scholarly journals Application of Wastewater Reuse with Photocatalyst Prepared by Sol-Gel Method and Its Kinetics on the Decomposition of Low Molecular Weight Pollutants

2020 ◽  
Vol 17 (12) ◽  
pp. 4203
Author(s):  
Jinwook Chung ◽  
Seungjoon Chung ◽  
Gyuyoung Lee ◽  
Yong-Woo Lee
Keyword(s):  
Molecular Weight ◽  
Sol Gel ◽  
Wastewater Reuse ◽  
Synthetic Wastewater ◽  
Low Molecular Weight ◽  
Gel Method ◽  
Sol Gel Method ◽  
Preparation Conditions ◽  
Removal Efficiencies ◽  
Reaction Constants

The development of immobilized photocatalyst as a strategy for problematic electronics wastewater reuse is described in this study. The strategy was to perform separate rinsing, mostly consisting of low molecular weight compounds, and to decompose them with a simple process, based on the advanced oxidation process (AOP). Extensive studies were performed on the preparation conditions of immobilized photocatalysts by sol-gel method under various amount of precursor and support, water to precursor ratio, pH, aging time, and calcination conditions. The optimized preparation conditions were chosen by measuring removal efficiencies of isopropyl alcohol as a representative target compound with supportive SEM and XRD analyses. Removal efficiencies with photocatalyst and UV irradiation in synthetic wastewater simulating electronics wastewater were evaluated over time. Removal efficiencies of alcohol, acetone, ethanol, and acetaldehyde reached 97.2%, 71.2%, 99.0%, and 99.0%, respectively, in 2 h. Reaction constants of each compound were determined by fitting experimental data to the first order kinetic equation and the trial and error method with consecutive reaction pathway. As analysis results of reaction constants, UV with prepared photocatalyst was found to be effective and the decomposition of acetone was found to be the rate-determining step. The immobilized photocatalyst developed in this study would be useful for application of wastewater reuse with high removal efficiencies, mild preparation conditions, and mechanical stability.

scholarly journals Effect of preparation conditions in sol-gel method on yellow phosphor with wide spectrum

AIP Advances ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 015208 ◽  
Author(s):  
Yenchen Lin ◽  
Shuhei Inoue ◽  
Yukihiko Matsumura ◽  
Jyh-Chen Chen
Keyword(s):  
Wide Spectrum ◽  
Sol Gel ◽  
Yellow Phosphor ◽  
Gel Method ◽  
Sol Gel Method ◽  
Preparation Conditions

scholarly journals SYNTHESIS THIN LAYER ZnO-TiO2 PHOTOCATALYSTS SOL GEL METHOD BY USING THE PEG (Polyethylene Glycol) AS SOLVENT

2014 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
Tanti Haryati ◽  
Novita Andarini ◽  
Mellisa Ika Febrianti
Keyword(s):  
Crystal Structure ◽  
Molecular Weight ◽  
Thin Layer ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Morphological Examination ◽  
Catalyst Synthesis ◽  
Gel Method ◽  
Sol Gel Method ◽  
Tio2 Sol

The incorporation of TiO and ZnO material as a composite, to increase the activity of the catalyst. Synthesis of ZnO-TiO2 thin layer made using a sol-gel method with a variation of PEG as a solvent. The purpose of this research was to investigate the structure and morphology of ZnO-TiO2 thin layer on the variation of PEG as a solvent by sol-gel method . Preparation of ZnO sol of the precursor , while the TiO2 sol synthesized by dissolving the anatase TiO2 structure into polyethilen glycol . Sol of ZnO and TiO2 sol do sol mixing to form ZnO–TiO2 after it coated on a glass substrate and then calcined . Products were then characterized by X-ray diffraction to determine the crystal structure and SEM to determine its morphology . The test results show the crystal structure by XRD based difaktogram intensity , the greater the molecular weight of the PEG peak intensity of ZnO-TiO2 showed the lower. While based on morphological examination , it can be seen that the larger molecular weight PEG , ZnO - TiO2 granular greater.

scholarly journals Nanostructured Mesoporous Titanium Dioxide Thin Film Prepared by Sol-Gel Method for Dye-Sensitized Solar Cell

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Yu-Chang Liu ◽  
Yun-Fang Lu ◽  
Yz-Zhen Zeng ◽  
Chi-Hung Liao ◽  
Jen-Chieh Chung ◽  
...  
Keyword(s):  
Thin Film ◽  
Titanium Dioxide ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Energy Conversion Efficiency ◽  
Diameter Distribution ◽  
Gel Method ◽  
Sol Gel Method ◽  
Preparation Conditions

Titanium dioxide (TiO2) paste was prepared by sol-gel and hydrothermal method with various precursors. Nanostructured mesoporous TiO2thin-film back electrode was fabricated from the nanoparticle colloidal paste, and its performance was compared with that made of commercial P25 TiO2. The best performance was demonstrated by the DSSC having a 16 μm-thick TTIP-TiO2back electrode, which gave a solar energy conversion efficiency of 6.03%. The ability of stong adhesion on ITO conducting glass substrate and the high surface area are considered important characteristics of TiO2thin film. The results show that a thin film with good adhesion can be made from the prepared colloidal paste as a result of alleviating the possibility of electron transfer loss. One can control the colloidal particle size from sol-gel method. Therefore, by optimizing the preparation conditions, TiO2paste with nanoparticle and narrow diameter distribution was obtained.

Origin of Leakage Current of YMnO3 Thin Films Prepared by the Sol-Gel Method

1999 ◽  
Vol 596 ◽  
Author(s):  
Hiroya Kitahata ◽  
Kiyoharu Tadanaga ◽  
Tsutomu Minami ◽  
Norifumi Fujimura ◽  
Taichiro Ito
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Leakage Current ◽  
Sol Gel ◽  
Hydrogen Atmosphere ◽  
Gel Method ◽  
Sol Gel Method ◽  
Preparation Conditions ◽  
Dense Microstructure ◽  
Zirconium Doping

AbstractThe preparation conditions of YMnO3 thin films by the sol-gel method using yttrium alkoxide were optimized to decrease the leakage current of the films. The leakage current of the films was decreased due to the dense microstructure of the films. Moreover, the heat treatment in hydrogen atmosphere and the zirconium doping resulted in a further decrease of the leakage current. The heat treatment in hydrogen atmosphere and the zirconium doping were effective in the decrease of carriers originating in the valence fluctuation of the Mn ions in YMnO3

Synthesis and Photocatalytic Property of N-doped BiVO$lt;inf$gt;4$lt;/inf$gt; via Sol-Gel Method Using Corn Stem as Template

2014 ◽  
Vol 29 (8) ◽  
pp. 807
Author(s):  
WANG Min ◽  
NIU Chao ◽  
DONG Zhan-Jun ◽  
CHE Yin-Sheng ◽  
DONG Duo ◽  
...  
Keyword(s):  
Sol Gel ◽  
Photocatalytic Property ◽  
Gel Method ◽  
Sol Gel Method

Fe2O3 - TiO2 THIN FILMS PREPARED BY SOL-GEL METHOD

2011 ◽  
Vol 10 (2) ◽  
pp. 187-192 ◽  
Author(s):  
Ramona-Crina Suciu ◽  
Marcela Corina Rosu ◽  
Teofil Danut Silipas ◽  
Emil Indrea ◽  
Violeta Popescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Gel Method ◽  
Sol Gel Method
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