation compared to pure TiO 2. It may be related to the participation of dopants in the inhibition of electron-hole recombination, prolongation of charges lifetime, increasing efficiency of interfacial charge separation and formation of doping electronic states.

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Visible light-responded C, N and S co-doped anatase TiO2 for photocatalytic reduction of Cr(VI)

Cited by 47 publications

References 49 publications

Preparation and electrochemical property of TiO2/Nano-graphite composite anode for electro-catalytic degradation of ceftriaxone sodium

Preparation and electrochemical property of TiO2/Nano-graphite composite anode for electro-catalytic degradation of ceftriaxone sodium

C-N-Codoped TiO2 Synthesis by using Peroxo Sol Gel Method for Photocatalytic Reduction of Cr(VI)

The influence of titanium dioxide modification by sulfur and carbon on physico-chemical and photocatalytic properties

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