Triboelectric nanogenerator enhanced radical generation in a photoelectric catalysis system via pulsed direct-current

Horseradish Peroxidase‐Coupled Ag3PO4/BiVO4 Photoanode for Biophotoelectrocatalytic Degradation of Organic Contaminants

“…Obviously, higher degradation efficiency and faster reaction kinetic rate of PEC process than those of other processes are owing to the synergy between electrocatalysis and photocatalysis. This result further demonstrates that visible light irradiation and applied voltage facilitate the separation and migration efficiency of photo‐induced carriers, and thus generating more active radicals to participate in the degradation of 4‐NP [38−40] …”

A curtain purification system based on a rabbit fur-based rotating triboelectric nanogenerator for efficient photocatalytic degradation of volatile organic compounds

“…It is observed that the intensity of h + is weakened when the light and RR-TENG act for 5 min since the holes generate on the composite material neutralized the signal of the TEMPO trapping agent, which weakens the h + signal. 45 This result indicates that the external electrostatic field provided by the RR-TENG facilitates the separation of electron–hole pairs within the composite 46 and promotes more electrons (e − ) and holes (h + ) to migrate to the surface of the photocatalyst. The oxidation–reduction reaction with gaseous formaldehyde finally produces nontoxic and harmless CO 2 and H 2 O (Fig.…”

Low-frequency AC-photocatalysis coupling for high-efficiency removal of organic pollutants from water based on the self-powered triboelectric nanogenerator

“…The RPDS consists of multiple degradation units, each unit is an individual RF-TENG. Compared to segmented designs of TENG power generation, photocatalysis, solution stirring, and aeration in existing reports, 24,[28][29][30][31][32][33]36 each degradation unit of the RPDS integrates an energy harvesting system and a PEC degradation system, and can simultaneously aerate and agitate in its working state, which greatly simplies the construction, saves energy, and ensures long-term reliability. In addition, this design has high energy conversion efficiency based on the freestanding triboelectric layer mode nanogenerator, 34 and can directly convert kinetic energy into AC output without the rectier, thus causing minimizing energy loss.…”

“…Especially for the aeration process, which accounts for 58% of the wastewater treatment cost, while the energy loss exceeds 40%. 24 If a photocatalytic system can be built that does not rely on a power supply and can be replaced by using natural energy to generate self-propelled electricity, it will be a huge progress.…”

“…Therefore, we believe that there is still room for optimization in the structural design of the TENG-PEC degradation system for economic reasons. On the other, alternating current (AC) has always been not considered applicable to PEC degradation, 24,33 which must be converted to direct current (CD) for use because of its highfrequency characteristics, and the additional rectier bridge will cause energy loss. TENG offers a new possibility to provide low-frequency AC, meanwhile, since the polarity of the two electrodes is constantly changing, the pulsed AC can also effectively avoid the formation of electrode surface deposits.…”