Multi-applicative tetragonal TiO2/SnO2 nanocomposites for photocatalysis and gas sensing

Patil, Satish; Dhodamani, Ananta G.; Vanalakar, S.A.; Deshmukh, S. B.; Delekar, Sagar D.

doi:10.1016/j.jpcs.2017.12.020

Cited by 73 publications

(21 citation statements)

References 58 publications

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“…Recently, some studies have reported the mixing of TiO 2 with various metal oxides such as the coupling of TiO 2 with SnO 2 which has attracted a particular attention. According to the literature, the studies of TiO 2 :SnO 2 are mainly devoted to gas sensors and photocatalytic applications [11]. Very few works deal with the detailed evaluation of the physical properties, in particular the optical and the structural ones.…”

Section: Introductionmentioning

confidence: 99%

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Medjaldi

Bouabellou

Bouachiba

et al. 2020

Mater. Res. Express

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In this research TiO 2 , SnO 2 and TiO 2 :SnO 2 nanocomposite thin films were fabricated by the sol-gel dip coating technique. The mixture was prepared by varying the molar ratio of SnO 2 to TiO 2 , i.e. TiO 2 :SnO 2 (9:1), TiO 2 :SnO 2 (8:2) and TiO 2 :SnO 2 (6:4)). The obtained samples were characterized by means of the Raman microscopy, Scanning Electron Microscopy (SEM), UV-Vis spectrophotometry and m-lines spectroscopy (Prism coupler). Raman analysis shows that pure TiO 2 and SnO 2 thin films are characterized by the vibrational modes of anatase and rutile cassiterite, respectively. Furthermore, the Raman spectra of the TiO 2 :SnO 2 nanocomposites show the presence of a mixture of anatase and rutile TiO 2 phases. The SEM images reveal that the morphology is clearly modified with SnO 2 content. The ripples in the transmittance spectra decreased with increasing SnO 2 content. Also, the evolution of the optical band gap seems to be consistent with the Raman analysis. A great attention has been paid to the refractive index measurements by the prism coupler technique. In this way, variable-refractive index systems have been successfully obtained using TiO 2 :SnO 2 nanocomposite thin films.

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Section: Introductionmentioning

confidence: 99%

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Medjaldi

Bouabellou

Bouachiba

et al. 2020

Mater. Res. Express

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“…[13] Therefore, new effective andl ow-costing technologiesw ith the ability to solve energy and environmental pollution problemsa re required. [17][18][19][20][21][22] Figure 1d escribes the principle of semiconductor photocatalysis. [16] This technique has aw ide range of applications, including the photodegradation of pollu-tants and heavy metals, water disinfection, hydrogen generation, the photoreduction of carbon dioxide, photoelectric sensing, and photodynamic therapy.…”

Section: Introductionmentioning

confidence: 99%

“…[16] This technique has aw ide range of applications, including the photodegradation of pollu-tants and heavy metals, water disinfection, hydrogen generation, the photoreduction of carbon dioxide, photoelectric sensing, and photodynamic therapy. [17][18][19][20][21][22] Figure 1d escribes the principle of semiconductor photocatalysis. The absorption of a photon by the semiconductor (hv !…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

et al. 2018

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Environmental and energy problems have drawn much attention owing to rapid population growth and accelerated economic development. For instance, photocatalysis, "a green technology", plays an important role in solar-energy conversion owing to its potential to solve energy and environmental problems. Recently, many efforts have been devoted to improving visible-light photocatalytic activity by using titanium dioxide as a photocatalyst as a result of its wide range of applications in the energy and environment fields. However, fast charge recombination and an absorption edge in the UV range limit the photocatalytic efficiency of TiO under visible-light irradiation. Many investigations have been undertaken to overcome the limitations of TiO and, therefore, to enhance its photocatalytic activity under visible light. The present literature review focuses on different strategies used to promote the separation efficiency of electron-hole pairs and to shift the absorption edge of TiO to the visible region. Current synthesis techniques used to elaborate several nanostructures of TiO -based materials, recent progress in enhancing visible photocatalytic activity, and different photocatalysis applications will be discussed. On the basis of the studies reported in the literature, we believe that this review will help in the development of new strategies to improve the visible-light photocatalytic performance of TiO -based materials further.

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“…The specific surface area of 0.5% Pt‐functionalized TiO 2 has increased when comparing with that of pure TiO 2 , for the specific surface area is calculated to be 168.10 and 147.17 m 2 g −1 , respectively. The numeric values are higher than that of ZnO, SnO 2 , and Fe 2 O 3 materials as gas‐sensing materials reported in other literature . This might be a point to explain the reason why 0.5% Pt‐functionalized TiO 2 based gas sensor shows more superior gas‐sensing performance than pure TiO 2 .…”

Section: Resultsmentioning

confidence: 67%

Pt‐Functionalized Nanoporous TiO₂ Nanoparticles With Enhanced Gas Sensing Performances Toward Acetone

Xing

Chen

Yang

et al. 2018

Physica Status Solidi (a)

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A facile hydrothermal method is used to prepare Pt-functionalized nanoporous TiO 2 nanoparticles. These are used as gas-sensing material in sensors, fabricated according to the indirect heating method. Gas-sensing performance of the sensors is investigated by testing their gas response to acetone, which exhibits favorable selectivity, good gas response value, fast response/recovery time, low detection concentration and good long-term stability to acetone. Gas response β was defined as the ratio of R a /R g , where R a and R g are the resistance values of gas sensor exposed in air and objective gas, respectively. Among all these as-prepared gas sensors, the 0.5% Pt-functionalized TiO 2 based gas sensor shows the highest gas response value of 29.51-200 ppm acetone at 300 C, and the gas response value is 5.2 times higher than that (5.67) of pure TiO 2 based gas sensor. It also has excellent selectivity to acetone when comparing with toluene, n-butanol, isopropanol, ethanol, and methanol. The large specific surface area (168.101 m 2 g À1 ) provides enough contacting interface between gas and the as-prepared materials, then the gas molecules could be broken into CO 2 and H 2 O by the active adsorbed oxygen species. The present results of the Ptfunctionalized TiO 2 based gas sensors illustrates their potential application in detecting acetone.

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Multi-applicative tetragonal TiO2/SnO2 nanocomposites for photocatalysis and gas sensing

Cited by 73 publications

References 58 publications

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

Pt‐Functionalized Nanoporous TiO₂ Nanoparticles With Enhanced Gas Sensing Performances Toward Acetone

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Multi-applicative tetragonal TiO2/SnO2 nanocomposites for photocatalysis and gas sensing

Cited by 73 publications

References 58 publications

Study of TiO2, SnO2 and nanocomposites TiO2:SnO2 thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Study of TiO2, SnO2 and nanocomposites TiO2:SnO2 thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

Pt‐Functionalized Nanoporous TiO2 Nanoparticles With Enhanced Gas Sensing Performances Toward Acetone

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Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Pt‐Functionalized Nanoporous TiO₂ Nanoparticles With Enhanced Gas Sensing Performances Toward Acetone