Titanium Dioxide/Zeolite Catalytic Adsorbent for the Removal of NO and Acetone Vapors

Jan, Yan Huei; Lin, Liang-Yi; Karthik, M.; Bai, Hsun-Ling

doi:10.3155/1047-3289.59.10.1186

Cited by 23 publications

(9 citation statements)

References 29 publications

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“…In addition, there are many studies of combinations of TiO 2 photocatalysts and zeolites for photochemical and photocatalytic science and applications [ 42 , 43 ]. For, example, studies have been reported on the adsorption and photocatalytic degradation of various organic pollutants [ 44 , 45 , 46 , 47 , 48 , 49 , 50 ] and nitrogen oxides (NO x ) [ 51 , 52 ]. Among the synthesized zeolites, X- and Y-zeolites, which have faujasite (FAU) structure, are well known to have large pores (0.74 nm in diameter) due to their super cage structures and the ability to adsorb relatively large organic molecules [ 53 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Titania/X-Zeolite/Porous Glass Composite Photocatalyst Using Hydrothermal and Drop Coating Processes

2015

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Combinations of TiO2 photocatalysts and various adsorbents have been widely studied for the adsorption and photocatalytic decomposition of gaseous pollutants such as volatile organic compounds (VOCs). Herein, a TiO2-zeolite-porous glass composite was prepared using melt-quenching and partial sintering, hydrothermal treatment, and drop coating for preparation of the porous glass support and X-zeolite and their combination with TiO2, respectively. The obtained composite comprised anatase phase TiO2, X-zeolite, and the porous glass support, which were combined at the micro to nanometer scales. The composite had a relatively high specific surface area of approximately 25 m2/g and exhibited a good adsorption capacity for 2-propanol. These data indicated that utilization of this particular phase-separated glass as the support was appropriate for the formation of the bulk photocatalyst-adsorbent composite. Importantly, the photocatalytic decomposition of adsorbed 2-propanol proceeded under UV light irradiation. The 2-propanol was oxidized to acetone and then trapped by the X-zeolite rather than being released to the atmosphere. Consequently, it was demonstrated that the micrometer-scaled combination of TiO2 and zeolite in the bulk form is very useful for achieving both the removal of gaseous organic pollutants and decreasing the emission of harmful intermediates.

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Section: Introductionmentioning

confidence: 99%

Preparation of a Titania/X-Zeolite/Porous Glass Composite Photocatalyst Using Hydrothermal and Drop Coating Processes

2015

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“…Similarly, the development of gas sensors based on hierarchical metal oxides, binary metal oxides can pave a novel way for highly sensitive and selective analysis of gases[ 27 – 30 ]. In this direction, metal oxides such as ZnO [ 31 , 32 ], copper oxide [ 33 ], indium oxide [ 34 ], titanium dioxide [ 35 ], WO 3 [ 36 ], MoO 3 [ 37 ] and α-Fe 2 O 3 @SnO 2 core–shell heterostructure nanotubes [ 38 ] have been investigated for the detection of acetone. Despite of all this progress, it is highly desirable to design portable, economical and robust assays.…”

Section: Introductionmentioning

confidence: 99%

Design of a novel filter paper based construct for rapid analysis of acetone

et al. 2018

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The present work was focused to design a cheap, rapid, portable and easy to use filter paper based assay for the qualitative and quantitate analysis of acetone. Sodium alginate gel was loaded with the acetone specific optical signal probe, and subsequently coated onto filter paper surface to design portable colorimetric assays for acetone monitoring. The color of the paper sensor strip was observed to change from dark yellow to light yellowish in the presence of varying concentrations of acetone. Three different color analyzing models including RGB, HSV, and LAB were employed to probe the output optical signal, and their performance was compared in terms of better interpretation of the generated signal. The LAB model was found to provide better analytical figures of merit with a linear response for the acetone concentration ranging from 2.5 to 1500 ppm, and a limit of detection of 0.5 ppm. Furthermore, the specificity of the designed filter paper based sensor was demonstrated against different common interfering compounds. The results demonstrated the potential of our proposed filter paper based sensor as a novel tool for the analysis of acetone.

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“…TiO 2 -combined porous adsorbent could also enhance the removal efficiency of target pollution due to the dual mechanisms of photocatalysis and adsorption. In addition, the adsorbent would concentrate the pollutant on the TiO 2 surface and improve the interaction between the pollutant and TiO 2 in the photocatalysis process, thus better the removal efficiency (Jan et al 2009;Chang and Lin 2009;Ye et al 2009;Jo and Yang 2009). The removal mechanism of pollutant by TiO 2 combined with adsorbent, such as activated carbon, would be contributed to the adsorption and photocatalysis method.…”

Section: Introductionmentioning

confidence: 99%

Applying Ag–TiO2/functional filter for abating odor exhausted from semiconductor and opti-electronic industries

Lin

2012

Clean Techn Environ Policy

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Some of the odor-related problems from the semiconductor and opti-electronic industries are caused by the volatile organic compounds, acetic acid, and dimethyl sulfide. These odorous exhausts would persecute residents' health and lower the environmental quality. In this study, Ag-TiO 2 /functional filter was applied to removal these odorous compounds. The results indicated that K 2 CO 3 / activated carbon filter (ACF) would be the better composition of functional filter, which attributed to larger surface area of ACF and mid-alkalinity of K 2 CO 3 . Comparing the TiO 2 type, P25 TiO 2 (Degussa, Germany)/functional filter showed the more superior photodegradation efficiency than ST01 TiO 2 (Ishihra Sangyo, Japan)/functional filter. In addition, Ag-modifying TiO 2 /functional filter enhanced the photocatalysis via postponing the recombination between electrons and holes. The 0.001 M AgNO 3 solution was the optimal immersing concentration to make Ag dispersed uniformly on TiO 2 surface. Operating from 25 to 50°C, the rising temperature was contributive to photodegradation efficiency due to the increase of system reaction energy. Processing photocatalysis below 75 % of relative humidity, existing humidity could be combined with holes to from hydronium (H 3 O ? ) and hydroxyl radical (OH -) to improve photodegradation. Assisted with ozone concentration ratio of 0.7 times, the removal efficiency for high pollutant concentration via Ag-TiO 2 /functional filter could be improved up to 90 % until operating 180 min; this combined method could save the oxidant consumption more than single advanced oxidation method for processing pollutant.

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Titanium Dioxide/Zeolite Catalytic Adsorbent for the Removal of NO and Acetone Vapors

Cited by 23 publications

References 29 publications

Preparation of a Titania/X-Zeolite/Porous Glass Composite Photocatalyst Using Hydrothermal and Drop Coating Processes

Preparation of a Titania/X-Zeolite/Porous Glass Composite Photocatalyst Using Hydrothermal and Drop Coating Processes

Design of a novel filter paper based construct for rapid analysis of acetone

Applying Ag–TiO2/functional filter for abating odor exhausted from semiconductor and opti-electronic industries

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