Microstructural and photoluminescence properties of sol–gel derived Tb3+ doped ZnO nanocrystals

Kabongo, Guy L.; Mhlongo, G.H.; Malwela, Thomas; Mothudi, B.M.; Hillie, K.T.; Dhlamini, M.S.

doi:10.1016/j.jallcom.2013.12.075

Cited by 56 publications

(33 citation statements)

References 57 publications

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“…It confirms an effective substitution of Zn 2 þ ions with Cd 2 þ ions in the Zn 1 À x Cd x O samples [24,25]. It is also observed that, the intensity of these peaks decreases with Cd doping.…”

Section: Resultssupporting

confidence: 66%

Tailoring the structural and optical properties of ZnO by doping with Cd

Rana

Chand

Gathania

2015

Ceramics International

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Section: Resultssupporting

confidence: 66%

Tailoring the structural and optical properties of ZnO by doping with Cd

Rana

Chand

Gathania

2015

Ceramics International

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“…The continuous decrease in intensity of all modes confirms the existence of strain induced from doping . These observations are consistent with previous reports …”

Section: Resultssupporting

confidence: 93%

“…Therefore, E 2H is particularly characteristic of the hexagonal wurtzite structure of ZnO and presence of this prominent peak in the Cu doped ZnO samples confirms the good crystallinity even with doping . It can be seen from Figure that E 2H peak shifted toward low wavenumbers denoting substitution of Zn 2+ ions with Cu 2+ ions . The continuous decrease in intensity of all modes confirms the existence of strain induced from doping .…”

Section: Resultsmentioning

confidence: 64%

Rapid, controllable, one‐pot and room‐temperature aqueous synthesis of ZnO:Cu nanoparticles by pulsed UV laser and its application for photocatalytic degradation of methyl orange

et al. 2017

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Zinc oxide (ZnO) and ZnO:Cu nanoparticles (NPs) were synthesized using a rapid, controllable, one-pot and room-temperature pulsed UV-laser assisted method. UV-laser irradiation was used as an effective energy source in order to gain better control over the NPs size and morphology in aqueous media. Parameters effective in laser assisted synthesis of NPs such as irradiation time and laser shot repetition rate were optimized. Photoluminescence (PL) spectra of ZnO NPs showed a broad emission with two trap state peaks located at 442 and 485 nm related to electronic transition from zinc interstitial level (I ) to zinc vacancy level (V ) and electronic transition from conduction band to the oxygen vacancy level (V ), respectively. For ZnO:Cu NPs, trap state emissions disappeared completely and a copper (Cu)-related emission appeared. PL intensity of Cu-related emission increased with the increase in concentration of Cu , so that for molar ratio of Cu:Zn 2%, optimal value of PL intensity was obtained. The photocatalytic activity of Cu-doped ZnO revealed 50 and 100% increasement than that of undoped NPs under UV and visible irradiation, respectively. The enhanced photocatalytic activity could be attributed to smaller crystal size, as well as creation of impurity acceptor levels (T ) inside the ZnO energy band gap.

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“…For the emission spectra of Tb(OH) 3 , broad peaks are found at ∼460-480 nm. No peaks attributed to 5 D 4 → 7 F J (J = 3, 4, 5, 6) transitions of Tb 3+ appeared, similar to previous reports (Domaradzki et al, 2009;Pal & Manam, 2013;Ayvackl et al, 2014;Kabongo et al, 2014). The emission spectra of the Tb-Mag-n (n = 1, 2, 3) show obvious emissions due to the 5 D 4 → 7 F J (J = 3, 4, 5, 6) transitions of Tb 3+ .…”

Section: Photoluminescencesupporting

confidence: 88%

Intercalation of Tb(III) into magadiite and characterization of Tb-intercalated magadiites

et al. 2016

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The intercalation of Tb(III) into layered magadiite is achieved by three-step ion exchanges with H+/Na+, TBA+ (tetra-n-butylammonium ions)/H+ and Tb(EDTA)3+/TBA+. Various techniques, including powder X-ray diffraction (XRD), scanning electron microscopy equipped with energy dispersive X-ray (SEM-EDX), thermogravimetric and differential thermogravimetry (TG-DTG), Fourier transform infrared (FTIR) spectroscopy, and photoluminescent spectroscopy (PL), were employed to characterize the Tb-intercalated magadiites. The XRD results revealed that the basal spacing of the Tb-intercalated magadiites was obviously larger than that of the Na-magadiite, confirming the intercalation. The IR spectra showed no bands attributable to EDTA in the Tb-intercalated magadiites, indicating that the EDTA has broken away from Tb(III)-ETDA complexes during ion exchange. Moreover, the basal spacing of Tb-intercalated magadiite tends to increase slightly with the increase in water content in the Tb-intercalated magadiite. The PL spectra show weak emissions, attributed to 5D4-7FJ (J = 3, 4, 5, 6) transitions of Tb3+.

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Microstructural and photoluminescence properties of sol–gel derived Tb3+ doped ZnO nanocrystals

Cited by 56 publications

References 57 publications

Tailoring the structural and optical properties of ZnO by doping with Cd

Tailoring the structural and optical properties of ZnO by doping with Cd

Rapid, controllable, one‐pot and room‐temperature aqueous synthesis of ZnO:Cu nanoparticles by pulsed UV laser and its application for photocatalytic degradation of methyl orange

Intercalation of Tb(III) into magadiite and characterization of Tb-intercalated magadiites

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