CHẾ TẠO VẬT LIỆU NANOCOMPOSIT ZnO@Cu2O BẰNG PHƯƠNG PHÁP THỦY NHIỆT - CẤU TRÚC VÀ CÁC ĐẶC TÍNH CỦA VẬT LIỆU

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Tác giả: Kim Ngà Nguyễn, Thị Tuyết Mai Nguyễn, Ngọc Dũng Tạ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2022

Mô tả vật lý: tr.115

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ID: 337737

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The ZnO@Cu2O nanocomposites (50 mol% ZnO doped Cu2O nanomaterials) and Cu2O comparativenanomaterials were fabricated by hydrothermal method. The structural properties and characterization ofthe materials were investigated by physical measurement methods including: XRD, SEM/EDX and solidUV-vis spectra. The results showed that, the ZnO@Cu2O nanocomposite consists of two crystals phase ofZnO wurtzite and Cu2O octahedra with the molar ratio of ZnO doped into Cu2O as 42 mol% (according toEDX spectra results). The ZnO@Cu2O nanocomposite sample had an average crystal size determinedaccording to Debye Scherrer of 16.09nm, which was smaller than the average crystal size of the Cu2Ocomparative sample (22.02nm). The lattice parameters of the ZnO@Cu2O nanocomposite and thecomparative Cu2O nano sample were in agreement with the references. The optical bandgap energy (Eg)of the ZnO@Cu2O nanocomposite sample calculated by the Tauc equation was 2.65eV, reached anintermediate value between the Eg value of single-phase ZnO (3.37eV) and single-phase Cu2O(2.17eV), and still achieved the Eg value in the visible light excitation region.Vật liệu nanocomposit ZnO@Cu2O (vật liệu nano Cu2O pha tạp 50% ZnO theo số mol) và vật liệu sosánh nano Cu2O đã được chế tạo bằng phương pháp thủy nhiệt. Các tính chất cấu trúc và đặc tính của vậtliệu đã được khảo sát bằng các phương pháp đo vật lý bao gồm: XRD, SEM/EDX và UV-vis rắn. Kết quả khảosát cho thấy, vật liệu nanocomposit ZnO@Cu2O chế tạo bao gồm hai pha tinh thể nano ZnO wurtzit vànano Cu2O octahedra với tỷ lệ số mol ZnO pha tạp được vào vật liệu Cu2O là 42% mol (theo kết quả phổEDX). Mẫu nanocomposit ZnO@Cu2O có kích thước tinh thể trung bình được xác định theo Debye Scherrerlà 16,09nm nhỏ hơn so với kích thước tinh thể trung bình của mẫu so sánh nano Cu2O (22,02nm). Thôngsố ô mạng tinh thể của mẫu nanocomposit ZnO@Cu2O và mẫu so sánh nano Cu2O tính toán được là phùhợp với các tài liệu tham khảo. Năng lượng vùng cấm quang (Eg) của mẫu nanocomposit ZnO@Cu2O tínhđược theo phương trình Tauc là 2,65eV đạt giá trị nằm trung gian giữa giá trị Eg của ZnO đơn pha(3,37eV) và Cu2O đơn pha (2,17eV) và vẫn đạt được giá trị Eg trong vùng kích thích được ánh sáng nhìnthấy.

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