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Zhaokun Xiong,Jinyan Cao,Bo Lai,Ping Yang 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-
The performance of mFe/Cu/O3 and mFe0/O3 processes was comparatively investigated through optimized the key operational parameters for degradation of p-nitrophenol (PNP). The COD removal attained by mFe/Cu/O3 process was higher than that of mFe0/O3 process under the corresponding conditions. Additionally, under the optimal conditions, the COD removal (93.6%) obtained by mFe/Cu/O3 process was more than twice of the sum (44.6%) of that by ozone (35.3%) and mFe/Cu alone (9.3%). Finally, the key active materials in mFe/Cu/O3 system, degradation pathway of PNP and reaction mechanism of mFe/Cu/O3 process were proposed according to the analysis results of intermediate products, SEM–EDS and XRD.
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Multifunctional, flexible and mechanically resilient porous polyurea/graphene composite film
Xu Cui,Chunyan Zhang,Sherif Araby,Rui Cai,Gulnur Kalimuldina,Zhaokun Yang,Qingshi Meng 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
In this study, a porous polyurea/graphene platelet (GnP) composite film with high flexibility and multifunctionalitywas developed and investigated for strain sensing and energy storage applications. Morphology and mechanical properties were studied; tensile strength and Young’s modulus wereenhanced by 132% and 900%, respectively at 5 wt% GnPs. The polyurea/GnP film exhibited high sensitivityto various strains– namely, tension, compression, bending and twisting. In tensile strain, gauge factor was1.86 and 6.26 within strain ranges of 0–30% and 30–60%, respectively. Interestingly, the film showedpiezoresistive and capacitive-type strain sensor under compression load; a 33% increase in relative resistancewith response time of 108 millisecond; and 22% increase in relative capacitance with response timeof 92 millisecond when load of 5 kPa was applied. Furthermore, the strain sensor showed high durabilityand reliability over 20,000 cycles. The developed polyurea/GnP film showed a stable capacitive performanceover 20,000 charge–discharge cycles. This work provides important insights for the potential ofpolyurea/graphene films in multifunctional sensors and flexible energy storage applications.
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