Ferroelectric La_xFe_0.1–x Codoped ZnO Nanorod Triboelectric Nanogenerators for Electrochemical Rhodamine B Degradation

Abstract

La x Fe0.1–x codoped ZnO nanorod arrays have been successfully prepared by the simple hydrothermal method, and the concentration ratio of 1:1 of Fe and La endows the codoped ZnO arrays with optimal ferroelectric properties. Then the ferroelectric La0.05Fe0.05 codoped ZnO nonoarrays and polydimethylsiloxane (PDMS) are used as positive and negative friction materials, respectively, to assemble the triboelectric nanogenerators (TENGs). Compared with Fe- or La-doped ZnO positive friction materials, the La0.05Fe0.05 codoped ZnO positive friction layer increases the output current density of TENGs by nearly 10 times, and the TENGs have excellent output stability. Lastly, the La0.05Fe0.05 codoped ZnO/PDMS TENGs have been successfully used for the high-efficient electrocatalytic degradation of RhB in simulated seawater. The work is very beneficial to the development of self-powered electrochemical degradation of organic pollutants in wastewater.

Interspersed Reticulate Cu2WS4 Nanocrystal–PVDF/Ni Triboelectric Nanogenerators for Rhodamine B Degradation

“…Then, these strong oxidizing agents can easily degrade the organic macromolecules of Rhodamine B into small molecules of CO 2 and H 2 O . The specific chemical reactions that occur at the anode and cathode in the electrolytic cell are shown in the following equations. , 2 H 2 normalO → 2 OH ∗ + 2 H + + 2 e − Cl − + H 2 normalO → ClO − + 2 H + + 2 e − OH * / ClO − + RhB → CO 2 + H 2 normalO + NO 3 − + NH 4 + In order to verify the efficiency of electrocatalytic degradation, the mixed solution of NaCl and RhB was first kept standing for 30 min before electrocatalytic degradation to exclude the influence of other factors of photocatalysis and adsorption. Then, the TENGs were activated by hand tapping, and electrocatalytic degradation was carried out for different time periods.…”

“…Electrocatalytic degradation is an effective method to degrade these organic pollutants. Thus, as shown in Figure 8(a), the mixed solution of NaCl and RhB is filled into an electrolytic cell; 26 two Cu sheets are used as electrodes and connected with the 5 wt % Cu 2 WS 4 −PVDF/ Ni TENG. Obviously, the H 2 O molecules are electrolyzed into hydroxyl radicals OH* and hydrogen ions H + , which then react with the chloride ions Cl −1 and form ClO − .…”

“…39 The specific chemical reactions that occur at the anode and cathode in the electrolytic cell are shown in the following equations. 26…”

“…The triboelectric layer is generally regarded as a double-layer capacitor in the power generation process; the dielectric property of the triboelectric layer has an impact on the output performance. Thus, many measures have been adopted to improve the dielectric properties, such as the use of ferroelectrics and polycompounds with high dielectric constants. ,− Meanwhile, the reduction of the effective thickness of the triboelectric layer increases the capacity of the double-layer capacitor, which is also an effective way to improve the dielectric properties.…”

Energy Harvesting: Synthetic Use of Recovered Energy in Electrochemical Late‐Stage Functionalization

“…[1] In addition to recovering otherwise wasted energy, it also helps to decentralize the generation of electricity for more energy autonomy. Selfpowered electrochemical and photoelectrochemical systems are used for waste stream treatment, [2,3] sensor systems, [4,5] corrosion protection [6] and water splitting. [7] To our knowledge, applications in the synthesis of organic molecules have not been described so far.…”