2018
DOI: 10.1038/s41598-018-23648-0
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Dominating role of crystal structure over defect chemistry in black and white zirconia on visible light photocatalytic activity

Abstract: 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 attribute… Show more

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Cited by 143 publications
(62 citation statements)
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“…The area under the peak gives a relative oxygen vacancy of 52% (assuming negligible amount of OH adsorption) on the surface of ZrO 2 . The presence of oxygen vacancies is also confirmed through EPR analysis (g value of 1.992) 51 (Fig. S6).…”
Section: Resultsmentioning
confidence: 63%
See 1 more Smart Citation
“…The area under the peak gives a relative oxygen vacancy of 52% (assuming negligible amount of OH adsorption) on the surface of ZrO 2 . The presence of oxygen vacancies is also confirmed through EPR analysis (g value of 1.992) 51 (Fig. S6).…”
Section: Resultsmentioning
confidence: 63%
“…This separation combined with the reduced band gap helps in harnessing visible light for photocatalysis 59,60 . Albeit the detrimental contribution t-ZrO 2 towards photocatalytic activity 51 , the formation of heterojunctions as well as the retention of nanodomains of t-ZrO 2 with an average size of 10 nm in an amorphous matrix is believed to enhance the catalytic activity. The degradation mechanism and the heterojunction formation are exemplified in Figs.…”
mentioning
confidence: 99%
“…To clearly determine the kinetics of degradation of MB by the synthesized catalysts, the obtained experimental data were fitted with the pseudo-first-order model, ln(C0/C) = kt, where C0 represents the initial conc., C signifies the conc. at time t, and k represents the first-order rate constant ( Figure 10) [41]. All plots of ln(C0/C) against time demonstrated a linear fit, and the slope of the linear regression is equal to the first-order apparent rate constant (K).…”
Section: Photocatalytic Activity Evaluation Of Mbmentioning
confidence: 99%
“…To clearly determine the kinetics of degradation of MB by the synthesized catalysts, the obtained experimental data were fitted with the pseudo-first-order model, ln(C 0 /C) = kt, where C 0 represents the initial conc., C signifies the conc. at time t, and k represents the first-order rate constant ( Figure 10) [41]. To clearly determine the kinetics of degradation of MB by the synthesized catalysts, the obtained experimental data were fitted with the pseudo-first-order model, ln(C0/C) = kt, where C0 represents the initial conc., C signifies the conc.…”
Section: Photocatalytic Activity Evaluation Of Mbmentioning
confidence: 99%
“…This progress respites the photocatalytic activity might also increase since the coupling of NMs with dissimilar bandgap supporting the electron-hole charge separation as in the instance of metal oxide (MO) per several heterojunctions. The photocatalytic performance of the as-prepared 4% Y:SnO 2 PCs was compared with recently reported PCs with different semiconductor metal oxides/metal and auxiliary nanocomposites, as shown in Table 1 (Rashad et al 2014;Wang et al 2018;Patil et al 2018;Benzaouak et al 2018;Teeparthi et al 2018).…”
Section: Photocatalytic Performance and Carrier Concentrationmentioning
confidence: 99%