Ảnh hưởng của nồng độ HF và thời gian siêu âm đến tính chất của vật liệu 2D-MXene-Ti3C2 tổng hợp bằng phương pháp hóa học ướt=The effect of HF concentration and ultrasound time on 2D-MXene- Ti3C2 material synthesised by wet chemical method

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Tác giả: Thị Hồng Cao, Thị Mai Thanh Đinh, Văn Hoành Ngô, Thị Thơm Nguyễn, Thu Phương Nguyễn, Thị Năm Phạm, Đại Lâm Trần, Thị Thu Vũ

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ Việt Nam - B, 2025

Mô tả vật lý: tr.35

Bộ sưu tập: Báo, Tạp chí

ID: 486846

Thêm vào giỏ

Gần đây, một họ vật liệu mới cấu trúc hai chiều gọi là MXene, bao gồm các carbides/nitrides/carbonitrides kim loại chuyển tiếp đang nhận được sự quan tâm của các nhà khoa học. MXene có cấu trúc lớp 2D độc đáo nên chúng có thể dễ dàng kết hợp với các vật liệu khác để tăng cường thuộc tính cho vật liệu tổ hợp được tạo ra. Vật liệu này đang được nghiên cứu cho những ứng dụng rộng rãi, bao gồm tích trữ năng lượng, siêu tụ điện, xúc tác, màng dẫn điện, vật liệu gia cường và hấp phụ. MXene có thể được tổng hợp thông qua quá trình ăn mòn chọn lọc từ tiền chất MAXene bằng cách sử dụng dung dịch ăn mòn HF. Nghiên cứu này báo cáo ảnh hưởng của nồng độ HF và thời gian siêu âm tách lớp đến hình thái, thành phần của vật liệu 2D-MXene-Ti3C2 tổng hợp được bằng phương pháp kính hiển vi điện tử quét và phân tích quang phổ tán xạ năng lượng tia X. Các kết quả cho thấy, ở hàm lượng HF 48% và thời gian siêu âm 90 phút, vật liệu 2D-MXene-Ti3C2 có sự tách lớp tốt với hàm lượng nhôm trong phân tử còn khoảng 1,5%. Vật liệu 2D-MXene-Ti3C2 tổng hợp được có diện tích bề mặt tăng gấp 5,8 lần so với vật liệu MAX-Ti3AlC2 ban đầu.Recently, a new family of two-dimensional materials, called MXenes, which are layered structure materials of carbides/nitrides/carbonitrides of transition metal, are receiving the attention of scientists. MXene, with its unique 2D layered structure, can easily combine with other materials to enhance the properties of the resulting composite material. The materials are being investigated for wide applications including energy storage, supercapacitors, catalysis, conductive films, reinforcement and adsorbents. MXene can be synthesised through selective etching from the MAXene precursor using HF etching solution. This study reports the effect of HF concentration and ultrasonication time on the morphology and composition of the synthesised 2D-MXene-Ti3C2 materials. These characterisations were evaluated by scanning electron microscopy and X-ray energy-dispersive spectroscopy analysis. The results showed that at 48% HF and 90 min of ultrasonication time, 2D-MXene-Ti3C2 material has good delamination with the aluminum content in the molecule remaining about 1.5%. The material has an approximately 5.8-fold increase in surface area compared to the original MAX-Ti3AlC2 material.

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