Analysis of Fe-doped ZnO thin films for degradation of rhodamine b, methylene blue, and Escherichia coli under visible light

Sutanto, Heri; Alkian, Ilham; Mukholit, Mukholit; Nugraha, Arsyadio Aditya; Hidayanto, Eko; Marhaendrajaya, Indras; Priyono, Priyono

doi:10.1088/2053-1591/ac33fe

Cited by 21 publications

(10 citation statements)

References 45 publications

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“…However, the intensity of the diffraction peak corresponding to the (002) plane decreases with increasing Sn concentration in the ZnO matrix. The absence of impurities or secondary SnO 2 phases, as reported earlier [10], indicates the synthesis of impurity-free Sn-doped ZnO material. A small shift in diffraction peaks towards higher angles in Sndoped samples indicates the incorporation of Sn content in the ZnO lattice [10,31,32].…”

Section: Structural Analysissupporting

confidence: 76%

“…The absence of impurities or secondary SnO 2 phases, as reported earlier [10], indicates the synthesis of impurity-free Sn-doped ZnO material. A small shift in diffraction peaks towards higher angles in Sndoped samples indicates the incorporation of Sn content in the ZnO lattice [10,31,32]. The overall crystallinity of the doped thin films is observed to decrease slightly.…”

Section: Structural Analysissupporting

confidence: 76%

“…Literature suggests that TiO 2 and ZnO have been extensively studied as semiconductors [8,9]. ZnO is an excellent oxidizing agent used as a photocatalyst and exhibits superior efficiency due to strong UV absorption [10,11]. ZnO, a group II-VI semiconductor with a hexagonal wurtzite structure, exhibit a wide direct band gap of 3.3 eV and possesses a large exciton binding energy of 60 meV at 300 k. The high carrier mobility, high transparency, and low resistivity [12] of ZnO, validates its applications in devices such as photoconductive UV detectors [13], solar cells [14], humidity and gas sensors [15,16], TFTs [17], LEDs [18] and photocatalysis [19].…”

Section: Introductionmentioning

confidence: 99%

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Structural, morphological and optical properties of Sn doped zinc oxide thin films synthesis by sol-gel method for photocatalytic applications

Boufelgha

Zellagui²,

Benachour

et al. 2023

Phys. Scr.

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Undoped and tin (Sn)-doped ZnO thin films were synthesized via sol-gel technique and deposited onto the glass substrates using the spin-coating technique. The impact of Sn incorporation at various concentrations on the structural, morphological, and optical properties of ZnO films was studied X-ray diffraction revealed a hexagonal crystal structure for all samples with a preferential crystalline orientation along the (002) plane. The transparency of Sn-doped ZnO thin film in the visible region significantly increased from 75% to 90%. The morphological analysis revealed a decrease in the grain size from 21 nm to 15 nm with Sn content in the matrix of ZnO. The optical properties reveal the contribution of the Burstein-Moss effect and electron-impurity scattering to slightly widen the bandgap from 3.22 eV to 3.24 eV. Urbach energy values demonstrated that the presence of Sn dopant increased the tail-band width of the localized states. These observations suggest that the deposited Sn-ZnO thin films could have possible applications as a photocatalyst for methylene blue (MB) dye degradation.

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Section: Structural Analysissupporting

confidence: 76%

Section: Structural Analysissupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Structural, morphological and optical properties of Sn doped zinc oxide thin films synthesis by sol-gel method for photocatalytic applications

Boufelgha

Zellagui²,

Benachour

et al. 2023

Phys. Scr.

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“…Where λ g is wavelength (nm) and E g is band gap (eV). Thus, the band gap energies of ZnO and Fe-doped ZnO NPs were calculated to be 3.33 and 3.22 eV, respectively indicating enhancement of optical properties due to the inclusion of Fe ions in ZnO, while keeping the inherent characteristics of ZnO as also reported in the literature [20].…”

Section: Materials Characterizationssupporting

confidence: 61%

Electrochemical detection of tryptophan in fish and pharmaceutical supplement at glassy carbon electrode modified with Fe doped ZnO nanoparticle

Teshome,

Addisu Kitte,

Gure

et al. 2023

Electroanalysis

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The co‐precipitation approach was employed in this study to create Fe doped ZnO (Fe‐ZnO) nanoparticles (NPs). To characterize the synthesized NPs, Ultra violet‐Visible (UV‐Vis) spectroscopy, X‐ray diffraction (XRD), fourier transform infrared (FT‐IR), scanning electron microscopy (SEM), and Brunauer‐Emmett‐Teller (BET) were used. Here, a novel electrochemical approach for the detection of tryptophan (Trp) using a glassy carbon electrode modified with Fe‐ZnO NPs (Fe‐ZnO/GCE) is demonstrated. The research findings revealed that Fe‐ZnO/GCE enhanced the electron transfer rate of Trp oxidation. The sensitivity of Trp detection using Fe‐ZnO/GCE in phosphate buffer solution (PBS) at pH 64.0 was significantly improved compared to bare GCE due to the electrocatalytic activity of Fe‐ZnO NPs. Fe‐ZnO/GCE exhibited a linear response with Trp concentrations ranging from 0.1 to 150 μM with the limit of detection (LOD) is 0.089 μM (3σ/m) and limit of quantification (LOQ) about 0.3 μM (10σ/m) using linear sweep voltammetry (LSV). The Fe‐ZnO/GCE sensor was also effectively used to detect Trp in African catfish and multivitamin tablets. Trp analysis in real samples exhibited good recovery values of 89.60 to 99.15 %, demonstrating the accuracy and practicality of the method.

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“…The reduction in energy band gap of doped ZnO was largely contributed by the valence electrons of Fe in which the valence of Fe is larger than the valence of Zn. With larger valence electrons, the Fe acted as an electron donor which eased the transition of electron from the valence band to the conduction band, thus reducing the energy required to excite electrons from valence band to conduction band [34].…”

Section: Energy Band Gap Quantificationmentioning

confidence: 99%

Synthesis and evaluation of Fe-doped zinc oxide photocatalyst for methylene blue and congo red removal

Cheah

Sum

2022

PROGEE

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Zinc oxide is one of the most common photocatalysts utilized for the photocatalytic degradation of synthetic dyes aside from titanium dioxide. However, the application of ZnO in the treatment of wastewater containing synthetic dyes is limited due to the high energy band gap which allows ZnO to be efficient upon irradiation with ultraviolet radiation only. This study aims to evaluate the photocatalytic degradation efficiency of the zinc oxide photocatalyst and its derivatives, specifically 0.25, 0.5, 2.5 and 5 mol% Fe(II)-doped ZnO, 0.25, 0.5, 2.5 and 5 mol% Fe(III)-doped ZnO and 2.5 mol% Fe(II)-Fe(III)-doped ZnO. The performance of the photocatalysts was evaluated based on the effect of solution pH, effect of photocatalyst loading and nature of dye. The synthesis of photocatalysts were done using sol-gel synthesis method, and photodegradation tests were carried out under visible light exposure for 60 minutes. The photocatalysts were characterized with SEM, FTIR, and UV-Vis spectroscopy. The optical characterization results show that 2.5 mol% Fe(II)-Fe(III)-doped ZnO has the lowest band gap energy of 3.401 eV which was estimated using Tauc’s plot. This further validated the degradation performance of the 2.5 mol% Fe(II)-Fe(III)-doped ZnO photocatalyst where it displayed the highest photocatalytic degradation efficiencies at all pH and photocatalyst loading. The highest degradation achieved using methylene blue was 94.21% and 32.97% using congo red as model solute at optimum pH and 300 mg/L photocatalyst loading. In overall, the present study has proven that Fe-doped photocatalysts have the potential for the degradation of various synthetic dyes upon irradiation with visible light.

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Analysis of Fe-doped ZnO thin films for degradation of rhodamine b, methylene blue, and Escherichia coli under visible light

Cited by 21 publications

References 45 publications

Structural, morphological and optical properties of Sn doped zinc oxide thin films synthesis by sol-gel method for photocatalytic applications

Structural, morphological and optical properties of Sn doped zinc oxide thin films synthesis by sol-gel method for photocatalytic applications

Electrochemical detection of tryptophan in fish and pharmaceutical supplement at glassy carbon electrode modified with Fe doped ZnO nanoparticle

Synthesis and evaluation of Fe-doped zinc oxide photocatalyst for methylene blue and congo red removal

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