Nghiên cứu chế tạo kính tự làm sạch với lớp xúc tác quang film bản mỏng dạng que định hướng 1D zno@rgo trên nền kính thuỷ tinh=Fabrication of zno@rgo photocatalytic thin film onriented 1d nanorod array on the glass substrate.

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Tác giả: Thanh Khuê Văn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học và Công nghệ (ĐH Công nghiệp TP. HCM), 2024

Mô tả vật lý: tr.44-56

Bộ sưu tập: Metadata

ID: 245010

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In this study, thin film of crystal nanorod array ZnO@rGO on the glass substrate was synthesized via hydrothermal and nuclei crystalline implant method. In this method, ZnO crystalline nanorod arrays were first grown onto the glass substrate. And then, rGO material subsequently anchored to the ZnO film was synthesized using the modified Hummer’s method to improve the application performance of the thin film. The thin film of as-synthesized crystal nanorod array ZnO@rGO oriented on the one dimension (1D) glass substrate was characterized by physical chemical techniques such as x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM). Performance of the film in the photocatalytic methylene blue (MB) degradation was evaluated by the UV-Vis measurement. The characterizations showed that the ZnO@rGO film is oriented on the glass substrate as 1D and well-array as well with a diameter of 50 nm and film thickness of around 1- 1.5 μm and their shape in wurtzite crystal. The XRD and TEM results reveal the evidents of the composited ZnO@rGO film formed on the glass substrate. On the other hand, the UV-Vis analysis shows photocatalytic performance of the ZnO@rGO film for the MB degradation is dominated as compared with the ZnO and ZnO@GO.Trong nghiên cứu này, vật liệu film bản mỏng ZnO nanorod được tổng hợp bằng phương pháp thủy nhiệt và phương pháp cấy mầm tinh thể. Theo đó, lớp film ZnO được cấy và phát triển thẳng hàng trên mặt kính. Để tăng hiệu quả của lớp film, vật liệu rGO được nghiên cứu tổng hợp một cách hiệu quả theo phương pháp Hummer cải tiến và kết hợp với lớp film ZnO để tạo hệ ZnO@rGO trên nền kính. Vật liệu film bản mỏng ZnO@rGO dạng que định hướng 1D sau tổng hợp được nghiên cứu các đặc trưng về hình thái học, cấu trúc tinh thể thông qua các kỹ thuật Hóa lý hiện đại như nhiễu xạ tia X (XRD), kính hiển vi điện tử quét (SEM), kính hiển vi điện tử truyền qua (TEM). Hiệu quả của lớp film được tổng hợp được ứng dụng vào phản ứng xúc tác quang hóa phân hủy chất màu hữu cơ methylene blue (MB) và được đánh giá bằng phương pháp phân tích quang phổ hấp thụ tử ngoại - khả kiến (UV-Vis). Qua các kết quả phân tích cho thấy, hình thái lớp film có dạng que với đường kính của các que trung bình khoảng 50 nm và được sắp xếp thẳng hàng, độ dày lớp film khoảng từ 1 đến 1,5μm và có cấu trúc tinh thể wurtzite của ZnO. Các kết quả phân tích nhiễu xạ XRD và TEM mô tả đặc trung lớp lớp film dị thể của rGO tạo composite với ZnO. Bên cạnh đó, phân tích UV-Vis cho thấy, hiệu quả của phản ứng xúc tác quang hóa phân hủy chất màu MB của lớp film dạng ZnO@rGO tốt hơn so với các dạng ZnO và ZnO@GO.

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