CAJ | 학술논문

研制了一种基于聚苯胺( PANI)的石墨pH电极，并将其成功地应用于CO2的检测中。在苯胺和盐酸的混合液中采用循环伏安法实现苯胺在石墨电极上的电聚合。实验表明，此基于聚苯胺的石墨pH电极在pH 1~pH 12的范围内呈现出很好的响应：-63.80 mV/pH(T=23℃)，-65.81 mV/pH(T=48℃)。根据Severinghaus原理，研究了此传感器在pH 4~pH 9内的pH响应情况，证明此聚苯胺修饰的石墨pH电极可被成功地应用于CO2的检测中，此CO2传感器在CO2浓度为0~1000 mbar的范围内，呈现很好的响应特性：S=42.25 mV/pCO2(mbar)=0.61 pH/pCO2(mbar)，且线性度为0.9839。因此，所研制的基于PANI的石墨pH电极可应用于生物冶金中pH和CO2的检测中。
연제료일충기우취분알( PANI)적석묵pH전겁，병장기성공지응용우CO2적검측중。재분알화염산적혼합액중채용순배복안법실현분알재석묵전겁상적전취합。실험표명，차기우취분알적석묵pH전겁재pH 1~pH 12적범위내정현출흔호적향응：-63.80 mV/pH(T=23℃)，-65.81 mV/pH(T=48℃)。근거Severinghaus원리，연구료차전감기재pH 4~pH 9내적pH향응정황，증명차취분알수식적석묵pH전겁가피성공지응용우CO2적검측중，차CO2전감기재CO2농도위0~1000 mbar적범위내，정현흔호적향응특성：S=42.25 mV/pCO2(mbar)=0.61 pH/pCO2(mbar)，차선성도위0.9839。인차，소연제적기우PANI적석묵pH전겁가응용우생물야금중pH화CO2적검측중。
In this study,polyaniline( PANI) modified graphite pH electrode has been developed and investigated,and proved to be successfully used in carbon dioxide( CO2 ) sensing. The electropolymerisation of PANI was carried out on the graphite electrode by Cyclic voltammetry method in hydrochloric acid aniline solution. It’s found that the PANI modified pH electrode showed super-Nernstain pH reponse in pH 1 ~pH 12 range:-63 . 80 mV/pH ( T=23 ℃),-65. 81 mV/pH(T=48℃). In addition,its response in strong acid solutions(pH 1~pH 3)was studied in detail,which showed -41.68 mV/pH(T=23 ℃)and -86. 12 mV/pH(T=48 ℃)pH sensitivity,thus could be used in bioleaching system. This PANI modified pH electrode was then applied into CO2 sensing according to the Severinghaus principle. This CO2 electrode exhibited good potentiometric properties( linear range:0~1 000 mbar, sensitivity:42. 25 mV/pCO2(mbar)= 0. 61 pH/pCO2(mbar),R2=0. 9839). The PANI modified pH electrode could be used in pH and CO2 sensing in bioleaching system.