Hiệu quả diệt vi khuẩn, nấm trong không khí của vật liệu tổ hợp Hydroxyl Apatite phủ trên TiO2 pha tạp nitơ (HA/N-TiO2)=Antibacterial and Antifungal Characteristics of Hydroxyl Apatite Composite Material Coated on Nitrogen-doped TiO2 (HA/N-TiO2)

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Tác giả: Thị Huệ Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học Trái đất và Môi trường, 2024

Mô tả vật lý: tr.59-65

Bộ sưu tập: Metadata

ID: 474339

Thêm vào giỏ

Công nghệ xúc tác quang sử dụng vật liệu nano TiO2 đã và đang được ứng dụng rộng rãi trên thế giới để xử lý các chất ô nhiễm, diệt khuẩn gram âm, gram dương, và nấm canida trong không khí, đặc biệt là không khí trong nhà. Trong nghiên cứu này, vật liệu tổ hợp Hydroxyl Apatite (HA) phủ trên TiO2 pha tạp nitơ (HA/N-TiO2) đã được chế tạo. Vật liệu có tính hấp phụ, oxi hóa khử và có khả năng xúc tác quang trong vùng ánh sáng khả kiến, giúp giảm chi phí so với sử dụng ánh sáng vùng tử ngoại (UV). Đánh giá cấu trúc và hình thái vật liệu bằng phương pháp XRD, và SEM cho thấy, HA/N-TiO2 có cấu trúc tinh thể dạng cầu rõ nét, đồng đều, kích thước trong khoảng 10-20 nm. Đánh giá khả năng diệt vi khuẩn và vi nấm trên gạch viên kích thước 10x10 cm phủ dung dịch HA/N-TiO2 với độ dày lớp phủ 0,3 μm cho hiệu quả xử lý khá rõ rệt. Dưới ánh sáng huỳnh quang 20W chiếu liên tục trong 1-9 giờ, hiệu quả diệt vi khuẩn đạt 96-100%. Ở quy mô thực tế đã thử nghiệm thành công trên bề mặt tường, số lượng vi khuẩn, nấm mốc khi có dung dịch HA/NTiO2 so với mẫu đối chứng giảm khoảng 20% sau 30 ngày. Vật liệu HA/N-TiO2 có triển vọng xử lý vi khuẩn, vi nấm ở quy mô thực tế nếu có thêm các nghiên cứu mở rộng đánh giá chi phí hiệu quả.Photocatalytic technology using nano-material HA/TiO2 has been widely applied worldwide to treat pollutants, kill airborne gram-negative and gram-positive bacteria, and candida fungi, especially indoor air. In this study, HA/N-TiO2 material was synthesized with oxidationreduction absorption properties and photocatalytic ability in the visible-light irradiation that helps reduce costs compared to using ultraviolet light (UV). The structure and morphology of the material were evaluated using XRD, SEM methods, showing HA/N-TiO2 has a spherical crystal structure, sharp, and uniform with particle sizes ranging from 10 to 30 nm. To assessment of the antibacterial and antifungal efficiency of the material, we inoculated the culture of microorganisms on 10x10 cm tiles coated with HA/N-TiO2 solution with the coating thickness of 0.3 μm. This coating thickness resulted in optimal antibacterial efficacy. With continuous fluorescent light 20 W exposure for 1-9 hours, up to 96-100% of inoculated bacteria were eliminated. In real-scale experiments on the wall surfaces, the quantity of bacteria and mold decreased by 20% after 30 days when treated with HA/NTiO2 solution compared to the control sample. HA/N-TiO2 material has the potential to treat bacteria and fungi on a practical scale if there is further cost-benefit analysis extensive research.

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