1 research outputs found
Interface and Defect Engineering of a Hollow TiO<sub>2</sub>@ZnIn<sub>2</sub>S<sub>4</sub> Heterojunction for Highly Enhanced CO<sub>2</sub> Photoreduction Activity
Rational
engineering of the interfaces or defects of heterojunctions
provides an effective strategy to improve their photocatalytic performance
but is still a challenge. Herein, we present an ingenious calcination
strategy of simultaneously introducing sulfur vacancies and enhancing
the interfacial interaction for a hollow TiO2@ZnIn2S4 heterojunction, thus greatly improving the photocatalytic
CO2 reduction activity. The low-temperature calcination
strategy makes the heterojunction possess both abundant sulfur vacancies
and strong interfacial interaction, which lead to an enhanced CO2 photoreduction activity with a CO evolution rate of 1330
μmol g–1 h–1, much higher
than that of the sample without calcination treatment (639 μmol
g–1 h–1). The significantly boosted
photocatalytic performance can be ascribed to the improved transfer
and separation of photogenerated charges resulting from the intimate
heterojunction interface, as well as the strengthened visible-light
absorption due to the rich sulfur vacancies. This work presents a
feasible and convenient method to optimize the performance of the
heterojunction photocatalysts by designing the interfaces and defects