CẤU TRÚC VÀ ĐẶC TRƯNG TÍNH CHẤT CỦA ZrO2/CuO PHA TẠP Er3+ CHO XÚC TÁC QUANG PHÂN HỦY XANH METYLEN DƯỚI ÁNH SÁNG KHẢ KIẾN=STRUCTURE AND CHARACTERISTICS OF Er3+ DOPED ZrO2/CuO FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE UNDER VISIBLE LIGHT

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Tác giả: Văn HuấN PhạM

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2024

Mô tả vật lý: tr.383 - 390

Bộ sưu tập: Metadata

ID: 480605

Thêm vào giỏ

Ô nhiễm nước thải có chứa chất màu hữu cơ khó phân hủy là một vấn đề toàn cầu, phương pháp quang xúc tác đang là phương pháp nhiều ưu việt. Tuy nhiên các vật liệu quang xúc tác hiện nay chủ yếu có hoạt tính khi được chiếu sáng bởi bức xạ UV. Trong nghiên cứu này vật liệu nano composite ZrO2/CuO pha tạp Er3+ được tổng hợp bằng phương pháp đồng kết tủa, có hoạt tính quang xúc tác dưới ánh sáng khả kiến. Đặc tính của ZrO2/CuO:Er3+ được khảo sát bằng kính hiển vi (SEM), phổ tán sắc năng lượng tia X (EDS), (TEM), XRD, phổ phản xạ khuếch tán (DRS). Các hạt nanocomposite ZrO2/CuO:Er3+ thu được có đường kính trung bình khoảng 12 - 14 nm. XRD cho thấy ZrO2 hình thành pha tetragonal, CuO hình thành pha monoclinic. Tính chất quang xúc tác của vật liệu dưới ánh sáng mặt trời mô phỏng phân hủy 95% MB (20 mg.L−1) trong thời gian 210 phút với hằng số phân hủy là kapp = 6.87×10−3 min−1. Nghiên cứu cho thấy vật liệu nano composite ZrO2/CuO pha tạp Er3+ có tiềm năng ứng dụng trong lĩnh vực xử lý nước thải dệt nhuộm, xử lý ô nhiễm nước thải dưới ánh sáng mặt trời.Wastewater pollution containing organic pigments that are difficult to decompose is a global problem, and the photocatalytic method is currently a superior method. However, current photocatalytic materials are mainly active when illuminated by UV radiation. In this study, Er3+-doped ZrO2/CuO nanocomposite materials were synthesized by co-precipitation method, with photocatalytic activity under visible light. Characteristics of ZrO2/CuO:Er3+ were investigated by scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM), X-ray diffraction (XRD), diffuse reflectance spectrum (DRS). The obtained ZrO2/CuO:Er3+ nanocomposite particles have an average diameter of about 12 - 14 nm. XRD shows that ZrO2 forms tetragonal phase, CuO forms monoclinic phase. The photocatalytic properties of the material under simulated sunlight degradation 95% of methylene blue (20 mg.L−1) in 210 minutes with a degradation constant of kapp = 6.87×10−3 min−1. Research shows that Er3+-doped ZrO2/CuO nano composite materials have potential applications in the field of textile wastewater treatment and wastewater pollution treatment with sunlight.

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