Influence of crystalline phase and defects in the ZrO2 nanoparticles synthesized by thermal plasma route on its photocatalytic properties

Nawale, Ashok B.; Kanhe, Nilesh S.; Bhoraskar, S. V.; Mathe, V. L.; Das, Anath Bandhu

doi:10.1016/j.materresbull.2012.07.010

Cited by 44 publications

(15 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such a behavior may be related to the role of interfacial polarization in the films caused by both electronic and ionic conduction being somewhat higher in the films with higher contribution from more defective metastable ZrO 2 phases, compared to pure monoclinic polymorph, i.e., in this experimental series in the films grown at relatively higher temperatures. ZrO 2 can be stabilized, as known, in the form of metastable polymorphs due to nanocrystallinity, i.e., large contribution from crystallite surfaces, and multiphase material can be regarded as relatively defective one, especially when the contribution from tetragonal/cubic phases is increasing [39,40].…”

Section: Dielectric Performancementioning

confidence: 99%

Atomic layer deposition of zirconium dioxide from zirconium tetrachloride and ozone

et al. 2015

View full text Add to dashboard Cite

Section: Dielectric Performancementioning

confidence: 99%

Atomic layer deposition of zirconium dioxide from zirconium tetrachloride and ozone

et al. 2015

View full text Add to dashboard Cite

“…In an earlier study, the photocatalytic degradation of methylene blue by zirconia particles prepared by thermal plasma route have been correlated with the energy gap of monoclinic and tetragonal phases by Ashok B et al . 3 . Concomitantly, the photocatalytic activity of monoclinic ZrO 2 has been attributed to the effect of oxygen-deficiency, porosity, high crystallinity and density of surface hydroxyl groups by Basahel et al .…”

Section: Introductionmentioning

confidence: 99%

Dominating role of crystal structure over defect chemistry in black and white zirconia on visible light photocatalytic activity

Teeparthi

Awin

Kumar

2018

Sci Rep

126

View full text Add to dashboard Cite

Nanometric powder particles of white zirconia were synthesized through precursor route by the pyrolysis of zirconium (IV) butoxide at varied temperatures in air ranging from 900–1400 °C and were predominantly monoclinic in nature. To control the defect chemistry, the precursor was also pyrolyzed in a reduced atmosphere at 900 °C, eventually resulting in black zirconia. The stabilization of tetragonal phase and observed color change from white to black in samples pyrolyzed under reduced atmosphere was attributed to the creation of oxygen vacancies and disorder. The black and white zirconia produced delineated the influence of crystal structure and oxygen vacancies on the photocatalytic performance. Furthermore, zirconia synthesized at lower temperatures (600 and 800 °C) in air confirmed the detrimental role of tetragonal phase on the degradation behavior of methylene blue dye. High photocatalytic degradation rate for white zirconia was attributed to the presence of increased density of nano-sized pores and low recombination rate of electron-hole pairs as confirmed by PL measurements. Interestingly, black zirconia exemplified relatively limited activity albeit presence of oxygen vacancies. This negative effect was attributed to the presence of tetragonal phase and possibly, the insufficient creation of new energy states near valence and conduction band towards Fermi energy level.

show abstract

“…Nawale et al [ 16 ] synthesized ZrO 2 samples using thermal plasma reactor at different operating pressures. The sample which contained both tetragonal and monoclinic phases synthesized at 1.33 bar of operating pressure showed the highest photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Influence of crystal structure of nanosized ZrO2 on photocatalytic degradation of methyl orange

et al. 2015

View full text Add to dashboard Cite

Nanosized ZrO2 powders with near pure monoclinic, tetragonal, and cubic structures synthesized by various methods were used as catalysts for photocatalytic degradation of methyl orange. The structural and textural properties of the samples were analyzed by X-ray diffraction, Raman spectroscopy, TEM, UV-vis, X-ray photoelectron spectroscopy (XPS), and N2 adsorption measurements. The performance of synthesized ZrO2 nanoparticles in the photocatalytic degradation of methyl orange under UV light irradiation was evaluated. The photocatalytic activity of the pure monoclinic ZrO2 sample is higher than that of the tetragonal and cubic ZrO2 samples under optimum identical conditions. The characterization results revealed that monoclinic ZrO2 nanoparticles possessed high crystallinity and mesopores with diameter of 100 Å. The higher activity of the monoclinic ZrO2 sample for the photocatalytic degradation of methyl orange can be attributed to the combining effects of factors including the presence of small amount of oxygen-deficient zirconium oxide phase, high crystallinity, large pores, and high density of surface hydroxyl groups.

show abstract

Influence of crystalline phase and defects in the ZrO2 nanoparticles synthesized by thermal plasma route on its photocatalytic properties

Cited by 44 publications

References 40 publications

Atomic layer deposition of zirconium dioxide from zirconium tetrachloride and ozone

Atomic layer deposition of zirconium dioxide from zirconium tetrachloride and ozone

Dominating role of crystal structure over defect chemistry in black and white zirconia on visible light photocatalytic activity

Influence of crystal structure of nanosized ZrO2 on photocatalytic degradation of methyl orange

Contact Info

Product

Resources

About