A tricalcium phosphate(TCP)material was produced from sardine and mackerel waste using a heat treatment method after a Soxhlet extraction to obtain the non-soluble portion of fish waste.The bones were annealed at temp...A tricalcium phosphate(TCP)material was produced from sardine and mackerel waste using a heat treatment method after a Soxhlet extraction to obtain the non-soluble portion of fish waste.The bones were annealed at temperatures between 400℃ and 1200℃.The thermal analysis(TG-DTA)was carried out to investigate the thermal stability of TCP and to confirm the removal of organic matter from the raw fish.The calcined bones were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and field emission scanning electron microscopy(FESEM).The calcium to phosphorous weight ratio was determined by ICP-AES.FT-IR and XRD confirmed the similarities to syntheticβ-TCP(JCPDS-09-169),FE-SEM results revealed the formation of nanostructured TCP.These results suggest that varying the isolation temperature between 600-1200℃ has tremendous impact on the production of TCP from fish bone waste with the required properties.展开更多
Photoelectrochemistry that use semiconductors to absorb sunlight for water splitting provides an effective method for the development of renewable hydrogen energy in the future.In this paper,a transparent and highly-e...Photoelectrochemistry that use semiconductors to absorb sunlight for water splitting provides an effective method for the development of renewable hydrogen energy in the future.In this paper,a transparent and highly-efficient cobalt-iron oxide(Co_(3)FeO_(x))nano-film was fabricated through hydrothermal method by directional adjustment of atomic ratio to promote the kinetics of BiVO_(4)(BVO)photoanode water oxidation.As a result,the Co_(3)FeO_(x)-modified BVO photoanode(Co_(3)FeO_(x)/BVO)exhibits an impressive photocurrent density of 4.0 mA·cm^(2) at 1.23 V versus reversible hydrogen electrode(RHE),approximately 2.17-fold higher than that of bare BVO,as well as a cathodically shifted onset potential of 320 mV.Transparent catalyst nanolayer structure is clarified by ultraviolet-visible spectroscopy.In addition,the Co_(3)FeO_(x)/BVO photoanode has better stability,and there is no obvious activity degradation after 10 hours of reaction.This strategy provides a broad prospect for the use of water oxidation co-catalyst to achieve effective water splitting.展开更多
文摘A tricalcium phosphate(TCP)material was produced from sardine and mackerel waste using a heat treatment method after a Soxhlet extraction to obtain the non-soluble portion of fish waste.The bones were annealed at temperatures between 400℃ and 1200℃.The thermal analysis(TG-DTA)was carried out to investigate the thermal stability of TCP and to confirm the removal of organic matter from the raw fish.The calcined bones were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and field emission scanning electron microscopy(FESEM).The calcium to phosphorous weight ratio was determined by ICP-AES.FT-IR and XRD confirmed the similarities to syntheticβ-TCP(JCPDS-09-169),FE-SEM results revealed the formation of nanostructured TCP.These results suggest that varying the isolation temperature between 600-1200℃ has tremendous impact on the production of TCP from fish bone waste with the required properties.
基金supported by the National Natural Science Foundation of China(Nos.61674152 and 51902309)the Natural Science Foundation of Fujian Province(No.2018J05097)。
文摘Photoelectrochemistry that use semiconductors to absorb sunlight for water splitting provides an effective method for the development of renewable hydrogen energy in the future.In this paper,a transparent and highly-efficient cobalt-iron oxide(Co_(3)FeO_(x))nano-film was fabricated through hydrothermal method by directional adjustment of atomic ratio to promote the kinetics of BiVO_(4)(BVO)photoanode water oxidation.As a result,the Co_(3)FeO_(x)-modified BVO photoanode(Co_(3)FeO_(x)/BVO)exhibits an impressive photocurrent density of 4.0 mA·cm^(2) at 1.23 V versus reversible hydrogen electrode(RHE),approximately 2.17-fold higher than that of bare BVO,as well as a cathodically shifted onset potential of 320 mV.Transparent catalyst nanolayer structure is clarified by ultraviolet-visible spectroscopy.In addition,the Co_(3)FeO_(x)/BVO photoanode has better stability,and there is no obvious activity degradation after 10 hours of reaction.This strategy provides a broad prospect for the use of water oxidation co-catalyst to achieve effective water splitting.
