Synthesis and characterization of carbon modified TiO2 nanotube and photocatalytic activity on methylene blue under sunlight

Li, Yinchang; Wang, Yongqian; Kong, Jinming; Jia, Hanxiang; Wang, Zhengshu

doi:10.1016/j.apsusc.2015.03.085

Cited by 37 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But as the precious work had proved, C-doped TiO 2 was more active than N-doped TiO 2 [23]. Using anodic oxidation method, Li et al [24] successfully synthesized carbon modified TiO 2 nanotube exhibiting a great enhancement on visible light absorption. Teng et al [25] fabricated carbon/TiO 2 nanocomposites by one-step carbonization method, the results suggested the prepared catalysts were affected severely by the state of carbon on the surface of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Indium doped and carbon modified P25 nanocomposites with high visible-light sensitivity for the photocatalytic degradation of organic dyes

Jin

Duan

et al. 2016

Applied Catalysis A: General

View full text Add to dashboard Cite

The commercially available TiO 2 Degussa P25 was modified using a simple technique to produce a visible-light-actived indium and carbon doped P25 catalyst. The modified photocatalysts have been successfully obtained by thermal heating method. These as-obtained products were successfully characterized by X-ray diffraction (XRD), X-ray photoelectrion spectroscopy (XPS), scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), UV-Vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy respectively. The photocatalytic activities of all prepared catalysts were evaluated by the degradation of organic dyes including methylene blue (MB) and Reactive Red 4 (RR4) under visible light irradiation. As the result shown, the indium and carbon co-doped on P25 nanocomposites possessed the extended light absorption in visible light and better charge separation capability as compared to the pristine P25. The optimum loading of In 3+ ions on P25 was 15%. Moreover, 15% In 2 O 3 /C-P25 showed the highest degradation rate of organic dye, which the removal efficiency can reach over 90% after 90 minutes and the corresponding hydrogen evolution rate of 15% In 2 O 3 /C-P25 was 9 times than P25. It was concluded that the synergistic effects of In 3+ ions and carbon narrowed the band gap of TiO 2 and promoted charge separation, which played a significant role for the enhancement of photoactivity. In addition, it was observed that the photo-degradation for all catalysts followed the first order reaction kinetics. Furthermore, the influence of initial pH values on the photocatalytic degradation of MB and RR4 using 15% In 2 O 3 /C-P25 catalyst was also investigated. Finally, the stability test of photocatalysts was carried out and the photocatalytic mechanism was explained concretely.

show abstract

Section: Introductionmentioning

confidence: 99%

Indium doped and carbon modified P25 nanocomposites with high visible-light sensitivity for the photocatalytic degradation of organic dyes

Jin

Duan

et al. 2016

Applied Catalysis A: General

View full text Add to dashboard Cite

show abstract

“…At present, there are many reports about reduc- 53 ing the band gap energy of TiO 2 and improving its quantum 54 efficiency. For example, doping metal ions or nonmetal ions as 55 electron acceptor can prolong the recombination time between 56 photo-generated electron-hole pairs [6][7][8][9][10][11][12][13][14][15][16] as to obtain the final mesoporous WO 3 -TiO 2 powder samples. As 117 a control, pure TiO 2 , pure WO 3 and WO 3 -TiO 2 powders were also 118 prepared by a similar process without adding P123 as template.…”

mentioning

confidence: 99%

Hydrothermal synthesis of mesoporous WO3–TiO2 powders with enhanced photocatalytic activity

Shi

Liu

Huang

et al. 2015

Advanced Powder Technology

View full text Add to dashboard Cite

“…According to the literature, a significant increase in the absorption of visible light by TiO2 can be related with the presence of carbon atoms in the sample [43][44][45][46][47]. As the carbon species exist mainly on the TiO2 surface rather than occupying the lattice of TiO2, the visible light response of the samples was attributed to the formation of the inter band C2p states [48].…”

Section: Uv-vis Spectrummentioning

confidence: 99%

Highly Active TiO2 Microspheres Formation in the Presence of Ethylammonium Nitrate Ionic Liquid

et al. 2018

View full text Add to dashboard Cite

Spherical microparticles of TiO 2 were synthesized by the ionic liquid-assisted solvothermal method at different reaction times (3, 6, 12, and 24 h). The properties of the prepared photocatalysts were investigated by means of UV-VIS diffuse-reflectance spectroscopy (DRS), Brunauer-Emmett-Teller (BET) surface area measurements, scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicated that the efficiency of the phenol degradation was related to the time of the solvothermal synthesis, as determined for the TiO 2 _EAN(1:1)_24h sample. The microparticles of TiO 2 _EAN(1:1)_3h that formed during only 3 h of the synthesis time revealed a really high photoactivity under visible irradiation (75%). This value increased to 80% and 82% after 12 h and 24 h, respectively. The photoactivity increase was accompanied by the increase of the specific surface area, thus the poresize as well as the ability to absorb UV-VIS irradiation. The high efficiency of the phenol degradation of the ionic liquid (IL)-TiO 2 photocatalysts was ascribed to the interaction between the surface of the TiO 2 and ionic liquid components (carbon and nitrogen). effectiveness of the photocatalysis [5,6]. The extension of the TiO 2 spectral response range to absorb the photons under visible (43%) or/and near infrared (49% of solar spectrum energy) irradiation is crucial for this purpose. The TiO 2 photocatalytic properties can be controlled and their optical response can be expanded to absorb photons under visible or/and near infrared light irradiation through the alteration of the TiO 2 bandgap via morphology engineering [7][8][9][10].It was found that, after excitation, the electrons and holes propagate to the nano-and micro-particles surface where they react with electron acceptors and donors, respectively [6,9,11,12]. Additionally, it has been noted that a slower recombination rate and a larger surface area accounted for more active adsorption/desorption reactions and the surface transfer of photoexcited electrons [9,12,13], whereas the potential adverse effects that originate in the highly defective sites, typically developing with the growth of a large surface area, may be rectified by a higher crystallization of the particles [9].Ionic liquids (ILs) have gained increasing attention in terms of their assistance in TiO 2 synthesis as solvents as well as spatial and, perhaps, band structuring agents. Their high viscosity, dielectric constant, and thus polarity and dispersal capacity are widely recognized as the properties responsible for the charge, steric, and viscous stabilization of small-sized slow-growing crystallites, as well as the hindrance of aggregation and agglomeration processes that are disadvantageous for photocatalytic [7,10,11,[14][15][16][17][18][19][20][21][22][23].The synthesized photocatalysts in the presence of ILs nano-and microparticles are characterized by a larger specific surface area, higher crystallization level, and less crystalline defects [17]. ...

show abstract

Synthesis and characterization of carbon modified TiO2 nanotube and photocatalytic activity on methylene blue under sunlight

Cited by 37 publications

References 21 publications

Indium doped and carbon modified P25 nanocomposites with high visible-light sensitivity for the photocatalytic degradation of organic dyes

Indium doped and carbon modified P25 nanocomposites with high visible-light sensitivity for the photocatalytic degradation of organic dyes

Hydrothermal synthesis of mesoporous WO3–TiO2 powders with enhanced photocatalytic activity

Highly Active TiO2 Microspheres Formation in the Presence of Ethylammonium Nitrate Ionic Liquid

Contact Info

Product

Resources

About