High Effective Composite RGO/TiO2 Photocatalysts to Degrade Isopropanol Pollutant in Semiconductor Industry

Lin, Yu-Tang; Huang, Chao‐Wei; Wang, Yen-Han; Wu, Jeffrey C.S.

doi:10.1007/s11244-020-01263-6

Cited by 10 publications

(3 citation statements)

References 47 publications

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“…Loading transition metal was discovered to reduce the recombination rate of the electrons and holes as well as LSPR effect, therefore leading to the increment of the photocatalytic efficiency [10][11][12]. Z-scheme photocatalytic system has been adopted to improve electron-hole transportation as well as better redox potential [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Chemically induced dynamic polarization by magnetic field on nanoionic photocatalysis via 2-propanol oxidation

Wang,

Huang,

2024

Oxide-Based Materials and Devices XV

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Heterogenous photocatalysis has emerged as a sustainable and environmentally benign strategy since it converts solar energy into chemical energy. Though more research is exploring the magnetic field effect on photocatalysis, the mechanism is still ambiguous. Magnetic field-assisted and electric-assisted photocatalytic reactions were investigated in this study. In the first magnetic field-assisted experiment, the magnetic field effect on heterogenous photocatalysis was explored with TiO2 and Pt/TiO2. Isopropanol photocatalytic oxidation reaction was conducted. Two levels of dissolved oxygen concentration, magnitude of magnetic flux density and temperature were studied. The magnetic field positive effect was prominent, especially under higher dissolved oxygen concentration and greater magnitude of a magnetic field. For Pt/TiO2 photocatalyst at 10 o C and dissolved oxygen concentration over 20 ppm, 450 Gauss increased isopropanol photooxidation by 10%, while 900 Gauss enhanced by 21%. For TiO2 photocatalyst at 10 o C dissolved oxygen concentration over 20 ppm, 450 Gauss has no prominent effect, while 900 Gauss enlarged 18% isopropanol photooxidation. The statistical analysis demonstrated that dissolved oxygen with magnetic flux density interaction and DO were the top two influencing elements. The hyperfine mechanism results from the interaction between the electron spins with nuclear spins in atoms. It depends on the elements and the dwelling time of unpaired electrons with its nucleus. The mechanism would contribute to singlet (S) ⇄ triplet (T) intersystem crossing. It was possibly because the net Lorentz force acting on paramagnetic oxygen molecule and singlet-triplet intersystem crossing by magnetic field led to the enhancement of the photooxidation of isopropanol.

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Section: Introductionmentioning

confidence: 99%

Chemically induced dynamic polarization by magnetic field on nanoionic photocatalysis via 2-propanol oxidation

Wang,

Huang,

2024

Oxide-Based Materials and Devices XV

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“…IPA is widely used as a solvent and a synthetic chemical intermediate in industrial production, pharmaceutical electronics, agricultural industries and many other fields [1,2]. Long-term exposure to IPA gas will cause serious harm to human health and safety, in the nervous system, respiratory system and visual system [3,4]. In addition, detection of the IPA concentration in the exhaled gas can be used as one of the biomarkers for early diagnosis of lung cancer [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Au@ZnO Nanofilms by Combining Magnetron Sputtering and Post-Annealing for Selective Detection of Isopropanol

Wang

Guo

et al. 2022

Chemosensors

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We demonstrate the highly sensitive and fast response/recovery gas sensors for detecting isopropanol (IPA), in which the Au-nanoparticles-modified ZnO (Au@ZnO) nanofilms act as the active layers. The data confirm that both the response and the response/recovery speed for the detection of IPA are significantly improved by adding Au nanoparticles on the surface of ZnO nanofilms. The gas sensor with an Optimum Au@ZnO nanofilm exhibits the highest responses of 160 and 7 to the 100 and 1 ppm IPA at 300 °C, which indicates high sensitivity and a very low detecting limit. The sensor also exhibits a very short response/recovery time of 4/15 s on the optimized Au@ZnO nanofilm, which is much shorter than that of the sensor with a pure ZnO nanofilm. The mechanisms of the performance improvement in the sensors are discussed in detail. Both the electronic sensitization and the chemical sensitization of the ZnO nanofilms are improved by the modified Au nanoparticles, which not only regulate the thickness of the depletion layer but also increase the amount of adsorbed oxygen species on the surfaces. This work proposes a strategy to develop a highly sensitive gas sensor for real-time monitoring of IPA.

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“…Moreover, there is abundant industrial wastewater produced [3]. It originates from the increased demand for electricity, fuels, textiles, and other related industries that consume water [4]. However, it leads to a severe environmental issue due to a large amount of discharged wastewater.…”

Section: Introductionmentioning

confidence: 99%

Solar-light-driven LaFe_xNi₁₋_xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

Huang¹,

Hsu²,

Lin³

et al. 2022

Beilstein J. Nanotechnol.

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LaFexNi1−xO3 perovskite oxides were prepared by the sol–gel method under various conditions, including different pH values (pH 0 and pH 7) and different calcination temperatures (500–800 °C) as well as different Fe/Ni ratios (1/9, 3/7, 5/5, 7/3, 9/1). The samples were examined by XRD, DRS, BET, and SEM to reveal their crystallinity, light-absorption ability, specific surface area, and surface features, respectively. The photocatalytic Fenton reaction was conducted using various LaFexNi1−xO3 perovskite oxides to decompose the methylene blue molecules. Accordingly, the synthesis condition of pH 0, calcination temperature at 700 °C, and Fe/Ni ratio = 7/3 could form LaFe0.7Ni0.3O3 perovskite oxides as highly efficient photocatalysts. Moreover, various conditions during the photocatalytic degradation were verified, such as pH value, catalyst dosage, and the additional amount of H2O2. LaFe0.7Ni0.3O3 perovskite oxides could operate efficiently under pH 3.5, catalyst dosage of 50 mg/150 mL, and H2O2 concentration of 133 ppm to decompose the MB dye in the 1st order kinetic rate constant of 0.0506 s−1.

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High Effective Composite RGO/TiO2 Photocatalysts to Degrade Isopropanol Pollutant in Semiconductor Industry

Cited by 10 publications

References 47 publications

Chemically induced dynamic polarization by magnetic field on nanoionic photocatalysis via 2-propanol oxidation

Chemically induced dynamic polarization by magnetic field on nanoionic photocatalysis via 2-propanol oxidation

Preparation of Au@ZnO Nanofilms by Combining Magnetron Sputtering and Post-Annealing for Selective Detection of Isopropanol

Solar-light-driven LaFe_xNi₁₋_xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

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High Effective Composite RGO/TiO2 Photocatalysts to Degrade Isopropanol Pollutant in Semiconductor Industry

Cited by 10 publications

References 47 publications

Chemically induced dynamic polarization by magnetic field on nanoionic photocatalysis via 2-propanol oxidation

Chemically induced dynamic polarization by magnetic field on nanoionic photocatalysis via 2-propanol oxidation

Preparation of Au@ZnO Nanofilms by Combining Magnetron Sputtering and Post-Annealing for Selective Detection of Isopropanol

Solar-light-driven LaFexNi1−xO3 perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

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Solar-light-driven LaFe_xNi₁₋_xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants