Ultrahigh efficient degradation activity of single- and few-layered MoSe2 nanoflowers in dark by piezo-catalyst effect

Effect of Controlled Oxygen Vacancy on H2‐Production through the Piezocatalysis and Piezophototronics of Ferroelectric R3C ZnSnO3 Nanowires

“…[36] Longer annealing times clearly result in a greater concentration of singly ionized oxygen vacancies. [45,46] Only the R3c LNtype ZnSnO 3 NWs had significant piezodegradation activity (see Section S2, Supporting Information). However, longer annealing times (>4 h) resulted in more oxygen vacancies.…”

“…Moderated 3H-ZnSnO 3 NWs (thermally annealed for 3 h in a hydrogen environment) have the longest extended carrier lifetime of approximately 8.3 ns. There has been much recent attention devoted to piezocatalysts, [11][12][13][14] such as MoS 2 , MoSe 2 , and WS 2 , which are made of few-layered 2D materials with unique piezoelectric properties. Through the synergistic piezophototronic process, the HER reaches approximately 6000 µmol g −1 in 7 h. Crucially, the mechanical force-induced spontaneous polarization functions as a carrier separator, driving the electron and hole in opposite directions in ferroelectric ZnSnO 3 NWs; this separation reduces the recombination rate, enhancing the redox process.…”

“…Specifically, they have developed catalyst materials that play pivotal roles in the degradation of hazardous pollutants, [1] water splitting, [1][2][3] and energy source conversion. There has been much recent attention devoted to piezocatalysts, [11][12][13][14] such as MoS 2 , MoSe 2 , and WS 2 , which are made of few-layered 2D materials with unique piezoelectric properties. However, challenges remain with respect to improving photoelectrochemical conversion efficiency through doping metal transitions, cocatalysts, [6,7] heterojunction structures, [8,9] and defects states.…”

Enabling PIEZOpotential in PIEZOelectric Semiconductors for Enhanced Catalytic Activities

“…[10] Thep iezoelectric effect only exists below the Curie temperature (T c ). When the temperature T > T c ,p iezoelectric materials lose the piezoelectric property as the spontaneous polarization becomes zero.N on-centrosymmetric metal oxides are ideal candidates for piezoelectric catalysis,i ncluding BaTiO 3 , [6,11] ZnO, [9,11a, 12] PbZr x Ti 1Àx O 3 , [13] ZnSnO 3 , [14] Pb(Mg 1/3 Nb 2/3 )O 3 -32 PbTiO 3 (PMN-PT), [10,15] MoS 2 , [16] MoSe 2 , [17] BiOIO 3 (or BiOI 0.926 V 0.074 O 3 ), [18] NaN-bO 3 , [19] Bi 4 Ti 3 O 12 , [20] and Bi 2 O 2 (OH)(NO 3 ). [21] Them ost commonly observed morphologies of the materials employed in piezocatalysis are 1D (e.g.,m icrofiber, [11a,b, 13a] nanowire, [11f,12b,14] nanostrip, [18] and nanorod [12f,19, 22] )and 2D structures (e.g.,n anoplatelet, [12e] nanoplate, [18] and nanosheet [21] ).…”

Preparation and photocatalytic performance of TiO2/PbTiO3 fiber composite enhanced by external force induced piezoelectric field

“…By applying ultrasonic or mechanical force to the piezoelectric photocatalyst, the free current in the conventional semiconductor photocatalyst is improved. [17][18][19][20][21][22][23][24][25][26][27][28][29][30] At the same time, the high energy density and non-contact nature of the ultrasonic wave provide a practical application for the piezoelectric electric field to improve the photocatalytic activity of the semiconductors.…”