Enhanced visible-light photocatalytic remediation of atrazine over CuAl2O4-modified BaSnO3 nanoplatelets synthesized by sol-gel route
Source abstract
Abstract
Photocatalytic remediation of organic pollutants employing semiconducting nanocomposites is a capable, green, and feasible approach. In this work, the photocatalytic mineralization of emerging atrazine herbicide (AtZ) is realized utilizing sol-gel-prepared barium stannate (BaSnO 3 ) nanoplatelets that are impregnated with copper aluminate (CuAl 2O 4 ) nanoparticles for the first time. The formed CuAl 2O 4/BaSnO 3 p-n heterojunctions signified mesostructured texture with surface areas of 173–192 m 2 g 1 and 7.94 nm of pore diameter. The light harvesting in the visible regime is improved thanks to the controllable addition of CuAl 2O 4 at 15.0–20.0 wt% reducing the bandgap to 2.66 eV. The photocatalytic mineralization of AtZ has been achieved over 2.0 gL 1 15% CuAl 2O 4/BaSnO 3 at an initial rate of 20.0 µM min –1 within 40 min. Also, this optimized photocatalyst can be reused five times with 97% of its first-time use. The superb performance of CuAl 2O 4/BaSnO 3 is attributed to the efficient p-n heterojunction formation and improved visible-light harvesting that allows superior charge transfer toward the photooxidation process.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Electronic and Structural Properties of Oxides · Mercury impact and mitigation studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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