Hoạt tính xúc tác quang phân hủy methylene blue bằng vật liệu nano bán dẫn ZnO pha tạp Eu và Mn: Một nghiên cứu so sánh

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Kha Lil Đinh, Imee Saladaga Padillo, Thị Khả Vân Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Trường Đại học Quy Nhơn, 2023

Mô tả vật lý: tr.10

Bộ sưu tập: Metadata

ID: 340012

Thêm vào giỏ Liên kết toàn văn

Nghiên cứu này được thực hiện nhằm tổng hợp vật liệu nano ZnO pha tạp Eu và Mn có tính chất quang học thích hợp cho ứng dụng quang xúc tác. Vật liệu nano ZnO với 1%, 5% và 10% mol kim loại pha tạp được điều chế bằng phương pháp thủy nhiệt. Các đặc tính cấu trúc, hình thái, quang học và từ tính của các hạt nano chuẩn bị được nghiên cứu bằng cách sử dụng nhiễu xạ tia X (X-ray diffraction - XRD), kính hiển vi điện tử quét (scanning electron microscope - SEM) và quang phổ phân tán năng lượng tia X (energy dispersion spectroscopy - EDS). Kết quả cho thấy các hạt nano ZnO pha tạp Eu và ZnO pha tạp Mn có cấu trúc wurtzite lục giác. Hoạt tính của các chất xúc tác quang đã tổng hợp được đánh giá dựa trên sự phân huỷ quang của methylene blue (MB) dưới sự chiếu xạ tia UV. Vật liệu ZnO pha tạp 5% mol Eu và vật liệu ZnO pha tạp 1% mol Mn cho thấy hoạt tính quang xúc tác tốt nhất. Phản ứng phân hủy MB tuân theo quy luật động học của phản ứng bậc nhất. Vật liệu ZnO pha tạp kim loại tổng hợp rất dễ phục hồi và có khả năng tái sử dụng cao.This study was carried out to synthesize Eu- and Mn-doped ZnO nanomaterials with optical properties suitable for catalytic applications. ZnO nanomaterials with 1%, 5%, and 10% mol of dopant were prepared using hydrothermal method. The structural, morphological, optical, and magnetic properties of the as-prepared nanoparticles were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), and X-ray energy dispersion spectroscopy (EDS). The results showed that the Eu-doped ZnO and Mn-doped ZnO nanoparticles exhibited a hexagonal wurtzite structure. The activity of the prepared photocatalysts was evaluated based on the photodegradation of methylene blue (MB) under ultraviolet light UV. ZnO materials doped with 5% mol Eu and ZnO materials doped with 1% mol Mn showed the best photocatalytic activity. Furthermore, the MB photodegradation reaction was observed to follow a first-order reaction. Finally, synthesized metal-doped ZnO materials are easy to recover and highly reusable.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR