Metal Modified TiO2 Nano Photocatalysts with Visible Light Response
碩士 === 東海大學 === 環境科學與工程學系 === 95 === Metal modified titania nano-photocatalysts were prepared by sol-gel method using inorganic precursor copper(II) nitrate 2.5 hydrate, chrom(III) nitrate nonahydrate and iron(III) nitrate nonahydrate. We expect that this modification can enhance the light absorpti...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/51783458730062420805 |
| Summary: | 碩士 === 東海大學 === 環境科學與工程學系 === 95 === Metal modified titania nano-photocatalysts were prepared by sol-gel method using inorganic precursor copper(II) nitrate 2.5 hydrate, chrom(III) nitrate nonahydrate and iron(III) nitrate nonahydrate. We expect that this modification can enhance the light absorption in blue spectral region. Photo-degradation of methylene blue under irradiation of blue light (450 nm) was studied.
SEM and TEM micrographs show that the size of metal modified TiO2 particles was approximatly 20 nm. XRD results indicate the prevailing existence of high dispersive anatase titania photocatalyst. BET surface area results show that specific surface area of the catalysts is 69.0-83.7 m2/g. As indicated by UV-Vis spectra, an increase in metal content results in greater absorption of blue light. The greatest photocatalytic activity in this study is obtained by using 0.1 at. % Cu-TiO2 catalyst under blue light illumination for 36 hours.
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