Controlling surface and interface of TiO2 toward highly efficient photocatalysis

Pan, Lun; Zhang, Xiangwen; Wang, Li; Zou, Ji‐Jun

doi:10.1016/j.matlet.2015.06.109

Cited by 25 publications

(9 citation statements)

References 38 publications

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“…531.3 eV, which is attributed to O-P species. 3 The photoluminescence (PL) spectra of Ag 3 PO 4 and Ag 3 PO 4 QDs-TiO 2 NS composites are tested (Fig. 4f).…”

Section: Surface Compositionmentioning

confidence: 99%

“…[1][2][3] In order to effectively utilize the visible light, a range of photocatalysts have been designed and fabricated, such as Ag 3 PO 4 , CdS, WO 3 , C 3 N 4 , doped TiO 2 or ZnO, and so on. [1][2][3] In order to effectively utilize the visible light, a range of photocatalysts have been designed and fabricated, such as Ag 3 PO 4 , CdS, WO 3 , C 3 N 4 , doped TiO 2 or ZnO, and so on.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of TiO₂ nanosheets via Ti³⁺ doping and Ag₃PO₄ QD sensitization for highly efficient visible-light photocatalysis

Hong

Pan

et al. 2016

RSC Adv.

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a Visible-light photocatalysis has attracted much attention in environment remediation and sustainable energy utilization, however, it is still a great challenge to develop highly efficient and stable visible-light photocatalyst. Herein, we developed Ag3PO4 quantum dots (QDs) sensitized and Ti 3+ -doped TiO2 nanosheets (NS) via a solvethermal/in-situ precipitation method. The TiO2/Ag3PO4 ratio in the composite was tuned from 3:1 to 1:4 to optimize the dispersion and size of Ag3PO4 QD, and the best dispersed Ag3PO4 QDs with smallest size (ca. 2 nm) was obtained for TA1:3. The characterizations confirm that abundant Ti 3+ defects are introduced into TiO2, and the interaction between Ag3PO4 QDs and TiO2 NS is in the form of Ag-O-Ti bonds, which benefit the visible-light absorption and accelerates the charge separation. Moreover, the wellmatched band structures drive the electrons to Ag3PO4 and holes to TiO2 {001} faces, respectively. Therefore, TA1:3 shows 1.7-fold, 1.4-fold and 5-fold higher activity than bulk Ag3PO4 in MO, phenol photodegradation, and PEC water splitting, respectively. In addition, the sample shows relatively high photostability. Thus, we believe that the rational design of heterostructure based on the matched band and abundant defects can fabricate the highly reactive photocatalysts.

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“…531.3 eV, which is attributed to O-P species. 3 The photoluminescence (PL) spectra of Ag 3 PO 4 and Ag 3 PO 4 QDs-TiO 2 NS composites are tested (Fig. 4f).…”

Section: Surface Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of TiO₂ nanosheets via Ti³⁺ doping and Ag₃PO₄ QD sensitization for highly efficient visible-light photocatalysis

Hong

Pan

et al. 2016

RSC Adv.

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“…Titanium dioxide (TiO 2 ) has been studied extensively by the global material and device research community for multi‐functional applications due to its attractive chemical, optical, and electrical properties along with high chemical stability, low cost, and non‐toxicity . Being a wide band‐gap material with significant optical transmittance, the TiO 2 films are potentially used in photovoltaic cells, anti‐reflective (AR) coatings, environmental remediation, water splitting, gas sensors, electrochromic displays, and planar waveguides . Also, the significantly high dielectric constant of TiO 2 has made it a promising alternative to substitute silicon dioxide in the complementary‐metal‐oxide‐semiconductor (CMOS) based technology for superior electrostatic integrity .…”

Section: Introductionmentioning

confidence: 99%

Formation of High‐Pressure Phase of Titanium Dioxide (TiO₂‐II) Thin Films by Vapor‐Liquid‐Solid Growth Process on GaAs Substrate

Das

Chowdhury

Saha

et al. 2018

Physica Status Solidi (a)

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In this work, the high pressure phase of titanium dioxide (TiO2‐II) film is grown with vapor‐liquid‐solid (VLS) method on <100>‐GaAs substrate by utilizing the natural process‐induced‐strain, originating from the thermo‐elastic mismatch between TiO2 and GaAs in VLS process. The mismatches in thermal expansion coefficient and elastic constant of TiO2 and GaAs are Δα≈55% and ΔY≈170% which incorporate a substantial amount of stress (≈GPa) during cooling from the growth temperature (500 °C). SEM imaging suggests the formation of a continuous film and cross‐sectional TEM image confirmed its high crystalline quality. XRD peaks at 2θ = 31.300 and 58.670 confirm the formation of [111] and [212]‐planes of TiO2‐II phase and its chemical states are analyzed from X‐ray photoelectron spectroscopy (XPS) measurements. The bandgap of TiO2‐II phase is estimated to be 2.88 eV from cathodoluminescence study for the first time which agrees satisfactorily with the theoretical predictions reported.

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“…The photocatalysis of titanium dioxide (TiO 2 ) is an advanced oxidation method that can efficiently be applied in the treatment of a variety of environmental pollutants [4][5][6][7][8][9]. Nevertheless, the environmental application of TiO 2 is obstructed by a wide band gap, which is restricted to the ultraviolet (UV) region [6,8,10].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the environmental application of TiO 2 is obstructed by a wide band gap, which is restricted to the ultraviolet (UV) region [6,8,10]. Photocatalysis of TiO 2 is also hampered by high recombination rates of charge carriers, thus resulting in a low quantum yield [6].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

Lee¹,

Jo²

2017

Catalysts

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This study assessed 3D WO 3 -TiO 2 nanoflowers (WTNF) synthesized by a combined hydrothermal-ultrasonication-impregnation method for their applicability to the treatment of aromatic volatile compounds under visible-light illumination. The scanning electron microscopy exhibited the formation of 3D structures in the prepared WTNF samples. The X-ray diffraction patterns and energy dispersive X-ray results indicated a successful incorporation of WO 3 into TNF structures. The UV-visible spectroscopy showed that the prepared WTNF samples can be functioned under visible light irradiation. The output-to-input concentration ratios of toluene and o-xylene with WTNF samples were lower than those of TiO 2 nanoflowers. These findings were illustrated on the basis of charge separation ability, adsorption capability, and light absorption of the sample photocatalysts. The input-to-output concentration ratios of the target chemicals were lowest for 10 M NaOH and highest for 5 M NaOH. The photocatalytic degradation efficiencies of WTNF sample photocatalysts increased with increasing WO 3 content from 0.1% to 1.0%, and dropped gradually with increasing WO 3 content further to 4.0%. Light-emitting-diodes (LEDs) are a more highly energy-efficient light source compared to a conventional lamp for the photocatalytic degradation of toluene and o-xylene, although the photocatalytic activity is higher for the conventional lamp.

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Controlling surface and interface of TiO2 toward highly efficient photocatalysis

Cited by 25 publications

References 38 publications

Fabrication of TiO₂ nanosheets via Ti³⁺ doping and Ag₃PO₄ QD sensitization for highly efficient visible-light photocatalysis

Fabrication of TiO₂ nanosheets via Ti³⁺ doping and Ag₃PO₄ QD sensitization for highly efficient visible-light photocatalysis

Formation of High‐Pressure Phase of Titanium Dioxide (TiO₂‐II) Thin Films by Vapor‐Liquid‐Solid Growth Process on GaAs Substrate

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

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Controlling surface and interface of TiO2 toward highly efficient photocatalysis

Cited by 25 publications

References 38 publications

Fabrication of TiO2 nanosheets via Ti3+ doping and Ag3PO4 QD sensitization for highly efficient visible-light photocatalysis

Fabrication of TiO2 nanosheets via Ti3+ doping and Ag3PO4 QD sensitization for highly efficient visible-light photocatalysis

Formation of High‐Pressure Phase of Titanium Dioxide (TiO2‐II) Thin Films by Vapor‐Liquid‐Solid Growth Process on GaAs Substrate

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

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Fabrication of TiO₂ nanosheets via Ti³⁺ doping and Ag₃PO₄ QD sensitization for highly efficient visible-light photocatalysis

Fabrication of TiO₂ nanosheets via Ti³⁺ doping and Ag₃PO₄ QD sensitization for highly efficient visible-light photocatalysis

Formation of High‐Pressure Phase of Titanium Dioxide (TiO₂‐II) Thin Films by Vapor‐Liquid‐Solid Growth Process on GaAs Substrate