One-step electropolymerization of methylene blue films on highly flexible carbon fiber electrode as supercapacitors

Abstract

Energy crisis and environmental pollution have been one of the major global issues. In this regard, the search for new energy storage materials is cheap, flexible and high-performance supercapacitors electrode which has become intensive. Also, reducing the amount of organic dyes polluting in water is a great significance. Herein, one-step electropolymerization of methylene blue on carbon fiber and the resulting films were applied to the supercapacitor. The high performance is associated to the outstanding conductivity, electrochemical stability and superior mechanical flexibility of carbon fiber. A new flexible electrode for supercapacitors was successfully fabricated by demonstrating with a good electrochemical performance and a promising alternative to reduce the water pollution.

Plasmon Energy Transfer Driven by Electrochemical Tuning of Methylene Blue on Single Gold Nanorods

“…That MB oligomerization enables RET in region II (1.6 to 1.74 eV) is supported by the second redox couple (orange stars) in Figure 1c. 39,40 The electrochemical onsets are similar to those expected for polymerization of MB. 39,40,66 However, a lack of an observable shell from MB polymer in electron microscopy images (Figure S8) and the fact that only a dilute concentration of MB (1 μM) was used here to avoid self-absorption and concentration-dependent Htype aggregation suggest that only short oligomers were created.…”

“…39,40 The electrochemical onsets are similar to those expected for polymerization of MB. 39,40,66 However, a lack of an observable shell from MB polymer in electron microscopy images (Figure S8) and the fact that only a dilute concentration of MB (1 μM) was used here to avoid self-absorption and concentration-dependent Htype aggregation suggest that only short oligomers were created. 67,68 Oligomerization creates an additional spectral range for optimal overlap with the AuNR plasmon in region II of Figure 4c.…”

“…The oligomerization process was accompanied by a decrease in the effective number of electrons involved in the redox reaction, engendering lower overpotentials than its molecular counterpart, thereby signifying two distinct redox couples (Figure 1c). 39,40 We will demonstrate that the MB oligomerization and tunable oxidation states can alter the plasmon relaxation dynamics efficiently.…”

Carbon Black Functionalized with Naturally Occurring Compounds in Water Phase for Electrochemical Sensing of Antioxidant Compounds

“…Interestingly, in the CB-SC Nyquist plot, it is possible to notice an additional shoulder in the EIS spectrum at lower frequencies. This behavior suggests an external coating onto the material surface [ 57 , 58 ], attributable in this case to the SC adsorption onto CB. Finally, as expected, the CB-RA/AuNPs exhibited the highest Rct reduction (27 ± 3 Ω), proving the synergistic role of the two nanomaterials in bringing down resistance to charge transfer.…”

Chemical Oxidative Polymerization of Methylene Blue: Reaction Mechanism and Aspects of Chain Structure

“…The successful use of polymethylene blue for the detection of natural substances, such as catechins in green tea [ 7 ], pyridoxine [ 8 ], DNA [ 9 ], hemoglobin [ 10 ], and xanthan and uric acid [ 11 ], give hope for the creation of new analyzers for medical and biological purposes. The methylene blue polymer can act as a trap for hydroxyl radicals [ 12 ], is an effective adsorbent [ 13 ], and is promising for creating supercapacitors [ 14 ]. Films based on polymethylene blue have a high conductivity of about 103 S · cm −1 , which is of interest for the creation of conducting glasses [ 15 ].…”