Rational design of BiFeO3 nanostructures for efficient charge carrier transfer and consumption for photocatalytic water oxidation

Engineered Cobalt Single‐Atoms@BiFeO3 Heteronanostructures for Highly Efficient Solar Water Oxidation

“…The significance of particular crystal facets (102) and controlled morphology for improved charge–carrier separation to achieve better photocatalytic O 2 evolution response for BFO cuboids has already been established in our previous work. [ 19 ] Furthermore, in another work, we reported the introduction of Ti‐dopant and oxygen vacancies to achieve Ti‐BFO‐R nanoplates with tuned bandgap, enhanced visible light absorption, and higher driving force for O 2 evolution. [ 20 ] However, in both of these studies, AgNO 3 has been employed as an electron scavenger.…”

“…For pristine BFO and Ti-BFO-R, all diffraction peaks can be indexed as rhombohedral distorted perovskite structure with the space group of R3c (Crystallography Open database COD#96-100-1091). [19,20] After Co-SAs deposition, the absence of peaks attributed to cobalt metal or its compounds suggests that the Co species in the sample are either extremely scattered or amorphous. Moreover, the diffraction peaks of both BFO-Co 80 °C and Ti-BFO-R-Co 50 °C match well with their parent materials which indicated that no structural modification was observed after Co-SAs deposition.…”

“…Synthesis of Non-Doped BFO and Titanium-Doped and Oxygen-Deficient BFO Nanostructures: A facile hydrothermal method reported previously was employed for the synthesis of BiFeO 3 (BFO) nanostructures. [19] Briefly, in separate beakers containing acetone, specific amounts of FeCl 3 and Bi(NO 3 ) 3 •5H 2 O were dispersed and stirred for 15 min. The FeCl 3 and Bi(NO 3 ) 3 •5H 2 O suspensions were mixed together under fast stirring for 15 min.…”

“…[15][16][17][18] Previously, our group optimized various morphologies of hexagons, cuboids, and nanoplates of pristine BFO with different crystal facets and studied their influence on photocatalytic oxygen evolution. [19] Our group also investigated the simultaneous presence of titanium dopants and oxygen vacancies in BFO nanostructure to further improve their charge-carrier separation and photocatalytic oxygen evolution response. [20] In addition to appropriate morphological design, dopants and defects control, the suitable choice of co-catalyst is also of utmost importance to improve charge-carrier separation and introduce a larger number of active sites.…”

BiFeO3-Based All Perovskite Oxides Direct Z-Scheme Heterostructure for Efficient Oxygen Evolution

“…A facile hydrothermal method reported previously was employed for the synthesis of BFO nanocuboids. , Briefly, in separate beakers containing acetone, stoichiometric amounts of FeCl 3 and Bi­(NO 3 ) 3 ·5H 2 O were dispersed and stirred for 15 min. The FeCl 3 and Bi­(NO 3 ) 3 ·5H 2 O suspensions were mixed together under fast stirring for 15 min.…”