ẢNH HƯỞNG CỦA THỜI GIAN KHUẤY Ủ NHIỆT ĐẾN QUÁ TRÌNH TỔNG HỢP XÚC TÁC NANO TỪ TÍNH CUFE2O4 BẰNG PHƯƠNG PHÁP ĐỒNG KẾT TỦA VÀ ỨNG DỤNG TRONG PHẢN ỨNG KHỬ NHANH p-NITROANILINE
Nội dung chính của bài viết
Tóm tắt
Trong nghiên cứu này, các hạt nano từ tính CuFe2O4 đã được tổng hợp bằng kỹ thuật đồng kết tủa - khuấy ủ nhiệt trong các khoảng thời gian khác nhau nhằm ứng dụng làm xúc tác cho phản ứng khử p-nitroaniline ở nhiệt độ phòng. Kết quả cho thấy các mẫu xúc tác khi được tổng hợp bằng phương pháp này đều thể hiện cấu trúc pha spinel ổn định, cùng hàm lượng ion kim loại trên bề mặt tăng dần theo thời gian khuấy ủ nhiệt, từ đó cho phép chuyển hóa hoàn toàn p-nitroaniline thành p-phenylenediamine chỉ trong khoảng 1,25 phút. Ngoài ra, những vật liệu CuFe2O4 này còn có thể dễ dàng được thu hồi bằng nam châm và có thể tái sử dụng trong nhiều chu kỳ liên tiếp.
Từ khóa
CuFe2O4, phương pháp đồng kết tủa – khuấy ủ nhiệt, xúc tác từ tính, khử p-nitroaniline, p-phenylenediamine.
Chi tiết bài viết
Tài liệu tham khảo
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