Morphological and optical property study of Li doped ZnO produced by microwave-assisted solvothermal synthesis

Ščajev, Patrik; Durena, Ramona; Onufrijevs, Pāvels; Miasojedovas, S.; Malinauskas, T.; Stanionytė, Sandra; Žarkov, Aleksej; Zukuls, Anzelms; Bite, Ivita; Šmits, Krišjānis

doi:10.1016/j.mssp.2021.106069

Cited by 19 publications

(11 citation statements)

References 39 publications

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“…Compared to traditional solvothermal methods, microwave‐assisted heating is fast, uniform, and controllable. [ 28 ] Although not all solvents are suitable for microwave heating, N , N ‐dimethyl formamide (DMF), a typical ambient solution for Ti substitution, can be heated using microwave because of dipolar interaction and ionic conduction. [ 29 ] In addition, the vibration of the polar Ti‐source material in the microwave field may promote the entry of Ti into the MOF crystal to replace Zr.…”

Section: Introductionmentioning

confidence: 99%

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH₂ with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Liu

Huang

Jia

et al. 2023

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Efficient nitric oxide (NO) removal without nitrogen dioxide (NO2) emission is desired for the control of air pollution. Herein, a series of (Zr/Ti)UiO‐66‐NH2 with congenetic shell–core structure, denoted as Ti‐UION, are rapidly synthesized by microwave‐assisted post‐synthetic modification for NO removal. The optimal Ti‐UION (i.e., 2.5Ti‐UION) exhibits the highest activity of 80.74% without NO2 emission with moisture, which is 21.65% greater than that of the UiO‐66‐NH2. The NO removal efficiency of 2.5Ti‐UION further increases to 95.92% without photocatalyst deactivation under an anhydrous condition. This is because selectively produced NO2 in photocatalysis is completely adsorbed into micropores, refreshing active sites for subsequent reaction. In addition, the enhanced photocatalytic activity after Ti substitution is due to the presence of Ti electron acceptor, the potential difference between the shell and core of Ti‐UION crystal, and the high conductivity of TiO units. Additionally, the improved adsorption of gas molecules not only favors NO oxidation, but also avoids the emission of NO2. This work provides a feasible strategy for rapid metal substitution in metal‐organic frameworks and insights into enhanced NO photodegradation.

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Section: Introductionmentioning

confidence: 99%

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH₂ with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Liu

Huang

Jia

et al. 2023

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“…With 0.25 wt% C 60 doping, the value of micro-strain decreases which depicts the reduced density of crystalline defects. 31 Whereas, on increasing the doping amount of C 60 the micro-strain further shows increment which is the signature of lattice distortion. 31 Thus, it is evident that the incorporation of C 60 into ZnO films diminishes various lattice and micro-structural defects which alternatively changes its structural properties and may be responsible for other properties as well.…”

Section: Resultsmentioning

confidence: 99%

“…31 Whereas, on increasing the doping amount of C 60 the micro-strain further shows increment which is the signature of lattice distortion. 31 Thus, it is evident that the incorporation of C 60 into ZnO films diminishes various lattice and micro-structural defects which alternatively changes its structural properties and may be responsible for other properties as well. 30 2D and 3D AFM micrographs of pristine ZnO and C 60 modified ZnO films are presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Microstructural, Optical, and Work Function Tuning of Fullerene (C₆₀) Modified Zinc Oxide Films for Optoelectronic Devices

Pandey¹,

Garg²,

Kumar³

2022

ECS J. Solid State Sci. Technol.

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Here, we report the synthesis of pristine and fullerene (C60) modified zinc oxide (ZnO) films by the sol-gel method. The incorporation of C60 in pristine ZnO films modifies its structural, surface morphological, optical, and electrical properties. Structural characterization suggests that pristine and C60 modified ZnO films exhibit Wurtize crystal structure. Surface morphological characterization demonstrates that incorporation of C60 into ZnO leads to the formation of spherical nano-particles which varies on the doping of C60. The properties of C60 doped ZnO films show a reduction in the bandgap values with enhanced optical absorption and photoluminescence properties. Further, the surface potential and work function of pristine and C60 incorporated ZnO films, as investigated by Kelvin probe force microscopy (KPFM) show tuning of Fermi level in pristine and C60 modified ZnO films. Also, C60 modified ZnO Schottky diodes exhibited enhanced carrier mobility with better charge transport properties.

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“…Time-resolved spectroscopy of organic and inorganic materials is of high importance for the improvement and development of optoelectronic devices and scintillators [1][2][3][4][5][6]. Typically, high repetition rate pulses are applied to the material and then photoluminescence (PL) spectra decays are monitored [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Cost-efficient single photon-sensitive nanosecond gated spectrometer based on commercial grade image intensifier

Ščajev

Mekys

2023

J. Inst.

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A commercial grade low-cost image intensifier was modified with a fast transistor gating circuit for time-resolved photoluminescence spectra and decay measurements. Gating exposure of 20 ns and spectral sensitivity in the 300–1000 nm range were achieved. Operation frequency in 5 Hz to 0.3 MHz range was verified by a pulsed laser diode. Pulsed repetitive image detection was integrated on a cooled CMOS camera. High dynamic range and wide spectral resolution were achieved. The thermal noise, reduced by three orders of magnitude at -16°C cooling and a high gain of 104, allowed single photon detection. Application of the spectrometer for sensitive photoluminescence decay measurements at pulsed laser excitation was performed on MAPbBr3 perovskite and CsI(Tl) scintillator crystals. The decay lifetimes of 400–600 ns and 100–6000 ns were determined, respectively. CsI(Tl) scintillator showed much stronger x-ray luminescence intensity due to larger defect density.

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Morphological and optical property study of Li doped ZnO produced by microwave-assisted solvothermal synthesis

Cited by 19 publications

References 39 publications

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH₂ with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH₂ with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Microstructural, Optical, and Work Function Tuning of Fullerene (C₆₀) Modified Zinc Oxide Films for Optoelectronic Devices

Cost-efficient single photon-sensitive nanosecond gated spectrometer based on commercial grade image intensifier

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Morphological and optical property study of Li doped ZnO produced by microwave-assisted solvothermal synthesis

Cited by 19 publications

References 39 publications

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH2 with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH2 with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Microstructural, Optical, and Work Function Tuning of Fullerene (C60) Modified Zinc Oxide Films for Optoelectronic Devices

Cost-efficient single photon-sensitive nanosecond gated spectrometer based on commercial grade image intensifier

Contact Info

Product

Resources

About

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH₂ with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Microwave‐Assisted Rapid Substitution of Ti for Zr to Produce Bimetallic (Zr/Ti)UiO‐66‐NH₂ with Congenetic “Shell–Core” Structure for Enhancing Photocatalytic Removal of Nitric Oxide

Microstructural, Optical, and Work Function Tuning of Fullerene (C₆₀) Modified Zinc Oxide Films for Optoelectronic Devices