Are aluminium titanate-based nanostructures new photocatalytic materials? Possibilities and perspectives

Bakhshandeh, Fatemeh; Azarniya, Abolfazl; Hosseini, Hamid Reza Madaah; Jafari, Saman

doi:10.1016/j.jphotochem.2017.11.043

Cited by 22 publications

(11 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, Ag, Cu, Au, N, Sr, Ba, and Ca doped LT materials in the form of bulk, nanoparticles, nanocomposites, thin films, and polymers were studied at length to discuss structure, optical, physical, magnetic, electrical, ferroelectric, piezoelectric, and other chemical properties [16][17][18][19][20][21][22][23][24][25][26][27]. In the same fashion, the aluminium titanate was prepared for evaluating the photocatalysis, biomedical, electrical and physical properties [28][29][30][31][32]. These results evidenced the tetragonal structure of aluminium titanate.…”

Section: Introductionmentioning

confidence: 99%

Induced dielectric behavior in high dense AlxLa1-xTiO3 (x = 0.2–0.8) nanospheres

Dastagiri¹,

Lakshmaiah²,

Naidu

et al. 2019

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

The present work focussed on the preparation and characterization of Al x La 1−x TiO 3 (x = 0.2-0.8) (ALTO) nanospheres. The phase purity and tetragonal structure was confirmed using the X-ray diffraction patterns. In addition, the dimensions of the ALTO unit cell were decreased with increase of Al-content. The morphological investigations evidenced the formation of spherical grains and particles of nano size. The UV-Visible spectra revealed the increasing trend of band gap (E g) from 3.341 to 3.378 eV as a function 'x'. Besides, the frequency, and compositional variation of dielectric parameters was described. Subsequently, the space charge polarization, and electrical conduction mechanisms were well understood using the complex dielectric modulus, and impedance spectroscopy. The Cole-Cole plots ensured that the ALTO materials exhibited the semiconducting nature due to the formation of complete semicircular arcs. Moreover, the non-Debye type relaxations were noticed in Cole-Cole plots.

show abstract

Section: Introductionmentioning

confidence: 99%

Induced dielectric behavior in high dense AlxLa1-xTiO3 (x = 0.2–0.8) nanospheres

Dastagiri¹,

Lakshmaiah²,

Naidu

et al. 2019

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…Once the constituent phases and the processing conditions are chosen, the phase proportion becomes one of the most important processing variables [10]. Low, null or negative thermal expansion ceramic materials have drawn attention for several decades [11][12][13][14]; and proposed for high thermomechanical demand applications. Aluminum titanate (AT= Al 2 TiO 5 ) is a material with a very low thermal expansion coefficient, excellent thermal shock resistance, very low thermal conductivity (approximately 1.5 Wm −1 K −1 ) and high melting point (about 1860 • C).…”

Section: Introductionmentioning

confidence: 99%

Low (and negative) thermal expansion Al2TiO5 materials and Al2TiO5 - 3Al2O3.2SiO2 - ZrTiO4 composite materials. Processing, initial zircon proportion effect, and properties

Violini

Hernández

Gauna

et al. 2018

Ceramics International

View full text Add to dashboard Cite

Aluminum titanate (Al 2 TiO 5) materials and aluminum titanate-mullite-zirconium titanate (Al 2 TiO 5-3Al 2 O 3 .2SiO 2-ZrTiO 4) composite materials were successfully processed from fine commercial powders and characterized. This was achieved by zircon (ZrSiO 4) addition to stoichiometric alumina-titania mixtures. Zircon addition was the principal processing variable explored. This additive stabilizes the unstable aluminum titanate phase, enhances the sintering process, restricts microcrack development and improves the mechanical properties of the bulk material, but has a slight detrimental effect on its thermal expansion behavior (α app from-1.5 to 2.5 x 10-6 °C-1 in the RT-800 °C range). With a clear microstructure configuration change, all the technological properties are directly (linearly) correlated with zircon proportion in the initial formulation in the range between 5 and 30 wt%. Developed phases were established, relatively dense ceramics were produced, and complex microstructures with multiphasic interlocked grains were identified. Also, an interconnected microcrack matrix was observed with no material integrity loss which explained the low or even negative thermal expansion behaviors observed in the developed materials. This, together with the mechanical behavior detected, encourages structural applications with high thermomechanical solicitations. The triplex composite material presented an excellent thermomechanical behavior and low porosity, 48 MPa flexural strength, low stiffness and high sintering grade with low thermal expansion.

show abstract

“…22) (E g = 4.5 eV) but higher than that found by Bakhshandeh. 7) According to Bakhshandeh et al, the E g value of ATO-rich powder, preparated from tetrabutexide and aluminum chloride, dependent on calcination temperature (8501000°C) is in the range 2.893.75 eV. The reduction in the band gap energy of ATO materials was explained by the lack of oxygen creating the trapping levels.…”

Section: Characteristics Of Ato-700-3mentioning

confidence: 99%

“…5) By sol-gel method, Sobhani et al 6) also successfully synthesized ATO nanoparticles with the size of 70 nm over 900°C using aluminum chloride and titanium tetrabutoxide. Another work, 7) nanostructured ATO-rich powder was prepared by the sol-gel method at 900°C from titanium butoxide and aluminum chloride owning the band gap energy of 2.89 eV, the specific surface area of 21.1 m 2 g ¹1 and methylene blue degradation of 56.3% after 2 h. In general, ATO was virtually synthesized by sol-gel method at high temperature (²900°C). Thus, a technique for the formation of ATO at low temperature has been interested.…”

Section: Introductionmentioning

confidence: 99%

A Low Temperature Fabrication and Photoactivity of Al<sub>2</sub>TiO<sub>5</sub> in Cinnamic Acid Degradation

Trung

Tri

et al. 2019

Mater. Trans.

View full text Add to dashboard Cite

Aluminum titanate was fabricated by sol-gel method using aluminium nitrate, titanium isopropoxide as precursors and citric acid as a complexing reagent. Effects of calcination temperature, citric acid content and calcination duration on the formation of Al 2 TiO 5 (ATO) phase were investigated by X-ray diffraction. The results showed that the ATO-rich mixture with traces of anatase TiO 2 was obtained at low calcination temperature (700°C). The properties of obtained ATO were characterized by various methods such as FTIR, N 2 isotherm adsorption, DRS, SEM, TEM, and TGA. The point of zero charge of sample was also determined by salt addition method. Owning band gap energy of 3.42 eV the nanostructured ATO could be activated by UV light to become photocatalyst. Indeed, at favorable reaction conditions, detected from the experiment, the obtained ATO gave the photodegradation efficiency of cinnamic acid (CA) approximately 90% after 6 h. ATO also showed high stability and easily separated from solution, consequently after 9 times of reusing the CA degradation extent lightly decreased about 20%.

show abstract

Are aluminium titanate-based nanostructures new photocatalytic materials? Possibilities and perspectives

Cited by 22 publications

References 42 publications

Induced dielectric behavior in high dense AlxLa1-xTiO3 (x = 0.2–0.8) nanospheres

Induced dielectric behavior in high dense AlxLa1-xTiO3 (x = 0.2–0.8) nanospheres

Low (and negative) thermal expansion Al2TiO5 materials and Al2TiO5 - 3Al2O3.2SiO2 - ZrTiO4 composite materials. Processing, initial zircon proportion effect, and properties

A Low Temperature Fabrication and Photoactivity of Al<sub>2</sub>TiO<sub>5</sub> in Cinnamic Acid Degradation

Contact Info

Product

Resources

About