HOẠT HÓA PEROXYMONOSULFATE BẰNG HYDROXIT PHÂN LỚP KÉP CuCoFe ĐỂ PHÂN HỦY LEVOFLOXACIN

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Nhat Huy Nguyen, Quang Tung Nguyen, Trung Dung Nguyen

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Journal of Science and Technique: Section on Physics and Chemical Engineering, 2023

Mô tả vật lý: tr.50

Bộ sưu tập: Metadata

ID: 347075

Thêm vào giỏ Liên kết toàn văn

In this study, we synthesized CuCoFe-LDH bilayer hydroxide catalysts in different Cu:Co:Fe ratios (1:1:1
1:2:1, and 1:3:2) by hydrothermal method and applied them to activate peroxymonosulfate (PMS) for decomposing levofloxacin. The obtained LDH samples were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The results showed that CuCoFe-LDH (1:3:2) has the strongest ability to activate PMS and degrade levofloxacin. After 10 minutes of reaction (catalyst content of 200 mg/L, PMS concentration of 1.629 mM, pH 7, at 30oC), the decomposition efficiency was 64.89, 83.93, and 92.58% for LDH with ratios of 1:1:1, 1:2:1, and 1:3:2, respectively. The influence of PMS concentration and reaction temperature on levofloxacin degradation was investigated. PMS at high concentrations was beneficial for the formation of active oxygen species. The degradation rate of levofloxacin was affected by temperature and the activation energy was 34.04 kJ/mol.Trong nghiên cứu này, chúng tôi báo cáo về các chất xúc tác hydroxit phân lớp kép CuCoFe-LDH theo các tỉ lệ Cu:Co:Fe khác nhau (1:1:1
1:2:1 và 1:3:2) được tổng hợp bằng phương pháp thủy nhiệt và ứng dụng để hoạt hóa PMS phân hủy levofloxacin. Các mẫu LDH thu được được đặc trưng bởi nhiễu xạ tia X (XRD), quang phổ hồng ngoại biến đổi Fourier (FT-IR), kính hiển vi điện tử quét (SEM) và phổ tán sắc năng lượng tia X (EDX). Kết quả chỉ ra CuCoFe-LDH tỉ lệ 1:3:2 có khả năng hoạt hóa PMS và phân hủy levofloxacin mạnh nhất. Sau 10 phút phản ứng, trong điều kiện hàm lượng xúc tác 200 mg/L, nồng độ PMS 1,629 mM, pH = 7, ở 30oC, hiệu quả phân hủy các LDH lần lượt là 64,89%
83,93 và 92,58% tương ứng với các tỉ lệ 1:1:1
1:2:1 và 1:3:2. Ảnh hưởng của các yếu tố nồng độ PMS và nhiệt độ phản ứng đến hiệu quả phân hủy LFV đã được khảo sát. PMS ở hàm lượng cao sẽ có lợi cho hình thành các loại oxy hoạt động. Tốc độ phân hủy của levofloxacin bị ảnh hưởng bởi nhiệt độ và năng lượng hoạt hóa là 34,04 kJ/mol.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR