Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Transactions of the Chinese Society of Agricultural Engineering》 2009-01
Add to Favorite Get Latest Update

Effect of ion sputtering platinum on photocatalytic degradation of ethylene in the environment of cold storage

Ye Shengying,Ai Guangjian,Song Xianliang,Luo Shucan,Li Mingbo(College of Food Science,South China Agricultural University,Guangzhou 510642,China)  
In order to investigate the effect of nano-platinum(Pt)on photocatalytic degradation of ethylene in the environment of cold storage by TiO2 anchored on activated carbon fibers(TiO2/ACF).The TiO2/ACF deposited Pt (TiO2/ACF-Pt)by a vacuum ion sputter in two different sputtering ways were prepared.Effects of TiO2/ACF-Pt prepared in different sputtering ways and time on the photocatalytic degradation rate of ethylene were investigated in the simulated cold storage environment for horticultural products.Environmental Scanning Electron Microscope(ESEM), Field Scanning Electron Microscope(FESEM)and X-ray Photoelectron Spectroscope(XPS)were used to analyze the prepared TiO2/ACF-Pt.Results showed that the kinetics of photocatalytic degradation of ethylene by TiO2/ACF desoposited Pt in the simulated cold storage environment for horticultural products could be described using the pseudo first-order equation.The prepared TiO2/ACF-Pt,in the process of which Pt was initially deposited on the surface of ACF and then TiO2 was coated,would promote the activity of ethylene decomposing.When ion sputtering time was 60 seconds(Pt/Ti atomic concentration ratio was 0.112),the apparent rate constant of the reaction of TiO2/ACF-Pt was 1.16 times as much as that of TiO2/ACF.The micrographic structure of ACF was not damaged and an excessive porous structure,which was contributive to absorbing the diluted ethylene,was obtained by the way of ion sputtering Pt.
【Fund】: 国家自然科学基金(30571075);; 广东省自然科学基金(8151064201000032)
【CateGory Index】: S609.3
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved