FABRICATION OF MICROFLOWER-LIKE ZnO FOR DETECTING RHODAMINE B PIGMENT BY SURFACE-ENHANCED RAMAN SCATTERING

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Thi Thu Ha Pham

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2022

Mô tả vật lý: tr.45725

Bộ sưu tập: Metadata

ID: 335566

Thêm vào giỏ Liên kết toàn văn

Detecting the persistent organic pigments in industrial wastewaters has attracted much attention of scientific community in recent years. However, making the chemical sensors based on facile nanomaterials remains a lot of challenges. In this study, microflower-like ZnO has been successfully fabricated through the hydrothermal method. Morphology and size of the as-obtained ZnO productions were characterized by scanning electron microscopy (SEM). The optical properties of this material were obtained by absorption, fluorescence, Raman, and Fourier transform infrared (FTIR) techniques. The crystal structure and chemical composition of the sample were investigated by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). The results showed that the microflower-like ZnO about 110 µm in size are composed of many flat plates about 200 nm in thickness. ZnO has the crystal structure of wurzite with bandgap energy of 2.94 eV and luminescence emission peak of 630.6 nm. ZnO-based SERS substrate could detect RhB at trace concentrations with a limit of detection (LOD) as low as 10-7 M.Ngày nay việc tìm kiếm các vật liệu mới để chế tạo các cảm biến hoá học nhằm phát hiện các chất mầu hữu cơ khó phân huỷ đang là vấn đề thách thức lớn và được thu hút nhiều sự quan tâm của các nhà khoa học trên thế giới. Nghiên cứu này trình bày kết quả mới về chế tạo thành công vật liệu ZnO dạng hoa ở thang micromet bằng phương pháp thuỷ nhiệt. Hình thái, kích thước được khảo sát dưới hính hiển vi điện tử quét. Tính chất quang của vật liệu được nghiên cứu bởi phổ hấp thụ, phổ huỳnh quang, phổ Raman và phổ hồng ngoại biến đổi Fourier. Cấu trúc tinh thể và thành phần hoá học của mẫu được khảo sát bằng giản đồ nhiễu xạ tia X và phổ tán sắc năng lượng. Kết quả cho thấy các hoa micro ZnO có kích thước khoảng 110 µm bao gồm các tấm phẳng bề dầy 200 nm, cấu trúc tinh thể dạng wurzite, năng lượng vùng cấm 2,94 eV và phát xạ ở 630,6 nm. Vật liệu hoa micro ZnO được dùng làm đế SERS có độ nhạy cao trong phát hiện chất mầu Rhodamine B ở nồng độ vết và có giới hạn phát hiện đến 10-7 M.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR