Boosting nonradical process in BiOI/BiOCl heterostructure by interface oxygen vacancies

Enhancement effect of oxygen vacancy on photocatalytic CO2 reduction

“…2c and d (shown as yellow circles) confirm the existence of oxygen vacancies. 32 As demonstrated in Fig. 2e and f and Table S5,† N 2 adsorption–desorption isotherms and pore size distribution images showed that BE0, BE40, BE50 and BEG manifested a mesoporous structure.…”

Effective solar light-driven isothiazolinone degradation by morphology- and oxygen vacancy-modified Gd-doped BiOCl

“…32,33 Alternatively, oxygen vacancies (Ovs), as a structural defect, can not only serve as an electron trap to capture photogenerated electrons 34 but also promote the O 2 adsorption process and further activate O 2 to generate O 2 ˙ − radicals to improve the photocatalytic degradation ability. 35,36 For example, hydrangea-like BiOCl with abundant Ovs was synthesized by regulating the amount of methanol in the solvent, and the photogenerated electron/hole pairs were significantly inhibited due to the presence of Ovs. 37 Apart from introducing Ovs, adjusting the morphology of the photocatalyst to expose the dominant crystal plane is also an emerging method to promote the visible light response and conversion.…”

Atomic-Scale Insights into the Activation of Near-Infrared- Responsive Photoactivity in BiOCl Grain Boundaries

“…For example, dye sensitization treatment can enhance the photocatalytic activity of BiOCl, , while the sensitizer is usually an organic molecular compound that is easy to degrade under light conditions. Moreover, experimental studies demonstrate that the optical absorption of BiOCl can also be improved by coupling other semiconductors. − However, the band-edge positions of two semiconductors should satisfy staggered band alignments, and the lattice mismatch of two semiconductors creates interface defects, leading to the reduced separation and transport efficiency of photogenerated charge carriers.…”