The Experts below are selected from a list of 74352 Experts worldwide ranked by ideXlab platform
Bo Lai - One of the best experts on this subject based on the ideXlab platform.
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Strengthening the Catalytic Activity for Ozonation of Cu/Al2O3 by an Electroless Plating–Calcination Process
2018Co-Authors: Yi Ren, Jiali Peng, Bo LaiAbstract:A new method of electroless plating–calcination was developed to prepare Cu/Al2O3 with high catalytic activity and long Operational Life for catalytic ozonation. First, the effects of key preparation parameters on the catalytic activity of new Cu/Al2O3 were investigated. In addition, new Cu/Al2O3 prepared by electroless plating–calcination and conventional Cu/Al2O3 prepared by impregnation–calcination were characterized. The results show that when Cu/Al2O3 were prepared by electroless plating–calcination, copper oxides were uniformly and densely deposited on the surface of Al2O3, and the copper compounds consist of CuO. Furthermore, the catalytic activity and Operational Life of the two kinds of Cu/Al2O3 were also investigated comparatively. The results confirmed the advantage of the new method for the preparation of Cu/Al2O3 for catalytic ozonation. Finally, the degradation pathway was proposed. It can be concluded that electroless plating–calcination is a promising technology to prepare the robust Cu/Al2O3 with high catalytic activity for the decomposition of ozone
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comparative study on the characteristics Operational Life and reactivity of fe cu bimetallic particles prepared by electroless and displacement plating process
RSC Advances, 2016Co-Authors: Yi Ren, Bo LaiAbstract:In this study, an electroless (electrode-less) copper plating technology was developed to prepare the high-reactive and robust iron–copper (Fe/Cu) bimetallic particles. First, effect of pretreatment and key preparation parameters (e.g., complexant, H3BO3, NiSO4·7H2O, pH and plating time) on the reactivity of Fe/Cu bimetallic particles were investigated, respectively. Their reactivity was evaluated according to the obtained Kobs for PNP removal. Also, the characteristics of Fe/Cu bimetallic particles prepared by electroless plating and displacement plating were comparatively observed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The analysis results show that when Fe/Cu bimetallic particles were prepared by electroless plating, copper was uniformly deposited on the surface of Fe0 substrate, and only a few bulky particles were observed. However, plenty of loose copper blocks were heterogeneously distributed on the surface of Fe0 substrates when the Fe/Cu bimetallic particles were prepared by the conventional displacement plating. Furthermore, the Operational Life and reactivity of Fe/Cu bimetallic particles prepared by electroless and displacement plating process were comparatively investigated by the recycling experiment. The results suggest that the new Fe/Cu bimetallic particles have a longer Operational Life than that of the conventional Fe/Cu bimetallic particles. Meanwhile, it can be seen from the control experiments that the new Fe/Cu bimetallic particles have a stronger reactivity for the PNP removal both in Fe/Cu/air and Fe/Cu/N2 processes. As results, the new electroless plating for the preparation of Fe/Cu bimetallic particles is superior to the conventional displacement plating. In other words, the electroless copper plating is a promising technology to prepare the high-reactive and robust Fe/Cu bimetallic particles.
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influence of preparation conditions on characteristics reactivity and Operational Life of microsized fe cu bimetallic particles
Industrial & Engineering Chemistry Research, 2014Co-Authors: Bo Lai, Yunhong Zhang, Yue Yuan, Zhaoyu Chen, Ping YangAbstract:The effect of the preparation conditions on the physicochemical characteristics, operating Life, and reactivity of Fe/Cu bimetallic particles was studied significantly by using a model pollutant (p-nitrophenol), scanning electron microscopy–energy dispersive spectrometry, and X-ray diffraction spectrometry. The results suggest that the higher reactivity and longer operating Life of Fe/Cu bimetallic particles were obtained under the optimal preparation conditions. Furthermore, under the optimal preparation conditions, Cu was not easily dropped from the Fe0 particle, and the weight ratio of Cu on the surface of the Fe/Cu bimetallic particles increased significantly. Moreover, their optimal theoretical Cu mass loading could be decreased from 0.89 to 0.41 g Cu/g Fe, which favors the reduction of production costs. In addition, two batch experiments with Fe/Cu bimetallic particles prepared under optimal and nonoptimal conditions were set up to comparatively investigate the improvement of operating Life and reac...
Ping Yang - One of the best experts on this subject based on the ideXlab platform.
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influence of preparation conditions on characteristics reactivity and Operational Life of microsized fe cu bimetallic particles
Industrial & Engineering Chemistry Research, 2014Co-Authors: Bo Lai, Yunhong Zhang, Yue Yuan, Zhaoyu Chen, Ping YangAbstract:The effect of the preparation conditions on the physicochemical characteristics, operating Life, and reactivity of Fe/Cu bimetallic particles was studied significantly by using a model pollutant (p-nitrophenol), scanning electron microscopy–energy dispersive spectrometry, and X-ray diffraction spectrometry. The results suggest that the higher reactivity and longer operating Life of Fe/Cu bimetallic particles were obtained under the optimal preparation conditions. Furthermore, under the optimal preparation conditions, Cu was not easily dropped from the Fe0 particle, and the weight ratio of Cu on the surface of the Fe/Cu bimetallic particles increased significantly. Moreover, their optimal theoretical Cu mass loading could be decreased from 0.89 to 0.41 g Cu/g Fe, which favors the reduction of production costs. In addition, two batch experiments with Fe/Cu bimetallic particles prepared under optimal and nonoptimal conditions were set up to comparatively investigate the improvement of operating Life and reac...
Anastasios P Vassilopoulos - One of the best experts on this subject based on the ideXlab platform.
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complex stress state effect on fatigue Life of grp laminates part ii theoretical formulation
International Journal of Fatigue, 2002Co-Authors: T P Philippidis, Anastasios P VassilopoulosAbstract:The synergistic effect of in-plane stress tensor components on fatigue strength is not traditionally considered in the design of thin-wall box-beam structures, e.g. composite rotor blades in general. Fatigue Life calculations account only for the normal stresses due to bending and centrifugal forces, neglecting the contribution of shear and transverse normal stresses. The theoretical formulation of a Life prediction methodology accounting for all in-plane stress tensor components, through the use of a multiaxial fatigue strength criterion, is presented here. Comparison of theoretical predictions with experimental results from constant amplitude, uniaxial, off-axis tests demonstrates the drastic effect of shear and transverse normal stresses, besides that of axial normal stress, in reducing Operational Life of a GRP structural laminate.
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complex stress state effect on fatigue Life of grp laminates part i experimental
International Journal of Fatigue, 2002Co-Authors: T P Philippidis, Anastasios P VassilopoulosAbstract:In structural applications of thin-wall, box beam constructions with composites, the effect of complex stress states is not properly taken into account in determining Operational Life and fatigue response in general, due either to misconceptions or lack of experimental data and theoretical models. Results from a recent research project, presented here in two parts, aim to contribute to the better understanding of fatigue behaviour of GRP laminates under complex in-plane stress states. An initial estimate on the effect of neglecting shear and transverse normal stresses in fatigue Life calculations is provided, based on experimental data and theoretical considerations. It is concluded that in structural GRP laminates, shear and transverse normal stresses have an important contribution in reducing Operational Life, irrespective of their magnitude, usually small compared to axial normal stresses.
T P Philippidis - One of the best experts on this subject based on the ideXlab platform.
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complex stress state effect on fatigue Life of grp laminates part ii theoretical formulation
International Journal of Fatigue, 2002Co-Authors: T P Philippidis, Anastasios P VassilopoulosAbstract:The synergistic effect of in-plane stress tensor components on fatigue strength is not traditionally considered in the design of thin-wall box-beam structures, e.g. composite rotor blades in general. Fatigue Life calculations account only for the normal stresses due to bending and centrifugal forces, neglecting the contribution of shear and transverse normal stresses. The theoretical formulation of a Life prediction methodology accounting for all in-plane stress tensor components, through the use of a multiaxial fatigue strength criterion, is presented here. Comparison of theoretical predictions with experimental results from constant amplitude, uniaxial, off-axis tests demonstrates the drastic effect of shear and transverse normal stresses, besides that of axial normal stress, in reducing Operational Life of a GRP structural laminate.
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complex stress state effect on fatigue Life of grp laminates part i experimental
International Journal of Fatigue, 2002Co-Authors: T P Philippidis, Anastasios P VassilopoulosAbstract:In structural applications of thin-wall, box beam constructions with composites, the effect of complex stress states is not properly taken into account in determining Operational Life and fatigue response in general, due either to misconceptions or lack of experimental data and theoretical models. Results from a recent research project, presented here in two parts, aim to contribute to the better understanding of fatigue behaviour of GRP laminates under complex in-plane stress states. An initial estimate on the effect of neglecting shear and transverse normal stresses in fatigue Life calculations is provided, based on experimental data and theoretical considerations. It is concluded that in structural GRP laminates, shear and transverse normal stresses have an important contribution in reducing Operational Life, irrespective of their magnitude, usually small compared to axial normal stresses.
Yi Ren - One of the best experts on this subject based on the ideXlab platform.
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Strengthening the Catalytic Activity for Ozonation of Cu/Al2O3 by an Electroless Plating–Calcination Process
2018Co-Authors: Yi Ren, Jiali Peng, Bo LaiAbstract:A new method of electroless plating–calcination was developed to prepare Cu/Al2O3 with high catalytic activity and long Operational Life for catalytic ozonation. First, the effects of key preparation parameters on the catalytic activity of new Cu/Al2O3 were investigated. In addition, new Cu/Al2O3 prepared by electroless plating–calcination and conventional Cu/Al2O3 prepared by impregnation–calcination were characterized. The results show that when Cu/Al2O3 were prepared by electroless plating–calcination, copper oxides were uniformly and densely deposited on the surface of Al2O3, and the copper compounds consist of CuO. Furthermore, the catalytic activity and Operational Life of the two kinds of Cu/Al2O3 were also investigated comparatively. The results confirmed the advantage of the new method for the preparation of Cu/Al2O3 for catalytic ozonation. Finally, the degradation pathway was proposed. It can be concluded that electroless plating–calcination is a promising technology to prepare the robust Cu/Al2O3 with high catalytic activity for the decomposition of ozone
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comparative study on the characteristics Operational Life and reactivity of fe cu bimetallic particles prepared by electroless and displacement plating process
RSC Advances, 2016Co-Authors: Yi Ren, Bo LaiAbstract:In this study, an electroless (electrode-less) copper plating technology was developed to prepare the high-reactive and robust iron–copper (Fe/Cu) bimetallic particles. First, effect of pretreatment and key preparation parameters (e.g., complexant, H3BO3, NiSO4·7H2O, pH and plating time) on the reactivity of Fe/Cu bimetallic particles were investigated, respectively. Their reactivity was evaluated according to the obtained Kobs for PNP removal. Also, the characteristics of Fe/Cu bimetallic particles prepared by electroless plating and displacement plating were comparatively observed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The analysis results show that when Fe/Cu bimetallic particles were prepared by electroless plating, copper was uniformly deposited on the surface of Fe0 substrate, and only a few bulky particles were observed. However, plenty of loose copper blocks were heterogeneously distributed on the surface of Fe0 substrates when the Fe/Cu bimetallic particles were prepared by the conventional displacement plating. Furthermore, the Operational Life and reactivity of Fe/Cu bimetallic particles prepared by electroless and displacement plating process were comparatively investigated by the recycling experiment. The results suggest that the new Fe/Cu bimetallic particles have a longer Operational Life than that of the conventional Fe/Cu bimetallic particles. Meanwhile, it can be seen from the control experiments that the new Fe/Cu bimetallic particles have a stronger reactivity for the PNP removal both in Fe/Cu/air and Fe/Cu/N2 processes. As results, the new electroless plating for the preparation of Fe/Cu bimetallic particles is superior to the conventional displacement plating. In other words, the electroless copper plating is a promising technology to prepare the high-reactive and robust Fe/Cu bimetallic particles.
