A multi-layered model for heat conduction analysis of a thermoelectric material strip(TEMs)with a Griffith crack under the electric flux and energy flux load has been developed.The materials parameters of the TEMs var...A multi-layered model for heat conduction analysis of a thermoelectric material strip(TEMs)with a Griffith crack under the electric flux and energy flux load has been developed.The materials parameters of the TEMs vary continuously in an arbitrary manner.To derive the solution,the TEMs is divided into several sub-layers with different material properties.The mixed boundary problem is reduced to a system of singular integral equations,which are solved numerically.The effect of strip width on the electric flux intensity factor and thermal flux intensity factor are studied.展开更多
For the first time, a series of alkynyl carbon materials（ACMs） were prepared via the mechanochemical reaction of CaC2 with six polyhalogenated precursors, namely CCl4,C2Cl6, C2Cl4, C6Cl6, C6Br6, and C14H4Br10（ACM-1...For the first time, a series of alkynyl carbon materials（ACMs） were prepared via the mechanochemical reaction of CaC2 with six polyhalogenated precursors, namely CCl4,C2Cl6, C2Cl4, C6Cl6, C6Br6, and C14H4Br10（ACM-1, ACM-2, ACM-3, ACM-4, ACM-5, and ACM-6,respectively） and used for the adsorptive removal of mercury from aqueous solutions.Based on preliminary investigations, the adsorption of mercury on ACM-5 was studied in depth. Specifically, the effect of p H on mercury adsorptivity, adsorption kinetics,thermodynamics, isotherms, and recyclability was studied. The adsorptivity of mercury on ACMs was found to be closely related to the hydrocarbon precursor, specific surface area of sorbent, and the alkynyl content. ACM-5 showed the best performance and is among the best raw carbonaceous sorbents reported so far, with a Langmuir saturated adsorption capacity of 191.9 mg g-1. The promising mercury adsorption performance mainly arises from the strong Lewis soft acid–soft base interactions between the alkynyl groups and mercury ions. The adsorption isotherms could be satisfactorily correlated with the Langmuir equation. The results show that the ACMs can be used as efficient sorbents for the removal of mercury and may also be useful for the adsorption of other heavy metals.展开更多
文摘A multi-layered model for heat conduction analysis of a thermoelectric material strip(TEMs)with a Griffith crack under the electric flux and energy flux load has been developed.The materials parameters of the TEMs vary continuously in an arbitrary manner.To derive the solution,the TEMs is divided into several sub-layers with different material properties.The mixed boundary problem is reduced to a system of singular integral equations,which are solved numerically.The effect of strip width on the electric flux intensity factor and thermal flux intensity factor are studied.
文摘For the first time, a series of alkynyl carbon materials（ACMs） were prepared via the mechanochemical reaction of CaC2 with six polyhalogenated precursors, namely CCl4,C2Cl6, C2Cl4, C6Cl6, C6Br6, and C14H4Br10（ACM-1, ACM-2, ACM-3, ACM-4, ACM-5, and ACM-6,respectively） and used for the adsorptive removal of mercury from aqueous solutions.Based on preliminary investigations, the adsorption of mercury on ACM-5 was studied in depth. Specifically, the effect of p H on mercury adsorptivity, adsorption kinetics,thermodynamics, isotherms, and recyclability was studied. The adsorptivity of mercury on ACMs was found to be closely related to the hydrocarbon precursor, specific surface area of sorbent, and the alkynyl content. ACM-5 showed the best performance and is among the best raw carbonaceous sorbents reported so far, with a Langmuir saturated adsorption capacity of 191.9 mg g-1. The promising mercury adsorption performance mainly arises from the strong Lewis soft acid–soft base interactions between the alkynyl groups and mercury ions. The adsorption isotherms could be satisfactorily correlated with the Langmuir equation. The results show that the ACMs can be used as efficient sorbents for the removal of mercury and may also be useful for the adsorption of other heavy metals.
