Luminescence Properties of Cobalt-Doped ZnO Films Prepared by Sol–Gel Method

Xu, Jianping; Shi, Shaobo; Li, Lan; Zhang, Xiaosong; Wang, Youwei; Shi, Qingliang; Li, Shubin; Wang, Hao

doi:10.1007/s11664-013-2719-4

Cited by 26 publications

(12 citation statements)

References 29 publications

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“…In this study, it can be said that Pb contribution led to a decrease in the PL intensity. Similar results have been observed by the Xu et al [46] for Co doped ZnO prepared sol-gel technique. Our PL results can be interpreted as follows:…”

Section: % Of Pbsupporting

confidence: 90%

The effect of Pb doping on the characteristic properties of spin coated ZnO thin films: Wrinkle structures

Yılmaz

Aydoğan

2015

Materials Science in Semiconductor Processing

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Section: % Of Pbsupporting

confidence: 90%

The effect of Pb doping on the characteristic properties of spin coated ZnO thin films: Wrinkle structures

Yılmaz

Aydoğan

2015

Materials Science in Semiconductor Processing

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“…So the band observed at 144 cm –1 can be attributed to lattice vibration and the band around 184 cm –1 due to deformation mode . The band at 331 cm –1 belongs to the phonon scattering peak of the process, which is the overlap of E 2 (H) and E 2 (L) . It can be seen that the peak intensities of the ZnO sample obviously decrease after the ball-milling treatment, while they have a slight increase after the milled ZnO sample was annealed.…”

Section: Results and Discussionmentioning

confidence: 92%

Influence of Defects on the Photocatalytic Activity of ZnO

et al. 2014

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The influence of defects on the photoactivity of ZnO has been revealed. The defects can be formed via ball-milling treatment, and part of the defects can be repaired via annealing treatment. The photocatalytic activity of the ZnO sharply decreased as the ballmilling speed and milling time increased. After the annealing treatment, the photocatalytic activity recovered partly but could not return to the activity of the pristine ZnO. The bulk defects such as oxygen vacancies (V O ), zinc vacancies (V Zn ) and a lot of nonradiative defects were formed after the milling treatment. The annealing treatment can only repair part of the bulk defects and nonradiative defects. Thus, only part of the photoactivity was recovered. The species trapping experiments showed that the introduction of the bulk defects did not change the photocatalytic mechanism. The main oxidative species for the pristine ZnO, the milled ZnO, and the annealed ZnO are photogenerated holes and hydroxyl radicals.

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“…The enhanced luminescence due to the codoping of Gd 3+ was observed in (Y,Gd)BO 3 :Eu 3+ and Fe 3 O 4 @(Y 1– x Gd x ) 2 O 3 :Eu 3+ and attributed to the energy transfer between Gd 3+ and Eu 3+ . On the other hand, Co- and Ni-doping of ZnO was reported to lead to significant PL quenching, , revealing that in doped Zn-containing magnetic oxides there is no doping of the ZnO phase, but rather, there is codoping of Zn 2+ with Co 2+ (or Ni 2+ ) into Fe 3 O 4 . For PPQ–Zn-Co-3, we also observed a blue shift (∼12 nm) of the emission peak, which is often associated with doping, while no shift was seen for PPQ–Zn-Ni-4.…”

Section: Results and Discussionmentioning

confidence: 99%

Enhancing the Catalytic Activity of Zn-Containing Magnetic Oxides in a Methanol Synthesis: Identifying the Key Factors

Baird

Dittmar

Losovyj

et al. 2017

ACS Appl. Mater. Interfaces

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A new family of Ni-, Co-, and Cr-doped Zn-containing magnetic oxide nanoparticles (NPs) stabilized by polyphenylquinoxaline (PPQ) and hyperbranched pyridylphenylene polymer (PPP) has been developed. These NPs have been synthesized by thermal decomposition of Zn and doping metal acetylacetonates in the reaction solution of preformed magnetite NPs, resulting in single-crystal NPs with spinel structure. For the PPQ-capped NPs, it was demonstrated that all three types of metal species (Fe, Zn, and a doping metal) reside within the same NPs, the surface of which is enriched with Zn and a doping metal, while the deeper layers are enriched with Fe. The Cr-doped NPs at the high Cr loading are an exception due to favored deposition of Cr on magnetite located in the NP depth. The PPP-capped NPs exhibit similar morphology and crystallinity; however, the detailed study of the NP composition was barred due to the high PPP amount retained on the NP surface. The catalyst testing in syngas conversion to methanol demonstrated outstanding catalytic properties of doped Zn-containing magnetic oxides, whose activities are dependent on the doping metal content and on the stabilizing polymer. The PPP stabilization allows for better access to the catalytic species due to the open and rigid polymer architecture and most likely optimized distribution of doping species. Repeat experiments carried out after magnetic separation of catalysts from the reaction mixture showed excellent catalyst stability even after five consecutive catalytic runs.

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Luminescence Properties of Cobalt-Doped ZnO Films Prepared by Sol–Gel Method

Cited by 26 publications

References 29 publications

The effect of Pb doping on the characteristic properties of spin coated ZnO thin films: Wrinkle structures

The effect of Pb doping on the characteristic properties of spin coated ZnO thin films: Wrinkle structures

Influence of Defects on the Photocatalytic Activity of ZnO

Enhancing the Catalytic Activity of Zn-Containing Magnetic Oxides in a Methanol Synthesis: Identifying the Key Factors

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