Oxygen-vacancy-enhanced piezo-photocatalytic performance of AgNbO3

Synergistic Piezo-Photocatalysis of BiOCl/NaNbO3 Heterojunction Piezoelectric Composite for High-Efficient Organic Pollutant Degradation

“…In addition to photocatalysis, piezoelectric catalysis is also an efficient and environmentally friendly dye degradation method [ 10 , 11 , 12 ]. Vibration is one of the most common sources of energy in our environment.…”

Phase-pure antiferroelectric AgNbO3 films on Si substrates: chemical solution deposition and phase transitions

“…As one of the few notable lead-free antiferroelectric families, AgNbO 3 -based compounds have aroused enormous interest in dielectric energy storage as well as other applications, such as photocatalysis and microwave devices. [6][7][8][9][10] Besides their multifunctionality, AgNbO 3 is an intriguing system due to its rich structural phases with a phase sequence commonly reported as follows:…”

“…As one of the few notable lead-free antiferroelectric families, AgNbO 3 -based compounds have aroused enormous interest in dielectric energy storage as well as other applications, such as photocatalysis and microwave devices. 6–10 Besides their multifunctionality, AgNbO 3 is an intriguing system due to its rich structural phases with a phase sequence commonly reported as follows:where both M 2 and M 3 are AFE phases, while the M 1 phase presents weak ferroelectricity (ferrielectricity), which is caused by the non-centrosymmetric structure of the Pmc 2 1 space group; O, T and C phases are high-temperature paraelectric phases. 11–15 Since the M 1 ↔ M 2 phase transition temperature is typically above room temperature, AgNbO 3 ceramics have the M 1 ferrielectric phase at room temperature, leading to a non-zero remnant polarization P r and hysteresis in the polarization-electric field ( P – E ) loop, which results in low energy storage efficiency.…”

Synergy Promotion of Elemental Doping and Oxygen Vacancies in Fe2O3 Nanorods for Photoelectrochemical Water Splitting

“…Notably, the band gap of Mg-doped Fe 2 O 3 is the smallest among them; therefore, we further investigated the influence of Mg content on the band gap of α-Fe 2 O 3 , which is 1.96, 1.95, and 2 eV for Mg–Fe 2 O 3 -5, Mg–Fe 2 O 3 -15, and Mg–Fe 2 O 3 -20, respectively. Mg-doping and abundant oxygen vacancies together lead to the narrowest band gap width of Mg–Fe 2 O 3 -15, which is particularly important for the subsequent PEC water splitting process . When excessive Mg source is added into the feed solution ( x = 20), metal oxide (MgO) might form in the bulk of α-Fe 2 O 3 , which will lead to a blue shift of the absorption edge …”

“…500 nm, and the surface became slightly rough and grainy. After doping with intrinsic metal elements, the morphology was still retained, as shown in Figure 3 43 When excessive Mg source is added into the feed solution (x = 20), metal oxide (MgO) might form in the bulk of α-Fe 2 O 3 , which will lead to a blue shift of the absorption edge. 44 We further characterized the chemical states of the asprepared samples by XPS analysis.…”