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Tạ Ngọc Bách, Lê Thị Hồng Phong, Vũ Hồng Kỳ, Đỗ Hùng Mạnh, Ngô Thị Hồng Lê, Vũ Đình Lãm, Phùng Thị Thu, Trịnh Xuân Anh

NGHIÊN CỨU CHẾ TẠO VÀ TÍNH CHẤT QUANG KHỬ CO2 CỦA Cu2O/Zn

STUDY ON THE FABRICATION AND PHOTOREDUCTION PROPERTIES OF CO2 BY Cu2O/ZnO NANOWIRE MATERIAL SYSTEM

Tạp chí Phân tích Hóa, Lý và Sinh học

2023

4

73

In this work, we successfully synthesized Cu2O/ZnO nanowire material systems, adjusting the molar ratios between Cu2O and ZnO using hydrothermal and wet chemical methods. Notably, the Cu2O nanoclusters displayed a square shape with a size of about 100-200 nm, adhered to ZnO nanowires. The Cu2O/ZnO composite system, as a photocatalyst, converts CO2 into CH4 gas in an aqueous environment. The highest conversion efficiency, at 28.44 µmol. .h-1, was achieved by the Cu2O/ZnO sample with the highest Cu2O concentration, surpassing pure ZnO (4.66 µmol. .h-1) by a factor of six. The enhanced catalytic activity is attributed to the expansion of the absorption range into the visible light region and the synergic interaction between ZnO and Cu2O at the interface. Moreover, the surface morphology plays a crucial role in enhancing the CO2 photoreduction activity of the Cu2O/ZnO system.

In this work, we successfully synthesized Cu2O/ZnO nanowire material systems, adjusting the molar ratios between Cu2O and ZnO using hydrothermal and wet chemical methods. Notably, the Cu2O nanoclusters displayed a square shape with a size of about 100-200 nm, adhered to ZnO nanowires. The Cu2O/ZnO composite system, as a photocatalyst, converts CO2 into CH4 gas in an aqueous environment. The highest conversion efficiency, at 28.44 µmol. .h-1, was achieved by the Cu2O/ZnO sample with the highest Cu2O concentration, surpassing pure ZnO (4.66 µmol. .h-1) by a factor of six. The enhanced catalytic activity is attributed to the expansion of the absorption range into the visible light region and the synergic interaction between ZnO and Cu2O at the interface. Moreover, the surface morphology plays a crucial role in enhancing the CO2 photoreduction activity of the Cu2O/ZnO system.

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