Preparation, Electrochemical Properties and Cytotoxicity Assessment of Nanosized CuO/La2O3/CeO2 Composite for the Decomposition of Gaseous Ammonia

2011 ◽  
Vol 695 ◽  
pp. 53-56
Author(s):  
Chang Mao Hung
Keyword(s):  
Rare Earth ◽  
Composite Materials ◽  
Fixed Bed ◽  
Fetal Lung ◽  
Copper Nitrate ◽  
Fixed Bed Reactor ◽  
Gaseous Ammonia ◽  
Tissue Cell ◽  
Selective Catalytic Oxidation ◽  
Cytotoxicity Assessment

This work considers the CuO/La2O3/CeO2nano-rare earth composite materials were synthesized by coprecipitation method with aqueous solutions of copper nitrate, lanthanum nitrate and cerium nitrate. The performance of the selective catalytic oxidation of ammonia to N2(NH3-SCO) over a CuO/La2O3/CeO2nano-rare earth composite materials in a tubular fixed-bed reactor (TFBR) at temperatures from 423 to 673 K in the presence of oxygen was reported. The catalytic redox behaviors were determined by cyclic voltammetry (CV). Further, cell cytotoxicity and the percentage cell survival were determined by using MTS assay on human fetal lung tissue cell (MRC-5). The experimental results show that the CuO/La2O3/CeO2nanocomposite particles only minor cause cytotoxicity effect in cultured human cells.

Fabrication and Cytotoxicity Studies of the TiO2 Doped with Copper-Based Nanocomposite Particles

2011 ◽  
Vol 695 ◽  
pp. 393-396 ◽  
Author(s):  
Chang Mao Hung
Keyword(s):  
Fetal Lung ◽  
Copper Nitrate ◽  
Tissue Cell ◽  
Nanocomposite Particles ◽  
Toxicological Effect ◽  
Cytotoxicity Studies ◽  
Cultured Human Cells ◽  
Cytotoxicity Assessment ◽  
Human Fetal Lung ◽  
Dispersion Character

Since the growing interest in the manufacture and environmental applications of nanocomposites consisting of CuO and TiO2nanoparticles (NPs), related toxicological effect and interaction with cellular structures for these newly developed materials are still unknown. Recent literature reveals that nanosized CuO and TiO2particles have cytotoxicity risks and ability to cause oxidative stress on health. This work considers the CuO doped TiO2nanocomposite particles were synthesized via a coprecipitation method with aqueous solutions as precursors of copper nitrateand titanium dioxide. Moreover, the nanocomposite particles were characterized using TGA-DTA, UV-Vis and TEM measurements. The calcination temperature was selected at 873 K. The nanocomposite particles were characterized by TEM, as the primary particles, aggregates ranged from 30 to 100 nm and have a good dispersion character. Cell cytotoxicity assessment and the percentage cell survival was determined by using 3-(4,5-dimethylthiazol-2-yl)-5(3-carboxymethoxyphenol)-2-(4-sulfophenyl)-2H-tetrazoli um (MTS) assay on human fetal lung tissue cell (MRC-5). The experimental results show that the CuO doped TiO2nanocomposite particles cause potential cytotoxicity effect in cultured human cells.

Study on the Properties and Cytotoxicity Assessment of Nanostructure Copper-Cerium Model Catalysts Prepared by Coprecipitation Approach

2010 ◽  
Vol 160-162 ◽  
pp. 1291-1296
Author(s):  
Chang Mao Hung
Keyword(s):  
Fetal Lung ◽  
Copper Nitrate ◽  
Ceo2 Nanoparticles ◽  
High Dispersion ◽  
Tissue Cell ◽  
Particle Sizes ◽  
Cultured Human Cells ◽  
Cytotoxicity Assessment ◽  
Human Fetal Lung ◽  
Mts Assay

Since the growing interest in the manufacture and environmental applications of composites consisting of CuO and CeO2 nanoparticles. This work describes the CuO/CeO2 nanoparticle materials were synthesized by coprecipitation approach with aqueous solutions of copper nitrate and cerium nitrate. The nanocomposite particles were characterized by HRTEM, with a particle size around nanoscale particle sizes (~10 nm) with high dispersion phenomena. Further, cell cytotoxicity and the percentage cell survival was determined by using 3-(4,5-dimethylthiazol-2-yl)-5(3-carboxymethoxyphenol)-2-(4-sulfophenyl)-2H-tetrazoli um (MTS) assay on human fetal lung tissue cell (MRC-5). The experimental results show that the CuO/CeO2 nanoparticle materials only minor cause cytotoxicity effect in cultured human cells.

Application of Acid Modified CuO/Al2O3 Nanostructured Catalysts and its Cytotoxicity Assessment for Enhanced CH4-SCR Performance

2011 ◽  
Vol 695 ◽  
pp. 97-100
Author(s):  
Chang Mao Hung
Keyword(s):  
Fixed Bed ◽  
Reaction System ◽  
Nanostructured Catalysts ◽  
Fetal Lung ◽  
Experimental Results ◽  
Fixed Bed Reactor ◽  
Tissue Cell ◽  
Incipient Wetness Impregnation ◽  
Nanostructured Catalyst ◽  
Alumina Support

The effect of treatment with different inorganic acids (HNO3, CH3COOH, and H3PO4) on the activity of CuO/γ-Al2O3 nanostructured catalysts selective catalytic reduction of NO by hydrocarbons (HC-SCR) using CH4as a reducing agent in a tubular fixed-bed reactor (TFBR) at temperatures from 623-1023 K in the presence of oxygen was studied. A CuO/γ-Al2O3 nanostructured catalyst was prepared by incipient wetness impregnation approach of copper nitrateand γ-alumina support. The catalysts were characterized using AEM and XRD. The experimental results show that the support γ-alumina with a 6 N HNO3solution at the calcinations temperature of 873 K obvious promoting effects on the higher activity due to greater acidity of the transforming NO reaction over a CuO/γ-Al2O3nanostructured catalyst, because the acidic pretreatment provides the acidic sites for the catalyst surface and improved the dispersion of copper species and the reactivity over the catalyst reaction system with NO-CH4-O2. Further, cell cytotoxicity and the percentage cell survival was determined by using MTS assay on human fetal lung tissue cell (MRC-5). The experimental results show that the nanoscale CuO/γ-Al2O3catalyst only minor cause cytotoxicity effect in cultured human cells.

Synthesis, Structural and Electrochemical Characterization of Honeycomb Supported Pt-Pd-Rh Composite Catalyst for the Decomposition of Gaseous Ammonia to Nitrogen

2011 ◽  
Vol 214 ◽  
pp. 21-25 ◽  
Author(s):  
Chang Mao Hung
Keyword(s):  
Fixed Bed ◽  
Ceramic Materials ◽  
Composite Catalyst ◽  
Gaseous Ammonia ◽  
Incipient Wetness Impregnation ◽  
Selective Catalytic Oxidation ◽  
High Initial Concentration ◽  
Nh3 Oxidation ◽  
Cellular Ceramic

The behavior of the ammonia (NH3) oxidation was by selective catalytic oxidation (SCO) over a honeycomb supported Pt-Pd-Rh composite catalyst in a tubular fixed-bed flow quartz reactor (TFBR) at 673 K. A honeycomb Pt-Pd-Rh composite catalyst was prepared by incipient wetness impregnation with aqueous solutions of H2PtCl6, Pd(NO3)3 and Rh(NO3)3 that were coated on cordierite cellular ceramic materials. The catalysts surface properties were characterized using OM. The experimental results show that contaminants crystal aggregation phases and washcoat loss from high initial concentration of NH3 may be responsible for the deactivation of the catalysts. In addition, the catalytic redox behavior was determined by cyclic voltammetric (CV), which showed that the catalytic behavior is related to the metal oxide properties of the catalyst.

Preparation, Properties and Cytotoxicity Assessment of Nanosized Pt-Rh Composite Catalyst for the Decomposition of Gaseous Ammonia

2010 ◽  
Vol 160-162 ◽  
pp. 1285-1290
Author(s):  
Chang Mao Hung
Keyword(s):  
Catalytic Oxidation ◽  
Active Sites ◽  
Human Lung ◽  
Fixed Bed ◽  
Composite Catalyst ◽  
Gaseous Ammonia ◽  
Human Lung Cells ◽  
Selective Catalytic Oxidation ◽  
Catalytically Active

The behavior of the ammonia (NH3) oxidation was by selective catalytic oxidation (SCO) over a nanosized Pt-Rh composite catalyst in a tubular fixed-bed flow quartz reactor (TFBR) at temperatures between 423 and 673 K. The catalysts surface properties were characterized using UV-Vis and TEM. The experimental results show high activities for NH3 removal was achieved during catalytic oxidation over the Pt-Rh catalyst at 673 K with an oxygen content of 4%. N2 was the main product in the NH3-SCO process over the nanosized Pt-Rh composite catalyst. These results also verify that the Pt-Rh metals on catalyst surfaces, resulting in the formation of the remarkable catalytically active sites at the metal-support interface in the reduction of NH3 in this process. In addition, the nanosized Pt-Rh composite-induced cytotoxicity testing was mainly applied to the human lung MRC-5 cell line and the percentage of cell survival was determined by MTS analysis in vitro. For nanosized Pt-Rh composite, only minor cytotoxicity was observed when human lung cells were exposed.

The Influence of Calcination Temperature and Cytotoxicity Assessment of Honeycomb Platinum-Containing Cordierite Nanocomposite Catalysts via Incipient Wetness Impregnation Process

2011 ◽  
Vol 71-78 ◽  
pp. 945-949
Author(s):  
Chang Mao Hung
Keyword(s):  
Fetal Lung ◽  
High Dispersion ◽  
Tissue Cell ◽  
Incipient Wetness Impregnation ◽  
Impregnation Process ◽  
Cultured Human Cells ◽  
Incipient Wetness ◽  
Nanocomposite Catalysts ◽  
Cytotoxicity Assessment ◽  
Ceramic Honeycomb

This work describes the platinum-containingcordieritenanocompositematerials were synthesized by incipient wetness impregnation process with aqueous solutions of H2PtCl6, Pd(NO3)3and Rh(NO3)3that were coated on cordierite ceramic honeycomb substances followed by calcinations temperature ranging from 973 to 1273 K. The nanocomposite materials were characterized by STEM, with a particle size around nanoscale particle sizes (~100 nm) with high dispersion phenomena. Further, cell cytotoxicity and the percentage cell survival was determined by using 3-(4,5-dimethylthiazol-2-yl)-5(3-carboxymethoxyphenol)-2-(4-sulfophenyl)-2H-tetrazoli um (MTS) assay on human fetal lung tissue cell (MRC-5). The experimental results show that the platrinum-containingcordieritenanocompositematerials only minor cause cytotoxicity effect in cultured human cells.

Characterization and Cytotoxicity Studies of Mixed Cu-La-Ce Nanocomplexes Prepared by Coprecipitation Approach

2011 ◽  
Vol 110-116 ◽  
pp. 527-533
Author(s):  
Chang Mao Hung
Keyword(s):  
Fetal Lung ◽  
Copper Nitrate ◽  
High Dispersion ◽  
Tissue Cell ◽  
Particle Sizes ◽  
Cell Cytotoxicity ◽  
Cytotoxicity Studies ◽  
Cultured Human Cells ◽  
Human Fetal Lung ◽  
Mts Assay

This work describes the mixed Cu-La-Ce nanocomplexes materials were synthesized by coprecipitation approach with aqueous solutions of copper nitrate, lanthanum nitrate and cerium nitrate. The nanocomplexes materials were characterized by TEM, with a particle size around nanoscale particle sizes (~50 nm) with high dispersion phenomena. Further, cell cytotoxicity and the percentage cell survival was determined by using 3-(4,5-dimethylthiazol-2-yl)-5 (3-carboxymethoxyphenol)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay on human fetal lung tissue cell (MRC-5). The experimental results show that the Cu-La-Ce nanocomplexes materials only minor cause cytotoxicity effect in cultured human cells.

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