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- W3113118933 endingPage "109899" @default.
- W3113118933 startingPage "109899" @default.
- W3113118933 abstract "Highly efficient ternary heterojunction of CuO/α-Fe 2 O 3 /γ-Al 2 O 3 was effectively fabricated by a facile and cost effective chemical route. The structural, chemical composition, morphology, optical and photocatalytic properties of as-prepared CuO/α-Fe 2 O 3 /γ-Al 2 O 3 photo catalyst were compared to pristine and binary samples by various characterization. Existence of all the dominant peaks of CuO, α-Fe 2 O 3 and γ-Al 2 O 3 are noticeable in XRD spectrum of CuO/α-Fe 2 O 3 /γ-Al 2 O 3 ternary photo catalyst which confirms the successful formation of the photocatalyst. SEM and HRTEM results revealed the spherical shape CuO nanoparticles with distorted α-Fe 2 O 3 agglomerated plates which led to complete diffusion with γ-Al 2 O 3 . The band gap of ternary nanocomposite was found to be 1.9 eV elucidated by UV-DRS. Brunauer-Emmett-Teller (BET) analysis showed that as-fabricated ternary CuO/α-Fe 2 O 3 /γ-Al 2 O 3 nanocomposite exhibited the porous structure with large surface area and small pore volume as compared to pristine γ-Al 2 O 3 .due to the unique ternary nanocomposite structure and synergistic effect among various components. The photocatalytic activity was examined by monitoring the deterioration of methyl orange under simulated solar light irradiation. CuO/α-Fe 2 O 3 /γ-Al 2 O 3 exhibited superior photocatalytic efficacy as compared to CuO/γ-Al 2 O 3 and α-Fe 2 O 3 /γ-Al 2 O 3 binary and pure oxides of γ-Al 2 O 3 , CuO and α-Fe 2 O 3. The marvelous photocatalytic activity of CuO/α-Fe 2 O 3 /γ-Al 2 O 3 ternary nanocomposite samples can be ascribed to their close contact, strong interfacial hybridization and proficient charge transfer capacity. The electrochemical studies such as linear sweep voltammetry (LSV) and cyclic voltammetry (CV) were carried out to explore the charge transfer behavior and support the high photo activity of ternary nanocomposite CuO/α-Fe 2 O 3 /γ-Al 2 O 3 . LSV measurements manifested that CuO/α-Fe 2 O 3 /γ-Al 2 O 3 exhibited 4.3 folds higher current density than bare γ-Al 2 O 3 which confirmed the faster electron transfer from CuO to γ-Al 2 O 3 via mediated α-Fe 2 O 3 through the interfacial potential gradient in conduction band. Cyclic voltammetry (CV) results showed that pair of anodic and cathodic peaks in CuO/α-Fe 2 O 3 /γ-Al 2 O 3 appeared which affirm the efficient increase in photo-induced e − /h + separation and suppress recombination rate of electron-hole pair. This work demonstrated that CuO/α-Fe 2 O 3 /γ-Al 2 O 3 ternary nanocomposite is found to be a promising candidate as an efficient adsorbent for organic dye removal from waste water. • CuO/α-Fe 2 O 3 /γ-Al 2 O 3 ternary nanocomposite is utilized as visible photocatalyst. • The CuO/α-Fe 2 O 3 /γ-Al 2 O 3 hybrid structure is accredited to synergistic interaction. • The hybrid structure improve light absorption and repressed e-h recombination. • Defects sites of γ-Al 2 O 3 trap the photo generated electron of CuO via α-Fe 2 O 3 . • Efficacy is due to strong interfacial hybridization and charge transfer capacity." @default.
- W3113118933 created "2020-12-21" @default.
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- W3113118933 date "2021-04-01" @default.
- W3113118933 modified "2023-10-17" @default.
- W3113118933 title "Cascade electron transfer in ternary CuO/α-Fe2O3/γ-Al2O3 nanocomposite as an effective visible photocatalyst" @default.
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- W3113118933 doi "https://doi.org/10.1016/j.jpcs.2020.109899" @default.
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