Tổng hợp vật liệu 2D-MXene-Ti3C2 bằng phương pháp ăn mòn chọn lọc MAX-Ti3AlC2 trong hydrogen fluoride=Synthesis of 2D-MXene-Ti3C2 by etching method from MAX-Ti3AlC2 in hydrogen fluoride solution

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Tác giả: Thị Hồng Cao

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học và Công nghệ Việt Nam, 2025

Mô tả vật lý: tr.62-66

Bộ sưu tập: Báo, Tạp chí

ID: 478435

Thêm vào giỏ

Novel materials of two-dimensional material - MXene are transition metal carbides, nitrides or carbonitides, which have unique properties such as high Young’s modulus, thermal conductivity, high electrical conductivity, hydrophilic surface, high adsorption capacity, and ion-selective adsorption. These materials are receiving research attention for applications in energy storage, catalysis, sensing, electronics and environmental remediation. MXene materials were usually synthesised by three methods, including etching, top-down and bottom-up. In which, etching is a common method that is used widely to synthesise MXene materials. In this article, 2D-MXene-Ti3C2 materials were synthesised by etching method from MAX-Ti3AlC2 in HF solution. The effects of synthesis parameters such as temperature and time on the characteristics of the materials were investigated. The obtained results show that the concentration of HF 30%, the temperature of 35oC and the time of 36 hours are suitable for synthesising 2D-MXene-Ti3C2 with good delamination. The Al elements were selected corrosion, which was confirmed by the results of energy-dispersive X-ray spectroscopy (EDX) spectra with a decrease of 94.1% Al amount (from 24.08 to 1.43%). Simultaneously, a layered structure was observed on the scanning electron microscope (SEM) images of MXene materials.Vật liệu cấu trúc hai chiều mới - MXene là tên gọi của một số cacbua, nitrua hoặc cacbonitrua kim loại chuyển tiếp, có các tính chất độc đáo như mô đun Young cao, độ dẫn nhiệt, dẫn điện cao, bề mặt ưa nước, có khả năng hấp phụ cao và hấp phụ chọn lọc ion. Vật liệu này đang nhận được sự quan tâm nghiên cứu cho những ứng dụng rộng rãi trong tích trữ năng lượng, xúc tác, cảm biến, điện tử và xử lý môi trường. MXene thường được tổng hợp bằng ba phương pháp: ăn mòn, từ trên xuống và từ dưới lên. Trong đó, ăn mòn là phương pháp được sử dụng rộng rãi. Trong bài báo này, 2D-Mxene-Ti3C2 được tổng hợp bằng phương pháp ăn mòn từ tiền chất MAX-Ti3AlC2 trong dung dịch HF. Ảnh hưởng của các thông số tổng hợp như nhiệt độ và thời gian tổng hợp đến các tính chất đặc trưng của vật liệu đã được khảo sát. Các kết quả thu được cho thấy, nồng độ HF 30%, nhiệt độ 35oC và thời gian 36 giờ là phù hợp để tổng hợp được 2D-MXene-Ti3C2 có sự tách lớp tốt. Sự ăn mòn chọn lọc nguyên tố Al được xác nhận từ kết quả giản đồ nhiễu xạ tia X (EDX) với sự giảm 94,1% hàm lượng nhôm (từ 24,08 xuống còn 1,43%). Đồng thời, một cấu trúc phân lớp cũng được quan sát trên ảnh hiển vi điện tử quét (SEM).

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