Synthesis and survey of the photocatalytic activity of SnO2/TiO2 nanotubes material under visible light

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Tác giả: Minh Thì Cao, Văn Hiếu Lê, Thị Thái Thanh Nguyễn, Văn Việt Phạm, Hoài Hân Trần, Hồng Huy Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 620.5 Nanotechnology

Thông tin xuất bản: Tạp chí Phát triển Khoa học & Công nghệ, 2017

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Bộ sưu tập: Metadata

ID: 492449

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In this paper, SnO2 nano particles were loaded on TiO2 nanotubes (SnO2/TNTs) by one-step hydrothermal method with the purpose to enhance the photocatalytic ability of TiO2 nanotubes (TNTs). Structure and morphology of the material were characterized by X-ray diffraction measurement (XRD) and transmission electron microscopy (TEM). SnO2 nano particles onto TNTs prevent the recombination of electron-hole pairs at the interface area. This contribution increased the photocatalytic efficiency of the material. The effect of SnO2 contents on the photocatalytic activities of the composite materials was also investigated with methylene blue that is chosen as the pollutant in industry. The results showed that SnO2/TNTs composite materials had been successfully synthesized by one-step hydrothermal method and SnO2/TNTs composite material with 2 % SnO2 content loading possesses the highest photocatalytic efficiency with 70 % after 180 minutes illuminated under sunlight.Trong bài báo này, các hạt nano SnO2 được đính trên ống nano TiO2 (SnO2/TNTs) bằng phương pháp thủy nhiệt một bước nhằm tăng cường khả năng quang xúc tác của ống nano TiO2 (TNTs). Cấu trúc và hình thái của vật liệu được kiểm tra bằng phương pháp nhiễu xạ tia X (XRD) và ảnh hiển vi điện tử truyền qua (TEM). Hạt nano SnO2 đính trên TNTs giúp làm giảm tốc độ tái hợp của cặp điện tử-lỗ trống tại bề mặt tiếp xúc làm tăng hiệu suất quang xúc tác của vật liệu. Khảo sát khả năng quang xúc tác của vật liệu SnO2/TNTs với các nồng độ SnO2 khác nhau được thực hiện trên đối tượng là dung dịch xanh methylene (MB) một chất nhuộm màu trong ngành công nghiệp. Kết quả cho thấy rằng, vật liệu tổ hợp SnO2/TNTs với hàm lượng 2 % SnO2 đính trên TNTs cho khả năng quang xúc tác cao nhất với hiệu suất là 70 % sau 180 phút được chiếu dưới ánh sáng mặt trời.

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