The Experts below are selected from a list of 1416 Experts worldwide ranked by ideXlab platform
Vitor C Almeida - One of the best experts on this subject based on the ideXlab platform.
-
Magnetic activated carbon derived from biomass waste by concurrent synthesis efficient adsorbent for toxic dyes
ACS Sustainable Chemistry & Engineering, 2016Co-Authors: Andre L Cazetta, Osvaldo Pezoti, Karen C Bedin, Tais L Silva, Andrea Paesano, Tewodros Asefa, Vitor C AlmeidaAbstract:The development of advanced carbon nanomaterials that can efficiently extract pollutants from solutions is of great interest for environmental remediation and human safety. Herein we report the synthesis of Magnetic activated carbons via simultaneous activation and Magnetization processes using carbonized biomass waste from coconut shells (Cb’s) and FeCl3·6H2O as precursor. We also show the ability of the materials to efficiently extract toxic organic dyes from solutions and their ease of separation and recovery from the solutions using a simple Bar Magnet. Textural characterization shows that the materials are microporous. Further analyses of the deconvoluted XPS spectra and X-ray diffraction patterns reveal that the materials possess Magnetite, maghemite and hematite. SEM and TEM images show that an increase in the ratio of FeCl3·6H2O:Cb leads to an increase in the material’s Magnetic properties. The point of zero charge (pHpzc) indicates that the materials have acidic characteristics. Adsorption kineti...
Rao Zhonghao - One of the best experts on this subject based on the ideXlab platform.
-
characteristics and toxic dye adsorption of Magnetic activated carbon prepared from biomass waste by modified one step synthesis
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2018Co-Authors: Guo Feiqiang, Li Xiaolei, Jiang Xiaochen, Zhao Xingmin, Guo Chenglong, Rao ZhonghaoAbstract:Abstract Magnetic activated carbons (MACs) were synthesized by modified one-step method under CO2 atmosphere for the purification of toxic dye, using the mixture of FeCl3·6H2O and peanut shells as precursor. Textural characterization showed that the CO2-MACs synthesized were high surface area carbons and micro-mesoporous structure accounted for a large proportion in the MAC samples as a result of the etching effect of iron oxides and drastic C-CO2 reaction. XRD analysis indicated that Magnetite nanoparticles were formed and the presence of CO2 promoted the formation of thermodynamically stable Fe3O4. SEM images showed that the nanoparticles were well-dispersed on the surface MACs, which occupied some of the void spaces and led to the decrease in adsorption potential and surface area if excessive FeCl3 was impregnated. SuperparaMagnetic behavior derived from the Magnetically active Magnetite enabled easy removal of the spent MAC with malachite green (MG) dye from solutions by a simple Bar Magnet. The best fit of PSO kinetic model and Freundlich isotherm model suggested that the adsorption on the heterogeneous surface was influenced by physisorption and chemisorption might be the rate-limiting step, and the diffusion process was mainly controlled by film diffusion and intraparticle diffusion. Spontaneous (ΔGo
Andre L Cazetta - One of the best experts on this subject based on the ideXlab platform.
-
Magnetic activated carbon derived from biomass waste by concurrent synthesis efficient adsorbent for toxic dyes
ACS Sustainable Chemistry & Engineering, 2016Co-Authors: Andre L Cazetta, Osvaldo Pezoti, Karen C Bedin, Tais L Silva, Andrea Paesano, Tewodros Asefa, Vitor C AlmeidaAbstract:The development of advanced carbon nanomaterials that can efficiently extract pollutants from solutions is of great interest for environmental remediation and human safety. Herein we report the synthesis of Magnetic activated carbons via simultaneous activation and Magnetization processes using carbonized biomass waste from coconut shells (Cb’s) and FeCl3·6H2O as precursor. We also show the ability of the materials to efficiently extract toxic organic dyes from solutions and their ease of separation and recovery from the solutions using a simple Bar Magnet. Textural characterization shows that the materials are microporous. Further analyses of the deconvoluted XPS spectra and X-ray diffraction patterns reveal that the materials possess Magnetite, maghemite and hematite. SEM and TEM images show that an increase in the ratio of FeCl3·6H2O:Cb leads to an increase in the material’s Magnetic properties. The point of zero charge (pHpzc) indicates that the materials have acidic characteristics. Adsorption kineti...
Guo Feiqiang - One of the best experts on this subject based on the ideXlab platform.
-
characteristics and toxic dye adsorption of Magnetic activated carbon prepared from biomass waste by modified one step synthesis
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2018Co-Authors: Guo Feiqiang, Li Xiaolei, Jiang Xiaochen, Zhao Xingmin, Guo Chenglong, Rao ZhonghaoAbstract:Abstract Magnetic activated carbons (MACs) were synthesized by modified one-step method under CO2 atmosphere for the purification of toxic dye, using the mixture of FeCl3·6H2O and peanut shells as precursor. Textural characterization showed that the CO2-MACs synthesized were high surface area carbons and micro-mesoporous structure accounted for a large proportion in the MAC samples as a result of the etching effect of iron oxides and drastic C-CO2 reaction. XRD analysis indicated that Magnetite nanoparticles were formed and the presence of CO2 promoted the formation of thermodynamically stable Fe3O4. SEM images showed that the nanoparticles were well-dispersed on the surface MACs, which occupied some of the void spaces and led to the decrease in adsorption potential and surface area if excessive FeCl3 was impregnated. SuperparaMagnetic behavior derived from the Magnetically active Magnetite enabled easy removal of the spent MAC with malachite green (MG) dye from solutions by a simple Bar Magnet. The best fit of PSO kinetic model and Freundlich isotherm model suggested that the adsorption on the heterogeneous surface was influenced by physisorption and chemisorption might be the rate-limiting step, and the diffusion process was mainly controlled by film diffusion and intraparticle diffusion. Spontaneous (ΔGo
Tewodros Asefa - One of the best experts on this subject based on the ideXlab platform.
-
Magnetic activated carbon derived from biomass waste by concurrent synthesis efficient adsorbent for toxic dyes
ACS Sustainable Chemistry & Engineering, 2016Co-Authors: Andre L Cazetta, Osvaldo Pezoti, Karen C Bedin, Tais L Silva, Andrea Paesano, Tewodros Asefa, Vitor C AlmeidaAbstract:The development of advanced carbon nanomaterials that can efficiently extract pollutants from solutions is of great interest for environmental remediation and human safety. Herein we report the synthesis of Magnetic activated carbons via simultaneous activation and Magnetization processes using carbonized biomass waste from coconut shells (Cb’s) and FeCl3·6H2O as precursor. We also show the ability of the materials to efficiently extract toxic organic dyes from solutions and their ease of separation and recovery from the solutions using a simple Bar Magnet. Textural characterization shows that the materials are microporous. Further analyses of the deconvoluted XPS spectra and X-ray diffraction patterns reveal that the materials possess Magnetite, maghemite and hematite. SEM and TEM images show that an increase in the ratio of FeCl3·6H2O:Cb leads to an increase in the material’s Magnetic properties. The point of zero charge (pHpzc) indicates that the materials have acidic characteristics. Adsorption kineti...
