A synthesis method for nanosized forsterite(Mg_(2)SiO_(4))doped with varying concentrations of Ni and Co has been developed to support studies of carbonation-based extraction and separation of Ni and Co from mafic and...A synthesis method for nanosized forsterite(Mg_(2)SiO_(4))doped with varying concentrations of Ni and Co has been developed to support studies of carbonation-based extraction and separation of Ni and Co from mafic and ultramafic rocks.The protocol expands upon an existing sol-gel/surfactant method and is demonstrated for doping levels of 5%and 25%of Ni or Co.Variables such as metal reagents,surfactant ratios,and calcination procedures were optimized to achieve high specific surface areas and small particle sizes while minimizing secondary phase formation.Particle sizes ranged from 29 to 83 nm,and specific surface areas were between 11 and 32 m^(2) g^(−1).Metal oxide impurities were minimal,appearing only in undoped and 25%Ni-doped samples at 0.6 wt%or less.Ni and Co were only detected in the+Ⅱ oxidation state and partitioned predominantly in the M1 cation site of the forsterite crystal structure.Doped nanosized forsterites prepared with this method will enable in situ experiments that can track,at the molecular scale,the fate of Ni and Co during carbonation reactions and thus provide a knowledge base for improving metal extraction and separation technologies.展开更多
基金supported by the U.S.Department of Energy,Office of Science,Office of Basic Energy Sciences,Chemical and Materials Sciences to Advance Clean Energy Technologies and Low-Carbon Manufacturing(FWP 80281)Pacific Northwest National Laboratory(PNNL)is operated for the DOE by Battelle Memorial Institute under contract DE-AC05-76RL01830+1 种基金A portion of this research was performed on a project award(10.46936/lser.proj.2023.60770/60008927)from the Environmental Molecular Sciences Laboratory,a DOE Office of Science User Facility sponsored by the Biological and Environmental Research program under Contract No.DE-AC05-76RL01830supported by the Science Undergraduate Laboratory Internships program(SULI)of the U.S.Department of Energy,Office of Science,Office of Workforce Development for Teachers and Scientists(WDTS).
文摘A synthesis method for nanosized forsterite(Mg_(2)SiO_(4))doped with varying concentrations of Ni and Co has been developed to support studies of carbonation-based extraction and separation of Ni and Co from mafic and ultramafic rocks.The protocol expands upon an existing sol-gel/surfactant method and is demonstrated for doping levels of 5%and 25%of Ni or Co.Variables such as metal reagents,surfactant ratios,and calcination procedures were optimized to achieve high specific surface areas and small particle sizes while minimizing secondary phase formation.Particle sizes ranged from 29 to 83 nm,and specific surface areas were between 11 and 32 m^(2) g^(−1).Metal oxide impurities were minimal,appearing only in undoped and 25%Ni-doped samples at 0.6 wt%or less.Ni and Co were only detected in the+Ⅱ oxidation state and partitioned predominantly in the M1 cation site of the forsterite crystal structure.Doped nanosized forsterites prepared with this method will enable in situ experiments that can track,at the molecular scale,the fate of Ni and Co during carbonation reactions and thus provide a knowledge base for improving metal extraction and separation technologies.
