Tóm tắt
Bài báo này trình bày QT quá trình tổng hợp vật liệu khung zeolite imidazolate kim loại ZIF-67/graphen oxit dạng khử (ZIF-67/rGO). Vật liệu này là các hạt nano ZIF-67 phân tán đều trên tấm rGO và có diện tích bề mặt riêng lớn (498 m2·g). Lợi dụng độ dẫn điện lớn của rGO và diện tích bề mặt riêng lớn của ZIF-67, điện cực than thủy biến tính ZIF-67/rGO/GCE có tính chất điện hóa phù hợp quá trình oxi hóa Rhodamin-B (RhB). Phương pháp von-ampe xung vi phân sử dụng điện cực biến tính ZIF-67/rGO/GCE để xác định RhB có khoảng tuyến tính rộng (0,96–44,07 μg·L) và giới hạn phát hiện thấp (1,79 μg·L). Có thể sử dụng phương pháp này để xác định RhB trong các loại thực phẩm khác nhau với kết quả tương đương với phương pháp sắc ký lỏng hiệu năng cao.
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