Evaluation of reduced graphene oxide-zeolitic imidazolate framework onto nanofibers

Nowadays, with the increasing of the industry in world, many heavy metal related issues is arise and increase every year. Researcher have been trying to incorporate the sensor with nanomaterial to increase the detection properties of the sensor and making those sensor to be more selective and sensitive. The material that is usually incorporated with heavy metal sensor is graphene oxide (GO) because of the thermal properties but it have some issue such as limitation when using in many electronic devices. Thus, for this study, reduced graphene oxide (rGO) is used rather than GO because the good electric properties and lower cost to fabricated, but the rGO have issue with the sensing response and the times for the recovery. Hence, rGO is combined with zeolitic imidazolate framework (ZIF) to improve the sensing properties of rGO. Therefore, the combination of rGO-ZIF is incorporated with PEI to increase the conductivity of the electrospun fiber mats produced. The fiber mats is then analyzed by using porosity test, contact angle test, and conductivity test. Results from this analysis shows that the conductivity of the electrospun PEI is increased with the addition of rGO-ZIF which is from 3.0764 × 10-6 S/cm without addition of rGO-ZIF to 2.3600 × 10-4 S/cm with addition of rGO-ZIF at 0.3 wt % concentration of rGO-ZIF.