Huang Hangjiu group uses institute of machinery of intelligence of Hefei of academy of science of material of Hefei of the Chinese Academy of Sciences classification oxide of bimetallic of poriferous cerium zirconium accept rice material, the difference of adsorptive to ion of different heavy metal rate realized the tall sensitivity of minute contaminant Pb(II) , select-high sex to detect.
In current heavy metal ion in detecting, electrochemistry method already got applied extensively. But because use dissolve ending of the dog days to install a law to detect heavy metal is ionic (when be like Cu(II) , Hg(II) , Pb(II) , Cd(II) , Zn(II)) , different heavy metal can form the compound between the metal between ion, compete in the adsorptive generation of got-up electrode surface in rich market course, make thereby detect at the same time the interference with the relatively serious generation when a variety of heavy metal are ionic, cannot detect well and truly some kind of specific heavy metal is ionic. Accordingly, search can come true to be reached optionally accurate detect the method of ion of some kind of specific heavy metal makes demand.
The SEM of material of rice of A)Ce-Zr oxide accept pursues; The TEM of material of rice of B)Ce-Zr oxide accept pursues; The suction of material of rice of C) Ce-Zr oxide accept in N2 distributinging graph of desorption curve and aperture; Got-up electrode of D) Ce-Zr oxide detects ending of the dog days of Pb(II) zincous dissolve brings a figure; E) detects the sensitivity of ion of a few kinds of different heavy metal and detect be restricted to compare a figure; The chart of high resolution XPS after Pb(II) of adsorption of material of rice of F)Ce-Zr oxide accept pursues; The research of the adsorptive rate with ionic to different heavy metal material of rice of G) Ce-Zr oxide accept.
Huang Hangjiu group is used classification oxide of bimetallic of poriferous cerium zirconium accept rice ball (Ce-Zr) regards electrode as material, have the aid of its ionic to heavy metal sorption, traverse the zincous dissolve ending of the dog days that ion of metal of sensitive interface counterpoise detects installs the electrochemistry that ball of rice of Ce-Zr oxide accept builds behavior. Study the result makes clear, the Gao Lingmin that analyses a method to be able to realize pair of Pb(II) , select-high sex and tall interference rejection detect. In the meantime, photoelectron of ray of researcher union X- can chart (XPS) technology and much adsorptive experimentation, studied ball of rice of Ce-Zr oxide accept detects optionally deep in detail the likelihood of Pb(II) mechanism. Study the result makes clear, the rate in adsorption of surface of ball of rice of Ce-Zr oxide accept has ion of different heavy metal very big difference, in adsorption the (inside very short period of time<150 S) , ball of rice of Ce-Zr oxide accept is ambitious to the adsorptive quantity of Pb(II) at other a few kinds of ion, and because electrochemistry detects rich part time is shorter, the quantity of material of target of adsorption of electrode material surface decides electrochemistry dissolve gives the on any account of signal, the rich market level that how analyses in dissolve ending of the dog days is adsorptive more Pb(II) , thereby more Pb(0) go to reductive deposit electrode surface, go out in dissolve then buildup electrochemistry signal is obtained in the process. Accordingly, sensitive interface can realize the electrochemistry that ball of rice of Ce-Zr oxide accept builds to reach select-high sex to detect to the Gao Lingmin of Pb(II) . The Pb(II) that way of upper part of in order to of profit of Huang Hangjiu group looks sample of water inlet of pond sewage treatment plant is medium to Hefei undertakes detecting, obtained detect well and truly of result and satisfaction reclaim rate, show this analysis method is had detect the applied latent capacity of Pb(II) of the contaminant in actual sample.
Relevant research achievement already published in Sensors And Actuators B: On Chemical. This research got fund of dean of academy of group of across of innovation of national science foundation, Chinese Academy of Sciences, Hefei wait aid financially.