Khảo sát ảnh hưởng của nhiệt độ thủy nhiệt đến cấu trúc và đặc tính của nanocomposit 20 % ZnO-Cu2O

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Đăng Chính Huỳnh, Kim Ngà Nguyễn, Thị Lan Nguyễn, Thị Tuyết Mai Nguyễn, Ngọc Dũng Tạ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Nguyễn Tất Thành, 2023

Mô tả vật lý: tr.15

Bộ sưu tập: Metadata

ID: 341297

Thêm vào giỏ Liên kết toàn văn

The ZnO with 20 mol.% was hybridized with Cu2O to fabricate nanocomposites (20 % ZnO-Cu2O (ZC NCs)) were prepared by hydrothermal method at the investigated temperatures of (120, 200 and 250) ℃. The structural properties and characterization of the materials were investigated by physical measurements including: XRD, SEM, EDX and solid sample UV-Vis spectra. The results showed that the fabricated material samples consist of two crystalline phases (ZnO wurtzite and Cu2O octahedra) with calculated lattice parameters that were suitable for each type of crystal of the material. The average crystal sizes of the ZC120, ZC200 and ZC250 samples were (20.08, 20.36 and 22.50) nm respectively, which were grown lager when the hydrothermal temperature increase. The optical bandgap energy (Eg) of the ZC120, ZC200 and ZC250 material samples was determined to be (2.51, 2.52 and 2.56) eV, respectively. These Eg values of the fabricated ZC NCs samples were intermediate between the two types of ZnO (Eg ~ 3.37 eV) and Cu2O (Eg ~ 2.17 eV) materials, and was valid in the excitation region of visible light.ZnO với 20 % mol được lai ghép với Cu2O để tạo nanocomposit (20 % ZnO-Cu2O (ZC NCs)) chế tạo theo phương pháp thủy nhiệt ở các nhiệt độ khảo sát (120, 200 và 250) ℃. Các tính chất cấu trúc và đặc tính của vật liệu được nghiên cứu bởi các phép đo vật lý bao gồm: XRD, SEM, EDX và phổ UV-Vis mẫu rắn. Các kết quả cho thấy các mẫu vật liệu gồm hai pha tinh thể (ZnO wurtzit và Cu2O octahedra) với các thông số ô mạng đã tính toán được phù hợp với mỗi loại tinh thể tương ứng của vật liệu. Kích thước tinh thể trung bình của các mẫu ZC120, ZC200 và ZC250 tương ứng lần lượt là (20,08, 20,36 và 22,50) nm. Các tinh thể của các mẫu này phát triển lớn hơn khi nhiệt độ thủy nhiệt tăng. Năng lượng khe trống quang (Eg) của các mẫu ZC120, ZC200 và ZC250 tương ứng lần lượt là (2,51, 2,52 và 2,56) eV. Các giá trị Eg này của các mẫu ZC NCs là trung gian giữa hai loại vật liệu ZnO (Eg ~ 3,37 eV) và Cu2O (Eg ~ 2,17 eV) và đạt được giá trị nằm trong vùng kích thích của ánh sáng khả kiến.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR