Tái kết hợp ánh sáng cao của tinh thể nano dạng ống h-BN @ ZnO/TiO2 theo sơ đồ Z đối với việc giảm thiểu các chất ô nhiễm hữu cơ độc hại

Waste and Biomass Valorization - 2024
A. Vasantham1, K. Thanigaimani1, R. Sudhakaran1, S. Mohan2, Natarajan Arumugam3, Abdulrahman I. Almansour3, P. A. Thenmozhi4, Sakkarapalayam M. Mahalingam5
1Department of Chemistry, Government Arts College (Affiliated to Bharathidasan University), Tiruchirappalli, India
2Department of Chemistry, Vivekananda College of Arts and Sciences for Women (Autonomous), Namakkal - (DT), India
3Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
4Department of Chemistry, Humanities and Science, Rajalakshmi Institute of Technology, Chennai, India
5Department of Chemistry, Purdue University, West Lafayette, USA

Tóm tắt

Trong cuộc nghiên cứu này, một loại photocatalyst có cấu trúc dị thể của nanocomposites hexagonal boronnitride@ZnO-TiO2 đã được phát triển hiệu quả bằng phương pháp xử lý thủy nhiệt. Các mối liên kết lai h-BN@ZnO/TiO2 đã làm giảm đáng kể sự kết hợp của các electron và lỗ trống được kích thích quang, cũng như sự di chuyển của các khoảng trống qua các hạt nano được cấu thành từ ZnO/TiO2. Do đó, các nanocomposites h-BN@ZnO/TiO2 thể hiện khả năng photocatalytic được cải thiện và khả năng chịu đựng cao trong việc phân hủy methyl orange (MO) trong quá trình chiếu sáng bằng ánh sáng nhìn thấy. Hơn nữa, các hạt nano h-BN@ZnO/TiO2 cho thấy hiệu suất loại bỏ MO vượt trội là 99,2% chỉ trong 20 phút, điều này cải thiện khoảng 20 lần trong hoạt động photocatalytic so với h-BN tinh khiết dưới ánh sáng nhìn thấy. Hiệu suất phân hủy cao này được cho là do khả năng hấp thụ ánh sáng mở rộng, band gap hẹp và sự ức chế hiệu quả sự tái kết hợp electron-lỗ trống thông qua sự bổ sung của ZnO-TiO2 NCs. Theo những phát hiện này, một quá trình photocatalytic giả thuyết của nanocomposites h-BN@ZnO/TiO2 cho thấy triển vọng như một photocatalyst hiện đại hiệu quả để sử dụng trong việc phân hủy các chất phẩm màu hữu cơ trong nước thải nhằm mục đích làm sạch môi trường được giả định và giải quyết.

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Waste and Biomass Valorization

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