Strong tribocatalytic dye degradation by tungsten bronze Ba4Nd2Fe2Nb8O30

Tribocatalysis mechanisms: electron transfer and transition

“…The electrons are then excited by the mechanical energy, thermal energy, or electric field to achieve electron transition. Sun et al 36 used ferroelectric Ba 4 Nd 2 Fe 2 Nb 8 O 30 (BNFN) submicron powders and three PTFE magnetic bars to degrade rhodamine B by more than 97% in 2 h at a gentle stirring speed of 300 rpm. During the friction process, BNFE submicron powders lost electrons while PTFE gained electrons.…”

Tribocatalytic Degradation of Organic Pollutants Using Fe2O3 Nanoparticles

“…However, photocatalysts should have proper optical band gaps to respond to visible light because there is ∼48% visible light in the solar light. Furthermore, severe electron–hole recombination usually results in low photocatalytic efficiencies. − …”

“…Tribocatalysis is an attractive way to convert mechanical energy into chemical energy, which has been demonstrated as an effective way of harvesting mechanical energy. ,,− It can be used for the generation of flammable gases and splitting water for hydrogen production, as well as wastewater purification. , According to the law of triboelectrification, when two different types of materials rub each other under external mechanical energy, positive and negative charges accumulate on the surfaces of both the materials, respectively. , A catalyst can be used for tribocatalysis even if it is not a semiconductor, and the type of charges of any rubbed materials can be predicted by the triboelectric series . Therefore, when these rub-induced charges are released into the reaction solution, they can react with hydroxyl and oxygen to generate active species and further trigger redox reactions. − Considering that tribocatalysis is just a physical and chemical reaction on the surface of a catalyst, there is no requirement of the intrinsic electrical property of a catalyst, and thus, the selection of tribocatalysts is very abundant.…”

Unveiling the Mechanism of Frictional Catalysis in Water by Bi12TiO20: A Charge Transfer and Contaminant Decomposition Path Study

“…After that, many researchers started to exploit friction-generated charges in the field of wastewater treatment. It has been reported that a series of materials, such as Ba 0.75 Sr 0.25 TiO 3 , BiOIO 3 , Bi 2 WO 6 , CdS, and Ba 2.5 Sr 2.5 Nb 8 Ta 2 O 30 , can effectively degrade the dye in water circumstance. Moreover, Hu’s group has successfully degraded bovine serum albumin and extracellular polymeric substances by stirring tribocatalysts, biochar-regulated ZnO and Fe-doped ZnO, respectively. , Li’s group also noticed that stirring TiO 2 nanoparticles in water can produce CO, CH 4 , and H 2 , which demonstrates a great potential for nanostructured semiconductors to harvest mechanical energy through friction for flammable gas production .…”