Journal
ACS OMEGA
Volume 8, Issue 44, Pages 41765-41772Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.3c06307
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Porous ZnTiO3/TiO2 heterostructured photocatalysts, constructed using ZIF-8 as a sacrificial template through hydrothermal and carbonization techniques, exhibit excellent photocatalytic performance under solar light irradiation.
TiO2 has been widely used in photodegradation of pollutants, but it suffers from inferior photocatalytic performance under solar light illumination. Thus, novel porous ZnTiO3/TiO2 heterostructured photocatalysts are constructed by hydrothermal and carbonization techniques using ZIF-8 as a sacrificial template. After coating with TiO2, ZIF-8 nanocubes are selectively etched and subsequently coprecipitated with Ti ions during the hydrothermal process. Thereafter, the pores generated from carbonized ZIF-8 provide a large specific surface area and abundant active reaction sites for photocatalysis after annealing, producing stable ZnTiO3/TiO2 nanocomposites. Thus, porous ZnTiO3/TiO2 heterostructured photocatalysts exhibit excellent photocatalytic performance under solar light irradiation due to the boosted electron-hole separation/transfer. The kinetic constant of ZnTiO3/TiO2 nanocomposites (4.66 x 10(-1) min(-1)) is almost 100 and 3.7 times higher than that of self-degradation (4.69 x 10(-3) min(-1)) and TiO2 (1.27 x 10(-1) min(-1)), respectively. This facile strategy provides a deep insight into synthesizing heterostructured photocatalysts with high efficiency in the field of environmental remediation.
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