Tin tức và sự kiện

Lá nhân tạo

Cập nhật lúc: 11:13:50 SA - 06/04/2010

(TNTT&GT) Các nhà khoa học đang nghiên cứu việc tạo ra nhiên liệu bằng quang hợp. Nếu thành công, công trình này có thể giúp mở đường cho một “nền kinh tế hydrogen” hiệu quả và thân thiện với môi trường.

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Dựa theo lá cây dã miên (ảnh), lá nhân tạo sẽ là năng lượng xanh của tương lai

 
Quang hợp cho phép cây sử dụng năng lượng từ ánh sáng mặt trời để chuyển đổi CO2 và nước thành các hợp chất hữu cơ. Quá trình hóa học liên quan rất phức tạp và chưa bao giờ sao chép được.
 

Mới đây, một nhóm chuyên gia Trung Quốc đã công bố thiết kế về “một lá cây vô cơ nhân tạo” (AIL) dựa trên lá cây hoa dã miên (anemone vitifolia). Các nhà khoa học đã sử dụng các hạt titanium dioxide, một chất xúc tác quang hóa phổ biến, cho phép ánh sáng mặt trời “khởi động” các phản ứng hóa học.

 

Phiên bản đầu tiên có thể được sử dụng để thu năng lượng mặt trời và sử dụng năng lượng đó một cách hiệu quả để tách nước thành ô-xy và hydrogen, là các yếu tố thành phần của nó. “Kết quả chúng tôi thu được có thể là bước quan trọng đầu tiên hướng đến việc thiết kế các hệ thống truyền năng lượng mặt trời nhân tạo dựa trên mô hình tự nhiên”, một thành viên của nhóm nghiên cứu thuộc Đại học Giao thông Thượng Hải cho biết.

 

Hydrogen là nhiên liệu cực sạch, chỉ tạo ra hơi nước khi bị đốt cháy. Một số công ty ô-tô như Toyota (Nhật Bản) đã phát triển chiếc xe dùng nhiên liệu hydrogen. Pin nhiên liệu, vốn tạo ra điện từ một phản ứng hóa học, cũng dựa trên hydro. Nhưng vấn đề với hydrogen là việc sản xuất loại nhiên liệu này bằng các phương pháp truyền thống thì tiêu tốn nhiều năng lượng và chi phí.

 

Khang Huy
(Theo Telegraph)

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