A single-crystalline
Bi2S3 nanowire array
(Bi2S3NWA) is synthesized by an in situ hydrothermal
reaction on the surface of a Bi2MoO6 film. As
no additional source of Bi3+ is provided during the process,
the Bi2MoO6 layer acts as the Bi3+ source for the synthesis of Bi2S3 nanowires.
The fabricated Bi2MoO6/Bi2S3NWA electrode exhibited an increased photoelectrochemical (PEC) sulfite
oxidation activity, which is attributed mainly to the effective interface
obtained by the in situ hydrothermal growth, compared to other Bi2S3 electrodes. The generated electron from the
Bi2S3 conduction band rapidly transfers to that
of Bi2MoO6, yielding an enhanced electron separation
of Bi2S3. Furthermore, the single-crystalline
Bi2S3 nanowire can provide a fast electron pathway
to Bi2MoO6 through its single domain, which
also contributes to the improved PEC activity.
Individual cobalt hydroxides with clearly identified crystal structures can aid in discerning the relationship between the crystal structure and catalytic activity. Herein, the crystal structure of α-Co(OH)2 and its transformations...
A pinhole-free BiVO4 electrode was successfully synthesized using an ultrasonic-assisted synthetic method on a conductive substrate. The pinhole-free BiVO4 electrode showed highly improved photoelectrochemical activity for both sulfite oxidation and water oxidation. The blocking recombination processes were examined to clarify the enhanced photoelectrochemical performances.
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