The Correlation between Structural and Optical Properties of Zinc Hydroxide Nanoparticle in Supports Photocatalytic Performance

Rauf, Nurlaela; Ilyas, Sultan; Heryanto, Heryanto; Rahmat, Roni; Fahri, Ahmad Nurul; Rahmi, Mufti Hatur; Tahir, Dahlang

doi:10.1016/j.optmat.2020.110780

Cited by 15 publications

(9 citation statements)

References 77 publications

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“…The best composite for photocatalyst is for low attenuating and propagating constant, means that the structure will easily suppressing recombination of the charge particle due to the higher strain between the atoms [52,54]. In this study shows 5 gr of TiO2 in ZnO/TiO2 composite high potentials compared than that of 2.5 gr TiO2 in ZnO/TiO2 composite for the same calcination temperature [64]. (αh…”

Section: Optical Propertiesmentioning

confidence: 55%

“…Figure 5(b) shows TO was decreased with increasing the temperature. In this study, the highest distance between the two optical phonon vibration mode ((LO-TO)) for ZnO/TiO2 (5 g) at 800 o C may due to some H2O loses in the lattice consequently increase optical bandgap [64,69]. The (LO-TO) was increased with the increasing the TiO2 concentration at the same calcination temperature but not for 700 o C may due to the number of defect (dislocation density) increase consequently the atomic bonding unstable and rearrange to form new atomic cluster in the lattice structure [70,71].…”

Section: Optical Propertiesmentioning

confidence: 68%

“…The function group of C-H band at the wave number 1000-1100 cm -1 [14] and at the wavenumber 1447 cm -1 and 1665 cm -1 , there are chemical bonds of C=C-C and C=C tensile vibration, respectively [21,55]. O-H bond appears at the wavenumber 2504 cm -1 and 3455 cm -1 corresponding to vibration band from suspension of hydroxyl group in adsorbed water [3,64]. A weak infrared peak at 2338 cm -1 probably due to the CO2 vibration bond absorbed during calcination process.…”

Section: Xrd Analysismentioning

confidence: 99%

“…Based on the previous reported which published by Selvi et.al, a diminution of the crystallite size led to an increase in the specific surface area that could enhance the active reaction of the photocatalyst materials [75]. (kr) in the photocatalytic reaction was calculated by the following equation [60,64]:…”

Section: Bandgap and Photocatalytic Degradationmentioning

confidence: 99%

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Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Rusman

Heryanto

et al. 2021

Preprint

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Composite ZnO/TiO2 have been successfully synthesized by green synthesis method with various calcination temperature 500oC, 600oC, 700oC, and 800oC (TiO2 concentrations: 2.5 g and 5 g) for photocatalyst application. In this study, Calopogonium mucunoides leaf extract was used as reducing and stabilizing agent. The synthesized composites were characterized by using Fourier Transform Infra-Red (FTIR), X-Ray Diffraction (XRD), and UV-Visible spectroscopy. The XRD spectra shows the hexagonal phase with wurtzite structure of ZnO and anatase for TiO2. The best degradation performance is 98.26% (only 10 min) for ZnO/TiO2 (5 g) with calcination temperature is 800oC. This is due to the highest distance between two optical phonon mode Δ(LO-TO) and lowest attenuating and propagating constant. The composite ZnO/TiO2 shows high potentials photodegradation of organic dyes with the high stable recyclability up to 5 cycles (> 95%) only for every 15 minutes. High potentials for applicability with the concept environmentally friendly principles and stability for circular chemistry, and efficiency of use the energy and chemicals.

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Section: Optical Propertiesmentioning

confidence: 55%

Section: Optical Propertiesmentioning

confidence: 68%

Section: Xrd Analysismentioning

confidence: 99%

Section: Bandgap and Photocatalytic Degradationmentioning

confidence: 99%

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Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Rusman

Heryanto

et al. 2021

Preprint

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“…The optical properties (refractive index (n and k)) and dielectric function (ε) of the semiconductor Fe 2 O 3 −carbon were determined from the quantitative analysis of the FTIR spectra using Kramers− Kronig (KK) relation. This method was successfully applied for the following materials: the composite cement/BaSO4/ Fe 3 O 4, 52 composite geopolymer fly ash−metal, 53 Co/Fe 2 O 3 − AC, 47 nanoparticle Zn(OH) 2 , 54 composite Fe/CNs/PVA, 55 bioplastics (SPF/starch/chitosan/polypropylene), 56 and composite nanocrystalline carbon−lignin/zinc oxide. 57 The magnetic properties are measured using a vibrating sample magnetometer (VSM) for various amount of carbon in Fe 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

et al. 2021

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Visible-light absorption is a critical factor for photocatalyst activity and absorption of electromagnetic (EM) interference application. The band gap of Fe 2 O 3 is 2 eV, which can be increased by doping with a high-band-gap material such as carbon from activated carbon (AC) with a band gap of 4.5 eV for increased visible-light absorption. The porosity decreases from 88 to 81.6%, and the band gap increases from 2.14 to 2.64 eV by increasing the AC from 10 to 25%, respectively. The photocatalytic activity takes 120 min to produce a harmless product for 10− 20% AC, but 25% AC shows 89.5% degradation in only 90 min and the potential to attenuate the EM wave up to 99% due to the RL being below −20 dB. The secondand third-cycle degradation achieved by the composite Fe 2 O 3 −AC having 25% AC is 88.2 and 86.5% in 90 min, respectively. The pore of the surface state of AC contains a trapped charge, and interaction occurs between the charge (electron/hole) and O 2 or H 2 O to produce OH and superoxide (O 2 − ) radicals. These radicals move inside the molecule of the pollutant (methylene blue (MB)) to break up the bond, with the final products being H 2 O and CO 2 . The X-ray photoelectron (XPS) spectra show that oxygen plays a key role in the interatomic bonding with Fe, C, and MB atoms. The best absorption of EM interference is −21.43 dB, with degradation reaching 89.51% in only 90 min for 25% AC due to its higher band gap and anisotropy constant. Fe 2 O 3 −carbon is a multifunctional material for the green environment because of its electromagnetic interference absorption and photodegradation of wastewater.

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The Construction of Binary Phase Electrolyte Interface for Highly Stable Zinc Anodes

Zhu

Yang

et al. 2023

Advanced Materials

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Metal zinc is a promising anode candidate of aqueous zinc‐ion batteries due to high theoretical capacity, low cost and high safety. However, it often suffers from hydrogen evolution reaction (HER), Zn dendrite growth and formation of by‐products. Herein, a triethyl phosphate (TEP)/H2O binary phase electrolyte (BPE) interface was developed by introducing TEP‐based electrolyte‐wetted hydrophobic polypropylene (PP) separator onto the Zn anode surface. The equilibrium of BPE interface depends on the comparable surface tension of H2O‐based and TEP‐based electrolytes on hydrophobic PP separator surfaces. The BPE interface will induce Zn2+ solvation structure conversion from [Zn(H2O)x]2+ to [Zn(TEP)n(H2O)y]2+, where most solvated H2O molecules are removed. In [Zn(TEP)n(H2O)y]2+, the residual H2O molecules can be further constrained by the formation of H‐bonds between TEP and H2O molecules. Consequently, the ionization of solvated H2O molecules is effectively suppressed, and the HER and by‐products will be effectively restricted on Zn anode surfaces in BPE. As a result, Zn anodes exhibit a high Coulombic efficiency of 99.12% and superior cycling performance of 6000 h, which is much higher than the case in single‐phase aqueous electrolytes. To illustrate the feasibility of BPE in full cells, the Zn/AlxV2O5 batteries were assembled based on the BPE and exhibited enhanced cycling performance.This article is protected by copyright. All rights reserved

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The Correlation between Structural and Optical Properties of Zinc Hydroxide Nanoparticle in Supports Photocatalytic Performance

Cited by 15 publications

References 77 publications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

The Construction of Binary Phase Electrolyte Interface for Highly Stable Zinc Anodes

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The Correlation between Structural and Optical Properties of Zinc Hydroxide Nanoparticle in Supports Photocatalytic Performance

Cited by 15 publications

References 77 publications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Green Synthesis ZnO/TiO2 for High Recyclability Rapid Sunlight Photodegradation Textile Dyes Applications

Enhanced Visible-Light Absorption of Fe2O3 Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties

The Construction of Binary Phase Electrolyte Interface for Highly Stable Zinc Anodes

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Enhanced Visible-Light Absorption of Fe₂O₃ Covered by Activated Carbon for Multifunctional Purposes: Tuning the Structural, Electronic, Optical, and Magnetic Properties