An economic method to prepare vacuum activated photocatalysts with high photo-activities and photosensitivities

Xing, Mingyang; Zhang, Jinlong; Chen, Feng; Tian, Baozhu

doi:10.1039/c1cc10537j

Cited by 313 publications

(205 citation statements)

References 32 publications

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“…Compared with the un-doped TiO 2 , the vacuumed TiO 2 of V-TiO 2 has obviously enhanced visible light absorption, owing to the generation of Ti 3? in the bulk of TiO 2 , which is consistent with our previous research work [8,11,12,36]. It is obvious that the absorption band of TiO 2 has an red-shift after the further doping of carbon, as shown in Fig.…”

Section: Uv-drs Electron Paramagnetic Resonance (Epr) and Xps Studiessupporting

confidence: 91%

“…self-doped TiO 2 by a simple vacuum activation method in recent years [11,12,20], and it is not surprising to observe the obvious enhancement of photocatalytic activity of V-TiO 2 for the degradation of MO under solar light irradiation (Fig. 6).…”

Section: Photo-catalytic Activitymentioning

confidence: 91%

“…states. Our previous work found that, compared with pure P25, samples with vacuum activation performed higher photo-oxidation activity towards methyl orange (MO) and phenol under visible light [11], and the vacuum activation method can be extended to other metal oxides such as ZnO.…”

Section: Introductionmentioning

confidence: 99%

“…TiO 2 (TiO 2-x ) containing Ti 3? or O vacancies has been confirmed to be responsible for the absorption of visible light [11,33]. There are many methods to prepare the reduced TiO 2 , such as heating in a vacuum or in a reducing gas atmosphere [11,34], laser irradiation [35], and highenergy particle bombardment [electrons or argon ions (Ar ?) ] [31].…”

Section: Introductionmentioning

confidence: 99%

“…However, its band gap energy (3.2 eV) requires it to absorb only ultraviolet (UV) solar light, which accounts for about 5 %, thereby limiting its utilization as a catalyst for luminous energy [5,6]. Hence, efforts have been devoted to preparing a modified TiO 2 photocatalyst that is capable efficiently utilizing visible light [6][7][8][9][10][11][12]. After much research, doping modification of TiO 2 is considered a possible way to improve the optical sensitivity and activity of TiO 2 in the irradiation of visible light.…”

Section: Introductionmentioning

confidence: 99%

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Vacuum activation-induced Ti3+ and carbon co-doped TiO2 with enhanced solar light photo-catalytic activity

Zhou

Xing

et al. 2015

Res Chem Intermed

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Ti 3? and carbon co-doped TiO 2 photocatalysts were prepared hydrothermally to introduce the carbon, and followed by simple vacuum activation to achieve the Ti 3? self-doping. The prepared co-doped photocatalysts were characterized by XRD, TEM, UV-Vis absorption spectra, EPR, and XPS. It was found that the co-doped TiO 2 has dispersed nanoparticles and a narrower band-gap compared with the un-doped TiO 2 and single-doped TiO 2 . The experimental results displayed that the coke carbon generated on the surface of co-doped TiO 2 acts as a photosensitizer and has the photosensitization effect under solar light irradiation. Except for the carbon sensitization effect, the Ti 3? self-doping modification has a synergistic effect which is the reason for the effective photo-degradation of methyl orange under simulated solar light irradiation.

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Section: Uv-drs Electron Paramagnetic Resonance (Epr) and Xps Studiessupporting

confidence: 91%

Section: Photo-catalytic Activitymentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Vacuum activation-induced Ti3+ and carbon co-doped TiO2 with enhanced solar light photo-catalytic activity

Zhou

Xing

et al. 2015

Res Chem Intermed

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Ti³⁺ Self‐Doped Dark Rutile TiO₂ Ultrafine Nanorods with Durable High‐Rate Capability for Lithium‐Ion Batteries

Chen

Song

Hou

et al. 2015

Adv Funct Materials

230

119

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Dark‐colored rutile TiO2 nanorods doped by electroconducting Ti3+ have been obtained uniformly with an average diameter of ≈7 nm, and have been first utilized as anodes in lithium‐ion batteries. They deliver a high reversible specific capacity of 185.7 mAh g−1 at 0.2 C (33.6 mA g−1) and maintain 92.1 mAh g−1 after 1000 cycles at an extremely high rate 50 C with an outstanding retention of 98.4%. Notably, the coulombic efficiency of Ti3+–TiO2 has been improved by approximately 10% compared with that of pristine rutile TiO2, which can be mainly attributed to its prompt electron transfer because of the introduction of Ti3+. Again the synergetic merits are noticed when the promoted electronic conductivity is combined with a shortened Li+ diffusion length resulting from the ultrafine nanorod structure, giving rise to the remarkable rate capabilities and extraordinary cycling stabilities for applications in fast and durable charge/discharge batteries. It is of great significance to incorporate Ti3+ into rutile TiO2 to exhibit particular electrochemical characteristics triggering an effective way to improve the energy storage properties.

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Oxygen Vacancies Evoked Blue TiO₂(B) Nanobelts with Efficiency Enhancement in Sodium Storage Behaviors

Zhang

Ding

Foster

et al. 2017

Adv Funct Materials

232

167

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Oxygen vacancies (OVs) dominate the physical and chemical properties of metal oxides, which play crucial roles in the various fields of applications. Density functional theory calculations show the introduction of OVs in TiO2(B) gives rise to better electrical conductivity and lower energy barrier of sodiation. Here, OVs evoked blue TiO2(B) (termed as B‐TiO2(B)) nanobelts are successfully designed upon the basis of electronically coupled conductive polymers to TiO2, which is confirmed by electron paramagnetic resonance and X‐ray photoelectron spectroscopy. The superiorities of OVs with the aid of carbon encapsulation lead to higher capacity (210.5 mAh g−1 (B‐TiO2(B)) vs 102.7 mAh g−1 (W‐TiO2(B)) at 0.5 C) and remarkable long‐term cyclability (the retention of 94.4% at a high rate of 10 C after 5000 times). In situ X‐ray diffractometer analysis spectra also confirm that an enlarged interlayer spacing stimulated by OVs is beneficial to accommodate insertion and removal of sodium ions to accelerate storage kinetics and preserve its original crystal structure. The work highlights that injecting OVs into metal oxides along with carbon coating is an effective strategy for improving capacity and cyclability performances in other metal oxide based electrochemical energy systems.

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An economic method to prepare vacuum activated photocatalysts with high photo-activities and photosensitivities

Abstract: This study reports a simple and economic method to modify Degussa P25 with a vacuum activated procedure, resulting in its high photo-activity and photosensitivity, which suggests this method to be a starting point for the extension of its application to photocatalysis.

Cited by 313 publications

References 32 publications

Vacuum activation-induced Ti3+ and carbon co-doped TiO2 with enhanced solar light photo-catalytic activity

Vacuum activation-induced Ti3+ and carbon co-doped TiO2 with enhanced solar light photo-catalytic activity

Ti³⁺ Self‐Doped Dark Rutile TiO₂ Ultrafine Nanorods with Durable High‐Rate Capability for Lithium‐Ion Batteries

Oxygen Vacancies Evoked Blue TiO₂(B) Nanobelts with Efficiency Enhancement in Sodium Storage Behaviors

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An economic method to prepare vacuum activated photocatalysts with high photo-activities and photosensitivities

Abstract: This study reports a simple and economic method to modify Degussa P25 with a vacuum activated procedure, resulting in its high photo-activity and photosensitivity, which suggests this method to be a starting point for the extension of its application to photocatalysis.

Cited by 313 publications

References 32 publications

Vacuum activation-induced Ti3+ and carbon co-doped TiO2 with enhanced solar light photo-catalytic activity

Vacuum activation-induced Ti3+ and carbon co-doped TiO2 with enhanced solar light photo-catalytic activity

Ti3+ Self‐Doped Dark Rutile TiO2 Ultrafine Nanorods with Durable High‐Rate Capability for Lithium‐Ion Batteries

Oxygen Vacancies Evoked Blue TiO2(B) Nanobelts with Efficiency Enhancement in Sodium Storage Behaviors

Contact Info

Product

Resources

About

Ti³⁺ Self‐Doped Dark Rutile TiO₂ Ultrafine Nanorods with Durable High‐Rate Capability for Lithium‐Ion Batteries

Oxygen Vacancies Evoked Blue TiO₂(B) Nanobelts with Efficiency Enhancement in Sodium Storage Behaviors