The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
Dong Zhang - One of the best experts on this subject based on the ideXlab platform.
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one pot fabrication of Ferric Ferrocyanide functionalized graphene hydrogel for cesium removal in aqueous solution
RSC Advances, 2017Co-Authors: Yang Yang, Zhaoya Huang, Wei-juan Wang, Peng-hao Zhang, Zhaoyi Tan, Dong ZhangAbstract:The rapid development of the nuclear industry brings benefits for global economic development and solves the energy crisis. However, nuclear industrial activities produce a large amount of radioactive wastewater, which poses serious threats to environmental safety and human health, and 137Cs is considered one of the most abundant radionuclides in radioactive wastewater. In this study, we fabricated a new type of Ferric Ferrocyanide (Prussian blue, PB) functionalized graphene hydrogel (PB/rGOH) for Cs(I) removal. The as-prepared PB/rGOH shows a three dimensional network with PB nanoparticles uniformly distributed on the surface of the rGO sheets. The PB/rGOH could be readily separated from aqueous solution. Moreover, the volume of the composite could shrink to a small stiff bulk material, further reducing the volume of the waste. Kinetics experiments showed that Cs(I) adsorption on PB/rGOH fitted well with pseudo-second-order kinetic model, and the equilibrium data agreed well with the Langmuir model. As calculated from the Langmuir model, the maximum adsorption capacity at pH 5.0 is 58.82 mg g−1. The increase of pH from 3 to 7 could enhance the adsorption capacity, however, further increasing the pH value resulted in serious decomposition of PB nanoparticles. In conclusion, the PB/rGOH prepared in our work showed good performance on removal of Cs(I) in aqueous solution, and has a good application prospect in radioactive waste water treatment.
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One-pot fabrication of Ferric Ferrocyanide functionalized graphene hydrogel for cesium removal in aqueous solution
RSC Advances, 2017Co-Authors: Yang Yang, Zhaoya Huang, Wei-juan Wang, Peng-hao Zhang, Zhaoyi Tan, Dong ZhangAbstract:A novel Ferric Ferrocyanide functionalized graphene hydrogel was fabricated and was used for cesium removal in aqueous solution.
Dianxue Cao - One of the best experts on this subject based on the ideXlab platform.
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enhanced performance of direct peroxide peroxide fuel cell by using ultrafine nickel Ferric Ferrocyanide nanoparticles as the cathode catalyst
International Journal of Hydrogen Energy, 2017Co-Authors: Xue Xiao, Fan Yang, Kui Cheng, Xin Wang, Hongyu Zhang, Guiling Wang, Dianxue CaoAbstract:Abstract Direct peroxide-peroxide fuel cell (DPPFC) employing with H 2 O 2 both as the fuel and oxidant is an attractive fuel cell due to its no intermediates, easy handling, low toxicity and expense. However, the major gap of DPPFC is the cathode performance as a result of the slow reaction kinetics of H 2 O 2 electro-reduction and thus the target issue is to design cathode catalysts with high performance and low cost. Herein, different with using noble metal of state-of-the-art, we have successfully synthesized ultra-fine Ni Fe Ferrocyanide (NiFeHCF) nanoparticles (the mean particles size is 2.5 nm) through a co-precipitation method, which is used as the cathode catalyst towards H 2 O 2 reduction in acidic medium. The current density of H 2 O 2 reduction on the resultant NiFeHCF electrode after the 1800 s test period at −0.1, 0 and 0.1 V are 121, 93 and 76 mA cm 2 , respectively. Meanwhile, a single two-compartment DPPFC cell with NiFeHCF nanoparticles as the cathode and Ni/Ni foam as the anode is assembled and displayed a stable OCP of 1.09 V and a peak power density of 36 mW cm −2 at 20 °C, which is much higher than that of a DPPFC employed with Pd nano-catalyst as cathode.
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Enhanced performance of direct peroxide/peroxide fuel cell by using ultrafine Nickel Ferric Ferrocyanide nanoparticles as the cathode catalyst
International Journal of Hydrogen Energy, 2017Co-Authors: Xue Xiao, Fan Yang, Kui Cheng, Xin Wang, Hongyu Zhang, Guiling Wang, Dianxue CaoAbstract:Abstract Direct peroxide-peroxide fuel cell (DPPFC) employing with H 2 O 2 both as the fuel and oxidant is an attractive fuel cell due to its no intermediates, easy handling, low toxicity and expense. However, the major gap of DPPFC is the cathode performance as a result of the slow reaction kinetics of H 2 O 2 electro-reduction and thus the target issue is to design cathode catalysts with high performance and low cost. Herein, different with using noble metal of state-of-the-art, we have successfully synthesized ultra-fine Ni Fe Ferrocyanide (NiFeHCF) nanoparticles (the mean particles size is 2.5 nm) through a co-precipitation method, which is used as the cathode catalyst towards H 2 O 2 reduction in acidic medium. The current density of H 2 O 2 reduction on the resultant NiFeHCF electrode after the 1800 s test period at −0.1, 0 and 0.1 V are 121, 93 and 76 mA cm 2 , respectively. Meanwhile, a single two-compartment DPPFC cell with NiFeHCF nanoparticles as the cathode and Ni/Ni foam as the anode is assembled and displayed a stable OCP of 1.09 V and a peak power density of 36 mW cm −2 at 20 °C, which is much higher than that of a DPPFC employed with Pd nano-catalyst as cathode.
N. Ferrer - One of the best experts on this subject based on the ideXlab platform.
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Fourier Transform Infrared Spectroscopy Applied to the Characterisation of 17th-20th Century Calcographic and Xylographic Inks
Mikrochimica Acta, 1999Co-Authors: M. T. Romero, N. FerrerAbstract:The aim of this paper is to optimize the analytical method for the characterisation of 17th–20th century calcographic and xylographic inks. It is very important to use not only non destructive techniques, but also analytical instruments that require a minimal amount of material so as to analyze unique or valuable samples, and simultaneously to obtain as much information as possible about their composition. This study compares different ways of sample preparation for further analysis by Fourier transform infrared spectroscopy. It has been possible to analyze the most important absorptions that appear in the spectra and therefore to associate them with the compounds contained in inks. Some of the compounds identified are: hydroxyapatite (calcium phosphate), Prussian blue (Ferric Ferrocyanide), linseed oil, carbonates, nitrates and sulfates.
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Fourier Transform Infrared Spectroscopy Applied to the Characterisation of 17th–20th Century Calcographic and Xylographic Inks
Microchimica Acta, 1999Co-Authors: M. T. Romero, N. FerrerAbstract:The aim of this paper is to optimize the analytical method for the characterisation of 17th–20th century calcographic and xylographic inks. It is very important to use not only non destructive techniques, but also analytical instruments that require a minimal amount of material so as to analyze unique or valuable samples, and simultaneously to obtain as much information as possible about their composition. This study compares different ways of sample preparation for further analysis by Fourier transform infrared spectroscopy. It has been possible to analyze the most important absorptions that appear in the spectra and therefore to associate them with the compounds contained in inks. Some of the compounds identified are: hydroxyapatite (calcium phosphate), Prussian blue (Ferric Ferrocyanide), linseed oil, carbonates, nitrates and sulfates.
Yang Yang - One of the best experts on this subject based on the ideXlab platform.
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one pot fabrication of Ferric Ferrocyanide functionalized graphene hydrogel for cesium removal in aqueous solution
RSC Advances, 2017Co-Authors: Yang Yang, Zhaoya Huang, Wei-juan Wang, Peng-hao Zhang, Zhaoyi Tan, Dong ZhangAbstract:The rapid development of the nuclear industry brings benefits for global economic development and solves the energy crisis. However, nuclear industrial activities produce a large amount of radioactive wastewater, which poses serious threats to environmental safety and human health, and 137Cs is considered one of the most abundant radionuclides in radioactive wastewater. In this study, we fabricated a new type of Ferric Ferrocyanide (Prussian blue, PB) functionalized graphene hydrogel (PB/rGOH) for Cs(I) removal. The as-prepared PB/rGOH shows a three dimensional network with PB nanoparticles uniformly distributed on the surface of the rGO sheets. The PB/rGOH could be readily separated from aqueous solution. Moreover, the volume of the composite could shrink to a small stiff bulk material, further reducing the volume of the waste. Kinetics experiments showed that Cs(I) adsorption on PB/rGOH fitted well with pseudo-second-order kinetic model, and the equilibrium data agreed well with the Langmuir model. As calculated from the Langmuir model, the maximum adsorption capacity at pH 5.0 is 58.82 mg g−1. The increase of pH from 3 to 7 could enhance the adsorption capacity, however, further increasing the pH value resulted in serious decomposition of PB nanoparticles. In conclusion, the PB/rGOH prepared in our work showed good performance on removal of Cs(I) in aqueous solution, and has a good application prospect in radioactive waste water treatment.
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One-pot fabrication of Ferric Ferrocyanide functionalized graphene hydrogel for cesium removal in aqueous solution
RSC Advances, 2017Co-Authors: Yang Yang, Zhaoya Huang, Wei-juan Wang, Peng-hao Zhang, Zhaoyi Tan, Dong ZhangAbstract:A novel Ferric Ferrocyanide functionalized graphene hydrogel was fabricated and was used for cesium removal in aqueous solution.
Xue Xiao - One of the best experts on this subject based on the ideXlab platform.
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enhanced performance of direct peroxide peroxide fuel cell by using ultrafine nickel Ferric Ferrocyanide nanoparticles as the cathode catalyst
International Journal of Hydrogen Energy, 2017Co-Authors: Xue Xiao, Fan Yang, Kui Cheng, Xin Wang, Hongyu Zhang, Guiling Wang, Dianxue CaoAbstract:Abstract Direct peroxide-peroxide fuel cell (DPPFC) employing with H 2 O 2 both as the fuel and oxidant is an attractive fuel cell due to its no intermediates, easy handling, low toxicity and expense. However, the major gap of DPPFC is the cathode performance as a result of the slow reaction kinetics of H 2 O 2 electro-reduction and thus the target issue is to design cathode catalysts with high performance and low cost. Herein, different with using noble metal of state-of-the-art, we have successfully synthesized ultra-fine Ni Fe Ferrocyanide (NiFeHCF) nanoparticles (the mean particles size is 2.5 nm) through a co-precipitation method, which is used as the cathode catalyst towards H 2 O 2 reduction in acidic medium. The current density of H 2 O 2 reduction on the resultant NiFeHCF electrode after the 1800 s test period at −0.1, 0 and 0.1 V are 121, 93 and 76 mA cm 2 , respectively. Meanwhile, a single two-compartment DPPFC cell with NiFeHCF nanoparticles as the cathode and Ni/Ni foam as the anode is assembled and displayed a stable OCP of 1.09 V and a peak power density of 36 mW cm −2 at 20 °C, which is much higher than that of a DPPFC employed with Pd nano-catalyst as cathode.
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Enhanced performance of direct peroxide/peroxide fuel cell by using ultrafine Nickel Ferric Ferrocyanide nanoparticles as the cathode catalyst
International Journal of Hydrogen Energy, 2017Co-Authors: Xue Xiao, Fan Yang, Kui Cheng, Xin Wang, Hongyu Zhang, Guiling Wang, Dianxue CaoAbstract:Abstract Direct peroxide-peroxide fuel cell (DPPFC) employing with H 2 O 2 both as the fuel and oxidant is an attractive fuel cell due to its no intermediates, easy handling, low toxicity and expense. However, the major gap of DPPFC is the cathode performance as a result of the slow reaction kinetics of H 2 O 2 electro-reduction and thus the target issue is to design cathode catalysts with high performance and low cost. Herein, different with using noble metal of state-of-the-art, we have successfully synthesized ultra-fine Ni Fe Ferrocyanide (NiFeHCF) nanoparticles (the mean particles size is 2.5 nm) through a co-precipitation method, which is used as the cathode catalyst towards H 2 O 2 reduction in acidic medium. The current density of H 2 O 2 reduction on the resultant NiFeHCF electrode after the 1800 s test period at −0.1, 0 and 0.1 V are 121, 93 and 76 mA cm 2 , respectively. Meanwhile, a single two-compartment DPPFC cell with NiFeHCF nanoparticles as the cathode and Ni/Ni foam as the anode is assembled and displayed a stable OCP of 1.09 V and a peak power density of 36 mW cm −2 at 20 °C, which is much higher than that of a DPPFC employed with Pd nano-catalyst as cathode.