Structure and Photocatalysis of TiO&lt;sub&gt;2&lt;/sub&gt;/ZnO Double-Layer Film Prepared by Pulsed Laser Deposition

Zhao, Lei; Xia, Maosheng; Liu, Yuhua; Zheng, Bin; Jiang, Q.; Lian, Jianshe

doi:10.2320/matertrans.m2011345

Cited by 27 publications

(11 citation statements)

References 29 publications

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“…The energy band (Eg) gap value of 3.19 eV est for ZnO rods is well within the range reported of ZnO rods prepared by spray pyr which is lower than that of bulk ZnO (3.37 eV at room temperature). This red-shif be probably due to important differences in the surface states [48]. On the other estimated TiO2/ZnO topcoat energy band gap of 3.19 eV was the same as that of ZnO Upadhyay et al produced ZnO:TiO2 nanocomposite powders by the sol-gel meth found the band gaps of the nanocomposite materials in the range of 3.10-3.30 eV [ Figure 5.…”

Section: Uv-visible Spectroscopy (Uv-vis) Measurementmentioning

confidence: 99%

Immobilized TiO2/ZnO Sensitized Copper (II) Phthalocyanine Heterostructure for the Degradation of Ibuprofen under UV Irradiation

et al. 2021

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Photocatalytic coatings of TiO2/ZnO/CuPc were developed on stainless steel substrates by subsequent sol gel dip coating for TiO2, spray pyrolysis for ZnO, and spin coating for copper (ii) phthalocyanine (CuPc) deposition. The latter compound was successfully prepared using a Schiff-based process. The materials and coatings developed were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy with attached energy dispersive spectroscopy (SEM-EDS), UV-Vis spectroscopy, room temperature photoluminescence (RTPL) spectroscopy, H1-nuclear magnetic resonance (1H-NMR) spectroscopy, C13-nuclear magnetic resonance (13C-NMR) spectroscopy, and matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) mass spectrometry (MS). The as-deposited TiO2/ZnO/CuPc on stainless steel retained in pristine state the structural and morphological/spectroscopic characteristics of its respective components. Estimated energy band gap values were 3.22 eV, 3.19 eV, 3.19 eV for TiO2, ZnO, TiO2/ZnO respectively and 1.60 eV, 2.44 eV, and 2.92 eV for CuPc. The photocatalytic efficiency of the fabricated TiO2/ZnO/CuPc coatings was tested toward ibuprofen (IBF). After 4 h irradiation under 365 nm UV, an increased degradation of about 80% was achieved over an initial 5 mg/L ibuprofen (IBF). This was much higher compared to about 42% and 18% IBF degradation by TiO2/ZnO and TiO2 thin film, respectively. In all cases, the stability of the best-performing photocatalyst was investigated showing a small decline to 77% of IBF degradation after the 5th cycle run. The effect of pH, reactive oxygen species (ROS) probe, shed light on a possible catalytic mechanism that was suggested.

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Section: Uv-visible Spectroscopy (Uv-vis) Measurementmentioning

confidence: 99%

Immobilized TiO2/ZnO Sensitized Copper (II) Phthalocyanine Heterostructure for the Degradation of Ibuprofen under UV Irradiation

et al. 2021

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“…Titanium dioxide is non-toxic, chemically stable, earth-abundant and inexpensive, being considered attractive as a photocatalytic material [6]. TiO 2 photocatalytic activity is directly related to size, specific surface area, impurities on crystalline phase, and the exposed surface facets [7], thus several TiO 2 nano/micro structures were reported in order to improve its final performance [7].…”

Section: Tio 2 As a Photocatalyst Materialsmentioning

confidence: 99%

Photocatalytic Activity of TiO2 Nanostructured Arrays Prepared by Microwave-Assisted Solvothermal Method

Pimentel¹,

Nunes²,

Pereira³

et al. 2016

Semiconductor Photocatalysis - Materials, Mechanisms and Applications

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The use of metal-oxide-semiconductor nanostructures as photocatalytic materials has been an area of intense research over the last decade, and in this field, titanium dioxide TiO receives much attention. TiO is an attractive material since it is stable, insoluble, non-toxic, resistant to corrosion and relatively inexpensive. In this chapter, we will demonstrate the influence of different solvents on the synthesis of TiO nanostructures considering a solvothermal method assisted by microwave radiation and their photocatalytic behaviour. The TiO nanostructured arrays were synthesized on seeded polyethylene naphthalate PEN substrates with different solvents water, ª propanol, ethanol and methanol. TiO thin films deposited by spin-coating were used as seed layer for the nanostructures growth. Structural characterization of the microwave synthesized materials has been carried out by scanning electron microscopy SEM and X-Ray diffraction XRD . The optical properties have also been investigated. The TiO nanostructures arrays were tested as photocatalytic agents in the degradation of pollutant dyes like methylene blue M" in the presence of UV radiation. Expressive differences between the different solvents were detected, in which methanol demonstrated higher M" degradation for the conditions tested.

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“…TiO 2 has a wide band gap semiconductor material which has been under extensive investigations. This is due to its applications in a variety of fields such as photocatalysis [8], dye synthesized solar cell [9], transient photoconductor [10], and others. In addition, recently, semiconductor-based sensors have drawn intense attention and interest.…”

Section: Introductionmentioning

confidence: 99%

Annealing temperature effect on the electrical characteristics and pH sensitivity of TiO<inf>2</inf>/ZnO bilayer films

Rahman

Zulkefle

Rusop

et al. 2015

2015 International Symposium on Technology Management and Emerging Technologies (ISTMET)

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The effect of annealing temperature on the surface morphology and electrical properties of composite bilayer, TiO 2 /ZnO were studied in this investigation. The composite thin films were applied as the sensing membrane of an Extended Gate Field-Effect Transistor (EGFET) based pH sensor. TiO 2 and ZnO were deposited on Indium Tin Oxide (ITO) by using sol-gel spin-coating process. The effects of the varied parameter on the sensor sensitivity and linearity were also investigated. The sensitivity of the TiO 2 thin film towards pH buffer solution was measured by dipping the sensing membrane in pH4, pH7 and pH10 buffer solution. In addition, these thin films were characterized by using Field Emission Scanning Electron Microscope (FESEM) to obtain the surface morphology of the composite thin films. Meanwhile, I-V measurement was done in order to determine the electrical properties of the thin films. According to the result obtained in this experiment, thin film that annealed at highest temperature, which is 500⁰C produced highest sensitivity, 53.3 mV/pH. Relating the I-V characteristic of the thin films and sensitivity, the sensing membrane with higher conductivity gave better sensitivity. Keywords-TiO 2/ ZnO bilayer; EGFET pH sensor; annealing temperature effecttI.

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Structure and Photocatalysis of TiO<sub>2</sub>/ZnO Double-Layer Film Prepared by Pulsed Laser Deposition

Cited by 27 publications

References 29 publications

Immobilized TiO2/ZnO Sensitized Copper (II) Phthalocyanine Heterostructure for the Degradation of Ibuprofen under UV Irradiation

Immobilized TiO2/ZnO Sensitized Copper (II) Phthalocyanine Heterostructure for the Degradation of Ibuprofen under UV Irradiation

Photocatalytic Activity of TiO2 Nanostructured Arrays Prepared by Microwave-Assisted Solvothermal Method

Annealing temperature effect on the electrical characteristics and pH sensitivity of TiO<inf>2</inf>/ZnO bilayer films

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