tailieunhanh - Báo cáo hóa học: " Photocatalytic Degradation of Isopropanol Over PbSnO3 Nanostructures Under Visible Light Irradiation"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Photocatalytic Degradation of Isopropanol Over PbSnO3 Nanostructures Under Visible Light Irradiation | Nanoscale Res Lett 2009 4 274-280 DOI s11671-008-9237-y NANO EXPRESS Photocatalytic Degradation of Isopropanol Over PbSnO3 Nanostructures Under Visible Light Irradiation Di Chen Shuxin Ouyang Jinhua Ye Received 12 November 2008 Accepted 17 December 2008 Published online 7 January 2009 to the authors 2009 Abstract Nanostructured PbSnO3 photocatalysts with particulate and tubular morphologies have been synthesized from a simple hydrothermal process. As-prepared samples were characterized by X-ray diffraction Bru-nauer-Emmet-Teller surface area transmission electron microscopy and diffraction spectroscopy. The photoactivities of the PbSnO3 nanostructures for isopropanol IPA degradation under visible light irradiation were investigated systematically and the results revealed that these nanostructures show much higher photocatalytic properties than bulk PbSnO3 material. The possible growth mechanism of tubular PbSnO3 catalyst was also investigated briefly. Keywords Nanostructures Photocatalysts Introduction Since the Honda-Fujishima effect was reported in 1972 considerable efforts have been paid to develop semiconductor photocatalysts for water splitting and degradation of organic pollutants in order to solve the urgent energy and environmental issues 1-9 . However to date most of the photocatalysts reported only respond to UV light irradiation 420 nm . For visible light accounts for about 43 of the D. Chen S. Ouyang J. Ye El International Center for Materials Nanoarchitectonics MANA and Photocatalytic Materials Center PMC National Institute for Materials Science NIMS 1-2-1 Sengen Tsukuba Ibaraki 305-0047 Japan e-mail D. Chen e-mail solar spectrum the utilization of visible light is more significant than UV light and thus developing visible light-driven photocatalyst is one of the most important and meaningful subjects in this field. The fundamental steps for photocatalytic reaction of oxide semiconductor mainly include .