Recently, aqueous zinc ion batteries (AZIBs) are experiencing rapid development benefiting to their high safety and increasing electrochemical performance. Among all kinds of AZIB electrode materials, organic materials have attracted attentions due to their unique advantages such as structural flexibility, small volume expansion, abundant Zn 2+ storage sites and environmental friendliness. However, issues involving electrode dissolution, sluggish electrochemical kinetics etc. still hampered the prior choice of organic electrodes. Herein, we designed a poly(1,8-diamino-naphthalene)/ graphene composite aiming to improve the availability of organic electrodes in AZIBs. By means of constructing high conducting graphene network and the synergetic effect between the two components, the electronic transfer kinetics and overall electrochemical performance of PDAN organic electrode have been fully improved. The organic-inorganic composite exhibited an initial specific capacity of 240 mA·h·g −1 and stable galvanostatic cycling after 1000 cycles, exceeding the original polymer.
Yutao Yang,Caixia Yin,Fangjun Huo,Jianbin Chao,Yongbin Zhang,Shuo Jin
In this work, we have successfully provided a novel strategy for employing commercially available fluorescent reagent as probe for hypochlorite. The strategy is based on a specific reaction promoted by hypochlorite: namely, hypochlorite oxidizes aminos of probe to imines, which has not yet been used in the fluorescent hypochlorite probe design. Interestingly, the probe showed a fluorescent response to hypochlorite with the emission shift from blue to green. Furthermore, the probe displayed high selectivity for hypochlorite over other species. The probe can be used in detecting practical sample and bioimagings. The probe developed herein made it become possible that organic complexes containing amino can be used to design fluorescence probes for hypochlorite.
Yijun Yu,Haibiao Chen,Chen Zhang,Jie He,Linling Li,Chao Teng
In this work, a good water-dispersible GO-Cu 2+ -1, 8-diaminonaphthalene complex (GCU) was synthesized from graphene oxide (GO), CuCl 2 , and 1, 8-diaminonaphthalene in mild condition. The GCU achieved histidine detection with high selectivity and high sensitivity. Upon addition of histidine, the fluorescence intensity of GCU at 410 nm increased significantly due to the blocked photoinduced electron transfer (PET) process. The linear concentrations range of histidine detection was from 0.1 to 4.0 µM, with a limit of detection (LOD) of 0.027 µM. Common amino acids and proteins do not affect the detection of histidine by GCU in water. Furthermore, the GCU has been successfully applied not only to detect histidine in water but also to measure histidine in milk. The fluorescence sensor-based assay using GCU represents a promising method for nutritional monitoring. Graphical A highly water-dispersible chemosensor GCU was synthesized from GO, CuCl 2 , and 1,8-diaminonaphthalene. The nanostructured ternary complex exhibits weak fluorescence at 410 nm due to the PET mechanism. It responds to histidine in aqueous solutions with a limit of detection (LOD) of 0.027 µM. Additionally, it can detect histidine in real milk samples, exhibiting promising application potential.
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