Chế tạo nanocomposite từ tính Fe3O4/SiO2/TiO2 nhằm loại bỏ xanh methylen trong nước=Fabrication of Fe3O4/SiO2/TiO2 magnetic nanocomposites for removal of methylene blue dye

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Tác giả: Võ Bích Phương Hoàng, Thị Như Ngọc Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Công thương, 2024

Mô tả vật lý: tr.361-368

Bộ sưu tập: Metadata

ID: 475202

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In this study, a magnetic Fe 3 O 4 /SiO 2 /TiO 2 nanocomposite was synthesized for the removal of methylene blue (MB) dye from aqueous solutions. The fabrication process involved co-precipitation for Fe 3 O 4 core formation, sol-gel coating with SiO 2 , and TiO 2 deposition via an ultrasonic-assisted method. The influence of the Fe 3 O 4 /SiO 2 to TiO 2 ratio on the physicochemical properties and MB removal efficiency of the nanocomposite was investigated. Structural and compositional analyses, conducted through XRD, FTIR, and FE-SEM, confirmed successful synthesis. Results indicated that TiO 2 content significantly influenced the morphology and particle size of the nanocomposites. Adsorption studies revealed that the Fe 3 O 4 /SiO 2 /TiO 2 nanocomposite with a 1:4 Fe 3 O 4 /SiO 2 to TiO 2 ratio exhibited the highest MB adsorption capacity, achieving up to 15% removal efficiency, following the Langmuir isotherm model. Reusability tests demonstrated that the nanocomposite retained 80% of its initial adsorption capacity after five adsorption desorption cycles, underscoring its potential for dye removal applications.Trong nghiên cứu này, vật liệu nano từ tính Fe 3 O 4 /SiO 2 /TiO 2 đã được chế tạo để loại bỏ thuốc nhuộm methylene blue (MB) khỏi dung dịch nước. Quy trình chế tạo bao gồm phương pháp đồng kết tủa để tổng hợp Fe 3 O 4 , sau đó phủ SiO 2 bằng phương pháp sol-gel, và tiếp tục lắng đọng TiO 2 bằng phương pháp siêu âm. Nghiên cứu tiến hành xác định mức độ ảnh hưởng của tỷ lệ giữa Fe 3 O 4 /SiO 2 và TiO 2 lên các tính chất lý hóa và hiệu suất loại bỏ MB của vật liệu nano Fe 3 O 4 /SiO 2 /TiO 2 . cấu trúc và thành phần của vật liệu nanocomposite đã được xác nhận bằng các phân tích XRD, FTIR và FE-SEM. Kết quả cho thây hàm lượng TiO 2 có ảnh hưởng đáng kể đến hình thái và kích thước hạt nano của vật liệu đã tổng hợp. Các nghiên cứu hấp phụ cho thấy vật liệu nano Fe 3 O 4 /SiO 2 /TiO 2 với tỷ lệ giữa Fe 3 O 4 /SiO 2 và TiO 2 là 1/4 đạt khả năng hấp phụ MB cao nhất, lên đến 15% hiệu suất. Quá trình hấp phụ tuân theo mô hình đẳng nhiệt Langmuir. Hơn nữa, các thử nghiệm tái sử dụng cho thấy vật liệu vẫn giữ được 80% công suất hấp phụ ban đầu sau năm chu kỳ hấp phụ-giải hấp, nhân mạnh tiềm năng của vật liệu này trong các ứng dụng loại bỏ thuốc nhuộm.

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