Room-temperature H2S Gas Sensor Based on Au-doped ZnFe2O4 Yolk-shell Microspheres

Yin, Yan; Nizamidin, Patima; Turdi, Gulmira; Kari, Nuerguli; Yimit, Abliz

doi:10.2116/analsci.33.945

Cited by 24 publications

(4 citation statements)

References 46 publications

(40 reference statements)

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“…From Fe 2p spectra of ZnFe 2 O 4 (Figure 2e), five peaks can be discovered at 711.61 eV, 713.70 eV, 720.04 eV, 725.94 eV and 733.96 eV, attributing to Fe 2p 3/2 , Fe 2p 3/2 , satellite, Fe 2p 1/2 and satellite. [27][28][29] Similarly, the Fe 2p spectra of BC/ZnFe 2 O 4 shows lower binding energy (711.27 eV, 713.58 eV, 719.58 eV, 725.59 eV and 733.62 eV) than that of ZnFe 2 O 4 , resulting from the electrons transfer from ZnFe 2 O 4 to BC. [30,31] The above results further explain the presence of BC and ZnFe 2 O 4 .…”

Section: Synthesis and Characterization Of Bc/znfe 2 Omentioning

confidence: 97%

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

et al. 2020

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Photocatalysis is a promising solar energy conversion technology due to its potential applications in water treatment, searching for highly efficient photocatalytic materials is highly desirable. Herein, we have prepared a series of biochar(BC)/ZnFe2O4 magnetic nanocomposites by the calcination‐hydrothermal two‐step method. BC/ZnFe2O4 owns improved photoabsorption from 400 to 1300 nm. PL spectra of BC/ZnFe2O4 shows a weaker intensity compared with BC and ZnFe2O4, and BC/ZnFe2O4 generates a stronger photocurrent density (∼0.08 μA cm−2) than that of BC (0) or ZnFe2O4 (0.03 μA cm−2) under the visible light irradiation, implying efficient separation efficiency of photogeneration carriers. The investigation of pH (3, 5, 7, 9, 11) sensitivity of BC/ZnFe2O4 demonstrates that removal efficiency of Cr(VI) achieves the highest rate at pH=3. Under visible light irradiation, BC/ZnFe2O4 as photocatalyst can remove 80 % Cr(VI), higher than that of BC (0) or ZnFe2O4 (44 %). In addition, BC/ZnFe2O4 composites exhibit excellent cycling stability and can be easily separated for recycling due to its stability and unique magnetic properties. This work has presented a promising strategy in adsorption‐photocatalytic treatment of acidic wastewater containing heavy metals.

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Section: Synthesis and Characterization Of Bc/znfe 2 Omentioning

confidence: 97%

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

et al. 2020

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“…As shown in Figure S1, Supporting Information, the prepared thin film was composed of Zn, N, O, and C. Two fitting peaks at ≈1045.4 and ≈1022.3 eV that can be observed in the Zn 2p spectrum (Figure a) are assigned to Zn 2p 1/2 and Zn 2p 3/2 , respectively. The energy gap between the two peaks was equivalent to 23.1 eV, representing the normal oxidation valence state of Zn (II) in [Zn 2 (bdc) 2 (dpNDI)] n thin films . The O 1s spectrum (Figure b) indicated the existence of two different oxygen chemical bonds with two broad peaks at binding energies of ≈532.4 and ≈531.1 eV, which are ascribed to the C═O bond and the C—O bond, respectively .…”

Section: Resultsmentioning

confidence: 99%

Preparation and Optical Study of Zn(II) Metal Organic Framework Thin Film for Xylene Gas Sensing Application

Tuergong

Nizamidin

Yin

et al. 2019

Physica Status Solidi (a)

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An optically transparent metal‐organic framework thin film, [Zn2(bdc)2(dpNDI)]n, is grown on the tin‐diffused glass substrate using layer‐by‐layer liquid phase epitaxial (LPE) growth method at room temperature (20 °C). The influence of growth cycle on morphology, optical properties, and gas sensibility of [Zn2(bdc)2(dpNDI)]n thin film is studied for the first time. The [Zn2(bdc)2(dpNDI)]n thin film displays a honeycomb framework with a large pore size, uniform surface morphology, and higher absorbance after 11 cycles of growth. The optical gas sensing performance of [Zn2(bdc)2(dpNDI)]n thin films is then monitored using the planar optical waveguide (POWG) gas detection system under UV light (395 nm) irradiation. As a result, the [Zn2(bdc)2(dpNDI)]n thin film POWGs exhibit a greater adsorption response to xylene gas, due to the larger refractive index and absorbance changes upon various volatile organic compounds (VOCs). The thin film POWG sensor shows fast, reversible response to xylene gas, in the concentration range of 1–1000 ppm. Furthermore, the xylene gas adsorption kinetics at different temperature is also investigated, in which the xylene gas adsorption behaviors of [Zn2(bdc)2(dpNDI)]n thin film follow a pseudo‐second order (PSO) model; at room temperature, the adsorption capacity on the unit surface is 7.92 μg cm−2.

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“…Spinel ZnFe 2 O 4 (ZFO) is an n-type metal oxide with a normal spinel structure [85] that has gained considerable attention for the detection of gases [86]. Hoang et al [87] synthesized rGO-loaded ZFO NFs (50-100 nm) for H 2 S gas sensing applications.…”

Section: Rgo-loaded Znfe 2 O 4 Nfsmentioning

confidence: 99%

Reduced Graphene Oxide (rGO)-Loaded Metal-Oxide Nanofiber Gas Sensors: An Overview

Majhi

Mirzaei

Kim

et al. 2021

Sensors

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Reduced graphene oxide (rGO) is a reduced form of graphene oxide used extensively in gas sensing applications. On the other hand, in its pristine form, graphene has shortages and is generally utilized in combination with other metal oxides to improve gas sensing capabilities. There are different ways of adding rGO to different metal oxides with various morphologies. This study focuses on rGO-loaded metal oxide nanofiber (NF) synthesized using an electrospinning method. Different amounts of rGO were added to the metal oxide precursors, and after electrospinning, the gas response is enhanced through different sensing mechanisms. This review paper discusses rGO-loaded metal oxide NFs gas sensors.

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Room-temperature H2S Gas Sensor Based on Au-doped ZnFe2O4 Yolk-shell Microspheres

Cited by 24 publications

References 46 publications

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

Preparation and Optical Study of Zn(II) Metal Organic Framework Thin Film for Xylene Gas Sensing Application

Reduced Graphene Oxide (rGO)-Loaded Metal-Oxide Nanofiber Gas Sensors: An Overview

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Room-temperature H2S Gas Sensor Based on Au-doped ZnFe2O4 Yolk-shell Microspheres

Cited by 24 publications

References 46 publications

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe2O4 Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe2O4 Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

Preparation and Optical Study of Zn(II) Metal Organic Framework Thin Film for Xylene Gas Sensing Application

Reduced Graphene Oxide (rGO)-Loaded Metal-Oxide Nanofiber Gas Sensors: An Overview

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Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis