Enhanced photocatalytic performance of TiO2 based on synergistic effect of Ti3+ self-doping and slow light effect

Qi, Dianyu; Lu, Liujia; Xi, Zhenhao; Wang, Lingzhi; Zhang, Jinlong

doi:10.1016/j.apcatb.2014.06.020

Cited by 116 publications

(51 citation statements)

References 27 publications

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“…There are two main factors that influence the photocatalytic activity of TiO 2 IOs; slow photon induce absorption and stop band induced reflection of light. 21 The TiO 2 IO-215 film with the PBG maxima at 336 nm had the highest activity since the red edge of the band gap (400 nm) is closer to the EBG of TiO 2 (484 nm). 8,9 At the red edge of the PBG; the light predominantly localizes in the high dielectric part of the IO structure and will interact prominently with the TiO 2 network.…”

Section: Photocatalytic Degradationmentioning

confidence: 94%

Nitrogen-fluorine co-doped titania inverse opals for enhanced solar light driven photocatalysis

Rahul

Sandhyarani

2015

Nanoscale

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Three dimensionally ordered nitrogen-fluorine (N-F) co-doped TiO2 inverse opals (IOs) were fabricated by templating with polystyrene (PS) colloidal photonic crystals (CPCs) by infiltration. During preparation, the TiO2 precursor was treated with a mixture of nitric acid and trifluoroacetic acid to facilitate N-F co-doping into the TiO2 lattice. Enhanced solar light absorption was observed in the samples as a consequence of the red shift in the electronic band gap of TiO2 due to N-F co-doping. The photonic band gap (PBG) of these TiO2 IO films was tuned by varying the sphere size of the PS CPC templates. The as-prepared N-F co-doped TiO2 IO films were used as photocatalysts for the degradation of Rhodamine B (RhB) dye under solar light irradiation. A significant enhancement in the photocatalytic activity was observed in N-F co-doped TiO2 IO films prepared using PS spheres of 215 nm as a template, with the red edge of the PBG closer to the electronic band gap (EBG) of TiO2. 100% of the dye molecules were degraded within 2 minutes under direct solar irradiation, which is one of the fastest reaction times ever reported for RhB degradation in the presence of TiO2 photocatalysts. The N-F co-doped TiO2 IO film prepared using PS of 460 nm with its PBG centered at 695 nm also showed good photocatalytic activity. It was found that the IO films displayed improved photocatalytic activity in comparison to ordinary nanocrystalline (nc)-TiO2 films. The enhancement could be attributed to the bandgap scattering effect and the slow photon effect, leading to a significant improvement in solar light harvesting.

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Section: Photocatalytic Degradationmentioning

confidence: 94%

Nitrogen-fluorine co-doped titania inverse opals for enhanced solar light driven photocatalysis

Rahul

Sandhyarani

2015

Nanoscale

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“…Figure 1a evidently shows that all samples are presented in various coloration which are remarkably different from white perfect TiO 2 nanocrystal particles, indicating the existence of Ti 3+ [31]. The initial light blue TiO 2-x nanoparticles obtained after hydrothermal synthesis change their color dramatically when treated via a controllable post-annealing process.…”

Section: Characterization Of Ti 3+ Self-doped Anatase Tiomentioning

confidence: 95%

Management on the location and concentration of Ti3+ in anatase TiO2 for defects-induced visible-light photocatalysis

Xin

Yin

et al. 2015

Applied Catalysis B: Environmental

227

108

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“…1. According to our previous work [13], during the solvothermal process, AMAT catalyzed the hydrolysis of TBOT in the non-aqueous system. AMAT decomposed to produce acetic acid, which could esterify with ethanol to generate water molecules.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of TiO2/Co-g-C3N4 heterojunction catalyst and its photocatalytic performance

Zhou

Wang

Lei

et al. 2017

Catalysis Communications

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116

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Enhanced photocatalytic performance of TiO2 based on synergistic effect of Ti3+ self-doping and slow light effect

Cited by 116 publications

References 27 publications

Nitrogen-fluorine co-doped titania inverse opals for enhanced solar light driven photocatalysis

Nitrogen-fluorine co-doped titania inverse opals for enhanced solar light driven photocatalysis

Management on the location and concentration of Ti3+ in anatase TiO2 for defects-induced visible-light photocatalysis

Fabrication of TiO2/Co-g-C3N4 heterojunction catalyst and its photocatalytic performance

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