Mechanism study on photocatalytic degradation of diclofenac by PhC2Cu/SrO heterojunction
Pharmaceuticals and personal care products(PPCPs)have received widespread attention due to their potential threats to ecosystems and human health.This study introduces a novel heterojunction modification strategy,developing a phenylacetylene copper/strontium oxide(PhC2Cu/SrO)heterojunction photocatalyst for wastewater treatment.In the PhC2Cu/SrO,efficient delocalization of photogenerated electrons in PhC2Cu was successfully achieved by leveraging SrO's strong electron transfer ability,significantly enhancing its ability in the activation of molecular oxygen in water.This capability is crucial for the efficient removal of DCF from wastewater.The composite materials'morphology,structure,element distribution,and optical properties were characterized using SEM,TEM,XRD,XPS,and UV-vis DRS measurements,respectively.The results indicated that the construction of PhC2Cu/SrO heterojunction broadened its photoresponse range and enhanced carrier separation ability.With a doping ratio of 10%,PhC2Cu/SrO exhibited a photocatalytic degradation rate of DCF at 0.0207 min-1,which was 2.62 times higher than that of PhC2Cu,demonstrating remarkable photocatalytic performance.In addition,this system exhibited excellent photocatalytic activity towards a wide range of PPCPs.Ultimately,by combining electron spin resonance testing(EPR)and quenching experiments,·O2-and h+were successfully identified as the main active species in the system.This research demonstrated that PhC2Cu/SrO heterojunction photocatalyst possesses certain potential advantages in water treatment applications.
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