Plasma Ag nanoparticles loaded on Bi<sub>2</sub>MoO<sub>6</sub> to enhance surface oxygen vacancies for efficient nitrogen conversion to ammonia

Liu, Zhenyu; Luo, Min; Meng, Linghu; Su, Senda; Ding, Wenming; Yuan, Shengbo; Li, Hua; Li, Xiaoman

doi:10.1039/d4tc01521e

J. Mater. Chem. C

2024

DOI: 10.1039/d4tc01521e

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Plasma Ag nanoparticles loaded on Bi₂MoO₆ to enhance surface oxygen vacancies for efficient nitrogen conversion to ammonia

Zhenyu Liu,

Min Luo,

Linghu Meng

et al.

Abstract: The photocatalytic nitrogen fixation reaction based on Bi2MoO6 (BMO) still faces great challenges, which need to be achieved by enhancing the visible light absorption and photogenerated carriers separation rate, as...

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Facile Synthesis of Oxygen-Deficient CeVO₄/Bi/Bi₂MoO₆ Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O₂ and N₂ Photoreductions

Pradhan,

Bariki,

Nayak

et al. 2024

Ind. Eng. Chem. Res.

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The rapid assembly of ternary heterostructures with robust solar light absorption and high redox potential of photogenerated charged species is a pragmatic approach for achieving photocatalytic activation of tenacious atmospheric molecules. In the current study, a novel CeVO 4 /Bi/Bi 2 MoO 6 ternary heterostructure was fabricated by in situ deposition of CeVO 4 over one-pot-synthesized Bi/Bi 2 MoO 6 binary composite. The effect of the salt precursor and reaction duration on the morphology and crystal structure of Bi/Bi 2 MoO 6 was studied in detail. The initial formation of Bi 2 MoO 6 nanoplates and their subsequent disintegration to nanorods upon prolonged reaction time was observed due to concurrent leaching and reduction of Bi 3+ ions to plasmonic Bi 0 metal. The salt precursors also crucially influenced the reaction kinetics for the formation of Bi/Bi 2 MoO 6 heterostructures. The CeVO 4 /Bi/Bi 2 MoO 6 ternary heterostructure demonstrated a uniform deposition of CeVO 4 nanoparticles (10−20 nm) over Bi 2 MoO 6 nanorods that are embedded with ultrasmall Bi 0 nanodots (2−5 nm). The ternary composites displayed improved surface area, porosity, surface hydrophilic character, strong absorption in the entire UV−visible region, and enhanced space charge separation property. The enhancement in optoelectronic feature is ascribed to the creation of surface oxygen vacancies and plasmonic nature of Bi nanodots. The optimized ternary photocatalyst exhibited encouraging photocatalytic activity for H 2 O 2 generation (953 μM/g/h) and NH 4 + production (131 μmol/g/h) with reaction kinetics 7−20 and 4−5 times greater than those of pure semiconductors and CeVO 4 /Bi 2 MoO 6 binary heterostructure. The apparent conversion efficiencies for O 2 and N 2 reduction were found to be 0.9% and 3.7%, respectively. Energy band structure analysis and spectroscopic investigation of in situ generated radicals indicated a switching of charge migration route from Type-I in CeVO 4 /Bi 2 MoO 6 to Bi 0 -mediated all-solid-state Z-scheme for the CeVO 4 /Bi/Bi 2 MoO 6 composite, which accounted for its improved photocatalytic activity.

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Facile Synthesis of Oxygen-Deficient CeVO₄/Bi/Bi₂MoO₆ Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O₂ and N₂ Photoreductions

Pradhan,

Bariki,

Nayak

et al. 2024

Ind. Eng. Chem. Res.

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Green Synthesis of Silver-Incorporated Rutile TiO2 for Enhanced Photocatalytic Degradation of Ciprofloxacin and Carmine G Dye Pollutants

Abd El-Lateef,

Zeng,

Khalaf

et al. 2024

Catalysts

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Developing sustainable TiO2-based photocatalysts for environmental remediation is an increasingly significant area of research. However, a limited understanding of the long-term ecological impact of these photocatalysts poses a barrier to their practical and industrial-scale applications. To address this challenge, this work employed a green synthesis approach to prepare an Ag/TiO2 photocatalyst designed to improve environmental compatibility and enhance efficiency in pollutant degradation. Ag/TiO2 was synthesized using mushroom biomass as a natural capping to evaluate its effectiveness in the degradation of ciprofloxacin (CIP) and azo Carmine G dye (ACGD). The mushroom biomass served as a renewable cost-effective support for Ag incorporation, while the Ag modification of TiO2 could enhance the photocatalyst’s performance. Structural, chemical, and morphological characterization techniques were applied and showed that the Ag/TiO2 particles consisted of irregularly shaped nanoparticles. The CIP removal reached 82.46% after 300 min and ACGD removal efficiency went up to 83.64%. The enhanced performance is attributed to the unique electronic and structural properties of Ag-modified TiO2. This study highlights the potential of Ag/TiO2 synthesized via green methods as a high-performance photocatalyst for the effective remediation of pharmaceutical and dye pollutants in wastewater treatment applications.

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Plasma Ag nanoparticles loaded on Bi₂MoO₆ to enhance surface oxygen vacancies for efficient nitrogen conversion to ammonia

Abstract: The photocatalytic nitrogen fixation reaction based on Bi2MoO6 (BMO) still faces great challenges, which need to be achieved by enhancing the visible light absorption and photogenerated carriers separation rate, as...

Cited by 2 publications

References 59 publications

Facile Synthesis of Oxygen-Deficient CeVO₄/Bi/Bi₂MoO₆ Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O₂ and N₂ Photoreductions

Facile Synthesis of Oxygen-Deficient CeVO₄/Bi/Bi₂MoO₆ Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O₂ and N₂ Photoreductions

Green Synthesis of Silver-Incorporated Rutile TiO2 for Enhanced Photocatalytic Degradation of Ciprofloxacin and Carmine G Dye Pollutants

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Plasma Ag nanoparticles loaded on Bi2MoO6 to enhance surface oxygen vacancies for efficient nitrogen conversion to ammonia

Abstract: The photocatalytic nitrogen fixation reaction based on Bi2MoO6 (BMO) still faces great challenges, which need to be achieved by enhancing the visible light absorption and photogenerated carriers separation rate, as...

Cited by 2 publications

References 59 publications

Facile Synthesis of Oxygen-Deficient CeVO4/Bi/Bi2MoO6 Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O2 and N2 Photoreductions

Facile Synthesis of Oxygen-Deficient CeVO4/Bi/Bi2MoO6 Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O2 and N2 Photoreductions

Green Synthesis of Silver-Incorporated Rutile TiO2 for Enhanced Photocatalytic Degradation of Ciprofloxacin and Carmine G Dye Pollutants

Contact Info

Product

Resources

About

Plasma Ag nanoparticles loaded on Bi₂MoO₆ to enhance surface oxygen vacancies for efficient nitrogen conversion to ammonia

Facile Synthesis of Oxygen-Deficient CeVO₄/Bi/Bi₂MoO₆ Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O₂ and N₂ Photoreductions

Facile Synthesis of Oxygen-Deficient CeVO₄/Bi/Bi₂MoO₆ Ternary Heterostructures with Bi-Mediated Switching from Type-I to Z-Scheme Mechanism for O₂ and N₂ Photoreductions