Preparation of LSPR enhanced Z-scheme Pd/WO3@SnO2 for photocatalytic decomposition of organic compounds under simulated sunlight

Ben Soltan，Wissem1; Abdalla，Mohnad2; Harrath，Karim3; Peng，Jianbiao1; Zhang，Yakun1; Cao，Zhiguo1; Liu，Haijin1

2023-10-01

10.1016/j.jece.2023.110637

Journal of Environmental Chemical Engineering   Impact Factor & Quartile

2213-2929

2213-3437

The decoration of semiconductor photocatalysts with metal nanoparticles (NPs) is an efficient strategy for improving their performance via localized-surface-plasma-resonance (LSPR). For this study, a LSPR enhanced Z-scheme Pd/WO@SnO photocatalyst was synthesized, which revealed excellent photocatalytic performance and reusability against Rhodamine B (RhB) with degradation rate of 100 % after 1 h under simulated sunlight. The reaction rate constants (k) of the Pd/WO@SnO were ∼4.9, 3.5, and 2.1 times higher than those of the WO, SnO, and WO@SnO, respectively. In this Z-scheme-structure, the transfer efficacy of photogenerated electrons was significantly promoted due to integrated electric-field between the SnO and WO, which was supported by experimental results and theoretical calculations. The deposited Pd nanoparticles served as an electron-transfer-bridge, as well as a LSPR excitation source, which played significant role in the degradation of RhB. The photodecomposition pathway of RhB was explored, and the toxicities of the intermediates were evaluated. Moreover, tetracycline (TC), chlortetracycline-hydrochloride (CTC), doxycycline-hydrate (DOX), and oxytetracycline (OTC) were tested as common antibiotic models to verify the effectiveness of the catalysts. The degradation efficiencies for TC, CTC, DOX, and OTC over Pd/WO@SnO attained 90.98 %, 96.33 %, 75.37 %, and 50.90 %, respectively, under simulated sunlight, which confirmed its strong potential for the removal of recent pollutants. Experiments and electron paramagnetic resonance (EPR) tests indicated that •O served as the major active species in the photocatalysis process, while •OH and h played secondary roles. Finally, an LSPR enhanced direct Z-scheme mechanism was proposed. This study provides a rational design strategy for the development of more efficient Z-scheme photocatalysts that exploit the LSPR-effect for photodecomposition of organic pollutant compounds.

Electron-transfer bridge LSPR Photodecomposition pathway Theoretical calculations Z-scheme Pd/WO3@SnO2

SCI

English

Others

Natural Science Foundation of Henan Province[222300420205];

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:001054895800001

ELSEVIER SCI LTD

2-s2.0-85166631513

Scopus

1.School of Environment,Henan Normal University,Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control,Ministry of Education,Henan Key Laboratory for Environmental Pollution Control,Xinxiang,453007,China
2.Research Institute of Pediatrics,Children's Hospital Affiliated to Shandong University (Jinan Children's Hospital),Jinan,China
3.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China

Ben Soltan，Wissem,Abdalla，Mohnad,Harrath，Karim,et al. Preparation of LSPR enhanced Z-scheme Pd/WO3@SnO2 for photocatalytic decomposition of organic compounds under simulated sunlight[J]. Journal of Environmental Chemical Engineering,2023,11(5).

Ben Soltan，Wissem.,Abdalla，Mohnad.,Harrath，Karim.,Peng，Jianbiao.,Zhang，Yakun.,...&Liu，Haijin.(2023).Preparation of LSPR enhanced Z-scheme Pd/WO3@SnO2 for photocatalytic decomposition of organic compounds under simulated sunlight.Journal of Environmental Chemical Engineering,11(5).

Ben Soltan，Wissem,et al."Preparation of LSPR enhanced Z-scheme Pd/WO3@SnO2 for photocatalytic decomposition of organic compounds under simulated sunlight".Journal of Environmental Chemical Engineering 11.5(2023).